/* =========================================================
   TERALAMP - Daylight Technology Design System
   THE LIGHT FIELD
   ========================================================= */

:root {
  /* Brand palette */
  --forest: #12352A;
  --pine: #1D5140;
  --amber: #F4B942;
  --mint: #6FD6A5;
  --warm-white: #FAF9F3;
  --bg: #F1F4EE;
  --text: #17221D;
  --muted: #6D7972;
  --sky: #8FD8D2;

  /* Derived */
  --forest-90: rgba(18, 53, 42, 0.9);
  --forest-70: rgba(18, 53, 42, 0.7);
  --forest-12: rgba(18, 53, 42, 0.12);
  --forest-06: rgba(18, 53, 42, 0.06);
  --amber-40: rgba(244, 185, 66, 0.4);
  --amber-20: rgba(244, 185, 66, 0.2);
  --amber-10: rgba(244, 185, 66, 0.1);
  --mint-20: rgba(111, 214, 165, 0.2);
  --sky-25: rgba(143, 216, 210, 0.25);
  --white: #FFFFFF;

  /* Type */
  --font-display: "Manrope", "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "Plus Jakarta Sans", "Inter", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;

  /* Layout */
  --max: 1180px;
  --nav-h: 72px;
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow-soft: 0 10px 40px rgba(18, 53, 42, 0.08);
  --shadow-nav: 0 8px 32px rgba(18, 53, 42, 0.1);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Light Field interactive */
  --lf-x: 50%;
  --lf-y: 42%;
  --lf-intensity: 0.55;
  --lf-scale: 1;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.skip-link:focus {
  position: fixed !important;
  left: 1rem !important;
  top: 1rem !important;
  width: auto !important;
  height: auto !important;
  overflow: visible !important;
  z-index: 200;
  padding: 0.75rem 1.1rem;
  background: var(--forest);
  color: var(--warm-white);
  border-radius: 999px;
  font-weight: 650;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* ---------- Utilities ---------- */
.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pine);
}

.eyebrow::before {
  content: "";
  width: 1.25rem;
  height: 1px;
  background: var(--amber);
}

.section {
  padding: clamp(4.5rem, 9vw, 7.5rem) 0;
  position: relative;
}

.section-dark {
  background: var(--forest);
  color: var(--warm-white);
}

.section-warm {
  background: var(--warm-white);
}

.section-soft {
  background: var(--bg);
}

.section-head {
  max-width: 42rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head.centered {
  margin-inline: auto;
  text-align: center;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.2vw, 3.25rem);
  font-weight: 650;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--forest);
}

.section-dark .section-head h2 {
  color: var(--warm-white);
}

.section-head p {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.section-dark .section-head p {
  color: rgba(250, 249, 243, 0.72);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), box-shadow 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--forest);
  color: var(--warm-white);
  box-shadow: 0 8px 24px rgba(18, 53, 42, 0.22);
}

.btn-primary:hover {
  background: var(--pine);
  transform: translateY(-1px);
}

.btn-amber {
  background: var(--amber);
  color: var(--forest);
  box-shadow: 0 8px 24px var(--amber-40);
}

.btn-amber:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--forest);
  border: 1px solid var(--forest-12);
}

.btn-ghost:hover {
  border-color: var(--pine);
  background: var(--forest-06);
}

.btn-ghost-light {
  background: transparent;
  color: var(--warm-white);
  border: 1px solid rgba(250, 249, 243, 0.28);
}

.btn-ghost-light:hover {
  background: rgba(250, 249, 243, 0.08);
  border-color: rgba(250, 249, 243, 0.5);
}

.btn-arrow::after {
  content: "→";
  transition: transform 0.3s var(--ease);
}

.btn-arrow:hover::after {
  transform: translateX(3px);
}

/* ---------- Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 1.25rem 0;
  pointer-events: none;
}

.nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100%, 1240px);
  margin-inline: auto;
  min-height: var(--nav-h);
  padding: 0.65rem 0.85rem 0.65rem 1.1rem;
  background: rgba(250, 249, 243, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(18, 53, 42, 0.08);
  border-radius: 999px;
  box-shadow: var(--shadow-nav);
  transition: box-shadow 0.4s var(--ease), background 0.4s var(--ease);
}

.site-header.scrolled .nav {
  box-shadow: 0 12px 40px rgba(18, 53, 42, 0.14);
  background: rgba(250, 249, 243, 0.96);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}

