/* =========================================
   DNAi DESIGN SYSTEM — styles.css
   Studio: DNAi Global AI Studio
   Version: 3.0 — 2026
   Stack: CSS Custom Properties + Vanilla
   ========================================= */

/* ── 0. RESET & BASE ────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--ds-bg);
  color: var(--ds-text);
  font-family: var(--ds-font-body);
  font-size: var(--ds-t-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
:focus-visible {
  outline: 2px solid var(--ds-blue);
  outline-offset: 3px;
  border-radius: var(--ds-r-sm);
}

/* Skip link */
.skip-link {
  position: absolute; top: -999px; left: 1rem;
  padding: var(--ds-sp-2) var(--ds-sp-4);
  background: var(--ds-blue); color: #fff;
  border-radius: var(--ds-r-sm); z-index: 9999;
  font-size: var(--ds-t-sm); font-weight: 500;
}
.skip-link:focus { top: 1rem; }

/* ── 1. TOKENS ───────────────────────────── */
:root {
  /* Background scale */
  --ds-bg:          #070B14;
  --ds-bg-1:        #0D1424;
  --ds-bg-2:        #101828;
  --ds-surface:     #131D2E;
  --ds-surface-2:   #1A2540;
  --ds-border:      rgba(30, 80, 160, 0.25);
  --ds-border-2:    rgba(0, 120, 255, 0.18);

  /* Text */
  --ds-text:        #E8EDF5;
  --ds-text-2:      #8FA3C0;
  --ds-text-3:      #4A6080;
  --ds-text-inv:    #070B14;

  /* Brand primaries */
  --ds-blue:        #1E7BFF;
  --ds-blue-2:      #0055CC;
  --ds-blue-glow:   rgba(30, 123, 255, 0.35);
  --ds-blue-dim:    rgba(30, 123, 255, 0.12);

  /* Accent — amber/gold */
  --ds-gold:        #F0A832;
  --ds-gold-2:      #C8861A;
  --ds-gold-glow:   rgba(240, 168, 50, 0.30);
  --ds-gold-dim:    rgba(240, 168, 50, 0.10);

  /* Semantic */
  --ds-success:     #22C55E;
  --ds-warning:     #F59E0B;
  --ds-error:       #EF4444;

  /* Typography */
  --ds-font-display: 'Fraunces', Georgia, serif;
  --ds-font-body:    'Inter', system-ui, sans-serif;
  --ds-font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Type scale (clamp: mobile → desktop) */
  --ds-t-2xs:  clamp(0.625rem, 0.5vw + 0.5rem, 0.75rem);
  --ds-t-xs:   clamp(0.75rem,  0.6vw + 0.6rem, 0.875rem);
  --ds-t-sm:   clamp(0.875rem, 0.7vw + 0.7rem, 1rem);
  --ds-t-base: clamp(1rem,     0.9vw + 0.8rem, 1.125rem);
  --ds-t-lg:   clamp(1.125rem, 1.1vw + 0.9rem, 1.375rem);
  --ds-t-xl:   clamp(1.375rem, 1.5vw + 1rem,   1.75rem);
  --ds-t-2xl:  clamp(1.75rem,  2.2vw + 1.2rem,  2.5rem);
  --ds-t-3xl:  clamp(2.25rem,  3.5vw + 1.5rem,  3.5rem);
  --ds-t-4xl:  clamp(3rem,     5vw + 1.8rem,    5.5rem);
  --ds-t-hero: clamp(3.5rem,   8vw + 2rem,      9rem);

  /* Spacing 8pt grid */
  --ds-sp-1: 0.25rem;   /* 4px  */
  --ds-sp-2: 0.5rem;    /* 8px  */
  --ds-sp-3: 0.75rem;   /* 12px */
  --ds-sp-4: 1rem;      /* 16px */
  --ds-sp-5: 1.25rem;   /* 20px */
  --ds-sp-6: 1.5rem;    /* 24px */
  --ds-sp-8: 2rem;      /* 32px */
  --ds-sp-10: 2.5rem;   /* 40px */
  --ds-sp-12: 3rem;     /* 48px */
  --ds-sp-16: 4rem;     /* 64px */
  --ds-sp-20: 5rem;     /* 80px */
  --ds-sp-24: 6rem;     /* 96px */
  --ds-sp-32: 8rem;     /* 128px */

