/* ============================================================
   TAAPE — Premium Design System
   design-system.css
   ============================================================ */

/* ─────────────────────────────────────────────
   1. CSS Custom Properties (Design Tokens)
───────────────────────────────────────────── */
:root {
  /* Core palette */
  --color-bg:           #0B0D12;
  --color-surface:      #111520;
  --color-surface-2:    #161b28;
  --color-surface-3:    #1c2235;
  --color-border:       rgba(255, 255, 255, 0.07);
  --color-border-hover: rgba(255, 255, 255, 0.14);

  /* Text */
  --color-text:         #F2F0EA;
  --color-text-muted:   #8A8FA8;
  --color-text-subtle:  #505570;

  /* Accent — warm orange / gold (TAAPE brand)  */
  --color-accent:       #FF7A18;
  --color-accent-gold:  #F9D342;
  --color-accent-dim:   rgba(255, 122, 24, 0.15);

  /* Premium gradient */
  --gradient-accent:    linear-gradient(135deg, #FF7A18 0%, #FF5D47 100%);
  --gradient-gold:      linear-gradient(135deg, #F9D342 0%, #FF7A18 100%);
  --gradient-subtle:    linear-gradient(180deg, rgba(255,122,24,0.08) 0%, transparent 60%);

  /* Typography */
  --font-display:  "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-body:     "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono:     "IBM Plex Mono", "Courier New", monospace;

  /* Spacing scale */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-7:  1.75rem;

  /* Border radius */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md:  0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg:  0 12px 48px rgba(0, 0, 0, 0.5);
  --shadow-xl:  0 24px 80px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast:   120ms;
  --duration-base:   220ms;
  --duration-slow:   400ms;
  --duration-slower: 700ms;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 68px;
}

/* ─────────────────────────────────────────────
   2. Reset & Base
───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* ─────────────────────────────────────────────
   3. Typography Scale
───────────────────────────────────────────── */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 7vw, 6.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.035em;
}

.display-md {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.heading-lg {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.heading-md {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.body-lg {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.body-text {
  font-size: 1rem;
  line-height: 1.7;
}

.muted-text {
  color: var(--color-text-muted);
}

.mono-text {
  font-family: var(--font-mono);
}

/* ─────────────────────────────────────────────
   4. Gradient Text
───────────────────────────────────────────── */
.gradient-text {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─────────────────────────────────────────────
   5. Eyebrow Labels
───────────────────────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-4);
}

.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   6. Buttons
───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-pill);
  transition:
    background var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    opacity var(--duration-base);
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

/* Primary */
.btn--primary {
  background: var(--gradient-accent);
  color: #fff;
  padding: 0.75rem 1.5rem;
  box-shadow: 0 0 0 0 rgba(255, 122, 24, 0);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background var(--duration-base);
}

.btn--primary:hover::before {
  background: rgba(255, 255, 255, 0.1);
}

.btn--primary:hover {
  box-shadow: 0 0 24px rgba(255, 122, 24, 0.35), 0 4px 16px rgba(0,0,0,0.3);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

/* Ghost */
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
}

.btn--ghost:hover {
  border-color: var(--color-border-hover);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-1px);
}

/* Secondary */
.btn--secondary {
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
}

.btn--secondary:hover {
  background: var(--color-surface-3);
  border-color: var(--color-border-hover);
}

/* Sizes */
.btn--sm  { font-size: 0.8rem; padding: 0.55rem 1.1rem; }
.btn--lg  { font-size: 0.95rem; padding: 0.9rem 1.75rem; }
.btn--xl  { font-size: 1rem; padding: 1.1rem 2.2rem; }

/* ─────────────────────────────────────────────
   7. Cards
───────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition:
    border-color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card--accent-hover:hover {
  border-color: rgba(255, 122, 24, 0.3);
}

/* Glass card */
.card--glass {
  background: rgba(17, 21, 32, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

/* ─────────────────────────────────────────────
   8. Layout Utilities
───────────────────────────────────────────── */
.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

@media (min-width: 768px) {
  .container {
    width: min(100% - 4rem, var(--max-width));
  }
}

.section {
  padding: var(--space-24) 0;
}

.section--dark {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section--alt {
  background: rgba(17, 21, 32, 0.5);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-16);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.section-title em {
  font-style: italic;
  font-weight: 300;
  color: var(--color-text-muted);
}

.section-sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 56ch;
  margin: 0 auto;
}

/* Animation reveal targets */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

[data-animate="fade-in"] {
  transform: none;
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}