/* ============================================================
   IOTI — One Ecosystem. Endless Reach.
   Design tokens: graphite-blueprint base, signal amber + signal
   teal accents (drawn from hardware status LEDs / PCB traces).
   ============================================================ */

:root {
  --bg: #0C110F;
  --bg-alt: #12211B;
  --bg-panel: #141B18;
  --ink: #EDEFE9;
  --ink-dim: #9CAA9F;
  --ink-faint: #62716A;
  --line: #263029;
  --line-soft: #1B2420;
  --amber: #FF9E1B;
  --amber-dim: #B87415;
  --teal: #57D9C9;
  --teal-dim: #2E8A7F;
  --danger: #E8654A;

  --font-display: "Space Grotesk", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --container: 1180px;
  --radius: 2px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* -------------------- Typography -------------------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--amber);
  display: inline-block;
}

p { color: var(--ink-dim); margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.lede {
  font-size: 19px;
  line-height: 1.65;
  color: var(--ink-dim);
  max-width: 54ch;
}

::selection { background: var(--amber); color: #14100A; }

/* Focus visibility */
a:focus-visible,
button:focus-visible,
.video-card:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* -------------------- Nav -------------------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(12, 17, 15, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img { height: 30px; width: auto; }

.nav-logo-word {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.nav-links a {
  color: var(--ink-dim);
  transition: color 0.15s ease;
  position: relative;
}
.nav-links a:hover { color: var(--ink); }

.nav-cta {
  border: 1px solid var(--amber-dim);
  color: var(--amber) !important;
  padding: 9px 18px;
  font-family: var(--font-mono);
}
.nav-cta:hover {
  background: var(--amber);
  color: #14100A !important;
  border-color: var(--amber);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  color: var(--ink);
  width: 40px;
  height: 40px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* -------------------- Hero -------------------- */

.hero {
  position: relative;
  padding: 168px 0 96px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(40px, 5.4vw, 68px);
  line-height: 1.04;
  margin-bottom: 26px;
}

.hero h1 em {
  font-style: normal;
  color: var(--amber);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 15px 26px;
  border: 1px solid var(--line);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: all 0.15s ease;
  background: none;
  color: var(--ink);
}

.btn-primary {
  background: var(--amber);
  border-color: var(--amber);
  color: #14100A;
  font-weight: 500;
}
.btn-primary:hover { background: #FFB44A; border-color: #FFB44A; }

.btn-ghost:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line-soft);
}

.hero-stat .num {
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--teal);
  display: block;
}
.hero-stat .lbl {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-diagram {
  position: relative;
}

.hero-diagram svg { width: 100%; height: auto; }

/* -------------------- Sections -------------------- */

section { padding: 108px 0; }

.section-head {
  max-width: 640px;
  margin-bottom: 64px;
}

.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.14;
}

.band-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

/* -------------------- Ecosystem layers -------------------- */

.layers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.layer {
  background: var(--bg);
  padding: 40px 34px;
  position: relative;
}

.layer-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 20px;
}

.layer h3 {
  font-size: 22px;
  margin-bottom: 14px;
}

.layer p { font-size: 14.5px; margin-bottom: 22px; }

.layer-devices {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-soft);
}

.layer-devices li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-dim);
  padding: 7px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.layer-devices li span:last-child {
  color: var(--ink-faint);
  text-align: right;
}

/* -------------------- Industries -------------------- */

.industries {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.industry {
  background: var(--bg-alt);
  padding: 30px 22px;
  min-height: 168px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.industry .idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
}

.industry h4 {
  font-size: 15.5px;
  line-height: 1.3;
  margin-top: 18px;
}

/* -------------------- Videos -------------------- */

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.video-card {
  position: relative;
  border: 1px solid var(--line);
  background: #000;
  cursor: pointer;
  display: block;
  width: 100%;
  padding: 0;
}

.video-card .frame {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.video-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.72;
  transition: opacity 0.2s ease, transform 0.4s ease;
}

.video-card:hover img { opacity: 0.5; transform: scale(1.02); }

.video-card video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
  background: #000;
}

.video-card.playing img { display: none; }
.video-card.playing video { display: block; }
.video-card.playing .play-btn,
.video-card.playing .video-meta { display: none; }

.play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 64px; height: 64px;
  border-radius: 50%;
  border: 1px solid var(--amber);
  background: rgba(12,17,15,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, background 0.15s ease;
}

.video-card:hover .play-btn {
  transform: translate(-50%, -50%) scale(1.08);
  background: var(--amber);
}

.video-card:hover .play-btn svg { fill: #14100A; }

.play-btn svg { width: 18px; height: 18px; fill: var(--amber); margin-left: 3px; }

