/* ═══════════════════════════════════════════════════
   QUIMERA OS — Design System v2.0
   Premium Dark Theme · Fibonacci Spacing · Gold Accent
   ═══════════════════════════════════════════════════ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500;600&family=Playfair+Display:ital,wght@0,700;0,800;0,900;1,700&display=swap');

/* ── CSS Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%;font-size:17px}
body{margin:0;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
img,picture,video,canvas,svg{display:block;max-width:100%}
input,button,textarea,select{font:inherit}
p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none}

/* ── Design Tokens ── */
:root {
  /* Colors — Dark Luxury */
  --bg-base:       #000000;
  --bg-primary:    #050505;
  --bg-secondary:  #0A0A0A;
  --bg-elevated:   rgba(255,255,255,0.04);
  --bg-surface:    rgba(255,255,255,0.06);
  --bg-hover:      rgba(255,255,255,0.08);

  --border-subtle:   rgba(255,255,255,0.04);
  --border-default:  rgba(255,255,255,0.08);
  --border-strong:   rgba(255,255,255,0.14);

  --text-primary:    #F5F5F7;
  --text-secondary:  rgba(255,255,255,0.6);
  --text-muted:      rgba(255,255,255,0.35);
  --text-inverse:    #000000;

  /* Accent — Gold */
  --gold:          #D4A853;
  --gold-light:    #E8C97A;
  --gold-dim:      rgba(212,168,83,0.10);
  --gold-glow:     rgba(212,168,83,0.20);

  /* Accent — Blue */
  --blue:          #3B82F6;
  --blue-dim:      rgba(59,130,246,0.10);

  /* Accent — Green */
  --green:         #10B981;
  --green-dim:     rgba(16,185,129,0.10);

  /* Accent — Purple */
  --purple:        #8B5CF6;
  --purple-dim:    rgba(139,92,246,0.10);

  /* Accent — Red */
  --red:           #EF4444;
  --red-dim:       rgba(239,68,68,0.10);

  /* Typography — Apple/Samsung scale */
  --font-body:     'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-display:  'Playfair Display', Georgia, serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', monospace;

  --text-xs:   12px;
  --text-sm:   14px;
  --text-base: 17px;
  --text-md:   18px;
  --text-lg:   20px;
  --text-xl:   24px;
  --text-2xl:  32px;
  --text-3xl:  42px;
  --text-4xl:  56px;
  --text-5xl:  68px;
  --text-6xl:  80px;

  /* Spacing — Fibonacci (expanded whitespace) */
  --sp-1: 6px;
  --sp-2: 10px;
  --sp-3: 16px;
  --sp-4: 24px;
  --sp-5: 40px;
  --sp-6: 64px;
  --sp-7: 96px;
  --sp-8: 120px;

  /* Radius — Samsung-style generous rounding */
  --radius-xs:  6px;
  --radius-sm:  12px;
  --radius-md:  16px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-full: 9999px;

  /* Shadows — Layered, soft, Apple-style */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.15);
  --shadow-md:  0 2px 8px rgba(0,0,0,0.3), 0 8px 32px rgba(0,0,0,0.2);
  --shadow-lg:  0 4px 12px rgba(0,0,0,0.25), 0 16px 48px rgba(0,0,0,0.2);
  --shadow-xl:  0 8px 24px rgba(0,0,0,0.3), 0 24px 64px rgba(0,0,0,0.25);
  --shadow-gold: 0 4px 16px rgba(212,168,83,0.15), 0 8px 32px rgba(212,168,83,0.10);

  /* Transitions — Apple-style smooth easing */
  --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-spring: cubic-bezier(0.25, 0.1, 0.25, 1.1);
  --dur-fast: 200ms;
  --dur-normal: 300ms;
  --dur-slow: 500ms;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --nav-height: 72px;
}

/* ── Light Theme Override ── */
:root[data-theme="light"] {
  --bg-base:       #FAFAFA;
  --bg-primary:    #F5F5F5;
  --bg-secondary:  #EFEFEF;
  --bg-elevated:   rgba(0,0,0,0.03);
  --bg-surface:    rgba(0,0,0,0.05);
  --bg-hover:      rgba(0,0,0,0.07);

