/* Custom Theme Overrides - Event Documentation Site */

:root {
  /* Core brand */
  --primary-color: #5b4bff; /* Mystic violet-purple */
  --primary-color-soft: #6f5cff; /* Hover / soft states */
  --accent-color: #ff6b35; /* Warm ember accent */
  --accent-soft: rgba(255, 107, 53, 0.14);

  /* Surface + neutrals */
  --page-bg: #f6f5fb;
  --surface-elevated: #ffffff;
  --surface-soft: #f0eef8;
  --border-color: #e0def0;
  --border-subtle: #ebe9f5;
  --text-main: #1f2933;
  --text-soft: #4b5563;
  --text-muted: #6b7280;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-sm: 4px;
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.06);
  --shadow-subtle: 0 4px 14px rgba(15, 23, 42, 0.04);

  /* Typography */
  --font-sans:
    system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text', -system-ui,
    -ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;

  /* Layout */
  --content-max-width: 72rem;
}

/* Base layout and typography */

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-main);
  background-color: var(--page-bg);
}

/* Constrain main reading width for comfort */
.book-page,
.book-article,
.markdown,
article {
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  color: var(--text-main);
}

/* Paragraphs */
p {
  color: var(--text-main);
  line-height: 1.8;
  margin: 1rem 0 1.25rem;
}

/* Article text elements */
article p,
article li,
article div,
article span {
  color: var(--text-main);
}

/* (Deprecated overrides removed: main content now uses design tokens in :root) */

/* Paragraph text already styled above using tokens; extra overrides removed */

/* Article text elements already styled with design tokens; redundant !important removed */

/* Sidebar / navigation */

.book-menu {
  /* High-contrast, accessible sidebar:
     - Deep indigo base
     - Lighter inner gradient for sufficient contrast with violet links */
  background:
    radial-gradient(
      circle at top left,
      rgba(120, 117, 255, 0.2),
      transparent 55%
    ),
    radial-gradient(
      circle at bottom,
      rgba(255, 140, 90, 0.14),
      transparent 55%
    ),
    #0b1020;
  border-right: 1px solid rgba(148, 163, 253, 0.22);
  box-shadow: 6px 0 22px rgba(2, 6, 23, 0.86);
}

/* Subtle vertical glow bar */
.book-menu::before {
  content: '';
  position: absolute;
  top: 18px;
  left: 0;
  width: 3px;
  height: calc(100% - 36px);
  background: linear-gradient(
    to bottom,
    rgba(111, 92, 255, 0),
    rgba(111, 92, 255, 0.7),
    rgba(255, 107, 53, 0)
  );
  border-radius: 999px;
  opacity: 0.85;
}

/* Layout + spacing */
.book-menu-content {
  padding: 1.4rem 1.1rem 1.6rem;
}

/* Brand */
.book-brand {
  padding: 0 0.35rem 0.8rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid rgba(148, 163, 253, 0.18);
}

.book-brand a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.book-brand span {
  font-weight: 660;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.82rem;
  color: #c7d2ff;
}

/* Section labels (top-level) */
.book-menu-content nav > ul > li > label,
.book-menu-content nav > ul > li > a {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(156, 163, 255, 0.82);
  padding: 0.55rem 0.55rem 0.35rem;
}

/* Link base style */
.book-menu a {
  position: relative;
  display: block;
  /* Brightened to meet contrast against #0b1020 */
  color: #f9fafb;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  transition:
    background-color 0.18s ease,
    color 0.18s ease,
    padding-left 0.18s ease,
    box-shadow 0.18s ease,
    transform 0.16s ease;
  font-size: 0.92rem;
}

/* Hover state */
.book-menu a:hover {
  background-color: rgba(26, 35, 72, 1);
  padding-left: 0.85rem;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(2, 6, 23, 0.7);
  transform: translateX(1px);
}