  /* Border radius */
  --ds-r-sm:  4px;
  --ds-r-md:  8px;
  --ds-r-lg:  16px;
  --ds-r-xl:  24px;
  --ds-r-pill: 9999px;

  /* Transitions */
  --ds-ease:       cubic-bezier(0.16, 1, 0.3, 1);
  --ds-ease-in:    cubic-bezier(0.4, 0, 1, 1);
  --ds-ease-out:   cubic-bezier(0, 0, 0.2, 1);
  --ds-t-fast:     180ms;
  --ds-t-base-dur: 320ms;
  --ds-t-slow:     600ms;

  /* Shadows / Glows */
  --ds-glow-blue:  0 0 24px rgba(30, 123, 255, 0.4), 0 0 60px rgba(30, 123, 255, 0.15);
  --ds-glow-gold:  0 0 20px rgba(240, 168, 50, 0.35), 0 0 50px rgba(240, 168, 50, 0.12);
  --ds-shadow-card: 0 4px 24px rgba(0,0,0,0.45), 0 1px 4px rgba(0,0,0,0.3);
}

/* ── 2. LAYOUT UTILITIES ─────────────────── */
.ds-container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: clamp(var(--ds-sp-6), 5vw, var(--ds-sp-20));
}
.ds-section {
  padding-block: clamp(var(--ds-sp-16), 10vw, var(--ds-sp-32));
  border-bottom: 1px solid var(--ds-border);
}
.ds-section:last-of-type { border-bottom: none; }
.ds-section-label {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ds-blue);
  margin-bottom: var(--ds-sp-6);
  display: flex; align-items: center; gap: var(--ds-sp-3);
}
.ds-section-label::before {
  content: '';
  display: inline-block;
  width: 20px; height: 1px;
  background: var(--ds-blue);
}
.ds-section-title {
  font-family: var(--ds-font-display);
  font-size: var(--ds-t-3xl);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ds-text);
  margin-bottom: var(--ds-sp-4);
}
.ds-section-desc {
  font-size: var(--ds-t-base);
  color: var(--ds-text-2);
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: var(--ds-sp-12);
}

/* Grid helpers */
.ds-grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--ds-sp-6); }
.ds-grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--ds-sp-6); }
.ds-grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--ds-sp-4); }
.ds-flex-row { display: flex; flex-wrap: wrap; gap: var(--ds-sp-4); align-items: center; }

/* Glassmorphism card */
.ds-glass {
  background: rgba(19, 29, 46, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-r-lg);
}
.ds-glass-bright {
  background: rgba(26, 37, 64, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(30, 123, 255, 0.25);
  border-radius: var(--ds-r-lg);
}
/* Glow line separator */
/* ── INTRO HEADER ───────────────────────── */
.ds-intro {
  position: relative;
  min-height: 520px;
  display: flex; align-items: center;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(30,123,255,0.18) 0%, transparent 70%),
              linear-gradient(180deg, var(--ds-bg-1) 0%, var(--ds-bg) 100%);
}
.ds-intro-helix-bg {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.ds-intro-helix-bg canvas { opacity: 0.5; width: 100%; height: 100%; object-fit: cover; }
.ds-intro-content {
  position: relative; z-index: 2;
  padding-block: clamp(var(--ds-sp-16), 8vw, var(--ds-sp-32));
}
.ds-intro-title {
  font-family: var(--ds-font-display);
  font-size: var(--ds-t-hero);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--ds-text);
  margin-bottom: var(--ds-sp-6);
}
.ds-intro-title em {
  font-style: italic;
  color: var(--ds-blue);
  font-weight: 200;
}
.ds-intro-sub {
  font-size: var(--ds-t-xl);
  color: var(--ds-text-2);
  line-height: 1.5;
  max-width: 520px;
  margin-bottom: var(--ds-sp-8);
}
.ds-intro-meta { flex-wrap: wrap; }
.ds-tag {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.1em;
  color: var(--ds-text-2);
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-r-pill);
  padding: var(--ds-sp-1) var(--ds-sp-4);
}

