/* ─────────────────────────────────────────────
   SERİN — Design System
   Akıllı iklim sistemleri · teknik, serin, precise
   ───────────────────────────────────────────── */
:root {
  --bg: #f7f9fb;
  --bg-cool: #eef4f9;
  --bg-frost: #e4edf4;
  --surface: #ffffff;
  --surface-2: #f2f5f8;

  --ink: #0d1620;
  --ink-soft: #2b3644;
  --ink-dim: #5c6778;
  --ink-muted: #98a0ae;

  --accent: #0c8fd1;
  --accent-deep: #065d8a;
  --accent-light: #5fc3ee;
  --accent-bg: #e3f2fa;

  --navy: #0b1e33;
  --cyan: #06b6d4;
  --success: #16a34a;
  --warning: #f59e0b;

  --line: rgba(13, 22, 32, .08);
  --line-strong: rgba(13, 22, 32, .18);
  --line-accent: rgba(12, 143, 209, .35);

  /* Temp-reactive color (JS updates these on root as dial changes) */
  --dial-color: #0c8fd1;
  --dial-soft: #e3f2fa;

  --max: 1440px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  --font-display: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Geist", -apple-system, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, monospace;

  --ease: cubic-bezier(.25, .7, .25, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);

  --radius: 8px;
  --radius-lg: 14px;
  --nav-h: 72px;

  --shadow-sm: 0 1px 2px rgba(13, 22, 32, .04), 0 2px 6px rgba(13, 22, 32, .04);
  --shadow: 0 4px 12px rgba(13, 22, 32, .05), 0 16px 40px -12px rgba(13, 22, 32, .08);
  --shadow-lg: 0 20px 50px -20px rgba(12, 143, 209, .25), 0 4px 12px rgba(13, 22, 32, .05);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
*::selection { background: var(--accent); color: var(--surface); }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv11", "ss01", "ss03";
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul { list-style: none; }

/* Subtle grid background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: .5;
  background-image:
    linear-gradient(rgba(13, 22, 32, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 22, 32, .025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, #000 30%, transparent 70%);
}

/* ─────────────────────────────────────────────
   Portal home
   ───────────────────────────────────────────── */
.portal-home { position: fixed; bottom: 1rem; left: 1rem; z-index: 60; display: inline-flex; align-items: center; height: 48px; background: var(--ink); color: var(--surface); text-decoration: none; border-radius: 9999px; overflow: hidden; padding-right: 0; border: 1px solid rgba(255,255,255,.1); box-shadow: 0 10px 24px -10px rgba(13, 22, 32, .4); transition: padding-right .5s var(--ease), box-shadow .45s ease, border-color .45s ease, transform .35s ease; }
.portal-home::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(120deg, transparent 0%, rgba(12, 143, 209, .4) 45%, transparent 90%); transform: translateX(-120%); transition: transform .8s var(--ease); pointer-events: none; }
.portal-home:hover::after { transform: translateX(120%); }
.portal-home:hover { border-color: rgba(12, 143, 209, .6); box-shadow: 0 15px 40px -12px rgba(13, 22, 32, .5), 0 0 30px -6px rgba(12, 143, 209, .4); transform: translateY(-1px); }
.portal-home .pcore { position: relative; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; }
.portal-home .pring { position: absolute; inset: 8px; border-radius: 9999px; border: 1px solid rgba(12, 143, 209, .5); transition: inset .45s var(--ease), border-color .45s ease; }
.portal-home:hover .pring { inset: 5px; border-color: rgba(12, 143, 209, .9); }
.portal-home .picon { position: relative; z-index: 2; font-size: 20px; line-height: 1; color: var(--accent-light); transition: transform .4s var(--ease); }
.portal-home:hover .picon { transform: translateX(-3px); }
.portal-home .plabel { display: flex; flex-direction: column; justify-content: center; max-width: 0; overflow: hidden; white-space: nowrap; padding: 0; opacity: 0; transition: max-width .55s var(--ease), opacity .35s ease, padding .5s; }
.portal-home:hover .plabel { max-width: 240px; opacity: 1; padding: 0 1.2rem 0 .35rem; }
.portal-home .plabel-kicker { font-family: var(--font-mono); font-size: 9px; letter-spacing: .22em; text-transform: uppercase; color: var(--accent-light); margin-bottom: 2px; }
.portal-home .plabel-main { font-family: var(--font-display); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600; color: var(--surface); }

/* ─────────────────────────────────────────────
   Nav
   ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(247, 249, 251, .75);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease;
}
.nav.scrolled { background: rgba(247, 249, 251, .92); border-bottom-color: var(--line); }

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -.02em;
  color: var(--ink);
}
.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--ink);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.brand-logo::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-light) 0%, var(--accent) 50%, transparent 75%);
  animation: pulse-blue 2.8s ease-in-out infinite;
}
@keyframes pulse-blue { 0%, 100% { transform: scale(.8); opacity: .8; } 50% { transform: scale(1.1); opacity: 1; } }
.brand-logo::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, .1);
}
.brand-name { display: flex; flex-direction: column; line-height: 1; }
.brand-name .name { font-size: 1.25rem; letter-spacing: -.02em; font-weight: 700; }
.brand-name .tag { font-family: var(--font-mono); font-size: 9px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); font-weight: 400; margin-top: 3px; }

.nav-links {
  display: flex;
  gap: 2rem;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a {
  color: var(--ink-soft);
  padding: .25rem 0;
  transition: color .2s ease;
  position: relative;
}
.nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.nav-links a:hover { color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: .5rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .65rem 1rem;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .25s var(--ease), box-shadow .25s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn .arr { transition: transform .25s var(--ease); font-size: 14px; }
.btn:hover .arr { transform: translateX(3px); }

.btn-primary { background: var(--ink); color: var(--surface); }
.btn-primary:hover { background: var(--accent-deep); box-shadow: 0 10px 24px -8px rgba(6, 93, 138, .45); transform: translateY(-1px); }

.btn-accent { background: var(--accent); color: var(--surface); box-shadow: 0 2px 8px rgba(12, 143, 209, .2); }
.btn-accent:hover { background: var(--accent-deep); box-shadow: 0 12px 28px -8px rgba(12, 143, 209, .5); transform: translateY(-1px); }

.btn-outline { background: transparent; color: var(--ink); border: 1px solid var(--line-strong); }
.btn-outline:hover { border-color: var(--ink); background: var(--ink); color: var(--surface); }

.btn-ghost { background: transparent; color: var(--ink-soft); }
.btn-ghost:hover { color: var(--accent); background: var(--accent-bg); }

