/* ==========================================================================
   GoogleApp News & AI Update - Authentic Google News Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Google+Sans:wght@400;500;700&family=Roboto:wght@300;400;500;700&family=Google+Sans+Text:wght@400;500;700&display=swap');

:root {
  /* Google Dark Theme (Default) */
  --google-bg: #202124;
  --google-surface: #292a2d;
  --google-card: #202124;
  --google-card-border: #3c4043;
  --google-card-hover: #303134;
  
  --google-text-primary: #e8eaed;
  --google-text-secondary: #9aa0a6;
  --google-text-muted: #80868b;
  
  --google-blue: #8ab4f8;
  --google-blue-active: #1a73e8;
  --google-red: #ea4335;
  --google-yellow: #fbbc04;
  --google-green: #34a853;
  
  --google-search-bg: #303134;
  --google-search-border: #5f6368;
  
  --font-google: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-text: 'Google Sans Text', 'Roboto', sans-serif;
  --font-roboto: 'Roboto', sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --google-bg: #ffffff;
  --google-surface: #f8f9fa;
  --google-card: #ffffff;
  --google-card-border: #dadce0;
  --google-card-hover: #f1f3f4;
  
  --google-text-primary: #202124;
  --google-text-secondary: #5f6368;
  --google-text-muted: #70757a;
  
  --google-blue: #1a73e8;
  --google-search-bg: #f1f3f4;
  --google-search-border: #dfe1e5;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

.google-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Google News Top Bar
   ========================================================================== */
.gn-topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--google-bg);
  border-bottom: 1px solid var(--google-card-border);
  padding: 0.5rem 1.5rem;
}

.gn-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.gn-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--google-text-primary);
  white-space: nowrap;
}

.google-colored-logo {
  font-family: var(--font-google);
  font-weight: 700;
  letter-spacing: -0.5px;
}

.g-blue { color: #4285f4; }
.g-red { color: #ea4335; }
.g-yellow { color: #fbbc05; }
.g-green { color: #34a853; }

.gn-tag-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(138, 180, 248, 0.15);
  color: var(--google-blue);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-left: 4px;
}

/* Center Search Bar */
.gn-search-box {
  flex: 1;
  max-width: 720px;
  position: relative;
}

.gn-search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 3rem;
  background: var(--google-search-bg);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--google-text-primary);
  font-size: 0.95rem;
  font-family: var(--font-google);
  outline: none;
  transition: var(--transition);
}

.gn-search-input:focus {
  background: var(--google-bg);
  border-color: var(--google-blue);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.gn-search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--google-text-secondary);
  pointer-events: none;
}

/* Topbar Right Controls */
.gn-top-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.gn-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--google-text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
}

.gn-icon-btn:hover {
  background: var(--google-card-hover);
  color: var(--google-text-primary);
}

.gn-sync-btn {
  background: rgba(138, 180, 248, 0.15);
  border: 1px solid rgba(138, 180, 248, 0.3);
  color: var(--google-blue);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: var(--transition);
}

.gn-sync-btn:hover {
  background: rgba(138, 180, 248, 0.25);
}

.gn-sync-btn.active-spin svg, .gn-sync-btn.active-spin span:first-child {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  100% { transform: rotate(360deg); }
}

.gn-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #1a73e8;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

/* ==========================================================================
   Google News Navigation Bar (Tabs)
   ========================================================================== */
.gn-nav-tabs {
  background: var(--google-bg);
  border-bottom: 1px solid var(--google-card-border);
  padding: 0 1.5rem;
  overflow-x: auto;
  white-space: nowrap;
}

.gn-nav-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.gn-tab-item {
  padding: 0.85rem 0.2rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--google-text-secondary);
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.gn-tab-item:hover {
  color: var(--google-text-primary);
}

.gn-tab-item.active {
  color: var(--google-blue);
  border-bottom-color: var(--google-blue);
}

/* ==========================================================================
   "Your briefing" Header & Weather Card
   ========================================================================== */
.gn-briefing-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin: 2rem 0 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.gn-briefing-title {
  font-size: 2rem;
  font-weight: 500;
  color: var(--google-text-primary);
}

.gn-briefing-date {
  font-size: 0.9rem;
  color: var(--google-text-secondary);
  margin-top: 0.2rem;
}

