@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

/* Color Themes & System Variables */
:root {
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Light Mode Palette */
  --bg-primary: #f4f6f9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecef;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --accent-color: #0056cc;
  --accent-light: rgba(0, 86, 204, 0.1);
  --border-color: #e2e8f0;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --pill-bg: #e2f0fd;
  --pill-text: #0056cc;
}

[data-theme="dark"] {
  /* Dark Mode Palette (Premium Deep Slate & Blue) */
  --bg-primary: #0b0f19;
  --bg-secondary: #151c2c;
  --bg-tertiary: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #3b82f6;
  --accent-light: rgba(59, 130, 246, 0.15);
  --border-color: #26334d;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.3);
  --pill-bg: #1e293b;
  --pill-text: #60a5fa;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.5;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

/* Mobile Frame Container (Simulating a premium mobile app on desktop, full screen on mobile) */
.app-container {
  width: 100%;
  max-width: 480px;
  min-height: 100vh;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Header Styles */
header {
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  z-index: 100;
  border-bottom: 1px solid var(--border-color);
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: linear-gradient(135deg, var(--accent-color) 0%, #003b99 100%);
  color: #ffffff;
}

.header-main h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  display: inline-block;
}

/* Dark Mode Icon Button */
.theme-toggle-btn {
  background: none;
  border: none;
  color: #ffffff;
  font-size: 20px;
  cursor: pointer;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.theme-toggle-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Sub-header Information Ticker */
.info-ticker {
  background-color: var(--accent-color);
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  padding: 8px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 500;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background-color: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(52, 211, 153, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0);
  }
}

/* News List Scroll Container */
.news-feed {
  flex: 1;
  overflow-y: auto;
  padding: 16px 16px 90px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

/* Custom Scrollbar */
.news-feed::-webkit-scrollbar {
  width: 4px;
}
.news-feed::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 2px;
}

/* News Card Layout (Inspired by BharatBrief) */
.news-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  gap: 14px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
  overflow: hidden;
}

.news-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-color);
}

/* News Card Elements */
.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
}

.source-pill {
  background-color: var(--pill-bg);
  color: var(--pill-text);
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: -0.2px;
}

.card-image-container {
  width: 90px;
  height: 90px;
  flex-shrink: 0;
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

.card-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.news-card:hover .card-image-container img {
  transform: scale(1.05);
}

/* Brief Content / Expandable Detail View */
.brief-container {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.6;
  animation: fadeIn 0.3s ease-out;
}

.news-card.expanded {
  flex-direction: column;
}

.news-card.expanded .brief-container {
  display: block;
}

.news-card.expanded .card-title {
  -webkit-line-clamp: unset;
}

.news-card.expanded .card-image-container {
  width: 100%;
  height: 180px;
  margin-top: 10px;
  order: 2;
}

.card-action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  font-size: 13px;
}

.read-more-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  text-decoration: underline;
}

/* Floating Action Button (FAB) for manual refresh */
.fab-refresh {
  position: absolute;
  bottom: 80px;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--accent-color);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  transition: transform 0.2s, background-color 0.2s;
}

.fab-refresh:hover {
  transform: scale(1.05);
  background-color: #0047b3;
}

.fab-refresh svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
  transition: transform 0.4s ease;
}

.fab-refresh.spinning svg {
  transform: rotate(360deg);
}

/* Bottom Navigation Bar Styles */
.bottom-nav {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  flex: 1;
  height: 100%;
  gap: 4px;
  transition: color 0.2s, transform 0.1s;
}

.nav-item:active {
  transform: scale(0.95);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke-width 0.2s;
}

.nav-item.active {
  color: var(--accent-color);
  font-weight: 700;
}

.nav-item.active svg {
  stroke-width: 2.5;
}

/* Sub-views (Settings/Menu overlays) */
.sub-view-overlay {
  position: absolute;
  top: 96px; /* below header */
  bottom: 64px; /* above bottom nav */
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  z-index: 98;
  display: none;
  flex-direction: column;
  padding: 20px;
  overflow-y: auto;
  animation: slideUp 0.3s ease-out;
}

.sub-view-overlay.active {
  display: flex;
}

.overlay-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.menu-group {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 8px 16px;
  margin-bottom: 20px;
}

.menu-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-color);
}

.menu-row:last-child {
  border-bottom: none;
}

.menu-row span {
  font-weight: 500;
}

.menu-select {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

.about-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Error/Empty Feed Messages */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  gap: 12px;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  stroke: var(--text-secondary);
  stroke-width: 1.5;
}

/* Add Card Styles for Advertising / Custom sections */
.ad-card {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #ffffff;
  border-radius: 16px;
  padding: 16px;
  position: relative;
  overflow: hidden;
  border: 1px solid #334155;
}

.ad-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background-color: rgba(255, 255, 255, 0.2);
  padding: 2px 6px;
  font-size: 10px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}

.ad-title {
  font-size: 14px;
  font-weight: 400;
  color: #94a3b8;
  margin-bottom: 4px;
}

.ad-headline {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.ad-button {
  background-color: var(--accent-color);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.ad-button:hover {
  background-color: #3b82f6;
}