.btn-lg { padding: .9rem 1.4rem; font-size: 14px; border-radius: 10px; }

/* Burger */
.burger { display: none; position: relative; width: 40px; height: 40px; border-radius: 8px; border: 1px solid var(--line-strong); transition: background .2s ease, border-color .2s ease; }
.burger:hover { background: var(--surface); border-color: var(--ink); }
.burger span { position: absolute; left: 50%; width: 18px; height: 1.5px; background: var(--ink); transform: translateX(-50%); transition: top .3s var(--ease), transform .35s var(--ease), opacity .2s ease; border-radius: 2px; }
.burger span:nth-child(1) { top: 14px; }
.burger span:nth-child(2) { top: 19px; }
.burger span:nth-child(3) { top: 24px; }
.burger.active span:nth-child(1) { top: 19px; transform: translateX(-50%) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { top: 19px; transform: translateX(-50%) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  background: rgba(255, 255, 255, .98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  transition: transform .4s var(--ease), opacity .3s ease, visibility 0s linear .4s;
}
.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
  transition: transform .4s var(--ease), opacity .3s ease, visibility 0s linear 0s;
}
.mobile-menu ul { padding: 1rem var(--gutter) 2rem; }
.mobile-menu li {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .4s ease, transform .4s var(--ease);
  border-bottom: 1px solid var(--line);
}
.mobile-menu.open li { opacity: 1; transform: translateY(0); }
.mobile-menu.open li:nth-child(1) { transition-delay: .08s; }
.mobile-menu.open li:nth-child(2) { transition-delay: .14s; }
.mobile-menu.open li:nth-child(3) { transition-delay: .2s; }
.mobile-menu.open li:nth-child(4) { transition-delay: .26s; }
.mobile-menu.open li:nth-child(5) { transition-delay: .32s; }
.mobile-menu li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem .25rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
}
.mobile-menu li a.active { color: var(--accent); }
.mobile-menu li a .arr { color: var(--ink-muted); font-family: var(--font-mono); font-size: 12px; }
.mobile-menu li a.active .arr { color: var(--accent); }
.mobile-menu .mm-foot { padding: 1.5rem var(--gutter) 2rem; border-top: 1px solid var(--line); background: var(--bg-cool); font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--ink-dim); line-height: 1.8; }
.mobile-menu .mm-foot .bold { color: var(--ink); font-weight: 500; }

/* ─────────────────────────────────────────────
   Utilities
   ───────────────────────────────────────────── */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 2; }
.wrap-narrow { max-width: 920px; margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 2; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .35rem .75rem;
  background: var(--accent-bg);
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--line-accent);
}
.tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px rgba(12, 143, 209, .15); }
.tag .dot.pulse { animation: pulse-blue 2s infinite; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 2rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}
.section-head .left { max-width: 640px; }
.section-head .label {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 500;
}
.section-head .label::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.025em;
  color: var(--ink);
}
.section-head h2 .accent { color: var(--accent); }
.section-head p {
  font-size: 1rem;
  color: var(--ink-dim);
  line-height: 1.6;
  margin-top: .75rem;
  max-width: 56ch;
}

.section-pad { padding: 5rem 0; }
.section-pad-lg { padding: 7rem 0; }

/* ─────────────────────────────────────────────
   Airflow visualization (signature motif)
   Wispy wind streams — solid curves, gradient fade,
   sliding across the viewport at varied speeds
   ───────────────────────────────────────────── */
.airflow {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.airflow svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}
.airflow .wl {
  fill: none;
  stroke-linecap: round;
  stroke-width: 1.1;
  stroke: url(#windGrad);
  animation: wind-flow var(--dur, 12s) linear infinite;
  animation-delay: var(--delay, 0s);
  will-change: transform, opacity;
  opacity: .55;
}
.airflow .wl.thin {
  stroke-width: .6;
  opacity: .3;
}
.airflow .wl.bright {
  stroke: url(#windGradBright);
  stroke-width: 1.3;
  opacity: .65;
}

@keyframes wind-flow {
  0%   { transform: translateX(-60%); }
  12%, 88% { /* hold opacity handled by base .wl rule */ }
  100% { transform: translateX(60%); }
}

/* SVG gradient stops — tied to --dial-color so winds shift color with temp */
.airflow #windGrad .ws-end   { stop-color: var(--dial-color); stop-opacity: 0;   transition: stop-color .7s var(--ease); }
.airflow #windGrad .ws-mid   { stop-color: var(--dial-color); stop-opacity: .35; transition: stop-color .7s var(--ease); }
.airflow #windGrad .ws-bright{ stop-color: var(--dial-color); stop-opacity: .5;  transition: stop-color .7s var(--ease); filter: brightness(1.25); }
.airflow #windGradBright .ws-end { stop-color: var(--dial-color); stop-opacity: 0;  transition: stop-color .7s var(--ease); }
.airflow #windGradBright .ws-mid { stop-color: var(--dial-color); stop-opacity: .55; transition: stop-color .7s var(--ease); filter: brightness(1.2); }

/* Floating particles (dust carried by wind) */
.airflow .particle {
  fill: var(--dial-color);
  animation: particle-drift var(--dur, 16s) linear infinite;
  animation-delay: var(--delay, 0s);
  will-change: transform, opacity;
  transition: fill .7s var(--ease);
}

/* Hero product (AC unit) — accent lines, dot & ring follow dial color */
.hp-img .ac-lines { stroke: var(--dial-color); transition: stroke .6s var(--ease); }
.hp-img .ac-dot   { fill:   var(--dial-color); transition: fill   .6s var(--ease); }
.hp-img .ac-ring  { stroke: var(--dial-color); transition: stroke .6s var(--ease); }

/* Hero glow adapts too — subtle ambient tint */
.hero::before {
  background: radial-gradient(circle, color-mix(in srgb, var(--dial-color) 16%, transparent) 0%, transparent 70%);
  transition: background .7s var(--ease);
}
@keyframes particle-drift {
  0%   { transform: translate(-40%, 0); opacity: 0; }
  15%  { opacity: .35; }
  50%  { transform: translate(0, -8px); }
  85%  { opacity: .25; }
  100% { transform: translate(60%, 4px); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .airflow .wl, .airflow .particle { animation: none; opacity: .25; }
}

/* ─────────────────────────────────────────────
   HERO
   ───────────────────────────────────────────── */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 3rem) 0 5rem;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  max-width: 800px;
  max-height: 800px;
  background: radial-gradient(circle, var(--accent-bg) 0%, transparent 70%);
  filter: blur(40px);
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-content { position: relative; }
.hero-content .tag { margin-bottom: 1.5rem; }
.hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--ink);
  margin-bottom: 1.75rem;
}
.hero-content h1 .highlight {
  color: var(--accent);
  position: relative;
  display: inline-block;
}
.hero-content h1 .highlight::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: .05em;
  height: 6px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: .2;
  border-radius: 4px;
}
.hero-content .lead {
  font-size: 1.1rem;
  color: var(--ink-dim);
  line-height: 1.6;
  max-width: 52ch;
  margin-bottom: 2.5rem;
}
.hero-content .cta-row { display: flex; gap: .75rem; flex-wrap: wrap; margin-bottom: 3rem; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.hero-stats .stat .n {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: .2rem;
}
.hero-stats .stat .n .u { font-family: var(--font-mono); font-size: .5em; font-weight: 500; color: var(--ink-dim); letter-spacing: .05em; }
.hero-stats .stat .l { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); margin-top: .4rem; font-weight: 500; }