/* ── 3. NAV ──────────────────────────────── */
.ds-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7, 11, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--ds-border);
}
.ds-nav-inner {
  display: flex; align-items: center;
  justify-content: space-between;
  height: 64px; gap: var(--ds-sp-8);
}
.ds-nav-logo {
  display: flex; align-items: center; gap: var(--ds-sp-3);
  flex-shrink: 0;
}
.ds-nav-logo img { height: 40px; width: auto; }
.ds-nav-badge {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.12em;
  color: var(--ds-blue);
  background: var(--ds-blue-dim);
  border: 1px solid var(--ds-border-2);
  padding: 2px 8px;
  border-radius: var(--ds-r-pill);
  text-transform: uppercase;
}
.ds-nav-links {
  display: flex; align-items: center;
  gap: var(--ds-sp-6); list-style: none;
}
.ds-nav-links a {
  font-size: var(--ds-t-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ds-text-2);
  transition: color var(--ds-t-fast) var(--ds-ease);
}
.ds-nav-links a:hover { color: var(--ds-text); }
.ds-nav-menu {
  display: none; flex-direction: column;
  gap: 5px; padding: var(--ds-sp-2);
}
.ds-nav-menu span {
  display: block; width: 22px; height: 1.5px;
  background: var(--ds-text); border-radius: 2px;
  transition: transform var(--ds-t-fast) var(--ds-ease);
}
.ds-mobile-nav[hidden] { display: none !important; }
.ds-mobile-nav {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(7, 11, 20, 0.97);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: var(--ds-sp-8);
}
.ds-mobile-nav ul { list-style: none; text-align: center; }
.ds-mobile-nav li + li { margin-top: var(--ds-sp-6); }
.ds-mobile-nav a {
  font-family: var(--ds-font-display);
  font-size: var(--ds-t-3xl); font-weight: 300;
  color: var(--ds-text);
  transition: color var(--ds-t-base-dur) var(--ds-ease);
}
.ds-mobile-nav a:hover { color: var(--ds-blue); }
.ds-mobile-close {
  position: absolute; top: 1.5rem; right: 1.5rem;
  font-size: 2rem; color: var(--ds-text-2);
  line-height: 1; padding: var(--ds-sp-2);
}
.ds-mobile-close:hover { color: var(--ds-text); }
@media (max-width: 768px) {
  .ds-nav-links { display: none; }
  .ds-nav-menu { display: flex; }
}
/* ── 4. PRINCIPLE CARDS ─────────────────── */
.ds-principle-card {
  padding: var(--ds-sp-8);
  transition: border-color var(--ds-t-base-dur) var(--ds-ease),
              box-shadow var(--ds-t-base-dur) var(--ds-ease),
              transform var(--ds-t-base-dur) var(--ds-ease);
}
.ds-principle-card:hover {
  border-color: var(--ds-border-2);
  box-shadow: 0 0 30px rgba(30,123,255,0.12);
  transform: translateY(-2px);
}
.ds-principle-icon {
  margin-bottom: var(--ds-sp-5);
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: var(--ds-bg-2);
  border-radius: var(--ds-r-md);
  border: 1px solid var(--ds-border);
}
.ds-principle-title {
  font-size: var(--ds-t-base);
  font-weight: 500;
  color: var(--ds-text);
  margin-bottom: var(--ds-sp-3);
  letter-spacing: -0.01em;
}
.ds-principle-desc {
  font-size: var(--ds-t-sm);
  color: var(--ds-text-2);
  line-height: 1.7;
}
.ds-principle-desc code {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: var(--ds-blue);
  background: var(--ds-blue-dim);
  padding: 1px 6px;
  border-radius: 3px;
}

/* ── 5. COLOR SWATCHES ──────────────────── */
.ds-sub-title {
  font-size: var(--ds-t-lg);
  font-weight: 500;
  color: var(--ds-text);
  letter-spacing: -0.01em;
  margin-bottom: var(--ds-sp-6);
}
.ds-color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--ds-sp-4);
  margin-bottom: var(--ds-sp-8);
}
.ds-color-swatch {
  border-radius: var(--ds-r-lg);
  min-height: 120px;
  display: flex; align-items: flex-end;
  overflow: hidden;
  cursor: default;
  transition: transform var(--ds-t-fast) var(--ds-ease);
}
.ds-color-swatch--tall { min-height: 160px; }
.ds-color-swatch:hover { transform: scale(1.02); }
.ds-color-label {
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  padding: var(--ds-sp-3) var(--ds-sp-4);
  width: 100%;
  display: flex; flex-direction: column; gap: 2px;
}
.ds-color-name {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: rgba(255,255,255,0.9);
  letter-spacing: 0.05em;
}
.ds-color-hex {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-sm);
  color: white;
  font-weight: 500;
}
.ds-color-role {
  font-size: var(--ds-t-2xs);
  color: rgba(255,255,255,0.65);
}
.ds-color-wcag {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: #22C55E;
  margin-top: 2px;
}
/* Do/Don't cards */
.ds-do-card { padding: var(--ds-sp-6); }
.ds-do-badge {
  display: inline-block;
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 2px 10px;
  border-radius: var(--ds-r-pill);
  margin-bottom: var(--ds-sp-4);
  font-weight: 500;
}
.ds-do-badge--do { background: rgba(34,197,94,0.15); color: #22C55E; border: 1px solid rgba(34,197,94,0.3); }
.ds-do-badge--dont { background: rgba(239,68,68,0.15); color: #EF4444; border: 1px solid rgba(239,68,68,0.3); }
.ds-do-preview { margin-bottom: var(--ds-sp-4); }
.ds-do-note { font-size: var(--ds-t-sm); color: var(--ds-text-2); line-height: 1.6; }