.logo-mark {
  width: 36px;
  height: 36px;
}

.logo-word {
  font-family: var(--font-display);
  font-weight: 750;
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  color: var(--forest);
}

.logo-word .a-beam {
  display: inline-block;
  position: relative;
  width: 0.72em;
  text-align: center;
}

.logo-word .a-beam::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.15em;
  width: 1px;
  height: 0.55em;
  background: linear-gradient(to top, transparent, var(--amber));
  transform: translateX(-50%);
  opacity: 0.7;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-links a {
  padding: 0.55rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 550;
  color: var(--muted);
  border-radius: 999px;
  transition: color 0.25s, background 0.25s;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--forest);
  background: var(--forest-06);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-actions .btn {
  min-height: 2.6rem;
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--forest-12);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 14px;
  height: 1.5px;
  background: var(--forest);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100svh - 2rem);
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(3rem, 6vw, 5rem);
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 70% 35%, var(--amber-10), transparent 60%),
    radial-gradient(ellipse 50% 40% at 15% 80%, var(--sky-25), transparent 55%),
    linear-gradient(165deg, var(--warm-white) 0%, var(--bg) 55%, #E8EEE6 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  min-height: min(78vh, 760px);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 34rem;
}

.hero h1 {
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.25rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.045em;
  color: var(--forest);
}

.hero-sub {
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 550;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--pine);
}

.hero-desc {
  margin-top: 1rem;
  color: var(--muted);
  max-width: 32rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-tagline {
  margin-top: 2.5rem;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Hero visual - Light Field + Product */
.hero-stage {
  position: relative;
  height: min(72vh, 680px);
  min-height: 480px;
  border-radius: 28px;
  overflow: hidden;
  background:
    linear-gradient(180deg, #DCE6DF 0%, #C8D6CB 40%, #A8BEB2 100%);
  border: 1px solid rgba(18, 53, 42, 0.08);
  box-shadow: var(--shadow-soft);
  isolation: isolate;
}

.hero-architecture {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 12%, rgba(18, 53, 42, 0.04) 12%, rgba(18, 53, 42, 0.04) 12.4%, transparent 12.4%),
    linear-gradient(90deg, transparent 88%, rgba(18, 53, 42, 0.04) 88%, rgba(18, 53, 42, 0.04) 88.4%, transparent 88.4%),
    linear-gradient(180deg, transparent 18%, rgba(250, 249, 243, 0.35) 18%, rgba(250, 249, 243, 0.35) 18.5%, transparent 18.5%);
  pointer-events: none;
}

.light-field {
  position: absolute;
  left: var(--lf-x);
  top: var(--lf-y);
  width: 340px;
  height: 340px;
  transform: translate(-50%, -50%) scale(var(--lf-scale));
  border-radius: 50%;
  background:
    radial-gradient(circle,
      rgba(244, 185, 66, calc(0.55 * var(--lf-intensity))) 0%,
      rgba(244, 185, 66, calc(0.22 * var(--lf-intensity))) 35%,
      rgba(143, 216, 210, calc(0.12 * var(--lf-intensity))) 55%,
      transparent 72%);
  transition: transform 0.6s var(--ease-out), width 0.8s var(--ease), height 0.8s var(--ease);
  pointer-events: none;
  z-index: 1;
  will-change: transform, left, top;
}

.light-field::before,
.light-field::after {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px solid rgba(244, 185, 66, 0.25);
  animation: ring-breathe 6s var(--ease) infinite;
}

.light-field::after {
  inset: 28%;
  border-color: rgba(111, 214, 165, 0.3);
  animation-delay: -2s;
}

.light-field.active {
  --lf-intensity: 0.85;
  --lf-scale: 1.12;
}

.light-rays {
  position: absolute;
  left: 50%;
  top: 42%;
  width: 2px;
  height: 180px;
  transform: translate(-50%, -100%);
  background: linear-gradient(to top, transparent, rgba(244, 185, 66, 0.45));
  opacity: 0.6;
  z-index: 1;
  pointer-events: none;
}

.light-rays span {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 1.5px;
  height: 140px;
  background: linear-gradient(to top, transparent, rgba(244, 185, 66, 0.35));
  transform-origin: bottom center;
}

.light-rays span:nth-child(1) { transform: translateX(-50%) rotate(-18deg); height: 120px; }
.light-rays span:nth-child(2) { transform: translateX(-50%) rotate(-8deg); }
.light-rays span:nth-child(3) { transform: translateX(-50%) rotate(8deg); }
.light-rays span:nth-child(4) { transform: translateX(-50%) rotate(18deg); height: 120px; }