/* Hero product card */
.hero-product {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  padding: 1.4rem 1.5rem 1.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-product .hp-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-dim);
}
.hero-product .hp-top .live { display: flex; align-items: center; gap: .5rem; color: var(--success); }
.hero-product .hp-top .live .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); animation: pulse-green 2s infinite; }
@keyframes pulse-green { 0%,100% { box-shadow: 0 0 0 0 rgba(22, 163, 74, .4); } 50% { box-shadow: 0 0 0 6px rgba(22, 163, 74, 0); } }
.hero-product .hp-img {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--bg-cool) 0%, var(--bg-frost) 100%);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 1rem;
}
.hero-product .hp-img img { max-width: 78%; max-height: 80%; object-fit: contain; }
.hero-product .hp-name { font-size: 1.15rem; font-weight: 600; letter-spacing: -.01em; margin-bottom: .2rem; }
.hero-product .hp-sub { font-family: var(--font-mono); font-size: 11px; color: var(--ink-dim); letter-spacing: .1em; margin-bottom: .9rem; }

/* Temperature dial widget — color adapts to temp (cold→hot) */
.dial-widget {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: .85rem 1rem;
  background: var(--dial-soft);
  border: 1px solid color-mix(in srgb, var(--dial-color) 22%, transparent);
  border-radius: var(--radius);
  margin-bottom: .75rem;
  overflow: hidden;
  transition: background .6s var(--ease), border-color .6s ease;
}
.dial-widget::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 50%, color-mix(in srgb, var(--dial-color) 18%, transparent), transparent 50%);
  pointer-events: none;
  opacity: .8;
  transition: opacity .6s ease;
}

.dial {
  position: relative;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(from 210deg,
    var(--dial-color) 0deg,
    var(--dial-color) var(--deg, 180deg),
    rgba(13, 22, 32, .08) var(--deg, 180deg),
    rgba(13, 22, 32, .08) 300deg,
    transparent 300deg);
  box-shadow:
    0 0 0 4px color-mix(in srgb, var(--dial-color) 12%, transparent),
    0 6px 20px -8px color-mix(in srgb, var(--dial-color) 45%, transparent);
  transition: box-shadow .6s ease;
}
.dial::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: inset 0 1px 2px rgba(13,22,32,.04);
}
.dial::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 1px dashed color-mix(in srgb, var(--dial-color) 40%, transparent);
  opacity: .5;
  animation: dial-rotate 18s linear infinite;
  pointer-events: none;
}
@keyframes dial-rotate { to { transform: rotate(360deg); } }
.dial .val { position: relative; font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; letter-spacing: -.025em; color: var(--dial-color); transition: color .6s ease; }
.dial .val .d { font-size: .6em; opacity: .55; margin-left: 1px; }

.dial-info { position: relative; }
.dial-info .k { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; color: var(--ink-dim); text-transform: uppercase; margin-bottom: .25rem; display: flex; align-items: center; gap: .4rem; }
.dial-info .k::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--dial-color);
  box-shadow: 0 0 6px var(--dial-color);
  transition: background .6s ease, box-shadow .6s ease;
  animation: temp-pulse 2s ease-in-out infinite;
}
@keyframes temp-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }
.dial-info .v { font-size: .98rem; font-weight: 500; color: var(--ink); }
.dial-info .v em {
  color: var(--dial-color);
  font-style: normal;
  font-weight: 600;
  transition: color .6s ease;
}

/* Buttons — prominent, obvious affordance */
.dial-control {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 2;
}
.dial-control button {
  width: 44px;
  height: 36px;
  border-radius: 9px;
  background: var(--surface);
  border: 1.5px solid color-mix(in srgb, var(--dial-color) 35%, var(--line-strong));
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background .25s var(--ease), color .25s ease, border-color .3s ease, transform .2s var(--ease), box-shadow .25s ease;
  position: relative;
}
.dial-control button:hover {
  background: var(--dial-color);
  color: var(--surface);
  border-color: var(--dial-color);
  transform: scale(1.08);
  box-shadow: 0 10px 24px -8px var(--dial-color);
}
.dial-control button:active { transform: scale(.94); }
.dial-control button:focus-visible { outline: 2px solid var(--dial-color); outline-offset: 3px; }

/* Subtle attention hint: a pulsing ring after page loads (3 times) */
.dial-control button::after {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  border: 2px solid var(--dial-color);
  opacity: 0;
  pointer-events: none;
  animation: btn-hint 2.4s ease-out 1.2s 3;
}
.dial-control button:hover::after { animation: none; opacity: 0; }
@keyframes btn-hint {
  0%   { opacity: 0; transform: scale(.95); }
  25%  { opacity: .7; }
  100% { opacity: 0; transform: scale(1.35); }
}

/* Tiny label under the button pair — makes purpose explicit */
.dial-hint {
  position: absolute;
  top: 100%;
  right: 1rem;
  margin-top: .4rem;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .15em;
  color: var(--ink-dim);
  text-transform: uppercase;
  pointer-events: none;
  opacity: .7;
}

/* Energy + dB badges inside product */
.mini-badges { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; padding-top: .75rem; border-top: 1px solid var(--line); margin-top: .5rem; }
.badge-chip { display: flex; align-items: center; gap: .6rem; padding: .5rem .75rem; background: var(--bg-cool); border-radius: 6px; }
.badge-chip .l { font-family: var(--font-mono); font-size: 9px; letter-spacing: .12em; color: var(--ink-dim); text-transform: uppercase; display: block; }
.badge-chip .v { font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--ink); }
.badge-chip .v.green { color: var(--success); }
.badge-chip .v.blue { color: var(--accent); }

/* ─────────────────────────────────────────────
   Calculator widget — modernized
   Chip room selector + custom range slider + live BTU + power meter
   ───────────────────────────────────────────── */
.calc-section { padding: 3rem 0; }
.calc-widget {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2.25rem;
  box-shadow: 0 1px 2px rgba(13,22,32,.03), 0 20px 50px -20px rgba(13,22,32,.1);
  position: relative;
  overflow: hidden;
}
.calc-widget::before {
  content: "";
  position: absolute;
  top: -30%; right: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--accent-bg), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  opacity: .6;
}