/* ── 4a. HELIX ──────────────────────────── */
.ds-helix-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--ds-sp-8);
  padding: var(--ds-sp-8);
  align-items: center;
  margin-bottom: var(--ds-sp-8);
}
@media (max-width: 768px) {
  .ds-helix-showcase { grid-template-columns: 1fr; }
}
.ds-helix-live {
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--ds-r-lg);
  overflow: hidden;
  background: var(--ds-bg);
  border: 1px solid var(--ds-border);
}
.ds-helix-live canvas { width: 100%; height: auto; }
.ds-helix-rule { padding: var(--ds-sp-6); }

/* ── 4b. MOTION ─────────────────────────── */
.ds-motion-card {
  padding: var(--ds-sp-6);
  cursor: pointer;
  user-select: none;
}
.ds-motion-label {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-xs);
  color: var(--ds-blue);
  margin-bottom: var(--ds-sp-1);
  font-weight: 500;
}
.ds-motion-value {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: var(--ds-text-3);
  margin-bottom: var(--ds-sp-4);
}
.ds-motion-track {
  height: 40px;
  background: var(--ds-bg-2);
  border-radius: var(--ds-r-md);
  position: relative;
  margin-bottom: var(--ds-sp-4);
  overflow: hidden;
}
.ds-motion-ball {
  position: absolute; top: 50%;
  width: 20px; height: 20px;
  border-radius: 50%;
  transform: translateY(-50%) translateX(4px);
  transition: transform 0ms linear;
}
.ds-motion-ball.animate {
  transform: translateY(-50%) translateX(calc(100% + 8px));
}
.ds-motion-card:nth-child(1) .ds-motion-ball.animate {
  transition: transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.ds-motion-card:nth-child(2) .ds-motion-ball.animate {
  transition: transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}
.ds-motion-card:nth-child(3) .ds-motion-ball.animate {
  transition: transform 180ms cubic-bezier(0, 0, 0.2, 1);
}
.ds-motion-ball--primary { background: var(--ds-blue); box-shadow: var(--ds-glow-blue); }
.ds-motion-ball--gold { background: var(--ds-gold); box-shadow: var(--ds-glow-gold); }
.ds-motion-ball--ghost { background: var(--ds-text-2); }
.ds-motion-use { font-size: var(--ds-t-xs); color: var(--ds-text-2); margin-bottom: var(--ds-sp-1); }
.ds-motion-trigger {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: var(--ds-text-3);
}
/* Code blocks */
.ds-code-block {
  background: var(--ds-bg);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-r-md);
  padding: var(--ds-sp-4) var(--ds-sp-6);
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-xs);
  color: var(--ds-text-2);
  overflow-x: auto;
  line-height: 1.8;
}
.ds-code-pill {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  padding: 3px 10px;
  border-radius: var(--ds-r-pill);
}
.ds-code-pill--danger { background: rgba(239,68,68,0.1); color: #EF4444; border: 1px solid rgba(239,68,68,0.25); }

