/* ============================================================
   CyberNews — Premium Design System
   Mobile-first, dark theme, vanilla CSS
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --color-bg: #0a0e17;
  --color-surface: #111827;
  --color-surface-hover: #1a2233;
  --color-surface-elevated: #1f2937;
  --color-border: #1e293b;
  --color-border-hover: #334155;
  --color-border-accent: #10b981;

  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;

  --color-accent: #10b981;
  --color-accent-hover: #34d399;
  --color-accent-dark: #059669;
  --color-accent-bg: rgba(16, 185, 129, 0.08);
  --color-accent-bg-hover: rgba(16, 185, 129, 0.15);

  --color-danger: #ef4444;
  --color-warning: #f59e0b;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 20px rgba(16,185,129,0.12);

  --transition-fast: 150ms ease;
  --transition: 250ms ease;
  --transition-slow: 350ms ease;

  --container-max: 1280px;
  --container-narrow: 800px;
  --header-height: 64px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
ul, ol { list-style: none; }
body.no-scroll { overflow: hidden; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--color-text); }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }
h3 { font-size: 1.125rem; }
p { color: var(--color-text-secondary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.line-clamp-2 { overflow: hidden; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.line-clamp-3 { overflow: hidden; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }

/* --- Layout --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-md); width: 100%; }
.container--narrow { max-width: var(--container-narrow); }
.main { flex: 1; padding: var(--space-xl) 0; width: 100%; }
.section { margin-bottom: var(--space-2xl); width: 100%; }
.section__header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-lg); gap: var(--space-md); }
.section__link { color: var(--color-accent); font-weight: 500; font-size: 0.875rem; white-space: nowrap; transition: color var(--transition-fast); }
.section__link:hover { color: var(--color-accent-hover); }
.grid { display: grid; gap: var(--space-lg); width: 100%; }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }

/* --- Header --- */
/* --- Shared Visual Utilities --- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-subtle);
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header, 100);
  background: rgba(10, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  transition: all var(--transition-base);
  pointer-events: auto;
}

.header.is-scrolled {
  background: var(--glass-bg);
  border-bottom-color: var(--glass-border);
}
.header__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; gap: var(--space-md);
}
.logo { 
  font-size: 1.375rem; 
  font-weight: 900; 
  letter-spacing: -0.04em; 
  color: var(--color-text-primary); 
  white-space: nowrap; 
  text-decoration: none;
}

.logo span { 
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav { display: none; align-items: center; gap: var(--space-xs); }
@media (min-width: 1024px) { .nav { display: flex; } }

.nav__link {
  position: relative;
  z-index: 10;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8125rem; 
  font-weight: 700;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
}

.nav__link:hover, .nav__link.active { 
  color: var(--color-primary); 
  background: var(--color-primary-soft); 
}
.header__actions { display: flex; align-items: center; gap: var(--space-sm); }
.header__btn {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.header__btn:hover { color: var(--color-text); background: var(--color-accent-bg); }
.header__btn svg { width: 20px; height: 20px; }
.menu-toggle { display: flex; }

/* --- Search Bar --- */
.search-bar {
  position: fixed; top: var(--header-height); left: 0; right: 0;
  background: var(--color-surface); border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  transform: translateY(-100%); opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
  z-index: 45;
  pointer-events: none;
  visibility: hidden;
}
.search-bar.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; visibility: visible; }
.search-form { display: flex; gap: var(--space-sm); }
.search-input {
  flex: 1;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  outline: none;
}
.search-input::placeholder { color: var(--color-text-muted); }
.search-input:focus { border-color: var(--color-accent); }
.search-submit {
  background: var(--color-accent);
  color: #fff; font-weight: 600;
  padding: 0 var(--space-lg);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  white-space: nowrap;
}
.search-submit:hover { background: var(--color-accent-dark); }

