/* Modulate Design System */

/* --- Section A: CSS Custom Properties --- */
:root {
  --mod-blue: #127ac5;
  --mod-red: #fa3d4f;
  --mod-navy: #12113d;
  --mod-indigo: #6366f1;
  --mod-text: #141432;
  --mod-surface: #f2f2f6;
  --mod-surface-light: #f9f9fb;
  --mod-border: rgba(220, 220, 230, 0.5);
  --mod-focus-ring: #4d65ff;
  --mod-card-bg: #ffffff;
  --mod-card-radius: 0.5em;
  --mod-card-shadow: 0 1px 3px rgba(18, 17, 61, 0.08);
  --mod-card-shadow-hover: 0 4px 12px rgba(18, 17, 61, 0.12);
  --mod-btn-radius: 0.375rem;
  --mod-transition: cubic-bezier(0.215, 0.61, 0.355, 1);
  --mod-font:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mod-hero-gradient: linear-gradient(90deg, #12113d, #127ac5);
  /* Bootstrap overrides */
  --bs-primary: #127ac5;
  --bs-body-font-family:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --bs-body-bg: var(--mod-surface-light);
  --bs-body-color: var(--mod-text);
  --bs-link-color: var(--mod-blue);
  --bs-border-color: var(--mod-border);
}

/* --- Section B: Bootstrap Component Overrides --- */
body {
  font-family: var(--mod-font);
  background-color: var(--mod-surface-light);
  color: var(--mod-text);
  line-height: 1.75;
}
.card {
  background: var(--mod-card-bg);
  border: 1px solid var(--mod-border);
  border-radius: var(--mod-card-radius);
  box-shadow: var(--mod-card-shadow);
  transition:
    box-shadow 0.25s var(--mod-transition),
    transform 0.25s var(--mod-transition);
}
.card-hover:hover {
  box-shadow: var(--mod-card-shadow-hover);
  transform: scale(1.03);
}
.btn-primary {
  --bs-btn-bg: #0b5ea2;
  --bs-btn-border-color: #0b5ea2;
  --bs-btn-hover-bg: #094a82;
  --bs-btn-hover-border-color: #094a82;
  border-radius: var(--mod-btn-radius);
}
.btn-outline-primary {
  --bs-btn-color: var(--mod-blue);
  --bs-btn-border-color: var(--mod-blue);
  --bs-btn-hover-bg: var(--mod-blue);
  --bs-btn-hover-border-color: var(--mod-blue);
  border-radius: var(--mod-btn-radius);
}
.btn-cta {
  background-color: var(--mod-red);
  border-color: var(--mod-red);
  color: #fff;
  border-radius: var(--mod-btn-radius);
}
.btn-cta:hover {
  background-color: #e0323f;
  border-color: #e0323f;
  color: #fff;
}
.btn-secondary {
  border-radius: var(--mod-btn-radius);
}
.btn-danger {
  border-radius: var(--mod-btn-radius);
}
.btn > .bi {
  font-size: 1.15em;
  vertical-align: -0.1em;
  margin-right: 0.15em;
}
.form-control,
.form-select {
  border-radius: 0;
}
.form-control:focus,
.form-select:focus {
  border-color: var(--mod-focus-ring);
  box-shadow: 0 0 0 0.2rem rgba(77, 101, 255, 0.25);
}
.nav-tabs .nav-link.active {
  border-bottom-color: var(--mod-blue);
  color: var(--mod-blue);
}
.navbar .nav-link.active {
  font-weight: 600;
  border-bottom: 2px solid var(--mod-blue);
}

/* --- Section C: Utility Styles --- */
#alert-container {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1080;
  width: 90%;
  max-width: 600px;
}
.auth-card {
  max-width: 420px;
  margin: 2rem auto;
}
.auth-brand {
  text-align: center;
  padding: 2rem 0 1rem;
}
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  border-radius: inherit;
}
.bg-orange {
  background-color: #fd7e14 !important;
}
.page-description {
  color: var(--mod-text);
  opacity: 0.75;
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 720px;
  margin-bottom: 1.5rem;
}
.empty-state {
  padding: 3rem 1rem;
  text-align: center;
}
.empty-state .bi {
  font-size: 2.5rem;
  color: var(--mod-blue);
  display: block;
  margin-bottom: 0.75rem;
}
.empty-state p {
  max-width: 400px;
  margin: 0 auto 1rem;
}

/* --- Section D: Landing Page Styles --- */
.hero {
  background: var(--mod-hero-gradient);
  color: #fff;
  padding: 5rem 0;
}
.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
}
@media (min-width: 768px) {
  .hero h1 {
    font-size: 4rem;
  }
}
.hero .lead {
  font-size: 1.25rem;
  font-weight: 300;
  opacity: 0.9;
}
.product-card {
  border: 1px solid var(--mod-border);
  border-radius: var(--mod-card-radius);
  padding: 2rem;
  transition:
    box-shadow 0.25s var(--mod-transition),
    transform 0.25s var(--mod-transition);
}
.product-card:hover {
  box-shadow: var(--mod-card-shadow-hover);
  transform: scale(1.03);
}
.cta-band {
  background-color: var(--mod-navy);
  color: #fff;
  padding: 4rem 0;
  text-align: center;
}