/* Active state across levels */
.book-menu-content nav > ul > li.active > a,
.book-menu-content nav a.active {
  background:
    radial-gradient(circle at left, rgba(111, 92, 255, 0.55), transparent 70%),
    #141a33;
  border-left: 3px solid var(--accent-color);
  padding-left: 0.95rem;
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.9);
}

/* Active item subtle glyph */
.book-menu-content nav a.active::before {
  content: '●';
  font-size: 0.5rem;
  color: var(--accent-color);
  margin-right: 0.25rem;
}

/* Nested (child) links */
.book-menu-content nav ul ul a {
  font-size: 0.88rem;
  /* Slightly brighter for legibility on dark */
  color: rgba(226, 232, 255, 0.96);
  padding-left: 1.2rem;
}

.book-menu-content nav ul ul a:hover {
  padding-left: 1.4rem;
}

/* Icon-style prefix for leaf links (optional, subtle) */
.book-menu-content nav ul ul a::before {
  content: '⋅';
  display: inline-block;
  margin-right: 0.18rem;
  color: rgba(148, 163, 253, 0.82);
}

/* Keep sidebar polished on small screens too */
@media (max-width: 768px) {
  .book-menu {
    box-shadow: 8px 0 26px rgba(0, 0, 0, 0.95);
  }
}

/* Legacy sidebar hover style removed in favor of unified states above */

/* Active state normalized above */

/* Top header */

.book-header {
  background: radial-gradient(
    circle at top,
    #6f5cff 0%,
    #3b2fa8 55%,
    #18122b 100%
  );
  color: #f9fafb;
  padding: 1.4rem 1.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.24);
}

.book-header-title {
  font-size: 1.6rem;
  font-weight: 650;
  letter-spacing: 0.04em;
}

/* Duplicate header title style removed; using the unified definition above */

/* Main content surface */

.book-page {
  background: var(--surface-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding-bottom: 2.5rem;
}

/* Tables */

table {
  border-collapse: collapse;
  width: 100%;
  margin: 2rem 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

table thead {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

table th,
table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

table tbody tr {
  transition: background-color 0.3s ease;
}

table tbody tr:hover {
  background-color: var(--surface-soft);
}

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

/* Headings */

h1,
h2,
h3,
h4,
h5,
h6 {
  color: #0a0e27;
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  letter-spacing: 0.01em;
}

h1 {
  font-size: 2.4rem;
  border-bottom: 3px solid var(--accent-color);
  padding-bottom: 0.4rem;
}

h2 {
  font-size: 1.8rem;
  color: var(--primary-color);
  border-left: 4px solid var(--accent-color);
  padding-left: 0.9rem;
}

h3 {
  font-size: 1.35rem;
  color: var(--text-main);
}

h4,
h5,
h6 {
  font-size: 1.05rem;
  color: var(--text-soft);
  text-transform: none;
}

/* Links */

a {
  color: var(--primary-color);
  text-decoration: none;
  transition:
    color 0.22s ease,
    background-color 0.22s ease,
    box-shadow 0.22s ease,
    transform 0.18s ease;
  font-weight: 500;
}

a:hover {
  color: var(--accent-color);
  text-decoration: underline;
}

/* Lists */

ul,
ol {
  margin: 1.25rem 0 1.5rem;
  padding-left: 1.8rem;
}

li {
  margin: 0.3rem 0;
  line-height: 1.8;
  color: var(--text-main);
}

/* Strong/bold text */

strong,
b {
  color: var(--text-main);
  font-weight: 650;
}

/* TOC contrast fix - applies universally for readability on purple gradient header */
/* Targets both desktop TOC and mobile header TOC */
.book-toc a,
.book-header aside a {
  color: #e5f0ff !important; /* Very light blue-white for contrast on purple gradient and dark backgrounds */
  font-weight: 500; /* Slightly bolder for better visibility */
}

.book-toc a:hover,
.book-header aside a:hover {
  color: #ffffff !important; /* Pure white on hover */
  text-decoration: underline;
}

