/* ============================================
   ajithps.in — Personal News Dashboard
   Premium Dark Mode Design System
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Base colors */
  --bg-primary: #060a14;
  --bg-secondary: #0c1222;
  --bg-card: rgba(15, 23, 42, 0.65);
  --bg-card-hover: rgba(20, 30, 55, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-input: rgba(255, 255, 255, 0.06);

  /* Accent gradients */
  --accent-1: #06b6d4;   /* cyan */
  --accent-2: #8b5cf6;   /* purple */
  --accent-3: #f59e0b;   /* amber */
  --accent-4: #10b981;   /* emerald */
  --accent-5: #ef4444;   /* red */
  --gradient-primary: linear-gradient(135deg, #06b6d4, #8b5cf6);
  --gradient-world: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-india: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-invest: linear-gradient(135deg, #10b981, #06b6d4);
  --gradient-medical: linear-gradient(135deg, #8b5cf6, #ec4899);

  /* Text colors */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #06b6d4;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.1);

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, 0.15);
  --shadow-glow-purple: 0 0 30px rgba(139, 92, 246, 0.15);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 600px 400px at 20% 20%, rgba(6, 182, 212, 0.06), transparent),
    radial-gradient(ellipse 500px 500px at 80% 80%, rgba(139, 92, 246, 0.06), transparent),
    radial-gradient(ellipse 400px 300px at 50% 50%, rgba(16, 185, 129, 0.03), transparent);
  pointer-events: none;
  z-index: 0;
}

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

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ============================================
   PASSWORD GATE
   ============================================ */
#password-gate {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

#password-gate.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#password-gate::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 600px at 30% 40%, rgba(6, 182, 212, 0.08), transparent),
    radial-gradient(ellipse 600px 600px at 70% 60%, rgba(139, 92, 246, 0.08), transparent);
  animation: gate-bg-pulse 8s ease-in-out infinite alternate;
}

@keyframes gate-bg-pulse {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

.gate-container {
  position: relative;
  z-index: 1;
  text-align: center;
  animation: gate-fade-in 0.6s ease-out;
}

@keyframes gate-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.gate-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-lg);
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  box-shadow: var(--shadow-glow-cyan);
}

.gate-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gate-subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-xl);
}

.gate-input-wrapper {
  position: relative;
  width: 320px;
  margin: 0 auto;
}

.gate-input-wrapper::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-md) + 2px);
  background: var(--gradient-primary);
  opacity: 0.4;
  transition: opacity var(--transition-base);
}

.gate-input-wrapper:focus-within::before {
  opacity: 1;
  animation: border-glow 2s ease-in-out infinite alternate;
}

@keyframes border-glow {
  0% { opacity: 0.6; }
  100% { opacity: 1; }
}

#password-input {
  position: relative;
  width: 100%;
  padding: 14px 50px 14px 20px;
  background: var(--bg-secondary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  z-index: 1;
}

#password-input::placeholder {
  color: var(--text-muted);
}

#password-submit {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#password-submit:hover {
  transform: translateY(-50%) scale(1.05);
  box-shadow: var(--shadow-glow-cyan);
}

#password-submit:active {
  transform: translateY(-50%) scale(0.95);
}

.gate-error {
  color: var(--accent-5);
  font-size: 0.8rem;
  margin-top: var(--space-md);
  height: 1.2em;
  transition: opacity var(--transition-fast);
}

.gate-error.visible {
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(6px); }
}

/* ============================================
   MAIN DASHBOARD
   ============================================ */
#dashboard {
  display: none;
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

#dashboard.active {
  display: block;
  animation: dashboard-in 0.6s ease-out;
}

@keyframes dashboard-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Header --- */
.header {
  padding: var(--space-xl) var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(20px);
  background: rgba(6, 10, 20, 0.8);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-logo {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}

.header-info h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-info .header-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-icon.refreshing {
  animation: spin 1s linear infinite;
}

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

.last-updated {
  color: var(--text-muted);
  font-size: 0.7rem;
  text-align: right;
}

/* --- Tab Navigation --- */
.tab-nav {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-lg) var(--space-2xl) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  border: 1px solid var(--border-subtle);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all var(--transition-base);
  position: relative;
}

.tab-btn:hover {
  color: var(--text-secondary);
  background: var(--bg-glass);
}

.tab-btn.active {
  color: var(--text-primary);
  background: var(--bg-card);
  border-color: var(--border-glass);
  backdrop-filter: blur(20px);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 20%;
  right: 20%;
  height: 2px;
  border-radius: 2px;
}