.lamp-product {
  position: absolute;
  left: 50%;
  bottom: 12%;
  transform: translateX(-50%);
  width: 120px;
  z-index: 3;
  filter: drop-shadow(0 20px 40px rgba(18, 53, 42, 0.25));
  animation: lamp-float 7s ease-in-out infinite;
}

.sensor-chips {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.sensor-chip {
  position: absolute;
  padding: 0.55rem 0.8rem;
  background: rgba(250, 249, 243, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(18, 53, 42, 0.08);
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(18, 53, 42, 0.1);
  font-size: 0.75rem;
  line-height: 1.3;
  opacity: 0.85;
  transition: opacity 0.4s, transform 0.5s var(--ease), box-shadow 0.4s;
}

.sensor-chip strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 600;
}

.sensor-chip em {
  font-style: normal;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--forest);
}

.sensor-chip.mint em { color: var(--pine); }
.sensor-chip.amber em { color: #B8841A; }
.sensor-chip.sky em { color: #2A7A74; }

.sensor-chip[data-pos="1"] { top: 14%; left: 8%; }
.sensor-chip[data-pos="2"] { top: 18%; right: 8%; }
.sensor-chip[data-pos="3"] { top: 48%; left: 4%; }
.sensor-chip[data-pos="4"] { top: 52%; right: 5%; }
.sensor-chip[data-pos="5"] { bottom: 18%; left: 12%; }

.hero-stage.active .sensor-chip {
  opacity: 1;
  box-shadow: 0 10px 28px rgba(18, 53, 42, 0.14);
}

.hero-floor {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: 8%;
  height: 40%;
  background: linear-gradient(to top, rgba(18, 53, 42, 0.08), transparent);
  border-radius: 50% 50% 0 0 / 20% 20% 0 0;
  z-index: 0;
}

/* ---------- Intro editorial ---------- */
.intro {
  background: var(--warm-white);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: end;
}

.intro h2 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 650;
  line-height: 1.08;
  letter-spacing: -0.035em;
  color: var(--forest);
  max-width: 16ch;
}

.intro h2 span {
  display: block;
  color: var(--pine);
}

.intro-body p {
  color: var(--muted);
  font-size: 1.125rem;
  max-width: 28rem;
}

.pillars {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.pillar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.2rem;
  background: var(--bg);
  border: 1px solid var(--forest-12);
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--forest);
}

.pillar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
}

.pillar:nth-child(2) i { background: var(--sky); }
.pillar:nth-child(3) i { background: var(--mint); }

/* ---------- Hardware products ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.product-card {
  position: relative;
  padding: 1.5rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
  overflow: hidden;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.product-viz {
  position: relative;
  height: 220px;
  margin-bottom: 1.25rem;
  border-radius: var(--radius-sm);
  background:
    radial-gradient(circle at 50% 40%, var(--amber-10), transparent 55%),
    linear-gradient(180deg, #E6EDE7, #D4DED6);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.product-status {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.65rem;
  background: rgba(250, 249, 243, 0.9);
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  color: var(--pine);
}

.product-status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px var(--mint-20);
  animation: pulse-dot 2.4s ease infinite;
}

.product-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--forest);
}

.product-card > p {
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.specs {
  margin: 1.1rem 0 1.35rem;
  display: grid;
  gap: 0.45rem;
}

.specs li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--forest-06);
  font-size: 0.8125rem;
}

.specs li span:first-child { color: var(--muted); }
.specs li span:last-child {
  font-weight: 600;
  color: var(--forest);
  font-family: var(--font-display);
}

/* ---------- Room lighting ---------- */
.room-section {
  background: var(--warm-white);
}

.room-layout {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 1.5rem;
  align-items: stretch;
}

.room-viz {
  position: relative;
  min-height: 420px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, #B8C9BE 0%, #9BB0A4 45%, #7A9486 100%);
  overflow: hidden;
  border: 1px solid var(--forest-12);
}

.room-window {
  position: absolute;
  top: 12%;
  right: 10%;
  width: 28%;
  height: 42%;
  background: linear-gradient(160deg, #C9E8F0, #8FD8D2 60%, #E8F4C8);
  border: 8px solid rgba(250, 249, 243, 0.55);
  border-radius: 4px;
  opacity: 0.85;
}