/* --- Mobile Menu --- */
.mobile-menu {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.mobile-menu.is-open { opacity: 1; pointer-events: auto; }
.mobile-menu__panel {
  position: absolute; top: 0; right: 0;
  width: min(320px, 85vw); height: 100%;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  transform: translateX(100%);
  transition: transform var(--transition);
  display: flex; flex-direction: column;
  overflow-y: auto;
}
.mobile-menu.is-open .mobile-menu__panel { transform: translateX(0); }
.mobile-menu__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}
.mobile-menu__close {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.mobile-menu__close:hover { color: var(--color-text); background: var(--color-accent-bg); }
.mobile-menu__close svg { width: 20px; height: 20px; }
.mobile-menu__nav { padding: var(--space-md); display: flex; flex-direction: column; gap: var(--space-xs); }
.mobile-menu__link {
  display: flex; align-items: center; gap: var(--space-md);
  padding: var(--space-md) var(--space-md);
  font-size: 1rem; font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  min-height: 48px;
}
.mobile-menu__link:hover { color: var(--color-text); background: var(--color-accent-bg); }
.mobile-menu__link svg { width: 20px; height: 20px; color: var(--color-text-muted); flex-shrink: 0; }
.mobile-menu__search { padding: var(--space-md) var(--space-lg); border-bottom: 1px solid var(--color-border); }
.mobile-menu__search .search-form { flex-direction: column; }

/* --- Filter Drawer (Mobile) --- */
.filter-toggle {
  display: flex; align-items: center; gap: var(--space-sm);
  background: var(--color-surface); border: 1px solid var(--color-border);
  color: var(--color-text-secondary); font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  min-height: 44px;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.filter-toggle:hover { border-color: var(--color-accent); color: var(--color-text); }
.filter-toggle svg { width: 18px; height: 18px; }
/* --- News Grid Image Fallback --- */
.card__image {
  position: relative;
  overflow: hidden;
  height: 240px;
  background: var(--color-bg-card);
  width: 100%;
}
.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card__image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, transparent 100%);
  z-index: 1;
}

.card__image-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-muted);
  gap: var(--space-sm);
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(255, 255, 255, 0.02) 10px,
    rgba(255, 255, 255, 0.02) 20px
  );
}

.card__image-placeholder svg {
  width: 48px;
  height: 48px;
  opacity: 0.2;
  filter: drop-shadow(0 0 8px var(--color-primary-glow));
}

/* --- Filter Bottom Sheet (Mobile) --- */
.filter-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  max-height: 85vh;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  z-index: 1000;
  transform: translateY(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 0 -10px 40px rgba(0,0,0,0.5);
}

.filter-drawer.is-open {
  transform: translateY(0);
}

.filter-drawer::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.filter-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.filter-overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.filter-drawer__header {
  padding: var(--space-xl) var(--space-lg) var(--space-md);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.filter-drawer__header h3 {
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.filter-drawer__body {
  padding: var(--space-lg);
  padding-bottom: env(safe-area-inset-bottom, var(--space-xl));
}

/* --- Sidebar (Desktop Filters) --- */
.news-layout { display: flex; flex-direction: column; gap: var(--space-xl); width: 100%; margin: 0; }
.news-sidebar { display: none; }
.news-content { flex: 1; min-width: 0; width: 100%; margin: 0; }

/* --- Filter Form --- */
.filter-group { margin-bottom: var(--space-lg); }
.filter-group__label {
  display: block; font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--color-text-muted); margin-bottom: var(--space-sm);
}
.filter-input {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast);
}
.filter-input:focus { border-color: var(--color-accent); }
.filter-select {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  color: var(--color-text);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 2rem;
  transition: border-color var(--transition-fast);
}
.filter-select:focus { border-color: var(--color-accent); }
.filter-date-options { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.filter-date-btn {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.8125rem; font-weight: 500;
  background: var(--color-bg); border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  min-height: 36px;
}
.filter-date-btn:hover, .filter-date-btn.active {
  background: var(--color-accent-bg); border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem; font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: 44px;
  cursor: pointer; border: none;
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); }
.btn--secondary {
  background: transparent; color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover { border-color: var(--color-border-hover); color: var(--color-text); background: var(--color-surface); }
.btn--ghost { background: transparent; color: var(--color-accent); }
.btn--ghost:hover { background: var(--color-accent-bg); }
.btn--sm { padding: 0.375rem 0.875rem; font-size: 0.8125rem; min-height: 36px; }
.btn--block { width: 100%; }
.btn svg { width: 16px; height: 16px; }