.video-meta {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 18px 20px;
  background: linear-gradient(0deg, rgba(0,0,0,0.82), transparent);
  text-align: left;
}

.video-meta .eyebrow { margin-bottom: 6px; color: var(--teal); }
.video-meta .eyebrow::before { background: var(--teal); }
.video-meta h4 { font-size: 17px; color: #fff; }

/* -------------------- CTA band -------------------- */

.cta-band {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 90px 0;
  text-align: center;
}

.cta-band h2 {
  font-size: clamp(30px, 4vw, 46px);
  max-width: 760px;
  margin: 0 auto 30px;
  line-height: 1.12;
}

.cta-band .btn-row {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* -------------------- Contact -------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-list li {
  border-top: 1px solid var(--line-soft);
  padding: 24px 0;
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  align-items: baseline;
}
.contact-list li:last-child { border-bottom: 1px solid var(--line-soft); }

.contact-list .k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact-list .v {
  font-size: 17px;
  color: var(--ink);
}
.contact-list .v a:hover { color: var(--teal); }

.form-field {
  margin-bottom: 20px;
}

.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: 14.5px;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--teal);
}

.form-field textarea { resize: vertical; min-height: 100px; }

/* -------------------- Footer -------------------- */

footer {
  border-top: 1px solid var(--line-soft);
  padding: 44px 0;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo img { height: 20px; }
.footer-logo span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

.footer-links {
  display: flex;
  gap: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}
.footer-links a:hover { color: var(--ink); }

/* -------------------- Reveal on scroll -------------------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* -------------------- Responsive -------------------- */

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-diagram { order: -1; max-width: 460px; margin: 0 auto 12px; }
  .layers { grid-template-columns: 1fr; }
  .industries { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .wrap { padding: 0 22px; }
  .hero { padding: 132px 0 72px; }
  section { padding: 76px 0; }
  .hero-stats { gap: 26px; flex-wrap: wrap; }
  .industries { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .industries { grid-template-columns: 1fr; }
  .contact-list li { grid-template-columns: 1fr; gap: 4px; }
}

/* Mobile nav drawer */
.nav-links.mobile-open {
  display: flex;
  position: absolute;
  top: 76px;
  left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line-soft);
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  padding: 8px 22px 20px;
}
.nav-links.mobile-open a {
  width: 100%;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

/* ============================================================
   Legal / Terms page
   ============================================================ */

.legal-header {
  padding: 156px 0 56px;
  border-bottom: 1px solid var(--line-soft);
}

.legal-header .wrap { max-width: 800px; }

.legal-header h1 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.1;
  margin-bottom: 14px;
}

.legal-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
}

.legal-meta .pill {
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  padding: 5px 12px;
}

.legal-body {
  padding: 64px 0 120px;
}

.legal-body .wrap { max-width: 800px; }

.legal-intro p { color: var(--ink-dim); font-size: 16px; margin-bottom: 1.1em; }

.legal-callout {
  border: 1px solid var(--amber);
  background: rgba(255, 158, 27, 0.07);
  padding: 26px 28px;
  margin: 40px 0 48px;
}

.legal-callout h2 {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--amber);
  margin-bottom: 18px;
}

.legal-callout .item {
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
}
.legal-callout .item:last-of-type { margin-bottom: 0; }

.legal-callout .item b {
  color: var(--ink);
  font-weight: 600;
}

.legal-callout .fine {
  margin-top: 16px;
  font-size: 13px;
  font-style: italic;
  color: var(--ink-faint);
}

.legal-toc {
  border: 1px solid var(--line);
  padding: 22px 26px;
  margin-bottom: 56px;
  columns: 2;
  column-gap: 32px;
}
.legal-toc a {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-dim);
  padding: 6px 0;
  break-inside: avoid;
}
.legal-toc a:hover { color: var(--teal); }

.legal-section {
  margin-top: 52px;
  padding-top: 8px;
  scroll-margin-top: 96px;
}

.legal-section h2 {
  font-family: var(--font-display);
  font-size: 21px;
  color: var(--ink);
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

.legal-clause {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 4px 14px;
  margin-bottom: 16px;
  align-items: baseline;
}

.legal-clause .cnum {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
}

.legal-clause .ctext {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-dim);
}
.legal-clause .ctext b { color: var(--ink); font-weight: 600; }

.legal-sublist {
  grid-column: 2 / 3;
  margin: 6px 0 0;
  padding-left: 0;
  list-style: none;
}
.legal-sublist li {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-dim);
  padding: 5px 0 5px 26px;
  position: relative;
}
.legal-sublist li .letter {
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

.legal-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

@media (max-width: 700px) {
  .legal-clause { grid-template-columns: 1fr; }
  .legal-clause .cnum { font-size: 12px; }
  .legal-toc { columns: 1; }
}