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

/* ── 5a. BUTTONS ────────────────────────── */
.ds-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--ds-sp-2);
  padding: 0.75em 1.5em;
  font-family: var(--ds-font-body);
  font-size: var(--ds-t-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: var(--ds-r-md);
  min-height: 44px;
  transition: all var(--ds-t-base-dur) var(--ds-ease);
  position: relative; overflow: hidden;
  white-space: nowrap;
}
.ds-btn::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(255,255,255,0); border-radius: inherit;
  transition: background var(--ds-t-fast);
}
.ds-btn:hover::after { background: rgba(255,255,255,0.05); }
.ds-btn:active { transform: scale(0.98); }
.ds-btn:disabled, .ds-btn[aria-disabled="true"] {
  opacity: 0.38; cursor: not-allowed; pointer-events: none;
}
.ds-btn--primary {
  background: var(--ds-blue);
  color: #fff;
  box-shadow: 0 0 0 0 rgba(30,123,255,0);
}
.ds-btn--primary:hover {
  background: #3A8FFF;
  box-shadow: var(--ds-glow-blue);
}
.ds-btn--secondary {
  background: var(--ds-surface-2);
  color: var(--ds-text);
  border: 1px solid var(--ds-border-2);
}
.ds-btn--secondary:hover { border-color: var(--ds-blue); color: var(--ds-blue); }
.ds-btn--ghost {
  background: transparent;
  color: var(--ds-text-2);
  border: 1px solid var(--ds-border);
}
.ds-btn--ghost:hover { color: var(--ds-text); border-color: var(--ds-text-2); }
.ds-btn--gold {
  background: var(--ds-gold);
  color: var(--ds-text-inv);
  font-weight: 600;
}
.ds-btn--gold:hover { background: #F5B842; box-shadow: var(--ds-glow-gold); }
.ds-btn--sm { font-size: var(--ds-t-xs); padding: 0.5em 1em; min-height: 36px; }
.ds-btn--lg { font-size: var(--ds-t-base); padding: 0.9em 2em; min-height: 52px; }
.ds-btn--icon {
  width: 44px; height: 44px; padding: 0;
  border: 1px solid var(--ds-border-2);
  color: var(--ds-text-2); background: var(--ds-surface);
  font-size: 1.25rem;
}
.ds-btn--icon:hover { color: var(--ds-blue); border-color: var(--ds-blue); }
/* Badges */
.ds-badge {
  display: inline-flex; align-items: center;
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--ds-r-pill);
  white-space: nowrap;
}
.ds-badge--blue { background: var(--ds-blue-dim); color: var(--ds-blue); border: 1px solid rgba(30,123,255,0.3); }
.ds-badge--gold { background: var(--ds-gold-dim); color: var(--ds-gold); border: 1px solid rgba(240,168,50,0.3); }
.ds-badge--success { background: rgba(34,197,94,0.1); color: #22C55E; border: 1px solid rgba(34,197,94,0.3); }
.ds-badge--neutral { background: rgba(255,255,255,0.06); color: var(--ds-text-2); border: 1px solid var(--ds-border); }
.ds-badge--outline { background: transparent; color: var(--ds-text-2); border: 1px solid var(--ds-border-2); }
.ds-badge--outline-gold { background: transparent; color: var(--ds-gold); border: 1px solid rgba(240,168,50,0.4); }
/* Links */
.ds-link {
  color: var(--ds-blue);
  border-bottom: 1px solid rgba(30,123,255,0.3);
  transition: border-color var(--ds-t-fast) var(--ds-ease), color var(--ds-t-fast);
}
.ds-link:hover { border-color: var(--ds-blue); }
.ds-link-gold { color: var(--ds-gold); border-bottom: 1px solid rgba(240,168,50,0.3); }
.ds-link-gold:hover { border-color: var(--ds-gold); }
/* Form */
.ds-comp-block { padding: var(--ds-sp-8); }
.ds-comp-note {
  margin-top: var(--ds-sp-4);
  font-size: var(--ds-t-xs);
  color: var(--ds-text-3);
  font-family: var(--ds-font-mono);
}
.ds-form-group { margin-bottom: var(--ds-sp-5); }
.ds-label {
  display: block;
  font-size: var(--ds-t-xs);
  font-weight: 500;
  color: var(--ds-text-2);
  letter-spacing: 0.03em;
  margin-bottom: var(--ds-sp-2);
}
.ds-input {
  width: 100%;
  background: var(--ds-bg-2);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-r-md);
  color: var(--ds-text);
  font-family: var(--ds-font-body);
  font-size: var(--ds-t-sm);
  padding: 0.7em 1em;
  transition: border-color var(--ds-t-fast) var(--ds-ease),
              box-shadow var(--ds-t-fast) var(--ds-ease);
  outline: none;
}
.ds-input::placeholder { color: var(--ds-text-3); }
.ds-input:focus {
  border-color: var(--ds-blue);
  box-shadow: 0 0 0 3px rgba(30,123,255,0.15);
}
.ds-textarea { resize: vertical; min-height: 120px; }
/* Case cards */
.ds-case-card {
  overflow: hidden;
  transition: transform var(--ds-t-base-dur) var(--ds-ease),
              box-shadow var(--ds-t-base-dur) var(--ds-ease);
}
.ds-case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 30px rgba(30,123,255,0.1);
}
.ds-case-thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, rgba(30,123,255,0.08), rgba(240,168,50,0.05));
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.ds-case-thumb-placeholder { display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; }
.ds-case-hover-overlay {
  position: absolute; inset: 0;
  background: rgba(7,11,20,0.75);
  display: flex; align-items: center; justify-content: center;
  color: var(--ds-blue); font-weight: 500; font-size: var(--ds-t-base);
  opacity: 0;
  transition: opacity var(--ds-t-base-dur) var(--ds-ease);
}
.ds-case-card:hover .ds-case-hover-overlay { opacity: 1; }
.ds-case-body { padding: var(--ds-sp-6); }
.ds-case-title {
  font-size: var(--ds-t-lg);
  font-weight: 500;
  color: var(--ds-text);
  margin-bottom: var(--ds-sp-1);
  letter-spacing: -0.01em;
}
.ds-case-client {
  font-size: var(--ds-t-sm);
  color: var(--ds-text-3);
}