.room-floor {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 32%;
  background: linear-gradient(to top, rgba(18, 53, 42, 0.18), rgba(18, 53, 42, 0.04));
}

.room-lamp {
  position: absolute;
  left: 42%;
  bottom: 28%;
  width: 70px;
  transform: translateX(-50%);
  z-index: 2;
}

.room-field {
  position: absolute;
  left: 42%;
  top: 48%;
  width: 220px;
  height: 220px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 185, 66, 0.35), transparent 70%);
  animation: field-pulse 5s ease-in-out infinite;
}

.room-metrics {
  display: grid;
  gap: 0.75rem;
}

.metric-tile {
  padding: 1.1rem 1.25rem;
  background: var(--bg);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius-sm);
}

.metric-tile label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.metric-tile strong {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--forest);
  letter-spacing: -0.02em;
}

.metric-bar {
  margin-top: 0.65rem;
  height: 4px;
  background: var(--forest-06);
  border-radius: 999px;
  overflow: hidden;
}

.metric-bar i {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  background: linear-gradient(90deg, var(--amber), var(--mint));
  border-radius: inherit;
  transition: width 1.2s var(--ease);
}

/* ---------- IoT Platform ---------- */
.iot-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.35rem;
  margin-top: 1rem;
}

.iot-node {
  position: relative;
  min-width: 140px;
  padding: 1.1rem 1.25rem;
  text-align: center;
  background: rgba(250, 249, 243, 0.06);
  border: 1px solid rgba(250, 249, 243, 0.14);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(6px);
}

.iot-node strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.iot-node span {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: rgba(250, 249, 243, 0.55);
}

.iot-arrow {
  width: 36px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  position: relative;
  flex-shrink: 0;
}

.iot-arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  transform: translateY(-50%);
  animation: pulse-travel 2.8s ease-in-out infinite;
}

.iot-flow {
  margin-top: 3rem;
  height: 120px;
  position: relative;
}

/* ---------- Environmental dashboard ---------- */
.gauges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.gauge-card {
  padding: 1.5rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
  text-align: center;
}

.gauge {
  --p: 60;
  width: 140px;
  height: 140px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background:
    radial-gradient(circle closest-side, var(--warm-white) 78%, transparent 79% 100%),
    conic-gradient(var(--amber) calc(var(--p) * 1%), var(--forest-06) 0);
  display: grid;
  place-items: center;
  transition: background 1s var(--ease);
}

.gauge.mint {
  background:
    radial-gradient(circle closest-side, var(--warm-white) 78%, transparent 79% 100%),
    conic-gradient(var(--mint) calc(var(--p) * 1%), var(--forest-06) 0);
}

.gauge.sky {
  background:
    radial-gradient(circle closest-side, var(--warm-white) 78%, transparent 79% 100%),
    conic-gradient(var(--sky) calc(var(--p) * 1%), var(--forest-06) 0);
}

.gauge-value {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--forest);
  letter-spacing: -0.02em;
}

.gauge-card h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--muted);
}

/* ---------- Energy ---------- */
.energy-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.compare-panel {
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--forest-12);
  background: var(--warm-white);
}

.compare-panel.before {
  opacity: 0.85;
}

.compare-panel.after {
  background: linear-gradient(160deg, var(--warm-white), #EEF6F0);
  border-color: rgba(111, 214, 165, 0.35);
}

.compare-panel h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.compare-panel strong {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--forest);
  letter-spacing: -0.02em;
}

.energy-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.energy-stat {
  padding: 1.5rem;
  background: var(--forest);
  color: var(--warm-white);
  border-radius: var(--radius);
  text-align: center;
}

.energy-stat em {
  display: block;
  font-style: normal;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -0.03em;
}

.energy-stat span {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.875rem;
  color: rgba(250, 249, 243, 0.7);
}

.energy-note {
  margin-top: 1rem;
  font-size: 0.8125rem;
  color: var(--muted);
  font-style: italic;
}

.energy-flow {
  margin-top: 2.5rem;
  padding: 2rem;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--forest-12);
  overflow: hidden;
}

/* ---------- Building ---------- */
.building-wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
}

.building-viz {
  position: relative;
  min-height: 480px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #1A4034, #12352A 70%, #0D261E);
  overflow: hidden;
  border: 1px solid rgba(250, 249, 243, 0.08);
}

.building-structure {
  position: absolute;
  left: 50%;
  bottom: 8%;
  transform: translateX(-50%);
  width: min(70%, 280px);
  display: grid;
  gap: 6px;
}

