/* ═══════════════════════════════════════════════════════
   OpenAICE — Premium Black & White Design System
   ═══════════════════════════════════════════════════════ */

/* ─── Base Colors ─── */
:root {
  --md-primary-fg-color: #000000;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #555555;
  --md-text-font: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --md-code-font: "JetBrains Mono", "SF Mono", "Fira Code", monospace;
  --oa-text-primary: #111111;
  --oa-text-secondary: #555555;
  --oa-text-muted: #888888;
  --oa-border: #e0e0e0;
  --oa-surface: #fafafa;
  --oa-card-bg: #ffffff;
  --oa-hover-bg: #f5f5f5;
}

body, .md-typeset {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #0a0a0a;
  --md-default-fg-color: #e8e8e8;
  --md-primary-fg-color: #ffffff;
  --md-primary-bg-color: #0a0a0a;
  --md-accent-fg-color: #aaaaaa;
  --oa-text-primary: #f0f0f0;
  --oa-text-secondary: #aaaaaa;
  --oa-text-muted: #666666;
  --oa-border: #222222;
  --oa-surface: #111111;
  --oa-card-bg: #141414;
  --oa-hover-bg: #1a1a1a;
}

/* ─── Header ─── */
.md-header {
  background: #000000 !important;
  color: #ffffff !important;
  border-bottom: 1px solid #222;
}

.md-header .md-header__button,
.md-header .md-header__title,
.md-header .md-header__topic {
  color: #ffffff !important;
}

[data-md-color-scheme="default"] .md-header {
  background: #ffffff !important;
  color: #000000 !important;
  border-bottom: 1px solid #eee;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

[data-md-color-scheme="default"] .md-header .md-header__button,
[data-md-color-scheme="default"] .md-header .md-header__title,
[data-md-color-scheme="default"] .md-header .md-header__topic {
  color: #000000 !important;
}

/* ─── Tabs ─── */
.md-tabs {
  background: #0a0a0a !important;
  color: #ffffff !important;
  border-bottom: 1px solid #1a1a1a;
}

.md-tabs__link {
  color: #ffffff !important;
  opacity: 0.7;
}

.md-tabs__link--active {
  color: #ffffff !important;
  opacity: 1;
  font-weight: 600;
}

[data-md-color-scheme="default"] .md-tabs {
  background: #f8f8f8 !important;
  color: #000000 !important;
  border-bottom: 1px solid #eee;
}

[data-md-color-scheme="default"] .md-tabs__link {
  color: #000000 !important;
}

/* ─── Header Logo ─── */
.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 30px;
  width: 30px;
}

[data-md-color-scheme="slate"] .md-header__button.md-logo img {
  filter: invert(1);
}

[data-md-color-scheme="default"] .md-header__button.md-logo img {
  filter: none;
}

/* ═══════════════════════════════════════════════════════
   HERO SECTION — Large Centered Logo
   ═══════════════════════════════════════════════════════ */
.md-typeset .hero {
  text-align: center;
  padding: 3rem 1.5rem 2.5rem;
  margin-bottom: 2rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Large centered logo */
.md-typeset .hero-logo {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 2rem;
}

.md-typeset .hero-logo-img {
  width: 140px;
  height: 140px;
  opacity: 0.9;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.md-typeset .hero-logo-img:hover {
  transform: scale(1.05);
  opacity: 1;
}

/* Invert hero logo in dark mode */
[data-md-color-scheme="slate"] .md-typeset .hero-logo-img {
  filter: invert(1);
}

/* Title */
.md-typeset .hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--oa-text-primary);
  margin-top: 0;
  margin-bottom: 0.3rem;
}

[data-md-color-scheme="slate"] .md-typeset .hero h1 {
  color: #ffffff;
}

/* Subtitle & description */
.md-typeset .hero p {
  font-size: 1.15rem;
  color: var(--oa-text-secondary);
  max-width: 600px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}

.md-typeset .hero strong {
  color: var(--oa-text-primary);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

/* ─── Button Group ─── */
.md-typeset .hero-buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.md-typeset .hero-buttons .md-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 2.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.md-typeset .hero-buttons .md-button--primary {
  background: #000000 !important;
  border: 2px solid #000000 !important;
  color: #ffffff !important;
}

[data-md-color-scheme="slate"] .md-typeset .hero-buttons .md-button--primary {
  background: #ffffff !important;
  border-color: #ffffff !important;
  color: #000000 !important;
}

.md-typeset .hero-buttons .md-button--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

