/* ============================================================
   Digitalnob — Digital Intelligence Design System
   ============================================================ */

:root {
  /* Brand palette */
--dn-navy: #0b1019;
    --dn-gold: #e0b879;
    --dn-silver: #b6bbc9;
    --dn-slate: #29313c;
    --dn-ivory: #fafbf5;

  /* Derived surfaces */
  --bg: var(--dn-ivory);
  --bg-elevated: #ffffff;
  --bg-dark: var(--dn-navy);
  --bg-slate: var(--dn-slate);
  --surface-line: rgba(41, 49, 60, 0.12);
  --surface-line-dark: rgba(230, 184, 121, 0.18);

  /* Text */
  --text: var(--dn-navy);
  --text-muted: #5a6473;
  --text-on-dark: var(--dn-ivory);
  --text-on-dark-muted: var(--dn-silver);
  --text-gold: var(--dn-gold);

  /* Functional */
  --success: #2f9e6a;
  --error: #d64545;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas,
    monospace;

  /* Spacing — 8px scale */
  --s-1: 0.5rem;
  --s-2: 1rem;
  --s-3: 1.5rem;
  --s-4: 2rem;
  --s-5: 3rem;
  --s-6: 4rem;
  --s-7: 6rem;
  --s-8: 8rem;

  /* Radius */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-pill: 999px;

  /* Layout */
  --container: 1240px;
  --container-wide: 1440px;
  --header-h: 76px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.3s;
  --dur: 0.5s;
  --dur-slow: 0.8s;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(11, 16, 25, 0.06);
  --shadow-md: 0 8px 30px rgba(11, 16, 25, 0.08);
  --shadow-lg: 0 24px 60px rgba(11, 16, 25, 0.14);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

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

input,
textarea,
select {
  font: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--dn-gold);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4 {
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.035em;
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 3rem);
  letter-spacing: -0.03em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  letter-spacing: -0.02em;
}

p {
  max-width: 68ch;
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 60ch;
}

.on-dark {
  color: var(--text-on-dark);
}
.on-dark h1,
.on-dark h2,
.on-dark h3,
.on-dark h4 {
  color: var(--text-on-dark);
}
.on-dark p,
.on-dark .lead {
  color: var(--text-on-dark-muted);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dn-gold);
  margin-bottom: var(--s-2);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--dn-gold);
}

.on-dark .eyebrow {
  color: var(--dn-gold);
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--s-3);
}

.container-wide {
  max-width: var(--container-wide);
}

.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
  position: relative;
}

.section-tight {
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.section-dark {
  background: var(--dn-navy);
  color: var(--text-on-dark);
}

.section-slate {
  background: var(--dn-slate);
  color: var(--text-on-dark);
}

.section-ivory {
  background: var(--dn-ivory);
}

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

.section-head {
  max-width: 720px;
  margin-bottom: var(--s-5);
}

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

.section-head p {
  margin-top: var(--s-2);
}

.grid {
  display: grid;
  gap: var(--s-3);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.6rem;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: transform var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
  position: relative;
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--dur-fast) var(--ease);
}

.btn:hover svg {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--dn-gold);
  color: var(--dn-navy);
}

.btn-primary:hover {
  background: #ecd0a0;
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid rgba(250, 251, 245, 0.22);
  color: var(--text-on-dark);
}

.btn-ghost:hover {
  border-color: var(--dn-gold);
  color: var(--dn-gold);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--surface-line);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--dn-gold);
  color: var(--dn-gold);
  transform: translateY(-2px);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}

/* ---------- Links with gold underline ---------- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text);
  position: relative;
}

.on-dark .link-arrow {
  color: var(--text-on-dark);
}

.link-arrow::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 1px;
  background: var(--dn-gold);
  transition: width var(--dur) var(--ease);
}

.link-arrow:hover {
  color: var(--dn-gold);
}

.link-arrow:hover::after {
  width: 100%;
}

.link-arrow svg {
  width: 14px;
  height: 14px;
  transition: transform var(--dur-fast) var(--ease);
}

.link-arrow:hover svg {
  transform: translateX(4px);
}

/* ---------- Reveal animations ---------- */
.reveal,
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.reveal {
  transform: translateY(14px);
}
.reveal-up {
  transform: translateY(28px);
}
.reveal-left {
  transform: translateX(-28px);
}
.reveal-right {
  transform: translateX(28px);
}

.is-visible.reveal,
.is-visible.reveal-up,
.is-visible.reveal-left,
.is-visible.reveal-right {
  opacity: 1;
  transform: none;
}

h1.reveal-up.is-visible {
    color: white !important;
}

/* SVG line draw */
.draw-line {
  stroke-dasharray: var(--dash, 1200);
  stroke-dashoffset: var(--dash, 1200);
  transition: stroke-dashoffset 1.6s var(--ease-out);
}

.is-visible .draw-line,
.draw-line.is-visible {
  stroke-dashoffset: 0;
}

/* ---------- Digitalnob Signal signature ---------- */
.dn-signal {
  display: block;
  width: 100%;
  max-width: 280px;
  height: 14px;
  margin-top: var(--s-2);
}

.dn-signal path {
  fill: none;
  stroke: var(--dn-gold);
  stroke-width: 1.4;
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
  transition: stroke-dashoffset 1.8s var(--ease-out) 0.2s;
}

.is-visible .dn-signal path,
.dn-signal.is-visible path {
  stroke-dashoffset: 0;
}

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.text-center {
  text-align: center;
}
.mx-auto {
  margin-inline: auto;
}
.mt-2 { margin-top: var(--s-2); }
.mt-3 { margin-top: var(--s-3); }
.mt-4 { margin-top: var(--s-4); }
.mt-5 { margin-top: var(--s-5); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal,
  .reveal-up,
  .reveal-left,
  .reveal-right {
    opacity: 1 !important;
    transform: none !important;
  }
  .draw-line,
  .dn-signal path {
    stroke-dashoffset: 0 !important;
  }
}