/* ===== FEED AI — PAGE-SPECIFIC STYLES ===== */
/* Extends styles.css — loads after it in the cascade */

/* ===== TOKEN EXTENSIONS ===== */
:root {
  /* Modular typography scale (feed-ai uses tighter ratio) */
  --text-xs: 0.64rem;
  --text-sm: 0.8rem;
  --text-lg: 1.25rem;
  --text-xl: 1.563rem;
  --text-2xl: 1.953rem;
  --text-3xl: 2.441rem;
  --text-4xl: 3.052rem;

  /* text-tertiary: WCAG AA fix (≥4.5:1 on #fafbfc) */
  --text-tertiary: #5a6474;

  /* Category accent colors */
  --cat-verona: #8b4513;
  --cat-italia: #2e8b57;
  --cat-europa: #4169e1;
  --cat-mondo: #6b46c1;
  --cat-guerre: #dc143c;
  --cat-sport: #ff4500;
  --cat-cultura: #9370db;
  --cat-tech: #00ced1;
  --cat-finanza: #daa520;
}

/* ===== ANIMATIONS ===== */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulseRing {
  0% { box-shadow: 0 0 0 0 rgba(193, 165, 123, 0.4); }
  70% { box-shadow: 0 0 0 16px rgba(193, 165, 123, 0); }
  100% { box-shadow: 0 0 0 0 rgba(193, 165, 123, 0); }
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(250, 251, 252, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226, 213, 197, 0.3);
  padding: var(--space-4) var(--space-6);
  transition:
    background-color var(--duration-slow) var(--ease-elegant),
    border-color var(--duration-slow) var(--ease-elegant);
}

[data-theme='dark'] .header {
  background: rgba(15, 20, 25, 0.85);
  border-bottom: 1px solid rgba(58, 63, 74, 0.5);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: white;
  box-shadow: var(--shadow-md);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-main {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-sub {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 300;
  letter-spacing: 3px;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-time {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.5px;
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background-color var(--duration-fast) var(--ease-elegant),
    color var(--duration-fast) var(--ease-elegant),
    transform var(--duration-fast) var(--ease-elegant);
}

.icon-btn:hover {
  background: var(--accent-primary);
  color: white;
  transform: scale(1.1);
}

.icon-btn.refresh:hover {
  transform: rotate(180deg) scale(1.1);
}

.icon-btn:active {
  animation: pulseRing 600ms var(--ease-elegant);
}

/* ===== MAIN CONTENT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
}

.intro {
  text-align: center;
  margin-bottom: var(--space-10);
  animation: fadeInUp 600ms var(--ease-elegant);
}

.intro h1 {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.intro p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== CATEGORY CARDS ===== */
.categories {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.category-card {
  background: var(--bg-secondary);
  border: 1px solid var(--divider);
  border-radius: 12px;
  overflow: hidden;
  transition: box-shadow var(--duration-medium) var(--ease-elegant);
  animation: fadeInUp 600ms var(--ease-elegant) backwards;
}

.category-card:nth-child(1) { animation-delay: 0ms; }
.category-card:nth-child(2) { animation-delay: 100ms; }
.category-card:nth-child(3) { animation-delay: 200ms; }
.category-card:nth-child(4) { animation-delay: 300ms; }
.category-card:nth-child(5) { animation-delay: 400ms; }
.category-card:nth-child(6) { animation-delay: 500ms; }
.category-card:nth-child(7) { animation-delay: 600ms; }

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

/* Category Header */
.category-header {
  padding: var(--space-5) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--divider);
  transition: background-color var(--duration-fast) var(--ease-elegant);
}

.category-header:hover {
  background: var(--bg-tertiary);
}

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

.category-icon {
  font-size: var(--text-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.category-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.category-count {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  font-weight: 500;
  background: var(--bg-tertiary);
  padding: 4px 12px;
  border-radius: 12px;
}

.category-toggle {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  transition: transform var(--duration-medium) var(--ease-elegant);
}

.category-card.expanded .category-toggle {
  transform: rotate(180deg);
}

/* Category Content */
.category-content {
  max-height: 0;
  overflow: hidden;
  transition:
    max-height var(--duration-slow) var(--ease-elegant),
    opacity var(--duration-slow) var(--ease-elegant);
  opacity: 0;
}

.category-card.expanded .category-content {
  max-height: none;
  opacity: 1;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
  padding: var(--space-6);
}

/* News Item */
.news-item {
  background: var(--bg-primary);
  border: 1px solid var(--divider);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition:
    transform var(--duration-medium) var(--ease-elegant),
    box-shadow var(--duration-medium) var(--ease-elegant),
    border-color var(--duration-medium) var(--ease-elegant);
  text-decoration: none;
  color: inherit;
  display: block;
}

.news-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.news-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--bg-tertiary), var(--divider));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  overflow: hidden;
  position: relative;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.news-content {
  padding: var(--space-4);
}

.news-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: var(--space-2);
}

.news-description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

.news-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-weight: 500;
}

.news-source {
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-time {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Load More Button */
.load-more-wrapper {
  padding: var(--space-5) var(--space-6);
  text-align: center;
  border-top: 1px solid var(--divider);
}

.btn-load-more {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border: none;
  padding: var(--space-3) var(--space-6);
  border-radius: 24px;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition:
    transform var(--duration-medium) var(--ease-elegant),
    box-shadow var(--duration-medium) var(--ease-elegant);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
}

.btn-load-more:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.btn-load-more:active {
  animation: pulseRing 600ms var(--ease-elegant);
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  border-top: 1px solid var(--divider);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .header-content {
    flex-direction: row;
    gap: var(--space-3);
    flex-wrap: wrap;
  }

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

  .logo-text {
    align-items: flex-start;
  }

  .intro h1 {
    font-size: var(--text-2xl);
  }

  .header-time {
    display: none;
  }
}

/* ===== UTILITY ===== */
.hidden {
  display: none !important;
}

.icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}