/* --- Tags --- */
.tag {
  display: inline-flex; align-items: center;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem; font-weight: 500;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  min-height: 32px;
}
.tag:hover { background: var(--color-accent-bg-hover); color: var(--color-accent-hover); }
.tag--lg {
  padding: 0.5rem 1rem; font-size: 0.875rem; min-height: 40px;
}
.tag__count {
  margin-left: var(--space-sm);
  font-size: 0.6875rem; font-weight: 600;
  background: rgba(16,185,129,0.15);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
}
.tags-wrap { display: flex; flex-wrap: wrap; gap: var(--space-sm); }

/* --- Cards (News) --- */
.card {
  background: #111827; /* Force explicit surface color */
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;
  margin: 0;
  height: 100%; /* Fill grid row */
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--glass-highlight) 0%, transparent 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-premium), var(--shadow-glow);
  transform: translateY(-4px) scale(1.01);
  background: var(--color-bg-hover);
}

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

.card:hover .card__image img {
  transform: scale(1.08);
}
.card__body { padding: var(--space-lg); }
.card__meta {
  display: flex; align-items: center; gap: var(--space-sm);
  font-size: 0.75rem; color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}
.card__meta-dot { color: var(--color-border-hover); }
.card__title {
  font-size: 1.0625rem; font-weight: 700; line-height: 1.4;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}
.card__title a { transition: color var(--transition-fast); }
.card__title a:hover { color: var(--color-accent); }
.card__excerpt { font-size: 0.875rem; color: var(--color-text-secondary); margin-bottom: var(--space-md); line-height: 1.6; }
.card__footer { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }
.card__read-more {
  display: inline-flex; align-items: center; gap: var(--space-xs);
  font-size: 0.8125rem; font-weight: 600;
  color: var(--color-accent);
  transition: color var(--transition-fast);
}
.card__read-more:hover { color: var(--color-accent-hover); }
.card__read-more svg { width: 14px; height: 14px; transition: transform var(--transition-fast); }
.card__read-more:hover svg { transform: translateX(3px); }

/* Featured Card */
.card--featured { grid-column: 1 / -1; }
.card--featured .card__image { height: 240px; }
.card--featured .card__title { font-size: 1.375rem; }

/* --- Hero --- */
.hero {
  text-align: center;
  padding: var(--space-3xl) 0 var(--space-2xl);
  position: relative;
  background: 
    radial-gradient(circle at 50% 10%, var(--color-primary-soft) 0%, transparent 70%),
    radial-gradient(circle at 80% 80%, var(--color-accent-soft) 0%, transparent 50%);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 50%, black, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, black, transparent 80%);
  opacity: 0.15;
  pointer-events: none;
}

.hero__title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
  position: relative;
  z-index: 1;
}

.hero__title .text-accent {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--space-xl);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

@media (min-width: 768px) {
  .stats-bar { grid-template-columns: repeat(4, 1fr); }
}

.stat {
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.stat::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.stat:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-glow);
  background: var(--color-bg-hover);
}

.stat:hover::before {
  opacity: 1;
}

.stat__value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.8125rem; color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}
.breadcrumbs a { color: var(--color-text-muted); transition: color var(--transition-fast); }
.breadcrumbs a:hover { color: var(--color-accent); }
.breadcrumbs__sep { color: var(--color-border-hover); }