.gn-weather-card {
  background: var(--google-surface);
  border: 1px solid var(--google-card-border);
  border-radius: var(--radius-md);
  padding: 0.6rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.85rem;
}

.weather-temp {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--google-text-primary);
}

/* ==========================================================================
   Google News Multi-Column Layout (Top Stories + Picks for you)
   ========================================================================== */
.gn-main-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.gn-card-panel {
  background: var(--google-surface);
  border: 1px solid var(--google-card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.gn-section-heading {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--google-blue);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* Lead Top Story Grid */
.gn-top-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.gn-hero-story {
  display: flex;
  flex-direction: column;
}

.gn-hero-img-wrap {
  width: 100%;
  height: 200px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 0.85rem;
  background: #111;
}

.gn-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gn-source-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--google-text-secondary);
  margin-bottom: 0.4rem;
}

.gn-source-icon {
  width: 16px;
  height: 16px;
  border-radius: 2px;
}

.gn-story-title {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--google-text-primary);
  margin-bottom: 0.5rem;
}

.gn-story-title:hover {
  text-decoration: underline;
}

.gn-story-time {
  font-size: 0.75rem;
  color: var(--google-text-muted);
}

/* Sub stories list */
.gn-sub-stories-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.gn-sub-story-item {
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--google-card-border);
}

.gn-sub-story-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Picks For You List */
.gn-picks-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.gn-pick-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--google-card-border);
}

.gn-pick-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.gn-pick-content {
  flex: 1;
}

.gn-pick-thumb {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

/* ==========================================================================
   Google Topic Sections (AI, Stock, Tech Cards)
   ========================================================================== */
.gn-topic-section {
  margin-bottom: 3rem;
}

.gn-topic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--google-card-border);
  padding-bottom: 0.5rem;
}

.gn-topic-title {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--google-text-primary);
}

.gn-news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.gn-news-card {
  background: var(--google-surface);
  border: 1px solid var(--google-card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  cursor: pointer;
}

.gn-news-card:hover {
  background: var(--google-card-hover);
  border-color: var(--google-blue);
}

.gn-card-media {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 0.85rem;
}

.gn-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gn-card-desc {
  font-size: 0.85rem;
  color: var(--google-text-secondary);
  line-height: 1.5;
  margin-bottom: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.gn-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--google-card-border);
  font-size: 0.75rem;
  color: var(--google-text-muted);
}

/* ==========================================================================
   Article Detail Page (Clean Google Reader Style)
   ========================================================================== */
.gn-article-container {
  max-width: 820px;
  margin: 2rem auto 5rem;
  padding: 0 1.5rem;
}

.gn-article-card {
  background: var(--google-surface);
  border: 1px solid var(--google-card-border);
  border-radius: var(--radius-md);
  padding: 2.5rem;
}

.gn-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--google-blue);
  margin-bottom: 1.5rem;
}

.gn-back-link:hover {
  text-decoration: underline;
}

.gn-article-headline {
  font-size: 2.2rem;
  font-weight: 500;
  line-height: 1.25;
  color: var(--google-text-primary);
  margin-bottom: 1.25rem;
}

.gn-article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--google-card-border);
  border-bottom: 1px solid var(--google-card-border);
  font-size: 0.85rem;
  color: var(--google-text-secondary);
  margin-bottom: 1.5rem;
}

.gn-article-media {
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 2rem;
}

.gn-article-media img {
  width: 100%;
  max-height: 440px;
  object-fit: cover;
}

.gn-audio-box {
  background: var(--google-bg);
  border: 1px solid var(--google-card-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.gn-listen-btn {
  background: var(--google-blue);
  color: #202124;
  font-weight: 700;
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-google);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.gn-article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--google-text-primary);
}

.gn-article-body h2 {
  font-size: 1.4rem;
  font-weight: 500;
  margin: 2rem 0 0.85rem;
  color: var(--google-text-primary);
}

.gn-article-body p {
  margin-bottom: 1.4rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.gn-footer {
  border-top: 1px solid var(--google-card-border);
  background: var(--google-bg);
  padding: 2.5rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--google-text-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .gn-main-layout { grid-template-columns: 1fr; }
  .gn-top-story-grid { grid-template-columns: 1fr; }
  .gn-search-box { max-width: 100%; }
}