/* Atlas Documentation & Technical Reference Stylesheet
   Vylex Technologies Design System
*/

:root {
  --bg-color: var(--site-bg, #051B38);
  --bg-gradient: var(--site-bg-gradient, linear-gradient(135deg, #051B38 0%, #031227 100%));
  --surface-1: var(--site-surface-1, rgba(10, 46, 92, 0.45));
  --surface-2: var(--site-surface-2, rgba(13, 56, 112, 0.35));
  --surface-hover: var(--site-surface-hover, rgba(18, 70, 138, 0.5));
  --card-border: var(--site-card-border, rgba(255, 255, 255, 0.09));
  --card-border-focus: var(--site-card-border-focus, rgba(251, 169, 25, 0.4));
  --text-primary: var(--site-text-primary, #F8FAFC);
  --text-secondary: var(--site-text-secondary, #CBD5E1);
  --text-muted: var(--site-text-muted, #94A3B8);
  --accent: var(--site-accent, #FBA919);
  --accent-hover: var(--site-accent-hover, #D97706);
  --accent-glow: var(--site-accent-glow, rgba(251, 169, 25, 0.15));
  --code-bg: var(--site-code-bg, #020B18);
  --radius-sm: var(--site-radius-sm, 6px);
  --radius-md: var(--site-radius-md, 10px);
  --radius-lg: var(--site-radius-lg, 14px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg-gradient);
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.btn-primary {
  background: var(--accent);
  color: #031227 !important;
  font-weight: 700;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  transition: background 0.2s ease, transform 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* Documentation Hero */
.docs-hero {
  padding: 3.5rem 0 2rem;
  border-bottom: 1px solid var(--card-border);
}

.docs-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.docs-breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.docs-breadcrumb a:hover {
  color: var(--accent);
}

.docs-hero-title {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.docs-hero-lead {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 800px;
  line-height: 1.6;
}

/* Search Bar in Docs */
.docs-search-bar {
  margin-top: 1.75rem;
  max-width: 580px;
  position: relative;
}

.docs-search-input {
  width: 100%;
  background: var(--surface-1);
  border: 1px solid var(--card-border);
  padding: 0.85rem 1.1rem 0.85rem 2.75rem;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.docs-search-input:focus {
  border-color: var(--card-border-focus);
  background: rgba(10, 46, 92, 0.6);
}

.docs-search-icon {
  position: absolute;
  left: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.docs-search-kbd {
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Documentation Layout: Sidebar + Content */
.docs-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 3.5rem;
  padding: 2.5rem 0 5rem;
  align-items: start;
}

/* Sidebar TOC */
.docs-sidebar {
  position: sticky;
  top: 5.5rem;
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  padding-right: 1rem;
}

.docs-sidebar::-webkit-scrollbar {
  width: 4px;
}
.docs-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.sidebar-group {
  margin-bottom: 1.75rem;
}

.sidebar-heading {
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  padding-left: 0.5rem;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 0.2rem;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.65rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.sidebar-nav a:hover {
  background: var(--surface-2);
  color: var(--text-primary);
}

.sidebar-nav a.active {
  background: rgba(251, 169, 25, 0.12);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-count-badge {
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.7rem;
  font-family: var(--font-mono);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: var(--text-muted);
}

/* Main Content Stream */
.docs-content {
  min-width: 0;
}

.docs-section {
  margin-bottom: 4rem;
  scroll-margin-top: 6rem;
}

.section-header {
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--card-border);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-description {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.6;
}

/* Model Cards Grid */
.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.model-card {
  background: var(--surface-1);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.model-card:hover {
  border-color: var(--card-border-focus);
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.model-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.model-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.model-badge {
  background: rgba(251, 169, 25, 0.12);
  border: 1px solid rgba(251, 169, 25, 0.3);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.model-id {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: block;
  word-break: break-all;
}

.model-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.model-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--card-border);
}

.meta-pill {
  background: rgba(255, 255, 255, 0.05);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  color: var(--text-muted);
}

/* Modes Grid */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.mode-card {
  background: var(--surface-1);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  transition: all 0.2s ease;
}

.mode-card:hover {
  border-color: var(--card-border-focus);
  transform: translateY(-2px);
}

.mode-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.mode-icon-box {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(251, 169, 25, 0.1);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mode-card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.mode-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 0.85rem;
}

.mode-prompt-hint {
  background: var(--code-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Tools Directory */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.tool-card {
  background: var(--surface-1);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all 0.2s ease;
}