.floor {
  position: relative;
  height: 72px;
  background: rgba(250, 249, 243, 0.06);
  border: 1px solid rgba(250, 249, 243, 0.1);
  border-radius: 6px;
  overflow: hidden;
}

.floor-windows {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  padding: 12px 14px;
  height: 100%;
}

.floor-windows i {
  background: rgba(244, 185, 66, 0.15);
  border-radius: 2px;
  transition: background 0.8s;
}

.floor.active .floor-windows i {
  background: rgba(244, 185, 66, 0.55);
  animation: window-flicker 4s ease-in-out infinite;
}

.floor.active .floor-windows i:nth-child(2n) { animation-delay: 0.4s; }
.floor.active .floor-windows i:nth-child(3n) { animation-delay: 1.1s; background: rgba(143, 216, 210, 0.4); }

.floor.low .floor-windows i:nth-child(odd) {
  background: rgba(244, 185, 66, 0.35);
}

.floor.opt .floor-windows i {
  background: rgba(111, 214, 165, 0.4);
}

.floor.maint .floor-windows i:nth-child(3) {
  background: rgba(244, 185, 66, 0.8);
  box-shadow: 0 0 8px var(--amber-40);
}

.building-spine {
  position: absolute;
  left: 50%;
  top: 12%;
  bottom: 8%;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--sky), var(--amber), transparent);
  transform: translateX(-50%);
  opacity: 0.5;
}

.building-spine::before {
  content: "";
  position: absolute;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  transform: translateX(-50%);
  animation: spine-travel 5s linear infinite;
}

.floor-status {
  display: grid;
  gap: 0.75rem;
}

.floor-status article {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius-sm);
}

.floor-status h3 {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--forest);
}

.badge {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--forest-06);
  color: var(--pine);
}

.badge.active { background: var(--mint-20); color: var(--pine); }
.badge.low { background: var(--sky-25); color: #2A7A74; }
.badge.opt { background: var(--amber-10); color: #9A6F12; }
.badge.maint { background: rgba(244, 185, 66, 0.25); color: #8A5E0A; }

/* ---------- Smart city ---------- */
.city-section {
  background: linear-gradient(180deg, #0F2A22 0%, #12352A 40%, #1A4034 100%);
  color: var(--warm-white);
  overflow: hidden;
}

.city-viz {
  position: relative;
  height: clamp(320px, 50vw, 480px);
  margin-top: 2rem;
  border-radius: var(--radius);
  background:
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(244, 185, 66, 0.15), transparent 60%),
    linear-gradient(180deg, #1E4A3C 0%, #0F2A22 100%);
  overflow: hidden;
  border: 1px solid rgba(250, 249, 243, 0.08);
}

.city-sky {
  position: absolute;
  inset: 0 0 40% 0;
  background: linear-gradient(180deg, #2A5548, transparent);
}

.city-sky::after {
  content: "";
  position: absolute;
  top: 18%;
  right: 18%;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: radial-gradient(circle, #F8D98A, transparent 70%);
  opacity: 0.7;
}

.city-ground {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 28%;
  background: #0A1F18;
}

.city-building {
  position: absolute;
  bottom: 26%;
  background: #163C30;
  border: 1px solid rgba(250, 249, 243, 0.06);
}

.city-building .win {
  position: absolute;
  inset: 10% 12%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
}

.city-building .win i {
  background: rgba(244, 185, 66, 0.2);
  border-radius: 1px;
}

.city-node {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 16px var(--amber-40), 0 0 4px var(--amber);
  z-index: 3;
  animation: node-glow 3s ease-in-out infinite;
}

.city-link {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(143, 216, 210, 0.5), transparent);
  transform-origin: left center;
  z-index: 2;
  opacity: 0.6;
}

/* ---------- CleanTech pillars ---------- */
.cleantech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.cleantech-card {
  padding: 2rem 1.75rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
}

.cleantech-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  color: var(--forest);
}

.cleantech-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--forest);
  margin-bottom: 0.65rem;
}

.cleantech-card p {
  color: var(--muted);
  font-size: 0.975rem;
}

/* ---------- Architecture flow ---------- */
.arch-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.arch-step {
  padding: 1rem 1.15rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius-xs);
  text-align: center;
  min-width: 110px;
}

.arch-step strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--forest);
}

.arch-line {
  width: 28px;
  height: 1px;
  background: var(--sky);
  position: relative;
  overflow: hidden;
}