/* --- Article Detail --- */
.article-header { margin-bottom: var(--space-2xl); }
.article-header__title { font-size: 1.75rem; font-weight: 800; line-height: 1.2; margin-bottom: var(--space-lg); letter-spacing: -0.01em; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-md); font-size: 0.875rem; color: var(--color-text-muted); margin-bottom: var(--space-lg); }
.article-meta__item { display: flex; align-items: center; gap: var(--space-xs); }
.article-meta__item svg { width: 16px; height: 16px; }
.article-hero-image {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-2xl);
  max-height: 480px;
}
.article-hero-image img { width: 100%; height: auto; object-fit: cover; max-height: 480px; }
.article-content {
  font-size: 1.0625rem; line-height: 1.8;
  color: var(--color-text-secondary);
}
.article-content p { margin-bottom: var(--space-md); }
.article-content strong { color: var(--color-text); font-weight: 600; }
.article-content a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 2px; }
.article-actions { display: flex; flex-wrap: wrap; gap: var(--space-md); margin: var(--space-2xl) 0; }
.article-source-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
}
.related-section { border-top: 1px solid var(--color-border); padding-top: var(--space-2xl); margin-top: var(--space-2xl); }

/* --- Tag Page Header --- */
.tag-header {
  background: linear-gradient(135deg, var(--color-accent-bg) 0%, transparent 50%);
  border: 1px solid rgba(16,185,129,0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}
.tag-header__name { font-size: 1.75rem; font-weight: 800; color: var(--color-accent); margin-bottom: var(--space-sm); }
.tag-header__meta { font-size: 0.875rem; color: var(--color-text-muted); }

/* --- Tag Grid --- */
.tag-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column;
}
.tag-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-glow); }
.tag-card__name { font-size: 1.125rem; font-weight: 700; color: var(--color-accent); margin-bottom: var(--space-xs); }
.tag-card__desc { font-size: 0.8125rem; color: var(--color-text-muted); margin-bottom: var(--space-md); flex: 1; }
.tag-card__count { font-size: 0.75rem; color: var(--color-text-muted); }
.tag-mini {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.tag-mini:hover { border-color: var(--color-accent); background: var(--color-accent-bg); }
.tag-mini__name { font-size: 0.875rem; font-weight: 600; color: var(--color-accent); }
.tag-mini__count { font-size: 0.6875rem; color: var(--color-text-muted); margin-top: 2px; }

/* --- Source Card --- */
.source-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.source-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-glow); }
.source-card__icon {
  width: 48px; height: 48px;
  background: var(--color-accent-bg);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-md);
}
.source-card__icon svg { width: 24px; height: 24px; color: var(--color-accent); }
.source-card__title { font-size: 1.0625rem; font-weight: 700; margin-bottom: var(--space-xs); }
.source-card__category { font-size: 0.75rem; color: var(--color-text-muted); margin-bottom: var(--space-md); }
.source-card__footer { display: flex; justify-content: space-between; align-items: center; font-size: 0.8125rem; }
.source-card__link { color: var(--color-accent); font-weight: 500; transition: color var(--transition-fast); }
.source-card__link:hover { color: var(--color-accent-hover); }
.source-card__count { color: var(--color-text-muted); }

/* --- Pagination --- */
.pagination { display: flex; justify-content: center; align-items: center; gap: var(--space-sm); margin-top: var(--space-2xl); }
.pagination__item {
  display: flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px;
  padding: 0 var(--space-sm);
  font-size: 0.875rem; font-weight: 500;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}
.pagination__item:hover { border-color: var(--color-border-hover); color: var(--color-text); }
.pagination__item.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.pagination__item.disabled { opacity: 0.4; pointer-events: none; }

/* --- Page Header --- */
.page-header { margin-bottom: var(--space-xl); }
.page-header__title { margin-bottom: var(--space-sm); }
.page-header__subtitle { color: var(--color-text-muted); font-size: 0.875rem; }

/* --- Empty State --- */
.empty-state { text-align: center; padding: var(--space-3xl) var(--space-lg); }
.empty-state__icon { color: var(--color-text-muted); opacity: 0.3; margin-bottom: var(--space-lg); }
.empty-state__icon svg { width: 64px; height: 64px; margin: 0 auto; }
.empty-state__title { font-size: 1.25rem; font-weight: 600; margin-bottom: var(--space-sm); }
.empty-state__text { color: var(--color-text-muted); margin-bottom: var(--space-xl); max-width: 400px; margin-left: auto; margin-right: auto; }
.empty-state__actions { display: flex; flex-wrap: wrap; gap: var(--space-md); justify-content: center; }

