/**
 * Zenlila Design System
 * Version: 1.0.0
 * Last Updated: January 25, 2026
 *
 * Shared CSS for all SpecialProjects tools.
 * Usage: <link rel="stylesheet" href="../zenlila-theme.css">
 *        or href="./zenlila-theme.css" from root
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
  /* Colors - Primary */
  --color-background: #f8f8f8;
  --color-surface: #fff;
  --color-surface-hover: #fafafa;
  --color-border: #e0e0e0;
  --color-accent: #E63946;

  /* Colors - Text */
  --color-text-primary: #000;
  --color-text-secondary: #666;
  --color-text-muted: #999;
  --color-text-light: #bbb;

  /* Colors - Semantic */
  --color-success-bg: #dcfce7;
  --color-success-text: #166534;
  --color-info-bg: #dbeafe;
  --color-info-text: #1e40af;
  --color-warning-bg: #ffedd5;
  --color-warning-text: #9a3412;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 40px;

  /* Layout */
  --max-width: 1200px;
  --header-padding: 16px 24px;
  --content-padding: 40px 24px;

  /* Transitions */
  --transition-fast: all 0.2s ease;
}

/* ============================================
   RESET & BASE
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  background: var(--color-background);
  color: var(--color-text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

/* ============================================
   LAYOUT
   ============================================ */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-main,
.container {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  padding: var(--content-padding);
}

/* ============================================
   HEADER
   ============================================ */
.app-header {
  background: var(--color-surface);
  padding: var(--header-padding);
  border-bottom: 1px solid var(--color-border);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo-image {
  width: 56px;
  height: 56px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}

.logo h1 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.logo p {
  font-size: 12px;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.page-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.page-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
}

h2 {
  font-size: 20px;
  font-weight: 600;
  margin: var(--spacing-2xl) 0 var(--spacing-lg) 0;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
}

h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   CARDS
   ============================================ */
.card,
.project-card,
.event-card,
.overview,
.toc,
.insights-section,
.quick-start {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xl);
  margin-bottom: 20px;
  transition: var(--transition-fast);
}

.card:hover,
.project-card:hover,
.event-card:hover,
.overview:hover,
.toc:hover,
.insights-section:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-hover);
}

.project-card {
  cursor: pointer;
}

.project-header,
.event-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.event-header {
  justify-content: space-between;
}

.project-icon {
  font-size: 28px;
  line-height: 1;
}

.project-card h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
  border: none;
  padding: 0;
}

.project-card p,
.card p,
.event-description {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  padding: 3px 8px;
  font-weight: 500;
}

.project-meta,
.sdk-badges {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.sdk-badges {
  margin-top: var(--spacing-lg);
}

/* Badge variants */
.badge-version {
  background: var(--color-surface-hover);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.badge-status,
.badge-ga {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}

.badge-static,
.badge-bytebrew {
  background: var(--color-info-bg);
  color: var(--color-info-text);
}

.badge-firebase {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
}

/* ============================================
   LISTS
   ============================================ */
.features,
.insights-list {
  list-style: none;
  margin-bottom: 20px;
  padding-left: 0;
}

.features li,
.insights-list li {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 6px 0;
  padding-left: var(--spacing-lg);
  position: relative;
}

.features li:before,
.insights-list li:before {
  content: '\2022';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* ============================================
   BUTTONS & LINKS
   ============================================ */
.project-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.project-card a,
.btn {
  display: inline-block;
  font-size: 13px;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  transition: var(--transition-fast);
}

.project-card a:hover,
.btn:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.project-card a.secondary,
.btn-secondary {
  font-weight: 400;
  color: var(--color-text-secondary);
}

.project-card a.secondary:hover,
.btn-secondary:hover {
  background: var(--color-text-secondary);
  color: white;
  border-color: var(--color-text-secondary);
}

/* Quick Links */
.quick-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.quick-link {
  font-size: 13px;
  color: var(--color-accent);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  transition: var(--transition-fast);
}

.quick-link:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* TOC Links */
.toc ul {
  list-style: none;
  padding-left: 0;
}

.toc li {
  padding: 6px 0;
}

.toc a {
  color: var(--color-accent);
  text-decoration: none;
  font-size: 14px;
}

.toc a:hover {
  text-decoration: underline;
}

/* Back Link */
.back-link {
  margin-left: auto;
  font-size: 13px;
  color: var(--color-accent);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  transition: var(--transition-fast);
}

.back-link:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* Logo as link */
.logo-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
  color: inherit;
}

/* ============================================
   GRID
   ============================================ */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

/* ============================================
   CODE & TECHNICAL
   ============================================ */
code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-surface-hover);
  padding: 2px 6px;
}

.code-block {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  line-height: 1.5;
}

.code-comment {
  color: var(--color-text-secondary);
}

.event-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-surface-hover);
  padding: var(--spacing-xs) var(--spacing-sm);
}

.event-type {
  font-size: 12px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-weight: 500;
  background: var(--color-surface-hover);
  color: var(--color-text-secondary);
}

.event-params {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.param {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-surface-hover);
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* ============================================
   NOTES & CALLOUTS
   ============================================ */
.implementation-note {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.implementation-note h4 {
  margin-bottom: var(--spacing-sm);
}

.implementation-note p {
  margin-bottom: 0;
}

/* ============================================
   TABLES
   ============================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: 14px;
  background: var(--color-surface);
}

th {
  background: var(--color-surface-hover);
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

td {
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

/* ============================================
   FOOTER
   ============================================ */
.app-footer {
  padding: var(--header-padding);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-content p,
.app-footer p {
  font-size: 12px;
  color: var(--color-text-muted);
}

.footer-content .update-date {
  font-size: 11px;
  color: var(--color-text-light);
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: #f0f0f0;
}

::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #aaa;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-padding: 12px 16px;
    --content-padding: 24px 16px;
  }

  .logo h1 {
    font-size: 16px;
  }

  .page-title {
    font-size: 20px;
  }

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

  .quick-links {
    flex-direction: column;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}