/* ============================================================
   Isaac Sim Tutorials - Custom Theme (NVIDIA-inspired)
   ============================================================ */

/* ---- NVIDIA Brand Colors ---- */
:root {
  --nvidia-green: #76b900;
  --nvidia-green-dark: #5a8f00;
  --nvidia-green-light: #8fd400;
  --nvidia-black: #1a1a1a;
  --nvidia-dark-gray: #2d2d2d;
  --nvidia-gray: #444444;
  --nvidia-light-gray: #e0e0e0;
  --nvidia-white: #f5f5f5;
  --card-bg-dark: #1e1e1e;
  --card-bg-light: #ffffff;
  --card-border-dark: #333333;
  --card-border-light: #e0e0e0;
}

/* ---- Material Theme Color Overrides ---- */

/* Dark mode (default) */
[data-md-color-scheme="slate"] {
  --md-primary-fg-color: var(--nvidia-green);
  --md-primary-fg-color--light: var(--nvidia-green-light);
  --md-primary-fg-color--dark: var(--nvidia-green-dark);
  --md-accent-fg-color: var(--nvidia-green);
  --md-default-bg-color: #121212;
  --md-default-fg-color: #e0e0e0;
  --md-default-fg-color--light: #b0b0b0;
  --md-typeset-a-color: var(--nvidia-green);
  --md-code-bg-color: #1e1e1e;
  --md-footer-bg-color: #0a0a0a;
  --md-footer-bg-color--dark: #000000;
}

/* Light mode */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: var(--nvidia-green);
  --md-primary-fg-color--light: var(--nvidia-green-light);
  --md-primary-fg-color--dark: var(--nvidia-green-dark);
  --md-accent-fg-color: var(--nvidia-green-dark);
  --md-typeset-a-color: var(--nvidia-green-dark);
}

/* ---- Header / Top Navigation ---- */
.md-header {
  background-color: var(--nvidia-black);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.md-header__title {
  font-weight: 700;
  letter-spacing: 0.5px;
}

.md-tabs {
  background-color: var(--nvidia-dark-gray);
  border-bottom: 2px solid var(--nvidia-green);
}

.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--nvidia-green) !important;
}

/* ---- Sidebar Navigation ---- */
.md-nav__link:hover {
  color: var(--nvidia-green) !important;
}

.md-nav__item--active > .md-nav__link {
  color: var(--nvidia-green) !important;
  font-weight: 600;
}

/* ---- Hero Section (Home Page) ---- */
.hero-section {
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
  border-left: 4px solid var(--nvidia-green);
  border-radius: 8px;
  padding: 3rem 2.5rem;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(118, 185, 0, 0.05));
  pointer-events: none;
}

[data-md-color-scheme="default"] .hero-section {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 50%, #f8f9fa 100%);
  border-left-color: var(--nvidia-green);
}

.hero-section h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
  color: #ffffff;
}

[data-md-color-scheme="default"] .hero-section h1 {
  color: #1a1a1a;
}

.hero-section p {
  font-size: 1.1rem;
  line-height: 1.7;
  color: #b0b0b0;
  max-width: 700px;
}

[data-md-color-scheme="default"] .hero-section p {
  color: #555555;
}

/* ---- Tutorial Cards Grid ---- */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.tutorial-card {
  background: var(--card-bg-dark);
  border: 1px solid var(--card-border-dark);
  border-radius: 8px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tutorial-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--nvidia-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.tutorial-card:hover {
  border-color: var(--nvidia-green);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(118, 185, 0, 0.15);
}

.tutorial-card:hover::before {
  transform: scaleX(1);
}

[data-md-color-scheme="default"] .tutorial-card {
  background: var(--card-bg-light);
  border-color: var(--card-border-light);
}

[data-md-color-scheme="default"] .tutorial-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.tutorial-card h3 {
  margin-top: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--nvidia-green);
}