.calc-widget .calc-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
  gap: 1rem;
  flex-wrap: wrap;
  position: relative;
}
.calc-widget .calc-header .t {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: .75rem;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}
.calc-widget .calc-header .t::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}
.calc-widget .calc-header h3 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.1;
}
.calc-widget .calc-header h3 .accent { color: var(--accent); }
.calc-widget .calc-header .sub {
  font-size: .95rem;
  color: var(--ink-dim);
  line-height: 1.55;
  max-width: 36ch;
  margin-top: .35rem;
}

.calc-body {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2rem;
  align-items: stretch;
  position: relative;
}

/* Left: inputs */
.calc-inputs-v2 {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}
.calc-group .group-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: .75rem;
  font-weight: 500;
}
.calc-group .group-label .val {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -.01em;
  text-transform: none;
  font-variant-numeric: tabular-nums;
}
.calc-group .group-label .val .u {
  font-family: var(--font-mono);
  font-size: .65em;
  color: var(--ink-dim);
  margin-left: 3px;
  font-weight: 500;
}

/* Room type chips */
.room-chips {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: .5rem;
}
.rc {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  padding: .85rem .35rem;
  background: var(--surface-2);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s var(--ease), box-shadow .25s ease;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: -.005em;
}
.rc svg {
  width: 20px;
  height: 20px;
  color: var(--ink-dim);
  transition: color .2s ease, transform .25s var(--ease);
  stroke-width: 1.8;
}
.rc:hover { border-color: var(--accent); color: var(--ink); transform: translateY(-1px); }
.rc:hover svg { color: var(--accent); transform: scale(1.08); }
.rc.active {
  background: var(--ink);
  color: var(--surface);
  border-color: var(--ink);
  box-shadow: 0 6px 18px -6px rgba(13,22,32,.4);
}
.rc.active svg { color: var(--accent-light); }

/* Custom range slider */
.range-wrap {
  position: relative;
  padding: 10px 0 0;
}
.range-wrap input[type="range"] {
  position: absolute;
  top: 4px;
  left: 0;
  width: 100%;
  height: 20px;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  cursor: pointer;
  z-index: 3;
  margin: 0;
}
.range-wrap input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--accent);
  box-shadow: 0 3px 10px rgba(12,143,209,.35), 0 0 0 4px rgba(12,143,209,.1);
  cursor: grab;
  transition: transform .2s var(--ease), box-shadow .25s ease;
  margin-top: -9px;
}
.range-wrap input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 14px rgba(12,143,209,.5), 0 0 0 6px rgba(12,143,209,.15);
}
.range-wrap input[type="range"]::-webkit-slider-thumb:active { cursor: grabbing; transform: scale(1.05); }
.range-wrap input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--accent);
  box-shadow: 0 3px 10px rgba(12,143,209,.35);
  cursor: grab;
}
.range-wrap input[type="range"]::-webkit-slider-runnable-track { height: 4px; background: transparent; }
.range-wrap input[type="range"]::-moz-range-track { height: 4px; background: transparent; }

.range-track {
  position: relative;
  height: 4px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
}
.range-fill {
  position: absolute;
  inset: 0;
  width: var(--pct, 15%);
  background: linear-gradient(90deg, var(--accent-light), var(--accent));
  border-radius: 3px;
  transition: width .15s ease;
}

.range-marks {
  display: flex;
  justify-content: space-between;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-dim);
  letter-spacing: .05em;
}
.range-marks span { display: flex; flex-direction: column; align-items: center; gap: .25rem; }
.range-marks span::before { content: ""; width: 1px; height: 5px; background: var(--line-strong); }

/* Right: result panel */
.calc-result-v2 {
  background: linear-gradient(135deg, #0f1f33 0%, var(--ink) 100%);
  color: var(--surface);
  padding: 1.75rem;
  border-radius: 14px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.calc-result-v2::before {
  content: "";
  position: absolute;
  top: -40%; right: -20%;
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(12, 143, 209, .22), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}
.calc-result-v2 > * { position: relative; }

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(255,255,255,.55);
}
.result-header .live-tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .6rem;
  background: rgba(34, 197, 94, .12);
  border: 1px solid rgba(34, 197, 94, .3);
  border-radius: 20px;
  color: #4ade80;
  font-size: 9px;
}
.result-header .live-tag .ld { width: 5px; height: 5px; border-radius: 50%; background: #4ade80; animation: pulse-green 2s infinite; }

.result-number {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5.5vw, 4rem);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: .4rem;
  color: var(--surface);
  font-variant-numeric: tabular-nums;
}
.result-number .unit {
  font-family: var(--font-mono);
  font-size: .28em;
  color: var(--accent-light);
  font-weight: 500;
  letter-spacing: .08em;
}

/* Power meter */
.power-meter { margin: .25rem 0 .75rem; }
.pm-track {
  height: 5px;
  background: rgba(255,255,255,.08);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
}
.pm-fill {
  position: absolute;
  inset: 0;
  width: var(--pm, 30%);
  background: linear-gradient(90deg, var(--accent-light), var(--accent), #8b5cf6);
  border-radius: 3px;
  transition: width .6s var(--ease);
}
.pm-scale {
  display: flex;
  justify-content: space-between;
  margin-top: .5rem;
  font-family: var(--font-mono);
  font-size: 9px;
  color: rgba(255,255,255,.4);
  letter-spacing: .08em;
}
.pm-scale .now {
  color: var(--accent-light);
  font-weight: 600;
}

/* Recommended card inside result */
.rec-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: .85rem 1rem;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 10px;
  transition: background .25s ease, border-color .25s ease;
  cursor: pointer;
}
.rec-card:hover { background: rgba(12,143,209,.08); border-color: rgba(12,143,209,.3); }
.rec-thumb {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: rgba(255,255,255,.05);
  display: grid;
  place-items: center;
  color: var(--accent-light);
  flex-shrink: 0;
}
.rec-thumb svg { width: 22px; height: 22px; }
.rec-info .rec-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: .15em;
  color: var(--accent-light);
  text-transform: uppercase;
  font-weight: 500;
}
.rec-info h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--surface);
  margin: 2px 0 3px;
}
.rec-info p {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255,255,255,.55);
  letter-spacing: .04em;
}
.rec-arrow {
  color: rgba(255,255,255,.4);
  font-family: var(--font-mono);
  transition: color .25s ease, transform .3s var(--ease);
}
.rec-card:hover .rec-arrow { color: var(--accent-light); transform: translateX(3px); }

/* ─────────────────────────────────────────────
   Product category grid (homepage)
   ───────────────────────────────────────────── */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.cat {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform .4s var(--ease-out), border-color .3s ease, box-shadow .4s ease;
  cursor: pointer;
  overflow: hidden;
  min-height: 280px;
}
.cat:hover { transform: translateY(-4px); border-color: var(--line-accent); box-shadow: var(--shadow-lg); }