/* --- Section E: Documentation Page Styles --- */
.docs-hero {
  background: var(--mod-hero-gradient);
  color: #fff;
  padding: 3rem 0;
}
.docs-hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
}
.docs-hero .lead {
  font-size: 1.1rem;
  font-weight: 300;
  opacity: 0.9;
}
.model-card {
  border: 1px solid var(--mod-border);
  border-radius: var(--mod-card-radius);
  padding: 1.5rem;
  background: var(--mod-card-bg);
  height: 100%;
  transition:
    box-shadow 0.25s var(--mod-transition),
    transform 0.25s var(--mod-transition);
}
.model-card:hover {
  box-shadow: var(--mod-card-shadow-hover);
  transform: scale(1.02);
}
.model-card .model-card-icon {
  font-size: 2rem;
  color: var(--mod-blue);
}
.code-tabs .nav-link {
  font-size: 0.85rem;
  padding: 0.35rem 0.75rem;
}
.docs-code {
  background-color: var(--mod-navy);
  color: #a5d6ff;
  border: none;
  border-radius: var(--mod-card-radius);
  padding: 1.25rem;
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-x: auto;
}
.feature-table th {
  background-color: var(--mod-surface);
  font-weight: 600;
  font-size: 0.9rem;
}
.feature-table td {
  font-size: 0.9rem;
  vertical-align: middle;
}
.project-card {
  border: 1px solid var(--mod-border);
  border-radius: var(--mod-card-radius);
  padding: 1.5rem;
  background: var(--mod-card-bg);
  height: 100%;
  transition:
    box-shadow 0.25s var(--mod-transition),
    transform 0.25s var(--mod-transition);
}
.project-card:hover {
  box-shadow: var(--mod-card-shadow-hover);
  transform: scale(1.02);
}

/* --- Section F: Searchable Dropdown --- */
.searchable-dropdown {
  position: relative;
}
.searchable-dropdown input {
  padding-right: 2rem;
}
.searchable-dropdown-clear {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--mod-text);
  opacity: 0.5;
  cursor: pointer;
  padding: 0 0.25rem;
}
.searchable-dropdown-clear:hover {
  opacity: 1;
}
.searchable-dropdown-list {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: 200px;
  overflow-y: auto;
  background: var(--mod-card-bg);
  border: 1px solid var(--mod-border);
  border-top: none;
  z-index: 100;
}
.searchable-dropdown-item {
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
}
.searchable-dropdown-item:hover {
  background-color: var(--mod-surface);
}

/* --- Section G: Model Sidebar & Doc Viewer --- */
.model-sidebar {
  max-height: calc(100vh - 200px);
  overflow-y: auto;
}
.model-item {
  cursor: pointer;
}
.model-item:hover {
  background-color: var(--mod-surface);
}
.model-item.active {
  background-color: #e3f0fb;
  border-left: 3px solid var(--mod-blue);
}
.doc-content pre {
  background: var(--mod-surface);
  border: 1px solid var(--mod-border);
  border-radius: 0.375rem;
  padding: 1rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.copy-btn {
  color: var(--mod-blue);
  opacity: 0.5;
  transition: opacity 0.15s;
  vertical-align: middle;
  text-decoration: none;
}
.copy-btn:hover {
  opacity: 1;
}
.markdown-body {
  line-height: 1.7;
}
.markdown-body h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}
.markdown-body h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  border-bottom: 1px solid var(--mod-border);
  padding-bottom: 0.3em;
}
.markdown-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 1.25em;
  margin-bottom: 0.5em;
}
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  font-weight: 600;
  margin-top: 1.25em;
  margin-bottom: 0.5em;
}
.markdown-body p {
  margin-bottom: 1em;
}
.markdown-body pre code.hljs {
  background: transparent;
}
.markdown-body :not(pre) > code {
  background: var(--mod-surface);
  padding: 0.15em 0.4em;
  border-radius: 0.25rem;
  font-size: 0.875em;
}
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1em;
}
.markdown-body th,
.markdown-body td {
  border: 1px solid var(--mod-border);
  padding: 0.5em 0.75em;
}
.markdown-body th {
  background: var(--mod-surface);
  font-weight: 600;
}
.markdown-body ul,
.markdown-body ol {
  padding-left: 2em;
  margin-bottom: 1em;
}
.markdown-body blockquote {
  border-left: 3px solid var(--mod-blue);
  padding-left: 1em;
  color: #555;
  margin: 1em 0;
}
.markdown-body a {
  color: var(--mod-blue);
}
.markdown-body img {
  max-width: 100%;
}
.markdown-body hr {
  border: none;
  border-top: 1px solid var(--mod-border);
  margin: 1.5em 0;
}

/* --- Section H: Leaderboard Cards --- */
.leaderboard-tabs .btn {
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
}
.leaderboard-tabs .btn.active {
  font-weight: 600;
}
.leaderboard-table {
  font-size: 0.85rem;
}
.leaderboard-table th {
  font-weight: 600;
  background-color: var(--mod-surface);
}
.leaderboard-table td,
.leaderboard-table th {
  padding: 0.35rem 0.5rem;
}