.arch-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--amber);
  transform: translateX(-100%);
  animation: signal-dash 2s ease-in-out infinite;
}

/* ---------- Control Center ---------- */
.dashboard {
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.dash-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--forest-06);
  background: linear-gradient(90deg, var(--bg), var(--warm-white));
}

.dash-header h3 {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--forest);
}

.dash-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.dash-stat {
  padding: 0.4rem 0.75rem;
  background: var(--forest-06);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 650;
  color: var(--pine);
}

.dash-body {
  display: grid;
  grid-template-columns: 200px 1fr 240px;
  min-height: 380px;
}

.dash-nav {
  padding: 1rem;
  border-right: 1px solid var(--forest-06);
  background: var(--bg);
}

.dash-nav button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  font-weight: 550;
  color: var(--muted);
  transition: background 0.25s, color 0.25s;
}

.dash-nav button:hover,
.dash-nav button.active {
  background: var(--warm-white);
  color: var(--forest);
}

.dash-map {
  position: relative;
  padding: 1.5rem;
  background:
    linear-gradient(var(--forest-06) 1px, transparent 1px),
    linear-gradient(90deg, var(--forest-06) 1px, transparent 1px);
  background-size: 40px 40px;
}

.room-cell {
  position: absolute;
  padding: 0.75rem;
  background: rgba(250, 249, 243, 0.95);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}

.room-cell:hover,
.room-cell:focus-visible {
  border-color: var(--amber);
  box-shadow: 0 8px 24px var(--amber-20);
  transform: translateY(-2px);
  z-index: 2;
}

.room-cell strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--forest);
}

.room-cell span {
  font-size: 0.7rem;
  color: var(--muted);
}

.dash-detail {
  padding: 1.25rem;
  border-left: 1px solid var(--forest-06);
  background: var(--bg);
}

.dash-detail h4 {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--forest);
  margin-bottom: 1rem;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--forest-06);
  font-size: 0.875rem;
}

.detail-row span:first-child { color: var(--muted); }
.detail-row span:last-child {
  font-weight: 650;
  color: var(--forest);
  font-family: var(--font-display);
}

/* ---------- Automation ---------- */
.rules {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.rule-card {
  padding: 1.5rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
}

.rule-label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.rule-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0.25rem 0.25rem 0.25rem 0;
  padding: 0.45rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--forest-12);
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--forest);
}

.rule-chip.when { border-color: var(--sky); background: rgba(143, 216, 210, 0.15); }
.rule-chip.then { border-color: var(--amber); background: var(--amber-10); }

.rule-op {
  display: block;
  margin: 0.65rem 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ---------- Applications ---------- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.app-card {
  position: relative;
  min-height: 200px;
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s;
}

.app-card::before {
  content: "";
  position: absolute;
  inset: auto -20% -40% auto;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--amber-10), transparent 70%);
  pointer-events: none;
}

.app-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.app-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--forest);
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.app-card p {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 28ch;
}

/* ---------- Ecosystem ---------- */
.ecosystem {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.eco-center {
  position: relative;
  z-index: 2;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--forest);
  color: var(--warm-white);
  display: grid;
  place-items: center;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  box-shadow: 0 0 0 24px var(--amber-10), 0 0 0 48px rgba(143, 216, 210, 0.08);
}

.eco-orbit {
  position: absolute;
  inset: 10%;
  border: 1px dashed rgba(18, 53, 42, 0.12);
  border-radius: 50%;
  pointer-events: none;
}

.eco-node {
  position: absolute;
  padding: 0.65rem 1rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--forest);
  box-shadow: 0 6px 20px rgba(18, 53, 42, 0.06);
  z-index: 2;
}

.eco-node[data-i="0"] { top: 8%; left: 50%; transform: translateX(-50%); }
.eco-node[data-i="1"] { top: 28%; right: 12%; }
.eco-node[data-i="2"] { bottom: 28%; right: 14%; }
.eco-node[data-i="3"] { bottom: 8%; left: 50%; transform: translateX(-50%); }
.eco-node[data-i="4"] { bottom: 28%; left: 12%; }
.eco-node[data-i="5"] { top: 28%; left: 10%; }
.eco-node[data-i="6"] { top: 50%; right: 4%; transform: translateY(-50%); }

/* ---------- Mobile app ---------- */
.phone-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: center;
}