  --border-subtle:   rgba(0,0,0,0.06);
  --border-default:  rgba(0,0,0,0.10);
  --border-strong:   rgba(0,0,0,0.18);

  --text-primary:    #1a1a1a;
  --text-secondary:  rgba(0,0,0,0.6);
  --text-muted:      rgba(0,0,0,0.35);
  --text-inverse:    #FFFFFF;

  --gold-dim:      rgba(212,168,83,0.12);
  --gold-glow:     rgba(212,168,83,0.25);

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 2px 8px rgba(0,0,0,0.10), 0 8px 32px rgba(0,0,0,0.06);
  --shadow-lg:  0 4px 12px rgba(0,0,0,0.08), 0 16px 48px rgba(0,0,0,0.06);
  --shadow-xl:  0 8px 24px rgba(0,0,0,0.10), 0 24px 64px rgba(0,0,0,0.08);
  --shadow-gold: 0 4px 16px rgba(212,168,83,0.20), 0 8px 32px rgba(212,168,83,0.12);
}

/* Light theme — scrollbar */
:root[data-theme="light"] ::-webkit-scrollbar-track { background: #F0F0F0; }
:root[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.2); }

/* Light theme — selection */
:root[data-theme="light"] ::selection {
  background: var(--gold);
  color: #fff;
}

/* Light theme — form select options */
:root[data-theme="light"] select option,
:root[data-theme="light"] select.input option {
  background: #FFFFFF;
  color: #1a1a1a;
}

/* Theme transition — only on key elements, not *.
   Applied via a temporary class to avoid affecting normal page transitions. */
html.theme-transitioning,
html.theme-transitioning body,
html.theme-transitioning .navbar,
html.theme-transitioning .card,
html.theme-transitioning .card-glass,
html.theme-transitioning .idx-card,
html.theme-transitioning .idx-tcard,
html.theme-transitioning .idx-hero,
html.theme-transitioning .idx-footer,
html.theme-transitioning .section,
html.theme-transitioning .section-alt,
html.theme-transitioning .btn,
html.theme-transitioning .input,
html.theme-transitioning .mega-menu,
html.theme-transitioning .badge,
html.theme-transitioning .toast,
html.theme-transitioning .back-to-top,
html.theme-transitioning .theme-toggle,
html.theme-transitioning h1,
html.theme-transitioning h2,
html.theme-transitioning h3,
html.theme-transitioning h4,
html.theme-transitioning p,
html.theme-transitioning a,
html.theme-transitioning span {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ── Theme Toggle Button ── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--dur-normal) var(--ease-out);
  font-size: 18px;
  line-height: 1;
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--gold-dim);
  border-color: var(--gold);
  color: var(--gold);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* ── Base ── */
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-base);
}

::selection {
  background: var(--gold);
  color: var(--text-inverse);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

/* ── Container ── */
.container,
.container-narrow {
  margin: 0 auto;
  padding: 0 var(--sp-5);
}
.container {
  width: 100%;
  max-width: var(--container-max);
}
.container-narrow {
  max-width: var(--container-narrow);
}

/* ── Grid ── */
.grid { display: grid; gap: 32px; contain: layout style; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-body);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
h1 { font-weight: 800; }
h2 { font-weight: 700; }
h3, h4 { font-weight: 600; }

.display-xl,
.display-lg {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.display-xl {
  font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl));
}
.display-lg {
  font-size: clamp(var(--text-3xl), 4.5vw, var(--text-5xl));
}
.headline-lg {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-3xl));
  font-weight: 700;
}
.headline-md {
  font-size: clamp(var(--text-xl), 2.5vw, var(--text-2xl));
  font-weight: 600;
}
.headline-sm {
  font-size: var(--text-lg);
  font-weight: 600;
}
.body-lg {
  font-size: var(--text-md);
  line-height: 1.7;
  color: var(--text-secondary);
}
.text-sm {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}
.text-mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

/* Text Utilities */
.gold-text {
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.gradient-text {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-gold { color: var(--gold); }