[data-md-color-scheme="slate"] .md-typeset .hero-buttons .md-button--primary:hover {
  box-shadow: 0 6px 20px rgba(255,255,255,0.15);
}

.md-typeset .hero-buttons .md-button:not(.md-button--primary) {
  background: transparent !important;
  border: 2px solid var(--oa-border) !important;
  color: var(--oa-text-primary) !important;
}

.md-typeset .hero-buttons .md-button:not(.md-button--primary):hover {
  border-color: var(--oa-text-secondary) !important;
  background: var(--oa-hover-bg) !important;
  transform: translateY(-2px);
}

/* ─── Feature Cards ─── */
.md-typeset .feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 3rem auto;
  max-width: 1100px;
  padding: 0 1rem;
}

.md-typeset .feature-card {
  padding: 1.75rem;
  border-radius: 10px;
  border: 1px solid var(--oa-border);
  background: var(--oa-card-bg);
  transition: all 0.25s ease;
}

.md-typeset .feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.08);
  border-color: var(--oa-text-muted);
}

[data-md-color-scheme="slate"] .md-typeset .feature-card:hover {
  box-shadow: 0 8px 30px rgba(255,255,255,0.04);
}

.md-typeset .feature-card h3 {
  margin-top: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--oa-text-primary);
}

.md-typeset .feature-card p {
  font-size: 0.88rem;
  color: var(--oa-text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ─── Content Typography ─── */
.md-typeset h1 {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--oa-text-primary);
}

.md-typeset h2 {
  font-weight: 700;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--oa-border);
  padding-bottom: 0.5rem;
}

.md-typeset h3 { font-weight: 600; }

/* ─── Code Blocks ─── */
.md-typeset code { border-radius: 4px; font-size: 0.85em; }
.md-typeset pre { border-radius: 8px; border: 1px solid var(--oa-border); }

/* ─── Tables ─── */
.md-typeset table:not([class]) {
  border: 1px solid var(--oa-border);
  border-radius: 8px;
  overflow: hidden;
  width: 100%;
}

.md-typeset table:not([class]) th {
  background: var(--oa-surface);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--oa-text-muted);
}

/* ─── Admonitions ─── */
.md-typeset .admonition {
  border-radius: 8px;
  border-width: 1px;
  border-left-width: 4px;
}

/* ─── Footer ─── */
.md-footer {
  background: #000000;
  border-top: 1px solid #222;
}

[data-md-color-scheme="default"] .md-footer {
  background: #fafafa;
  border-top: 1px solid #eee;
}

/* ─── Misc ─── */
.md-typeset hr { border-color: var(--oa-border); }
.md-nav__link--active { font-weight: 600; }

[data-md-color-scheme="slate"] .md-search__input {
  background: #1a1a1a;
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE — Cross-Platform
   ═══════════════════════════════════════════════════════ */

/* Tablet */
@media screen and (max-width: 960px) {
  .md-typeset .hero h1 {
    font-size: 2.8rem;
  }

  .md-typeset .hero-logo-img {
    width: 120px;
    height: 120px;
  }

  .md-typeset .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .md-typeset .hero-buttons .md-button {
    padding: 0.7rem 1.8rem;
    font-size: 0.9rem;
  }
}

/* Mobile */
@media screen and (max-width: 600px) {
  .md-typeset .hero {
    padding: 2rem 1rem 1.5rem;
  }

  .md-typeset .hero h1 {
    font-size: 2.2rem;
  }

  .md-typeset .hero p {
    font-size: 1rem;
  }

  .md-typeset .hero-logo-img {
    width: 100px;
    height: 100px;
  }

  .md-typeset .hero-buttons {
    flex-direction: column;
    gap: 0.75rem;
  }

  .md-typeset .hero-buttons .md-button {
    width: 100%;
    justify-content: center;
    padding: 0.8rem 1.5rem;
  }

  .md-typeset .feature-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .md-typeset .feature-card {
    padding: 1.25rem;
  }

  /* Better table scrolling on mobile */
  .md-typeset__scrollwrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* Small mobile */
@media screen and (max-width: 400px) {
  .md-typeset .hero h1 {
    font-size: 1.8rem;
  }

  .md-typeset .hero-logo-img {
    width: 80px;
    height: 80px;
  }
}

/* Touch device improvements */
@media (hover: none) {
  .md-typeset .feature-card:hover {
    transform: none;
    box-shadow: none;
  }

  .md-typeset .hero-buttons .md-button:active {
    transform: scale(0.97);
  }
}