.tab-btn[data-tab="world"].active::after { background: var(--gradient-world); }
.tab-btn[data-tab="india"].active::after { background: var(--gradient-india); }
.tab-btn[data-tab="investing"].active::after { background: var(--gradient-invest); }
.tab-btn[data-tab="medical"].active::after { background: var(--gradient-medical); }

.tab-btn .tab-icon {
  font-size: 16px;
}

.tab-btn .tab-count {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--text-muted);
  min-width: 28px;
  text-align: center;
}

.tab-btn.active .tab-count {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-secondary);
}

/* --- Content Area --- */
.content-area {
  padding: 0 var(--space-2xl) var(--space-2xl);
}

.tab-panel {
  display: none;
  animation: panel-in 0.35s ease-out;
}

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

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0 var(--space-md);
}

.section-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.section-badge {
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 500;
}

.section-badge.world { background: rgba(6, 182, 212, 0.1); color: var(--accent-1); }
.section-badge.india { background: rgba(245, 158, 11, 0.1); color: var(--accent-3); }
.section-badge.investing { background: rgba(16, 185, 129, 0.1); color: var(--accent-4); }
.section-badge.medical { background: rgba(139, 92, 246, 0.1); color: var(--accent-2); }

/* --- Article Cards --- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: var(--space-md);
}

.article-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  backdrop-filter: blur(20px);
  transition: all var(--transition-base);
  cursor: pointer;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.article-card[data-category="world"]::before { background: var(--gradient-world); }
.article-card[data-category="india"]::before { background: var(--gradient-india); }
.article-card[data-category="investing"]::before { background: var(--gradient-invest); }
.article-card[data-category="medical"]::before { background: var(--gradient-medical); }

.article-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.article-card:hover::before {
  opacity: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.article-source {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.article-time {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.article-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.article-card:hover .article-title {
  color: var(--accent-1);
}

.article-snippet {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-thumbnail {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
  background: var(--bg-glass);
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-subtle);
}

.article-read-more {
  font-size: 0.75rem;
  color: var(--text-accent);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast);
}

.article-card:hover .article-read-more {
  gap: 8px;
}

/* --- Skeleton Loaders --- */
.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.8; }
}

.skeleton-line {
  height: 12px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.skeleton-line.sm { width: 40%; }
.skeleton-line.md { width: 70%; }
.skeleton-line.lg { width: 100%; }
.skeleton-line.title {
  height: 16px;
  margin-bottom: var(--space-md);
}

.skeleton-image {
  width: 100%;
  height: 140px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

/* --- Error State --- */
.error-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-muted);
}

.error-state .error-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.error-state .error-message {
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
}

.btn-retry {
  padding: 10px 24px;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  color: var(--text-primary);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.btn-retry:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

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

.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.4;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
}

@media (max-width: 768px) {
  .header {
    padding: var(--space-md) var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .header-info h1 {
    font-size: 1.1rem;
  }

  .tab-nav {
    padding: var(--space-md) var(--space-lg) 0;
  }

  .content-area {
    padding: 0 var(--space-lg) var(--space-lg);
  }

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

  .tab-btn {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .gate-input-wrapper {
    width: 280px;
  }
}

@media (max-width: 480px) {
  .header {
    padding: var(--space-md);
  }

  .tab-nav {
    padding: var(--space-md) var(--space-md) 0;
  }

  .content-area {
    padding: 0 var(--space-md) var(--space-md);
  }

  .header-logo {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .gate-input-wrapper {
    width: 260px;
  }
}

/* --- Utility: stagger animations for cards --- */
.article-card:nth-child(1) { animation-delay: 0ms; }
.article-card:nth-child(2) { animation-delay: 50ms; }
.article-card:nth-child(3) { animation-delay: 100ms; }
.article-card:nth-child(4) { animation-delay: 150ms; }
.article-card:nth-child(5) { animation-delay: 200ms; }
.article-card:nth-child(6) { animation-delay: 250ms; }
.article-card:nth-child(7) { animation-delay: 300ms; }
.article-card:nth-child(8) { animation-delay: 350ms; }

.article-card {
  animation: card-in 0.4s ease-out both;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Notification Toast --- */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-card);
  z-index: 200;
  animation: toast-in 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.toast.fade-out {
  animation: toast-out 0.3s ease-in forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
}