/* ── Section ── */
.section {
  padding: var(--sp-8) 0;
  position: relative;
}
.section-alt {
  background: var(--bg-secondary);
}
.section-header {
  margin-bottom: var(--sp-7);
}
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: var(--sp-3);
}
.section-desc {
  font-size: var(--text-md);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
  margin-top: var(--sp-3);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  height: 52px;
  padding: 0 32px;
  border-radius: 50px;
  border: 1px solid transparent;
  transition: all var(--dur-normal) var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--dur-fast);
}
.btn:hover::before { opacity: 1; }

.btn-primary {
  background: var(--gold);
  color: var(--text-inverse);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(212,168,83,0.30);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-default);
  height: 44px;
}
.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: var(--gold-dim);
}

.btn-ghost {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
  height: 44px;
}
.btn-ghost:hover {
  background: var(--gold-dim);
  color: var(--gold-light);
}

.btn-lg {
  height: 56px;
  padding: 0 40px;
  font-size: var(--text-base);
}
.btn-sm {
  padding: 10px 20px;
  font-size: var(--text-xs);
}
.btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ── Cards ── */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: border-color var(--dur-normal) var(--ease-out), transform var(--dur-normal) var(--ease-out), box-shadow var(--dur-normal) var(--ease-out);
  contain: layout paint;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card-glow:hover {
  border-color: rgba(212,168,83,0.15);
  box-shadow: 0 4px 16px rgba(212,168,83,0.06), 0 16px 48px rgba(212,168,83,0.04);
}

/* ── Badge ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--gold-dim);
  color: var(--gold);
  border: 1px solid rgba(212,168,83,0.12);
}
.badge-blue {
  background: var(--blue-dim);
  color: var(--blue);
  border-color: rgba(59,130,246,0.12);
}
.badge-green {
  background: var(--green-dim);
  color: var(--green);
  border-color: rgba(16,185,129,0.12);
}

/* ── Form Inputs ── */
.input {
  width: 100%;
  padding: 15px 20px;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 14px;
  transition: all var(--dur-normal) var(--ease-out);
  outline: none;
}
.input:focus,
.input:focus-visible {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-dim), 0 0 16px rgba(212,168,83,0.08);
}
.input::placeholder {
  color: var(--text-muted);
}
textarea.input {
  resize: vertical;
  min-height: 120px;
}
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5L6 7.5L9 4.5' stroke='%2386868B' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
/* Dark dropdown options — fix for dark OS themes */
select option,
select.input option {
  background: #1A1D24;
  color: #F9FAFB;
  padding: 8px 12px;
}
select option:checked,
select.input option:checked {
  background: #D4A853;
  color: #080A0F;
}
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ── Divider ── */
.divider {
  border: none;
  height: 1px;
  background: var(--border-subtle);
  margin: 0;
}
.divider-gold {
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
}

/* ── Reveal Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  will-change: auto;
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── Utilities ── */
.flex { display: flex; }
.flex-center { align-items: center; justify-content: center; }
.flex-between { justify-content: space-between; }
.items-center { align-items: center; }
.gap-sm { gap: var(--sp-2); }
.gap-md { gap: var(--sp-4); }
.gap-lg { gap: var(--sp-5); }
.hidden { display: none !important; }

/* ── Scroll Progress ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--blue));
  z-index: 10001;
  width: 0%;
  transition: width 50ms linear;
  will-change: width;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 16px 28px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: white;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-xl);
  z-index: 10000;
  transform: translateY(120%);
  transition: transform 0.4s var(--ease-out);
  will-change: transform;
}
.toast.visible { transform: translateY(0); }
.toast-success { border-left: 3px solid var(--green); }
.toast-error { border-left: 3px solid var(--red); }

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-normal) var(--ease-out), background var(--dur-normal) var(--ease-out), color var(--dur-normal) var(--ease-out), border-color var(--dur-normal) var(--ease-out);
  will-change: opacity;
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--gold);
  color: var(--text-inverse);
  border-color: var(--gold);
}
.back-to-top:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ── Responsive helpers ── */
@media (max-width: 768px) {
  :root {
    --sp-5: 24px;
    --sp-6: 40px;
    --sp-7: 64px;
    --sp-8: 80px;
    --nav-height: 64px;
  }
  .hide-mobile { display: none !important; }
  .section { padding: var(--sp-7) 0; }
}
@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

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