.phone {
  width: 280px;
  margin-inline: auto;
  padding: 0.75rem;
  background: var(--forest);
  border-radius: 36px;
  box-shadow: 0 24px 60px rgba(18, 53, 42, 0.3);
}

.phone-screen {
  background: var(--warm-white);
  border-radius: 28px;
  padding: 1.5rem 1.15rem 1.75rem;
  min-height: 480px;
}

.phone-notch {
  width: 80px;
  height: 6px;
  margin: 0 auto 1.25rem;
  background: var(--forest-12);
  border-radius: 999px;
}

.phone-screen h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.phone-screen h4 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--forest);
  margin: 0.35rem 0 1.25rem;
}

.phone-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.phone-metric {
  padding: 0.85rem;
  background: var(--bg);
  border-radius: var(--radius-xs);
}

.phone-metric label {
  display: block;
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 650;
}

.phone-metric strong {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--forest);
}

.phone-controls {
  display: grid;
  gap: 0.55rem;
}

.phone-ctrl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0.9rem;
  background: var(--forest-06);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--forest);
}

.phone-ctrl i {
  width: 28px;
  height: 14px;
  border-radius: 999px;
  background: var(--mint);
  position: relative;
}

.phone-ctrl i::after {
  content: "";
  position: absolute;
  right: 2px;
  top: 2px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warm-white);
}

/* ---------- Developer API ---------- */
.api-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
}

.code-panel {
  padding: 1.5rem;
  background: #0D261E;
  color: #D8E6DE;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  overflow-x: auto;
}

.code-panel .cmt { color: #6D7972; }
.code-panel .fn { color: var(--mint); }
.code-panel .str { color: var(--amber); }
.code-panel .num { color: var(--sky); }

.live-env {
  position: relative;
  padding: 1.75rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
  overflow: hidden;
}

.live-env .mini-field {
  position: absolute;
  right: -20%;
  bottom: -30%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--amber-20), transparent 70%);
  animation: field-pulse 4s ease-in-out infinite;
}

.live-env h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 1.25rem;
  position: relative;
}

.live-row {
  display: flex;
  justify-content: space-between;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--forest-06);
  position: relative;
}

.live-row span:last-child {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--forest);
}

/* ---------- Reliability / Privacy ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-item {
  padding: 1.35rem 1.25rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius-sm);
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.feature-item .icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg);
  display: grid;
  place-items: center;
  color: var(--pine);
}

.feature-item h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--forest);
  margin-bottom: 0.25rem;
}

.feature-item p {
  font-size: 0.875rem;
  color: var(--muted);
}

.privacy-section {
  background: var(--warm-white);
}

/* ---------- Case study ---------- */
.case {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding: 2.5rem;
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius);
}

.case-label {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.7rem;
  background: var(--amber-10);
  color: #9A6F12;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  border-radius: 999px;
}

.case h3 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 650;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--forest);
  margin-bottom: 1.5rem;
}

.case-compare {
  display: grid;
  gap: 1rem;
}

.case-compare article {
  padding: 1rem 1.15rem;
  background: var(--bg);
  border-radius: var(--radius-xs);
}

.case-compare h4 {
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  align-content: center;
}

.case-metric {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--forest);
  color: var(--warm-white);
  border-radius: var(--radius-sm);
}

.case-metric em {
  display: block;
  font-style: normal;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--amber);
}

.case-metric span {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(250, 249, 243, 0.7);
}

.case-note {
  grid-column: 1 / -1;
  font-size: 0.8125rem;
  color: var(--muted);
  font-style: italic;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 760px;
  margin-inline: auto;
  display: grid;
  gap: 0.65rem;
}

.faq-item {
  background: var(--warm-white);
  border: 1px solid var(--forest-12);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-item button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1rem;
  color: var(--forest);
}

.faq-item button svg {
  flex-shrink: 0;
  transition: transform 0.35s var(--ease);
}

.faq-item[open] button svg,
.faq-item.is-open button svg {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s var(--ease), padding 0.35s;
  padding: 0 1.25rem;
  color: var(--muted);
  font-size: 0.975rem;
}

.faq-item.is-open .faq-answer {
  max-height: 240px;
  padding: 0 1.25rem 1.25rem;
}

/* ---------- Final CTA ---------- */
.final-cta {
  position: relative;
  padding: clamp(5rem, 12vw, 8rem) 0;
  background: var(--forest);
  color: var(--warm-white);
  text-align: center;
  overflow: hidden;
}