/* ── 5b. SPACING & GRID ─────────────────── */
.ds-spacing-grid {
  display: flex; flex-wrap: wrap; gap: var(--ds-sp-6);
  align-items: flex-end;
  margin-bottom: var(--ds-sp-8);
}
.ds-sp-item {
  display: flex; flex-direction: column;
  align-items: center; gap: var(--ds-sp-2);
}
.ds-sp-bar {
  background: linear-gradient(135deg, var(--ds-blue), var(--ds-gold));
  border-radius: var(--ds-r-sm);
  min-width: 4px; min-height: 4px;
}
.ds-sp-item code {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: var(--ds-blue);
}
.ds-sp-item span {
  font-size: var(--ds-t-2xs);
  color: var(--ds-text-3);
}
.ds-bp-card {
  padding: var(--ds-sp-6);
  text-align: center;
}
.ds-bp-label {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ds-blue);
  margin-bottom: var(--ds-sp-2);
}
.ds-bp-value {
  font-size: var(--ds-t-2xl);
  font-weight: 300;
  color: var(--ds-text);
  line-height: 1;
  margin-bottom: var(--ds-sp-2);
}
.ds-bp-desc {
  font-size: var(--ds-t-2xs);
  color: var(--ds-text-3);
}
.ds-grid-demo {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 8px; margin-bottom: 8px;
}
.ds-grid-demo-col {
  height: 8px;
  background: rgba(30,123,255,0.15);
  border: 1px solid rgba(30,123,255,0.25);
  border-radius: 2px;
}
.ds-grid-demo-content {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 8px;
}
.ds-grid-span-8 { grid-column: span 8; padding: var(--ds-sp-4); }
.ds-grid-span-4 { grid-column: span 4; padding: var(--ds-sp-4); }
@media (max-width: 640px) {
  .ds-grid-span-8, .ds-grid-span-4 { grid-column: span 12; }
  .ds-grid-demo { display: none; }
}

/* ── 6. TYPOGRAPHY SPECIMENS ────────────── */
.ds-type-specimen {
  padding: clamp(var(--ds-sp-8), 5vw, var(--ds-sp-16));
  margin-bottom: var(--ds-sp-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ds-type-meta {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  letter-spacing: 0.12em;
  color: var(--ds-blue);
  text-transform: uppercase;
  margin-bottom: var(--ds-sp-6);
}
.ds-type-hero-specimen {
  font-family: var(--ds-font-display);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--ds-text);
}
.ds-type-hero-specimen em {
  font-style: italic;
  color: var(--ds-blue);
  font-weight: 200;
}
.ds-type-scale { display: flex; flex-direction: column; gap: var(--ds-sp-3); }
.ds-type-row {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: var(--ds-sp-4) var(--ds-sp-6);
  gap: var(--ds-sp-4);
  flex-wrap: wrap;
}
.ds-type-info {
  display: flex; flex-direction: column; gap: 3px;
  min-width: 200px;
}
.ds-type-info code {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: var(--ds-blue);
}
.ds-type-info span {
  font-size: var(--ds-t-2xs);
  color: var(--ds-text-3);
  font-family: var(--ds-font-mono);
}
.ds-type-use {
  color: var(--ds-text-2) !important;
  font-family: var(--ds-font-body) !important;
  font-size: var(--ds-t-xs) !important;
}
.ds-type-sample { color: var(--ds-text); line-height: 1.2; }