.tool-card:hover {
  border-color: var(--card-border-focus);
}

.tool-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.tool-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tool-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(251, 169, 25, 0.1);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.tool-fn-name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  background: rgba(251, 169, 25, 0.08);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  display: inline-block;
  margin-top: 0.2rem;
}

.tool-category-badge {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-family: var(--font-mono);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  border: 1px solid var(--card-border);
}

.tool-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.1rem;
}

.tool-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--card-border);
  background: rgba(0, 0, 0, 0.15);
  margin: 0 -1.5rem -1.5rem;
  padding: 1rem 1.5rem;
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.detail-block-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
}

.detail-pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.trigger-pill {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

/* Code & Tech Specs */
.tech-spec-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  margin-top: 0;
  font-size: 0.9rem;
}

.table-responsive {
  margin: 1.25rem 0;
}

.tech-spec-table th,
.tech-spec-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
}

.tech-spec-table th {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--surface-1);
}

.tech-spec-table td {
  color: var(--text-secondary);
}

.tech-spec-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.code-block {
  background: var(--code-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: #E2E8F0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 1rem;
}

/* Mobile Table of Contents Bar */
.docs-mobile-toc-bar {
  display: none;
  position: sticky;
  top: var(--site-header-height, 68px);
  z-index: 900;
  background: rgba(3, 18, 39, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  padding: 0.65rem 0;
  margin-bottom: 1.5rem;
}

.mobile-toc-toggle-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-1);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
  min-height: 44px;
}

.mobile-toc-toggle-btn:hover {
  background: var(--surface-hover);
  border-color: var(--card-border-focus);
}

.mobile-toc-toggle-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mobile-toc-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
}

.mobile-toc-current {
  color: var(--text-secondary);
  font-size: 0.82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 170px;
}

.mobile-toc-chevron {
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  flex-shrink: 0;
  color: var(--text-muted);
}

.mobile-toc-toggle-btn[aria-expanded="true"] .mobile-toc-chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.mobile-toc-dropdown {
  display: none;
  margin-top: 0.6rem;
  background: rgba(3, 18, 39, 0.98);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  max-height: 60vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.mobile-toc-dropdown.active {
  display: block;
}

.mobile-toc-dropdown .sidebar-group {
  margin-bottom: 1.25rem;
}

.mobile-toc-dropdown .sidebar-group:last-child {
  margin-bottom: 0;
}

.mobile-toc-dropdown .sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.mobile-toc-dropdown .sidebar-nav a {
  padding: 0.65rem 0.75rem;
  font-size: 0.92rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* Floating Back to Top Button */
.docs-back-to-top {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(10, 46, 92, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 950;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, background 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.docs-back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.docs-back-to-top:hover {
  background: var(--accent);
  color: #031227;
  border-color: var(--accent);
  transform: translateY(-2px);
}

.docs-back-to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .docs-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 1rem 0 4rem;
  }

  .docs-sidebar {
    display: none;
  }

  .docs-mobile-toc-bar {
    display: block;
  }

  .docs-hero-title {
    font-size: clamp(2rem, 5.5vw, 2.5rem);
  }
}

@media (max-width: 768px) {
  .docs-hero {
    padding: 2.5rem 0 1.5rem;
  }

  .docs-hero-title {
    font-size: clamp(1.85rem, 5vw, 2.3rem);
    letter-spacing: -0.5px;
  }

  .docs-hero-lead {
    font-size: 1rem;
    line-height: 1.55;
  }

  .models-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .modes-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .section-title {
    font-size: 1.55rem;
  }

  .docs-section {
    margin-bottom: 3rem;
  }
}

@media (max-width: 640px) {
  .tool-card {
    padding: 1.15rem;
  }

  .tool-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .tool-details-grid {
    grid-template-columns: 1fr;
    margin: 0 -1.15rem -1.15rem;
    padding: 0.85rem 1.15rem;
  }

  .trigger-pill {
    word-break: break-word;
  }

  .docs-search-bar {
    margin-top: 1.25rem;
  }

  .docs-search-input {
    font-size: 1rem;
    padding-right: 2rem;
  }

  .docs-search-kbd {
    display: none;
  }
}

@media (max-width: 480px) {
  .docs-breadcrumb {
    font-size: 0.76rem;
    gap: 0.35rem;
  }

  .section-tag {
    font-size: 0.7rem;
  }

  .model-card,
  .mode-card {
    padding: 1.15rem;
  }

  .docs-back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
  }
}