/**
 * Literature Club Forum - Main Stylesheet
 * A modern, minimalistic design for book lovers
 */

/* ===== CSS Variables ===== */
:root {
  /* Colors - Warm literary palette */
  --color-primary: #8B4513;
  --color-primary-light: #A0522D;
  --color-primary-dark: #654321;
  --color-secondary: #D4A574;
  --color-accent: #C19A6B;
  
  /* Neutrals */
  --color-bg: #FAF8F5;
  --color-bg-alt: #F5F2ED;
  --color-surface: #FFFFFF;
  --color-border: #E8E2DA;
  --color-border-light: #F0EBE3;
  
  /* Text */
  --color-text: #2C2416;
  --color-text-secondary: #6B5B4F;
  --color-text-muted: #9B8B7A;
  --color-text-inverse: #FFFFFF;
  
  /* Status colors */
  --color-success: #4A7C59;
  --color-warning: #C9A227;
  --color-danger: #A94442;
  --color-info: #5B7B8C;
  
  /* Typography */
  --font-serif: 'Merriweather', 'Georgia', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(44, 36, 22, 0.05);
  --shadow-md: 0 4px 6px rgba(44, 36, 22, 0.07);
  --shadow-lg: 0 10px 20px rgba(44, 36, 22, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  
  /* Layout */
  --container-max: 1200px;
  --header-height: 64px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
}

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.main-content {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

/* ===== Header ===== */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo:hover {
  color: var(--color-primary-dark);
}

.logo-icon {
  font-size: 1.75rem;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--color-surface);
}

.user-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text);
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.dropdown-divider {
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-sm) 0;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  color: var(--color-secondary);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255,255,255,0.1);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-text-inverse);
}

.btn-secondary {
  background: var(--color-secondary);
  color: var(--color-text);
}

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.btn-success {
  background: var(--color-success);
  color: var(--color-text-inverse);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.0625rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-hint {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

.form-error {
  color: var(--color-danger);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* ===== Cards ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0;
}

/* ===== Home Page ===== */
.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-surface) 100%);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

.hero-search {
  max-width: 500px;
  margin: 0 auto;
}

.search-wrapper {
  position: relative;
}

.search-wrapper input {
  padding-right: 3rem;
}

.search-btn {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  padding: 0 var(--spacing-md);
  background: var(--color-primary);
  border: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-inverse);
  cursor: pointer;
}

/* Stats bar */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-serif);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Trending Section */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
}

.trending-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.trending-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.trending-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-secondary);
}

.trending-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
}

.trending-rank {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-border);
  font-family: var(--font-serif);
}

.trending-category {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.trending-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.trending-title a {
  color: var(--color-text);
}

.trending-title a:hover {
  color: var(--color-primary);
}

.trending-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.trending-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.trending-stats {
  display: flex;
  gap: var(--spacing-md);
  margin-left: auto;
}

/* Categories Grid */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  transition: all var(--transition-fast);
}

.category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.category-icon {
  font-size: 2rem;
  line-height: 1;
}

.category-info {
  flex: 1;
}

.category-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.category-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.category-stats {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ===== Forum Pages ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb-separator {
  color: var(--color-border);
}

/* Thread List */
.thread-list {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.thread-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-fast);
}

.thread-item:last-child {
  border-bottom: none;
}

.thread-item:hover {
  background: var(--color-bg-alt);
}

.thread-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--spacing-md);
  font-size: 1.25rem;
}

.thread-icon.pinned {
  background: var(--color-secondary);
}

.thread-icon.locked {
  background: var(--color-text-muted);
  color: var(--color-surface);
}

.thread-content {
  flex: 1;
  min-width: 0;
}

.thread-title-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.thread-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.thread-title:hover {
  color: var(--color-primary);
}

.thread-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.badge-pinned {
  background: var(--color-secondary);
  color: var(--color-text);
}

.badge-locked {
  background: var(--color-text-muted);
  color: var(--color-surface);
}

.badge-hot {
  background: var(--color-danger);
  color: var(--color-surface);
}

.thread-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.thread-tags {
  display: flex;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xs);
}

.tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.thread-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-xs);
  margin-left: var(--spacing-lg);
}

.stat-box {
  text-align: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  min-width: 60px;
}

.stat-box-value {
  font-weight: 600;
  color: var(--color-text);
}

.stat-box-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.thread-last-post {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* Thread View */
.thread-header {
  margin-bottom: var(--spacing-xl);
}