/* ── SCROLL REVEAL ──────────────────────── */
.ds-will-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms cubic-bezier(0.16,1,0.3,1),
              transform 600ms cubic-bezier(0.16,1,0.3,1);
}
.ds-revealed {
  opacity: 1;
  transform: translateY(0);
}
/* Nav active */
.ds-nav-links a.active { color: var(--ds-blue); }
.ds-nav-links a.active::after {
  content: '';
  display: block;
  height: 1px;
  background: var(--ds-blue);
  margin-top: 2px;
}

/* ── FOOTER ─────────────────────────────── */
.ds-footer {
  border-top: 1px solid var(--ds-border);
  padding-block: var(--ds-sp-12);
  background: var(--ds-bg-1);
}
.ds-footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--ds-sp-8); flex-wrap: wrap;
}
.ds-footer-brand { display: flex; flex-direction: column; gap: var(--ds-sp-2); }
.ds-footer-brand img { height: 32px; width: auto; }
.ds-footer-tagline {
  font-family: var(--ds-font-mono);
  font-size: var(--ds-t-2xs);
  color: var(--ds-blue);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.ds-footer-meta {
  font-size: var(--ds-t-xs);
  color: var(--ds-text-2);
  text-align: right;
  line-height: 1.6;
}
@media (max-width: 640px) {
  .ds-footer-inner { flex-direction: column; align-items: flex-start; }
  .ds-footer-meta { text-align: left; }
}

/* ── VOICE / TONE ───────────────────────── */
.ds-voice-list { display: flex; flex-direction: column; gap: var(--ds-sp-3); }
.ds-voice-item {
  padding: var(--ds-sp-3) var(--ds-sp-4);
  border-radius: var(--ds-r-md);
  display: flex; flex-direction: column; gap: 3px;
}
.ds-voice-item--do { background: rgba(34,197,94,0.05); border: 1px solid rgba(34,197,94,0.15); }
.ds-voice-item--dont { background: rgba(239,68,68,0.05); border: 1px solid rgba(239,68,68,0.15); }
.ds-voice-quote { font-size: var(--ds-t-sm); font-weight: 500; color: var(--ds-text); }
.ds-voice-why { font-size: var(--ds-t-2xs); font-family: var(--ds-font-mono); color: var(--ds-text-3); }

/* ── LOGO CARDS ─────────────────────────── */
.ds-logo-card {
  padding: var(--ds-sp-10);
  display: flex; flex-direction: column;
  align-items: center; text-align: center; gap: var(--ds-sp-4);
}
.ds-logo-card--dark { background: rgba(7,11,20,0.8); }
.ds-logo-card--light { background: rgba(232,237,245,0.9); }
.ds-logo-card img { max-width: 200px; width: 100%; height: auto; }
.ds-logo-label { font-size: var(--ds-t-sm); font-weight: 500; color: var(--ds-text); }
.ds-logo-note { font-size: var(--ds-t-xs); color: var(--ds-text-3); font-family: var(--ds-font-mono); }
/* Icon grid */
.ds-icon-grid {
  display: flex; flex-wrap: wrap; gap: var(--ds-sp-4);
}
.ds-icon-item {
  display: flex; flex-direction: column; align-items: center; gap: var(--ds-sp-2);
  padding: var(--ds-sp-6);
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-r-lg);
  min-width: 80px;
  transition: border-color var(--ds-t-fast) var(--ds-ease), color var(--ds-t-fast);
  color: var(--ds-text-2);
}
.ds-icon-item:hover { border-color: var(--ds-blue); color: var(--ds-blue); }
.ds-icon { width: 24px; height: 24px; }
.ds-icon-item span { font-size: var(--ds-t-2xs); font-family: var(--ds-font-mono); }

/* ── DIVIDER ─────────────────────────────── */
.ds-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--ds-blue) 40%, var(--ds-gold) 60%, transparent);
  opacity: 0.4;
  margin-block: var(--ds-sp-12);
  border: none;
}