/* STS Arena Documentation Styles */
/* Clean modern design with light/dark mode support */

:root {
  /* Light mode colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #6c757d;
  --border-color: #dee2e6;
  --accent-color: #0d6efd;
  --accent-hover: #0b5ed7;
  --code-bg: #f1f3f5;
  --shadow: rgba(0, 0, 0, 0.1);
  --screenshot-border: #dee2e6;
}

[data-theme="dark"] {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --text-primary: #e8e8e8;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  --border-color: #3a3a5c;
  --accent-color: #4dabf7;
  --accent-hover: #74c0fc;
  --code-bg: #0f3460;
  --shadow: rgba(0, 0, 0, 0.3);
  --screenshot-border: #4a4a6c;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo span {
  color: var(--accent-color);
}

/* Theme toggle */
.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

/* Navigation */
nav {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

nav a:hover {
  color: var(--accent-color);
}

/* Hero section */
.hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  padding: 60px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Main content */
main {
  padding: 40px 0;
}

/* Sections */
section {
  margin-bottom: 60px;
}

section h2 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent-color);
}

section h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

section p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
}

.feature-card h3 {
  margin-top: 0;
  color: var(--accent-color);
}

/* Screenshots */
.screenshot-container {
  margin: 24px 0;
}

.screenshot {
  display: block;
  max-width: 100%;
  border: 1px solid var(--screenshot-border);
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--shadow);
  transition: transform 0.2s ease;
}

.screenshot:hover {
  transform: scale(1.02);
  cursor: pointer;
}

.screenshot-caption {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 8px;
  font-style: italic;
}

/* Screenshot gallery */
.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
  margin: 24px 0;
}

.gallery-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  display: block;
}

.gallery-item figcaption {
  padding: 12px 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Code blocks */
code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 0.9em;
  color: var(--accent-color);
}

pre {
  background: var(--code-bg);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* Lists */
ul, ol {
  margin: 16px 0;
  padding-left: 24px;
  color: var(--text-secondary);
}

li {
  margin-bottom: 8px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
}

td {
  color: var(--text-secondary);
}

tr:hover {
  background: var(--bg-secondary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 20px;
  background: var(--accent-color);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: background 0.2s ease;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
}

/* Alerts/notes */
.note {
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-color);
  padding: 16px;
  margin: 24px 0;
  border-radius: 0 8px 8px 0;
}

.note p {
  margin: 0;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  margin-top: 60px;
}

.footer-content {
  text-align: center;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 16px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

/* Modal for full-size screenshots */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  cursor: pointer;
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal img {
  max-width: 95%;
  max-height: 95%;
  border-radius: 4px;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2rem;
  color: white;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 16px;
  }

  nav ul {
    justify-content: center;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .screenshot-gallery {
    grid-template-columns: 1fr;
  }

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

/* Keyboard navigation indicators */
*:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  header, nav, footer, .theme-toggle {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .screenshot {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}