.thread-header h1 {
  margin-bottom: var(--spacing-md);
}

.thread-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

/* Posts */
.post-list {
  margin-bottom: var(--spacing-xl);
}

.post-item {
  display: flex;
  gap: var(--spacing-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.post-sidebar {
  width: 150px;
  text-align: center;
  flex-shrink: 0;
}

.post-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--spacing-sm);
  background: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-surface);
}

.post-author {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.post-role {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: var(--spacing-xs);
}

.role-admin {
  background: var(--color-danger);
  color: var(--color-surface);
}

.role-moderator {
  background: var(--color-info);
  color: var(--color-surface);
}

.role-member {
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
}

.post-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.post-main {
  flex: 1;
  min-width: 0;
}

.post-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border-light);
}

.post-date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.post-number {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.post-body {
  line-height: 1.7;
}

.post-body p {
  margin-bottom: var(--spacing-md);
}

.post-body blockquote {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-secondary);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.post-body code {
  font-family: var(--font-mono);
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

.post-body pre {
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

.post-body pre code {
  background: none;
  padding: 0;
}

.post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
}

.post-reactions {
  display: flex;
  gap: var(--spacing-sm);
}

.reaction-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.reaction-btn:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

.reaction-btn.active {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}

.post-actions-menu {
  display: flex;
  gap: var(--spacing-sm);
}

/* Reply Form */
.reply-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.reply-form h3 {
  margin-bottom: var(--spacing-md);
}

/* ===== User Pages ===== */
.profile-header {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-surface);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.profile-avatar {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 600;
  color: var(--color-primary);
  border: 4px solid rgba(255,255,255,0.3);
}

.profile-info h1 {
  color: var(--color-surface);
  margin-bottom: var(--spacing-xs);
}

.profile-role {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.profile-bio {
  opacity: 0.9;
  max-width: 600px;
}

.profile-stats {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.profile-stat {
  text-align: center;
}

.profile-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.profile-stat-label {
  font-size: 0.75rem;
  opacity: 0.8;
  text-transform: uppercase;
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.tab {
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-secondary);
  font-weight: 500;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition-fast);
}

.tab:hover,
.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ===== Admin Pages ===== */
.admin-page {
  background: var(--color-bg-alt);
  min-height: calc(100vh - var(--header-height));
  padding: var(--spacing-xl) 0;
}

.admin-header {
  margin-bottom: var(--spacing-lg);
}

.admin-nav {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  background: var(--color-surface);
  padding: var(--spacing-sm);
  border-radius: var(--radius-lg);
}

.admin-nav-item {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.admin-nav-item:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.admin-nav-item.active {
  background: var(--color-primary);
  color: var(--color-surface);
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.admin-stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.admin-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.admin-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
}

.admin-stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.admin-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.admin-table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.admin-table tr:hover {
  background: var(--color-bg-alt);
}

/* ===== Auth Pages ===== */
.auth-page {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  background: var(--color-bg-alt);
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-header h1 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

.auth-header p {
  color: var(--color-text-muted);
}

.auth-footer {
  text-align: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* ===== Alerts & Messages ===== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.alert-success {
  background: rgba(74, 124, 89, 0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.alert-danger {
  background: rgba(169, 68, 66, 0.1);
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
}

.alert-warning {
  background: rgba(201, 162, 39, 0.1);
  border: 1px solid var(--color-warning);
  color: var(--color-warning);
}

.alert-info {
  background: rgba(91, 123, 140, 0.1);
  border: 1px solid var(--color-info);
  color: var(--color-info);
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-xl);
}

.page-link {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.page-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-surface);
}

.page-link.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-surface);
}

.page-link.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-danger);
  color: var(--color-surface);
}

/* ===== Empty States ===== */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  display: block;
}

/* ===== Loading States ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

.hidden { display: none; }
.visible { display: block; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  .hero-title { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  
  .trending-grid {
    grid-template-columns: 1fr;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-bar {
    flex-wrap: wrap;
    gap: var(--spacing-md);
  }
  
  .post-item {
    flex-direction: column;
  }
  
  .post-sidebar {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-align: left;
  }
  
  .post-avatar {
    width: 48px;
    height: 48px;
    margin: 0;
    font-size: 1.25rem;
  }
  
  .profile-header {
    flex-direction: column;
    text-align: center;
  }
  
  .nav-main {
    display: none;
  }
  
  .admin-nav {
    flex-wrap: wrap;
  }
  
  .auth-card {
    padding: var(--spacing-lg);
  }
}

/* ===== Print Styles ===== */
@media print {
  .site-header,
  .site-footer,
  .admin-nav,
  .post-actions-menu,
  .reply-form {
    display: none;
  }
  
  .post-item {
    break-inside: avoid;
  }
}