/* Hero category — full width, horizontal 2-col layout */
.cat.hero {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.5rem;
  align-items: center;
  padding: 2rem 2.25rem;
  min-height: 340px;
}
.cat.hero .preview {
  aspect-ratio: 16 / 10;
  margin: 0;
  height: 100%;
  min-height: 280px;
}
.cat.hero .hero-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: .5rem 0;
}
.cat.hero h3 { font-size: 1.9rem; }
.cat.hero p { font-size: 1rem; color: var(--ink-soft); max-width: 42ch; }
.cat .num { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--ink-dim); font-weight: 500; }
.cat h3 { font-family: var(--font-display); font-size: 1.4rem; font-weight: 600; letter-spacing: -.015em; line-height: 1.1; color: var(--ink); margin-top: auto; }
.cat.big h3 { font-size: 1.8rem; }
.cat p { font-size: .95rem; color: var(--ink-dim); line-height: 1.5; }
.cat .specs-line {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ink-dim);
  text-transform: uppercase;
  padding-top: .75rem;
  border-top: 1px dashed var(--line);
}
.cat .specs-line .s { display: flex; align-items: center; gap: .3rem; }
.cat .specs-line .s::before { content: ""; width: 4px; height: 4px; background: var(--accent); border-radius: 50%; }
.cat .go {
  align-self: start;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--accent);
  font-weight: 500;
  transition: gap .3s ease;
}
.cat:hover .go { gap: .8rem; }

.cat .preview {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--bg-cool) 0%, var(--bg-frost) 100%);
  border-radius: 10px;
  display: grid;
  place-items: center;
  margin-bottom: .5rem;
  position: relative;
  overflow: hidden;
}
.cat .preview img { max-width: 70%; max-height: 70%; object-fit: contain; }
.cat .preview::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(12, 143, 209, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 143, 209, .05) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: .5;
}

/* ─────────────────────────────────────────────
   Technology cards
   ───────────────────────────────────────────── */
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.tech {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color .3s ease, transform .4s var(--ease-out), box-shadow .3s ease;
  position: relative;
}
.tech:hover { border-color: var(--line-accent); transform: translateY(-3px); box-shadow: var(--shadow); }
.tech .icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-bg);
  display: grid;
  place-items: center;
  color: var(--accent);
}
.tech .icon-box svg { width: 24px; height: 24px; }
.tech h4 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; letter-spacing: -.01em; color: var(--ink); }
.tech p { font-size: .9rem; color: var(--ink-dim); line-height: 1.55; }
.tech .spec-pair {
  display: flex;
  justify-content: space-between;
  padding-top: .75rem;
  border-top: 1px solid var(--line);
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.tech .spec-pair .v { color: var(--ink); font-weight: 500; }

/* ─────────────────────────────────────────────
   dB Comparison visualization
   ───────────────────────────────────────────── */
.sound-section {
  padding: 6rem 0;
  background: var(--ink);
  color: var(--surface);
  position: relative;
  overflow: hidden;
}
.sound-section::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(12, 143, 209, .15), transparent 70%);
  transform: translateX(-50%);
  filter: blur(60px);
  pointer-events: none;
}
.sound-section .section-head h2 { color: var(--surface); }
.sound-section .section-head p { color: rgba(255, 255, 255, .7); }
.sound-section .section-head .label { color: var(--accent-light); }
.sound-section .section-head .label::before { background: var(--accent-light); }

.sound-grid {
  display: grid;
  gap: .75rem;
  position: relative;
}
.sound-row {
  display: grid;
  grid-template-columns: 140px 1fr 100px 120px;
  gap: 1.5rem;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .02);
  border-radius: 10px;
  transition: border-color .3s ease, background .3s ease;
}
.sound-row:hover { border-color: rgba(255, 255, 255, .18); background: rgba(255, 255, 255, .04); }
.sound-row.you { border-color: var(--accent); background: rgba(12, 143, 209, .08); position: relative; }
.sound-row.you::before { content: "SERİN"; position: absolute; top: -9px; left: 1.5rem; background: var(--accent); color: var(--surface); font-family: var(--font-mono); font-size: 9px; letter-spacing: .14em; padding: 2px 6px; border-radius: 3px; font-weight: 600; }

.sound-row .label { font-family: var(--font-display); font-size: 1rem; font-weight: 500; }
.sound-row .label small { display: block; font-family: var(--font-mono); font-size: 10px; color: rgba(255,255,255,.5); letter-spacing: .08em; margin-top: 2px; text-transform: uppercase; }

.sound-bar {
  position: relative;
  height: 28px;
  background: rgba(255, 255, 255, .05);
  border-radius: 4px;
  overflow: hidden;
}
.sound-bar .fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: var(--w, 40%);
  background: linear-gradient(90deg, var(--accent-light), var(--accent));
  border-radius: 4px;
  transition: width 1.2s var(--ease-out);
  transform-origin: left;
}
.sound-row.quiet .sound-bar .fill { background: linear-gradient(90deg, #5fc3ee, var(--accent)); }
.sound-row.normal .sound-bar .fill { background: linear-gradient(90deg, #f59e0b, #ef4444); }
.sound-row.loud .sound-bar .fill { background: linear-gradient(90deg, #ef4444, #991b1b); }
.sound-bar .ticks {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 2px;
}
.sound-bar .ticks span { width: 1px; background: rgba(255,255,255,.1); }

.sound-row .db { font-family: var(--font-mono); font-size: 1.4rem; font-weight: 700; color: var(--surface); letter-spacing: -.02em; text-align: right; }
.sound-row .db .u { font-size: .5em; color: rgba(255,255,255,.5); margin-left: 2px; }

.sound-row .context { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; color: rgba(255,255,255,.5); text-transform: uppercase; text-align: right; }

.sound-axis { display: flex; justify-content: space-between; margin-top: 1rem; padding: 0 1.5rem; font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; color: rgba(255,255,255,.4); }

/* ─────────────────────────────────────────────
   Applications (industries)
   ───────────────────────────────────────────── */
.apps-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.app-card {
  background: var(--surface);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background .3s ease;
  cursor: pointer;
  min-height: 200px;
}
.app-card:hover { background: var(--bg-cool); }
.app-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-bg);
  color: var(--accent);
  display: grid;
  place-items: center;
}
.app-card .icon svg { width: 22px; height: 22px; }
.app-card h4 { font-family: var(--font-display); font-size: 1rem; font-weight: 600; letter-spacing: -.01em; color: var(--ink); }
.app-card .spec {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ink-dim);
  padding-top: .6rem;
  border-top: 1px solid var(--line);
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  text-transform: uppercase;
}
.app-card .spec .v { color: var(--accent); font-weight: 500; }