.tutorial-card p {
  font-size: 0.9rem;
  color: #999;
  line-height: 1.6;
}

[data-md-color-scheme="default"] .tutorial-card p {
  color: #666;
}

.tutorial-card .card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

.tutorial-card .card-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--nvidia-green);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.tutorial-card .card-link:hover {
  color: var(--nvidia-green-light);
}

.tutorial-card .card-link::after {
  content: " \2192";
}

/* ---- Badge / Tag ---- */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

.badge-beginner {
  background: rgba(118, 185, 0, 0.15);
  color: var(--nvidia-green);
  border: 1px solid rgba(118, 185, 0, 0.3);
}

.badge-intermediate {
  background: rgba(255, 193, 7, 0.15);
  color: #ffc107;
  border: 1px solid rgba(255, 193, 7, 0.3);
}

.badge-advanced {
  background: rgba(244, 67, 54, 0.15);
  color: #f44336;
  border: 1px solid rgba(244, 67, 54, 0.3);
}

/* ---- Tutorial Reference Table ---- */
.tutorial-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5rem 0;
  border-radius: 8px;
  overflow: hidden;
}

.tutorial-table thead th {
  background: var(--nvidia-dark-gray);
  color: var(--nvidia-green);
  font-weight: 700;
  padding: 1rem 1.25rem;
  text-align: left;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--nvidia-green);
}

[data-md-color-scheme="default"] .tutorial-table thead th {
  background: #f0f0f0;
  color: var(--nvidia-green-dark);
}

.tutorial-table tbody td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--card-border-dark);
  vertical-align: top;
}

[data-md-color-scheme="default"] .tutorial-table tbody td {
  border-bottom-color: var(--card-border-light);
}

.tutorial-table tbody tr:hover {
  background: rgba(118, 185, 0, 0.05);
}

.tutorial-table tbody tr:last-child td {
  border-bottom: none;
}

.tutorial-table a {
  color: var(--nvidia-green);
  font-weight: 600;
  text-decoration: none;
}

.tutorial-table a:hover {
  text-decoration: underline;
}

/* ---- Admonition Customization ---- */
.md-typeset .admonition.nvidia,
.md-typeset details.nvidia {
  border-color: var(--nvidia-green);
}

.md-typeset .nvidia > .admonition-title,
.md-typeset .nvidia > summary {
  background-color: rgba(118, 185, 0, 0.1);
  border-color: var(--nvidia-green);
}

.md-typeset .nvidia > .admonition-title::before,
.md-typeset .nvidia > summary::before {
  background-color: var(--nvidia-green);
}

/* ---- Code Block Enhancements ---- */
.md-typeset code {
  border-radius: 4px;
}

.md-typeset pre > code {
  border-left: 3px solid var(--nvidia-green);
}

/* ---- Feature List ---- */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.feature-list li {
  padding: 0.75rem 1rem;
  background: var(--card-bg-dark);
  border-radius: 6px;
  border-left: 3px solid var(--nvidia-green);
  font-size: 0.9rem;
}

[data-md-color-scheme="default"] .feature-list li {
  background: var(--card-bg-light);
  border-left-color: var(--nvidia-green-dark);
}

/* ---- Step-by-step Tutorial Styling ---- */
.step {
  border-left: 3px solid var(--nvidia-green);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--card-bg-dark);
  border-radius: 0 8px 8px 0;
  position: relative;
}

[data-md-color-scheme="default"] .step {
  background: #fafafa;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--nvidia-green);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  margin-right: 0.75rem;
}

/* ---- Scroll to Top Button Enhancement ---- */
.md-top {
  background-color: var(--nvidia-green) !important;
  color: #fff !important;
}

/* ---- Footer ---- */
.md-footer {
  border-top: 2px solid var(--nvidia-green);
}

/* ---- Search Bar ---- */
.md-search__input {
  border-radius: 8px;
}

/* ---- Responsive ---- */
@media screen and (max-width: 768px) {
  .grid-container {
    grid-template-columns: 1fr;
  }

  .hero-section {
    padding: 2rem 1.5rem;
  }

  .hero-section h1 {
    font-size: 1.6rem;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }
}