/* ============================================
   TYUE.COM - Main Application Styles
   ============================================ */

/* --- Hero Section --- */
.hero {
  padding: var(--space-24) 0 var(--space-20);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(83,58,253,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(83,58,253,0.06);
  border: 1px solid var(--color-border-soft-purple);
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 400;
  color: var(--color-purple);
  margin-bottom: var(--space-6);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--color-purple);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 300;
  letter-spacing: -1.4px;
  line-height: 1.03;
  color: var(--color-heading);
  margin-bottom: var(--space-5);
  max-width: 720px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-body);
  line-height: 1.55;
  max-width: 540px;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-10);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: 300;
  color: var(--color-heading);
  letter-spacing: -0.64px;
  line-height: 1;
  margin-bottom: 4px;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--color-body);
}

/* --- Trending Section --- */
.trending-strip {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  overflow: hidden;
}

.trending-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.trending-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-purple);
  white-space: nowrap;
}

.trending-items {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
  flex-wrap: nowrap;
}

.trending-items::-webkit-scrollbar { display: none; }

.trending-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  font-size: 12px;
  color: var(--color-label);
  white-space: nowrap;
  transition: all var(--transition);
}

.trending-item:hover {
  border-color: var(--color-purple-light);
  color: var(--color-purple);
}

/* --- News Card --- */
.news-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-slow);
}

.news-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-soft-purple);
  transform: translateY(-3px);
}

.news-card-image {
  height: 180px;
  background: linear-gradient(135deg, var(--color-brand-dark), var(--color-purple));
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-card-image .icon-bg {
  font-size: 48px;
  opacity: 0.3;
}

.news-card-body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.news-card-category {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-purple);
}

.news-card-date {
  font-size: 12px;
  color: var(--color-body);
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--color-heading);
  line-height: 1.35;
  margin-bottom: var(--space-2);
  letter-spacing: -0.2px;
}

.news-card-excerpt {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
  flex: 1;
}

.news-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.news-card-author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  color: var(--color-body);
}

.news-card-read-time {
  font-size: 12px;
  color: var(--color-body);
}

/* --- Featured Article --- */
.featured-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
}

.featured-article:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.featured-article-image {
  min-height: 320px;
  background: linear-gradient(135deg, #1c1e54 0%, #533afd 50%, #f96bee 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.featured-article-body {
  padding: var(--space-10) var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-article h2 {
  font-size: 1.75rem;
  margin-bottom: var(--space-4);
  letter-spacing: -0.4px;
}

/* --- Tutorial Card --- */
.tutorial-card {
  position: relative;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: all var(--transition-slow);
  overflow: hidden;
}

.tutorial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-magenta));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.tutorial-card:hover::before {
  transform: scaleX(1);
}

.tutorial-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.tutorial-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--space-4);
  background: var(--color-bg-soft);
}

.tutorial-card h3 {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-heading);
  margin-bottom: var(--space-2);
}

.tutorial-card p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-body);
  margin-bottom: var(--space-4);
}

.tutorial-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 12px;
  color: var(--color-body);
}

/* --- Model Comparison Table --- */
.model-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.model-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.model-table th {
  padding: 14px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-label);
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.model-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-body);
  vertical-align: middle;
}

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

.model-table tr:hover td {
  background: rgba(83,58,253,0.02);
}

.model-name {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.model-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.model-score {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 400;
  color: var(--color-heading);
  font-variant-numeric: tabular-nums;
}

.score-bar {
  display: inline-block;
  width: 60px;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  vertical-align: middle;
}

.score-fill {
  display: block;
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-purple), var(--color-magenta));
}

/* --- Forum --- */
.forum-header {
  padding: var(--space-16) 0 var(--space-10);
  background: linear-gradient(180deg, rgba(83,58,253,0.04) 0%, transparent 100%);
  border-bottom: 1px solid var(--color-border);
}

.forum-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.forum-category-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  cursor: pointer;
}

.forum-category-card:hover {
  border-color: var(--color-purple-light);
  box-shadow: var(--shadow-sm);
}

.forum-category-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.forum-category-name {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-heading);
  line-height: 1.2;
}

.forum-category-count {
  font-size: 12px;
  color: var(--color-body);
}

.forum-post {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.forum-post:hover {
  background: rgba(83,58,253,0.01);
  margin: 0 calc(-1 * var(--container-padding));
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

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

.forum-post-title {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-heading);
  margin-bottom: 4px;
  line-height: 1.35;
  letter-spacing: -0.1px;
}

.forum-post-title:hover {
  color: var(--color-purple);
}

.forum-post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 12px;
  color: var(--color-body);
}

.forum-post-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  white-space: nowrap;
  font-size: 12px;
  color: var(--color-body);
}

/* --- Sidebar --- */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.sidebar-widget {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.sidebar-widget h4 {
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-label);
  margin-bottom: var(--space-4);
}

/* --- Newsletter --- */
.newsletter-section {
  background: var(--color-brand-dark);
  padding: var(--space-16) 0;
}

.newsletter-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-10);
}

.newsletter-form {
  display: flex;
  gap: var(--space-2);
  max-width: 400px;
  width: 100%;
}

.newsletter-form .form-input {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
  color: white;
}

.newsletter-form .form-input::placeholder {
  color: rgba(255,255,255,0.4);
}

.newsletter-form .form-input:focus {
  border-color: rgba(255,255,255,0.5);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.1);
}

/* --- Mobile Menu Toggle --- */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--color-heading);
  font-size: 20px;
}

@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  .hero h1 { font-size: 2.25rem; }
  .hero-stats { flex-direction: column; gap: var(--space-4); }
  .featured-article { grid-template-columns: 1fr; }
  .featured-article-image { min-height: 200px; }
  .forum-categories { grid-template-columns: repeat(2, 1fr); }
  .newsletter-inner { flex-direction: column; }
  .newsletter-form { max-width: 100%; }
}

/* --- Scroll to Top --- */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--color-purple);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all var(--transition);
  z-index: 99;
}

.scroll-top.visible { opacity: 1; }
.scroll-top:hover { background: var(--color-purple-hover); transform: translateY(-2px); }

/* --- Loading Skeleton --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-border) 25%, var(--color-bg-soft) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-heading);
  color: white;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  box-shadow: var(--shadow-xl);
  z-index: 200;
  transition: transform 0.3s ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* --- Active nav indicator --- */
.nav-links a.active {
  color: var(--color-purple);
  background: rgba(83,58,253,0.06);
}