/* --- Search Page --- */
.search-hero { margin-bottom: var(--space-xl); }
.search-hero .search-form { max-width: 640px; }
.search-hero .search-input { font-size: 1.125rem; padding: 0.875rem 1.25rem; }
.search-hero .search-submit { padding: 0 var(--space-xl); }
.search-hero__count { margin-top: var(--space-md); font-size: 0.875rem; color: var(--color-text-muted); }

/* --- Footer --- */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0 var(--space-xl);
  margin-top: auto;
}
.footer__grid { display: grid; grid-template-columns: 1fr; gap: var(--space-xl); }
.footer__brand-desc { font-size: 0.875rem; color: var(--color-text-muted); margin-top: var(--space-sm); line-height: 1.6; }
.footer__heading { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); margin-bottom: var(--space-md); }
.footer__links { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer__link { font-size: 0.875rem; color: var(--color-text-secondary); transition: color var(--transition-fast); }
.footer__link:hover { color: var(--color-accent); }
.footer__bottom {
  margin-top: var(--space-xl); padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: center; font-size: 0.75rem; color: var(--color-text-muted);
}

/* --- Skeleton Loader --- */
.skeleton { background: var(--color-surface-elevated); border-radius: var(--radius-md); animation: skeleton-pulse 1.5s ease-in-out infinite; }
.skeleton--text { height: 1rem; margin-bottom: var(--space-sm); }
.skeleton--text-sm { height: 0.75rem; width: 60%; }
.skeleton--heading { height: 1.5rem; margin-bottom: var(--space-md); }
.skeleton--image { height: 180px; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.skeleton--tag { height: 28px; width: 80px; border-radius: var(--radius-full); display: inline-block; }

/* --- About Page --- */
.about-feature {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
}
.about-feature__icon {
  width: 56px; height: 56px;
  background: var(--color-accent-bg);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-md);
}
.about-feature__icon svg { width: 28px; height: 28px; color: var(--color-accent); }
.about-feature__title { font-size: 1.0625rem; font-weight: 700; margin-bottom: var(--space-sm); }
.about-feature__desc { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.6; }
.about-cta {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-accent-bg) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
}

/* --- 404 --- */
.error-page { text-align: center; padding: var(--space-3xl) 0; }
.error-page__code { font-size: 5rem; font-weight: 800; color: var(--color-accent); line-height: 1; margin-bottom: var(--space-md); }

/* --- Reading Progress Bar --- */
.reading-progress {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: var(--z-header);
  transition: width 0.1s ease;
  box-shadow: 0 0 10px var(--color-primary-glow);
}

/* --- Animations --- */
@keyframes skeleton-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

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

.animate-in {
  animation: fade-in-up 0.6s var(--transition-base) both;
}

/* --- Highlighting --- */
mark.highlight {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  font-weight: 700;
  padding: 0 2px;
  border-radius: 2px;
}

/* --- Utilities --- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.w-full { width: 100%; }

/* ============================================================
   Responsive — min-width (mobile-first)
   ============================================================ */
@media (min-width: 640px) {
  h1 { font-size: 2rem; }
  .hero__title { font-size: 2.5rem; }
  .article-header__title { font-size: 2.25rem; }
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(4, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .card--featured .card__image { height: 280px; }
}

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
  .nav { display: flex; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .hero__title { font-size: 3rem; }
  .article-header__title { font-size: 2.75rem; }
  .news-layout { flex-direction: row; align-items: flex-start; justify-content: center; }
  .news-sidebar { display: block; width: 300px; flex-shrink: 0; margin-left: var(--space-xl); }
  .news-sidebar__inner { position: sticky; top: calc(var(--header-height) + var(--space-lg)); }
  .sidebar-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
  }
  .sidebar-card__title { font-size: 0.875rem; font-weight: 700; margin-bottom: var(--space-md); }
  .filter-toggle { display: none; }
  .filter-drawer, .filter-overlay { display: none !important; }
  .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

@media (min-width: 1280px) {
  .news-sidebar { width: 300px; }
  .card--featured .card__image { height: 320px; }
  .card--featured .card__title { font-size: 1.5rem; }
}