/* Dark mode (balanced, not over-forced) */

@media (prefers-color-scheme: dark) {
  :root {
    --page-bg: #050816;
    --surface-elevated: #0b1020;
    --surface-soft: #111827;
    --border-color: rgba(148, 163, 253, 0.24);
    --text-main: #e5e7ff;
    --text-soft: #cbd5f5;
    --text-muted: #9ca3c8;
    --shadow-soft: 0 14px 40px rgba(15, 23, 42, 0.72);
  }

  body {
    background-color: var(--page-bg);
    color: var(--text-main);
  }

  .book-page,
  .book-article,
  .markdown,
  article {
    background-color: var(--surface-elevated);
    color: var(--text-main);
  }

  .book-menu {
    box-shadow: 6px 0 22px rgba(0, 0, 0, 0.8);
  }

  table {
    background-color: #050816;
  }

  code {
    background-color: #0f172a;
    color: var(--accent-color);
  }

  pre {
    background-color: #020817;
    color: #e5e7ff;
  }
}

/* Blockquotes */

blockquote {
  border-left: 4px solid var(--accent-color);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  color: var(--text-soft);
  font-style: italic;
  background-color: var(--surface-soft);
  border-radius: var(--radius-md);
}

/* Code */

code {
  background: var(--surface-soft);
  border-radius: var(--radius-sm);
  padding: 0.18rem 0.42rem;
  font-family:
    'JetBrains Mono', 'SF Mono', Menlo, Monaco, Consolas, 'Liberation Mono',
    'Courier New', monospace;
  color: var(--accent-color);
}

pre {
  background: #111827;
  color: #e5e7ff;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: 1.5rem 0;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
}

/* Cards / grid sections */

.book-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
  margin: 2rem 0;
}

/* Inputs (search / text) */

input[type='search'],
input[type='text'],
input[type='email'],
textarea {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.7rem 0.9rem;
  font-size: 0.98rem;
  transition:
    border-color 0.22s ease,
    box-shadow 0.22s ease,
    background-color 0.2s ease;
}

input[type='search']:focus,
input[type='text']:focus,
input[type='email']:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color-soft);
  box-shadow: 0 0 0 3px rgba(111, 92, 255, 0.18);
  background-color: #ffffff;
}

/* Primary buttons */

button,
.button,
.btn-primary {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--primary-color-soft) 100%
  );
  color: #ffffff;
  border: none;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  transition:
    transform 0.18s ease,
    box-shadow 0.22s ease,
    background 0.22s ease;
  font-size: 0.98rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

button:hover,
.button:hover,
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.35);
}

/* Subtle / ghost button */
.btn-ghost {
  background: transparent;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 0.65rem 1.4rem;
  color: var(--text-main);
}

.btn-ghost:hover {
  background-color: var(--surface-soft);
  border-color: var(--primary-color-soft);
}

/* Footer */

.book-footer {
  background: radial-gradient(circle at top, #18122b, #050816);
  color: #9ca3c8;
  text-align: center;
  padding: 1.75rem 1rem 2.25rem;
  border-top: 1px solid rgba(148, 163, 253, 0.24);
  margin-top: 3rem;
}

.book-footer a {
  color: var(--accent-color);
}

.book-footer a:hover {
  color: #ffffff;
}

/* Responsive refinements */

@media (max-width: 1024px) {
  .book-page,
  .book-article,
  .markdown,
  article {
    margin: 1.25rem 1rem 2rem;
    box-shadow: 0 5px 18px rgba(15, 23, 42, 0.12);
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.9rem;
  }

  h2 {
    font-size: 1.45rem;
  }

  .book-page,
  .book-article,
  .markdown,
  article {
    margin: 1.1rem 0.75rem 1.8rem;
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }
}

/* Print-friendly */
@media print {
  .book-menu,
  .book-header,
  .book-footer {
    display: none;
  }

  a {
    color: inherit;
  }
}