/* ─────────────────────────────────────────────
   Energy class badge
   ───────────────────────────────────────────── */
.energy-badge {
  display: inline-flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
  min-width: 200px;
  box-shadow: var(--shadow-sm);
}
.energy-badge .eh { padding: .6rem .9rem; background: var(--ink); color: var(--surface); font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; display: flex; justify-content: space-between; }
.energy-badge .eh .flag { color: var(--accent-light); }
.energy-badge .scale {
  display: grid;
  grid-template-columns: 1fr 48px;
  gap: 0;
}
.energy-badge .steps { display: flex; flex-direction: column; }
.energy-badge .step {
  padding: .4rem .75rem;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--surface);
  position: relative;
}
.energy-badge .step::before { content: ""; position: absolute; right: 100%; top: 50%; transform: translateY(-50%); width: 0; height: 0; border-top: 12px solid transparent; border-bottom: 12px solid transparent; border-right: 12px solid currentColor; display: none; }
.energy-badge .step.a { background: #009537; }
.energy-badge .step.b { background: #2ea52c; }
.energy-badge .step.c { background: #99b700; }
.energy-badge .step.d { background: #cec700; color: var(--ink); }
.energy-badge .step.e { background: #e8a400; }
.energy-badge .step.f { background: #e87000; }
.energy-badge .step.g { background: #c1272d; }
.energy-badge .step.active::before { display: block; color: inherit; }
.energy-badge .active-flag {
  background: var(--ink);
  color: var(--surface);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -.02em;
}

/* ─────────────────────────────────────────────
   Certifications strip
   ───────────────────────────────────────────── */
.certs { padding: 3rem 0; background: var(--bg-cool); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.certs-inner { display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.certs-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-dim); font-weight: 500; }
.certs-list { display: flex; gap: 2.5rem; flex-wrap: wrap; align-items: center; }
.cert {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -.01em;
  color: var(--ink);
}
.cert .mark {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 11px;
}
.cert small { font-family: var(--font-mono); font-size: 9px; letter-spacing: .1em; color: var(--ink-dim); text-transform: uppercase; font-weight: 500; display: block; margin-top: 1px; }

/* ─────────────────────────────────────────────
   Dealer CTA
   ───────────────────────────────────────────── */
.dealer-cta {
  background: var(--ink);
  color: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
}
.dealer-cta::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(12, 143, 209, .25), transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}
.dealer-cta h2 { font-family: var(--font-display); font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 600; line-height: 1.1; letter-spacing: -.025em; margin-bottom: 1rem; color: var(--surface); position: relative; }
.dealer-cta h2 .accent { color: var(--accent-light); }
.dealer-cta p { font-size: 1rem; color: rgba(255, 255, 255, .75); line-height: 1.55; margin-bottom: 1.5rem; max-width: 46ch; position: relative; }
.dealer-cta .cta-row { display: flex; gap: .75rem; flex-wrap: wrap; position: relative; }
.dealer-cta .map-mock {
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.dealer-cta .map-mock::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 24px 24px;
}
.map-mock .pins { position: absolute; inset: 0; }
.map-mock .pin {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(12, 143, 209, .25), 0 0 12px var(--accent);
  transform: translate(-50%, -50%);
}
.map-mock .pin.big { width: 14px; height: 14px; background: var(--accent-light); box-shadow: 0 0 0 5px rgba(95, 195, 238, .2), 0 0 20px var(--accent-light); animation: pulse-map 2.2s ease-in-out infinite; }
@keyframes pulse-map { 0%, 100% { box-shadow: 0 0 0 5px rgba(95, 195, 238, .15), 0 0 20px var(--accent-light); } 50% { box-shadow: 0 0 0 10px rgba(95, 195, 238, 0), 0 0 30px var(--accent-light); } }
.map-mock .info { position: absolute; bottom: 1rem; left: 1rem; right: 1rem; padding: .75rem 1rem; background: rgba(13, 22, 32, .8); backdrop-filter: blur(10px); border-radius: 8px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: rgba(255,255,255,.85); display: flex; justify-content: space-between; align-items: center; }
.map-mock .info .count { color: var(--accent-light); font-weight: 600; }

/* ─────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────── */
.footer { background: var(--surface); padding: 5rem 0 2rem; border-top: 1px solid var(--line); }
.footer-top { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: 3rem; padding-bottom: 3rem; border-bottom: 1px solid var(--line); }
.footer-brand { max-width: 320px; }
.footer-brand .wm { display: flex; align-items: center; gap: .6rem; font-family: var(--font-display); font-weight: 700; font-size: 1.4rem; letter-spacing: -.02em; margin-bottom: 1rem; color: var(--ink); }
.footer-brand .wm .brand-logo { width: 28px; height: 28px; }
.footer-brand p { font-size: .9rem; color: var(--ink-dim); line-height: 1.6; margin-bottom: 1.25rem; }
.footer-brand .addr { font-family: var(--font-mono); font-size: 11px; line-height: 1.8; color: var(--ink-soft); letter-spacing: .05em; }
.footer-col h6 { font-family: var(--font-display); font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 1rem; letter-spacing: -.005em; }
.footer-col ul li { padding: .35rem 0; }
.footer-col ul li a { color: var(--ink-dim); font-size: .9rem; transition: color .25s ease; }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { padding-top: 2rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: var(--ink-dim); }
.footer-bottom .sig { color: var(--accent); }
.footer-bottom .links { display: flex; gap: 1.5rem; }
.footer-bottom .links a:hover { color: var(--ink); }

/* ─────────────────────────────────────────────
   Reveal animations
   ───────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .8s var(--ease-out), transform .9s var(--ease-out); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(12px); transition: opacity .7s var(--ease-out), transform .8s var(--ease-out); }
.reveal-stagger.in > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.in > *:nth-child(1) { transition-delay: .05s; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: .12s; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: .19s; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: .26s; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: .33s; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: .40s; }
.reveal-stagger.in > *:nth-child(7) { transition-delay: .47s; }
.reveal-stagger.in > *:nth-child(8) { transition-delay: .54s; }

/* ─────────────────────────────────────────────
   PAGE HERO (inner pages)
   ───────────────────────────────────────────── */
.page-hero { padding: calc(var(--nav-h) + 4rem) 0 3rem; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; top: -20%; right: -10%; width: 50vw; height: 50vw; max-width: 600px; max-height: 600px; background: radial-gradient(circle, var(--accent-bg), transparent 70%); filter: blur(40px); z-index: 0; }
.page-hero .breadcrumb { display: inline-flex; gap: .35rem; font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: var(--ink-dim); margin-bottom: 1.25rem; align-items: center; }
.page-hero .breadcrumb a { color: var(--ink-dim); transition: color .2s ease; }
.page-hero .breadcrumb a:hover { color: var(--accent); }
.page-hero .breadcrumb .sep { color: var(--ink-muted); }
.page-hero .breadcrumb .current { color: var(--ink); font-weight: 500; }
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.5vw, 4.5rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.page-hero h1 .accent { color: var(--accent); }
.page-hero .lead { font-size: 1.05rem; color: var(--ink-dim); line-height: 1.6; max-width: 64ch; }