.final-field {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(90vw, 700px);
  height: min(90vw, 700px);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 185, 66, 0.28) 0%, rgba(244, 185, 66, 0.08) 40%, transparent 68%);
  animation: final-glow 8s ease-in-out infinite;
  pointer-events: none;
}

.final-nodes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.final-nodes span {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  opacity: 0.5;
  animation: node-glow 4s ease-in-out infinite;
}

.final-cta .container {
  position: relative;
  z-index: 2;
}

.final-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  max-width: 14ch;
  margin-inline: auto;
}

.final-cta p {
  margin: 1.25rem auto 2rem;
  max-width: 36rem;
  color: rgba(250, 249, 243, 0.72);
  font-size: 1.125rem;
}

.final-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #0D261E;
  color: rgba(250, 249, 243, 0.75);
  padding: 4rem 0 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-brand .logo-word {
  color: var(--warm-white);
  margin-bottom: 0.75rem;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 22ch;
  color: rgba(250, 249, 243, 0.5);
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--warm-white);
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  padding: 0.3rem 0;
  font-size: 0.875rem;
  color: rgba(250, 249, 243, 0.55);
  transition: color 0.25s;
}

.footer-col a:hover {
  color: var(--amber);
}

.footer-legal a {
  color: rgba(250, 249, 243, 0.45);
  transition: color 0.25s;
}

.footer-legal a:hover {
  color: var(--amber);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(250, 249, 243, 0.08);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8125rem;
  color: rgba(250, 249, 243, 0.4);
}

.footer-tag {
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Keyframes ---------- */
@keyframes ring-breathe {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.06); opacity: 1; }
}

@keyframes lamp-float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px var(--mint-20); }
  50% { box-shadow: 0 0 0 6px rgba(111, 214, 165, 0.15); }
}

@keyframes field-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
  50% { transform: translate(-50%, -50%) scale(1.08); opacity: 1; }
}

@keyframes pulse-travel {
  0% { left: 0; opacity: 0; }
  20% { opacity: 1; }
  100% { left: calc(100% - 6px); opacity: 0; }
}

@keyframes window-flicker {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

@keyframes spine-travel {
  0% { top: 0; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

@keyframes node-glow {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.35); opacity: 1; }
}

@keyframes signal-dash {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(200%); }
}

@keyframes final-glow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.85; }
  50% { transform: translate(-50%, -50%) scale(1.08); opacity: 1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1199px) {
  .nav-links { display: none; }
  .nav-actions .btn-ghost { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav {
    position: relative;
    border-radius: var(--radius);
  }

  .nav-links.open {
    display: flex;
    position: absolute;
    top: calc(100% + 0.65rem);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem;
    background: var(--warm-white);
    border: 1px solid var(--forest-12);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    z-index: 20;
  }

  .hero-grid,
  .intro-grid,
  .room-layout,
  .building-wrap,
  .phone-wrap,
  .api-grid,
  .case {
    grid-template-columns: 1fr;
  }

  .dash-body {
    grid-template-columns: 1fr;
  }

  .dash-nav {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--forest-06);
  }

  .dash-nav button { white-space: nowrap; width: auto; }

  .dash-detail { border-left: none; border-top: 1px solid var(--forest-06); }

  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .container { width: min(100% - 1.5rem, var(--max)); }

  .products-grid,
  .gauges,
  .energy-compare,
  .energy-stats,
  .cleantech-grid,
  .apps-grid,
  .feature-grid,
  .rules,
  .case-metrics {
    grid-template-columns: 1fr;
  }

  .hero-stage {
    min-height: 420px;
    height: 480px;
  }

  .sensor-chip[data-pos="3"],
  .sensor-chip[data-pos="5"] {
    display: none;
  }

  .iot-arrow { width: 100%; height: 24px; background: linear-gradient(180deg, transparent, var(--amber), transparent); }
  .iot-diagram { flex-direction: column; }
  .iot-arrow::after { right: auto; left: 50%; top: auto; bottom: 0; transform: translateX(-50%); }

  .arch-flow { flex-direction: column; }
  .arch-line { width: 2px; height: 24px; }

  .footer-top { grid-template-columns: 1fr; }

  .eco-orbit { display: none; }
  .ecosystem {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    justify-content: center;
    min-height: auto;
    padding: 1rem 0;
  }
  .eco-center { margin-bottom: 0.5rem; }
  .eco-node {
    position: static;
    transform: none !important;
  }

  .phone-wrap { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}