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}
.hero-stats-row .stat .n { font-family: var(--font-display); font-size: 1.75rem; font-weight: 600; letter-spacing: -.02em; color: var(--ink); line-height: 1; }
.hero-stats-row .stat .n .u { font-family: var(--font-mono); font-size: .5em; color: var(--accent); margin-left: .2rem; font-weight: 500; }
.hero-stats-row .stat .l { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-dim); margin-top: .4rem; }

/* ─────────────────────────────────────────────
   Products page — filter + list
   ───────────────────────────────────────────── */
.filter-bar {
  position: sticky;
  top: var(--nav-h);
  background: rgba(247, 249, 251, .92);
  backdrop-filter: blur(12px);
  padding: 1rem var(--gutter);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  z-index: 30;
  margin: 0 calc(-1 * var(--gutter));
}
.filter-inner { max-width: var(--max); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.filter-chips { display: flex; gap: .5rem; flex-wrap: wrap; }
.chip { padding: .5rem .9rem; border-radius: 9999px; font-family: var(--font-display); font-size: 13px; font-weight: 500; color: var(--ink-soft); background: var(--surface); border: 1px solid var(--line); cursor: pointer; transition: all .2s ease; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.chip .count { font-family: var(--font-mono); font-size: 10px; color: var(--ink-muted); margin-left: .4rem; letter-spacing: .05em; }
.chip.active .count { color: var(--accent-light); }

.filter-sort { display: flex; align-items: center; gap: .6rem; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--ink-dim); text-transform: uppercase; }
.filter-sort select { font-family: inherit; font-size: 12px; letter-spacing: .08em; padding: .5rem .75rem; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); }

.product-list { padding: 2rem 0 4rem; display: flex; flex-direction: column; gap: 1.25rem; }
.prod-row {
  display: grid;
  grid-template-columns: 1.2fr 2fr 1fr auto;
  gap: 2rem;
  padding: 1.75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  align-items: center;
  transition: border-color .3s ease, transform .3s var(--ease-out), box-shadow .3s ease;
  position: relative;
}
.prod-row:hover { border-color: var(--line-accent); box-shadow: var(--shadow); transform: translateX(3px); }

.prod-visual {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--bg-cool), var(--bg-frost));
  border-radius: 10px;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.prod-visual img { max-width: 75%; max-height: 75%; object-fit: contain; }
.prod-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(12, 143, 209, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 143, 209, .04) 1px, transparent 1px);
  background-size: 20px 20px;
}

.prod-info { }
.prod-info .sku { font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: var(--ink-dim); margin-bottom: .35rem; }
.prod-info h3 { font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; letter-spacing: -.015em; color: var(--ink); margin-bottom: .4rem; line-height: 1.1; }
.prod-info p { font-size: .9rem; color: var(--ink-dim); line-height: 1.55; margin-bottom: 1rem; max-width: 50ch; }
.spec-matrix { display: grid; grid-template-columns: repeat(4, auto); gap: 0 1.5rem; font-family: var(--font-mono); font-size: 10px; letter-spacing: .05em; color: var(--ink-dim); text-transform: uppercase; }
.spec-matrix .cell .l { display: block; margin-bottom: 2px; }
.spec-matrix .cell .v { font-family: var(--font-display); font-size: 15px; font-weight: 600; color: var(--ink); letter-spacing: -.01em; text-transform: none; }
.spec-matrix .cell .v .u { font-family: var(--font-mono); font-size: 10px; color: var(--ink-dim); margin-left: 2px; font-weight: 500; }

.prod-meta { display: flex; flex-direction: column; gap: .75rem; align-items: end; }
.prod-meta .label-row { display: flex; gap: .4rem; align-items: center; }
.prod-meta .energy-pill { background: var(--success); color: var(--surface); font-family: var(--font-display); font-weight: 700; padding: .25rem .5rem; border-radius: 4px; font-size: 13px; letter-spacing: -.01em; }
.prod-meta .db-pill { background: var(--bg-cool); color: var(--accent-deep); font-family: var(--font-mono); font-size: 11px; font-weight: 600; padding: .25rem .5rem; border-radius: 4px; letter-spacing: .05em; }
.prod-meta .price { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--ink); letter-spacing: -.015em; }
.prod-meta .price small { font-family: var(--font-mono); font-size: 10px; color: var(--ink-dim); letter-spacing: .08em; font-weight: 500; margin-left: 3px; text-transform: uppercase; }

.prod-go {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-cool);
  color: var(--accent);
  transition: background .3s ease, color .3s ease, transform .3s var(--ease-out);
}
.prod-row:hover .prod-go { background: var(--accent); color: var(--surface); transform: translateX(4px); }

/* ─────────────────────────────────────────────
   Technology page long sections
   ───────────────────────────────────────────── */
.tech-section { padding: 6rem 0; border-top: 1px solid var(--line); position: relative; }
.tech-section:first-of-type { border-top: 0; }
.tech-section.alt { background: var(--bg-cool); }
.tech-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.tech-layout.reverse { direction: rtl; }
.tech-layout.reverse > * { direction: ltr; }

.tech-copy .num { font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em; color: var(--accent); margin-bottom: 1rem; font-weight: 500; display: inline-flex; align-items: center; gap: .5rem; }
.tech-copy .num::before { content: ""; width: 24px; height: 1px; background: var(--accent); }
.tech-copy h2 { font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem); font-weight: 600; line-height: 1.05; letter-spacing: -.03em; margin-bottom: 1.25rem; color: var(--ink); }
.tech-copy h2 .accent { color: var(--accent); }
.tech-copy p { font-size: 1.05rem; color: var(--ink-soft); line-height: 1.65; margin-bottom: 1rem; max-width: 50ch; }
.tech-copy .feature-list { margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.tech-copy .feat { padding: 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.tech-copy .feat .fk { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; color: var(--ink-dim); text-transform: uppercase; margin-bottom: .35rem; font-weight: 500; }
.tech-copy .feat .fv { font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; letter-spacing: -.015em; color: var(--ink); }
.tech-copy .feat .fv .u { font-family: var(--font-mono); font-size: .6em; color: var(--accent); font-weight: 500; margin-left: 2px; }

.tech-visual {
  aspect-ratio: 4 / 3;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.tech-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 50% 50%, var(--accent-bg), transparent 60%);
  opacity: .5;
}
.tech-visual svg { position: relative; width: 80%; height: 80%; }

/* ─────────────────────────────────────────────
   Applications page — industry cards
   ───────────────────────────────────────────── */
.ind-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.ind {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform .4s var(--ease-out), border-color .3s ease, box-shadow .3s ease;
  position: relative;
  overflow: hidden;
}
.ind:hover { transform: translateY(-4px); border-color: var(--line-accent); box-shadow: var(--shadow); }
.ind .ind-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--accent-bg); color: var(--accent); display: grid; place-items: center; }
.ind .ind-icon svg { width: 28px; height: 28px; }
.ind h3 { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; letter-spacing: -.015em; color: var(--ink); }
.ind .summary { font-size: .95rem; color: var(--ink-dim); line-height: 1.6; }
.ind .reqs { padding-top: 1rem; border-top: 1px solid var(--line); margin-top: auto; display: grid; gap: .6rem; }
.ind .req { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; }
.ind .req .k { color: var(--ink-dim); text-transform: uppercase; }
.ind .req .v { color: var(--ink); font-weight: 500; font-family: var(--font-display); }
.ind .req .v.accent { color: var(--accent); }

.case-row {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
  transition: background .3s ease, padding .3s var(--ease-out);
}
.case-row:hover { background: var(--bg-cool); padding-left: 1rem; padding-right: 1rem; }
.case-row .c-date { font-family: var(--font-mono); font-size: 11px; color: var(--ink-dim); letter-spacing: .06em; line-height: 1.6; }
.case-row .c-date .loc { color: var(--accent); font-weight: 500; display: block; }
.case-row .c-body h4 { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; letter-spacing: -.015em; color: var(--ink); margin-bottom: .35rem; }
.case-row .c-body p { font-size: .92rem; color: var(--ink-dim); line-height: 1.55; max-width: 56ch; }
.case-row .c-meta { display: flex; gap: 1rem; align-items: baseline; font-family: var(--font-mono); font-size: 11px; color: var(--ink-dim); letter-spacing: .06em; text-transform: uppercase; }
.case-row .c-meta .v { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--ink); letter-spacing: -.01em; text-transform: none; }

/* ─────────────────────────────────────────────
   Contact page
   ───────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 4rem; padding: 2rem 0 5rem; }

.quote-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}
.quote-form h3 { font-family: var(--font-display); font-size: 1.6rem; font-weight: 600; letter-spacing: -.02em; margin-bottom: 1.5rem; color: var(--ink); padding-bottom: 1rem; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: baseline; }
.quote-form h3 small { font-family: var(--font-mono); font-size: 10px; color: var(--accent); letter-spacing: .12em; text-transform: uppercase; }

.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-field { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.25rem; }
.form-field label { font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-dim); font-weight: 500; }
.form-field input, .form-field select, .form-field textarea {
  font-family: var(--font-display);
  font-size: 15px;
  padding: .85rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  outline: 0;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
  width: 100%;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-bg);
}
.form-field textarea { resize: vertical; min-height: 120px; line-height: 1.55; }

.form-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 1.5rem; border-top: 1px solid var(--line); flex-wrap: wrap; gap: 1rem; }
.form-foot .note { font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; color: var(--ink-dim); max-width: 40ch; line-height: 1.6; }

/* Info cards */
.info-cards { display: flex; flex-direction: column; gap: 1rem; }
.info-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 1.5rem; transition: border-color .3s ease, box-shadow .3s ease; }
.info-card:hover { border-color: var(--line-accent); box-shadow: var(--shadow-sm); }
.info-card .ic-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.info-card .ic-head .lab { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 500; }
.info-card .ic-head .icon { width: 32px; height: 32px; border-radius: 8px; background: var(--accent-bg); color: var(--accent); display: grid; place-items: center; }
.info-card .ic-head .icon svg { width: 18px; height: 18px; }
.info-card h4 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 600; letter-spacing: -.015em; margin-bottom: .35rem; color: var(--ink); }
.info-card a { font-family: var(--font-display); font-size: 1.1rem; color: var(--ink); font-weight: 500; border-bottom: 1px solid var(--line-strong); padding-bottom: 2px; transition: color .2s ease, border-color .2s ease; display: inline-block; }
.info-card a:hover { color: var(--accent); border-color: var(--accent); }
.info-card p { font-size: .9rem; color: var(--ink-dim); line-height: 1.55; margin-top: .5rem; }

/* ─────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .calc-body { grid-template-columns: 1fr; gap: 1.5rem; }
  .room-chips { grid-template-columns: repeat(5, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .cat.hero { grid-column: 1 / -1; grid-template-columns: 1fr; gap: 1.5rem; padding: 1.75rem; min-height: auto; }
  .cat.hero .preview { aspect-ratio: 16 / 9; min-height: auto; }
  .cat.hero h3 { font-size: 1.6rem; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .apps-grid { grid-template-columns: repeat(3, 1fr); }
  .dealer-cta { grid-template-columns: 1fr; gap: 2rem; padding: 2rem; }
  .sound-row { grid-template-columns: 100px 1fr 70px; }
  .sound-row .context { display: none; }
  .prod-row { grid-template-columns: 1fr 2fr; gap: 1.5rem; }
  .prod-meta, .prod-go { grid-column: 1 / -1; }
  .prod-meta { flex-direction: row; align-items: center; justify-content: space-between; padding-top: 1rem; border-top: 1px solid var(--line); }
  .tech-layout, .tech-layout.reverse { grid-template-columns: 1fr; gap: 2.5rem; direction: ltr; }
  .ind-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .hero-stats-row { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .case-row { grid-template-columns: 1fr; gap: .75rem; }
  .case-row .c-meta { order: -1; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-actions .btn-primary { display: none; }
  .burger { display: inline-flex; }
  .brand-name .tag { display: none; }
  .hero { padding-top: calc(var(--nav-h) + 2rem); padding-bottom: 3rem; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
  .cat-grid { grid-template-columns: 1fr; }
  .cat.hero { grid-column: 1; }
  .calc-widget { padding: 1.5rem; }
  .calc-widget .calc-header { flex-direction: column; align-items: start; }
  .room-chips { grid-template-columns: repeat(3, 1fr); }
  .result-number { font-size: 2.8rem; }
  .tech-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr 1fr; }
  .sound-row { grid-template-columns: 80px 1fr 60px; gap: .75rem; padding: 1rem; }
  .form-grid-2 { grid-template-columns: 1fr; }
  .hero-stats-row { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .certs-list { gap: 1.25rem; }
  .spec-matrix { grid-template-columns: 1fr 1fr; gap: .75rem; }
}