/* ============================================
   LITECOIN.WATCH v2 — Fintech Design System
   ============================================ */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root {
  /* Light theme */
  --bg-primary: #f8f9fb;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f3f8;
  --bg-card: #ffffff;
  --bg-card-hover: #f6f7fb;
  --bg-header: rgba(255,255,255,0.82);
  --bg-hero: linear-gradient(135deg, #0a1628 0%, #0f2847 50%, #0c1f3d 100%);
  --bg-input: #f1f3f8;
  --border-color: #e2e6ef;
  --border-light: #eef0f5;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;
  --accent: #0679c2;
  --accent-hover: #0560a0;
  --accent-light: rgba(6,121,194,0.08);
  --green: #16a34a;
  --green-bg: rgba(22,163,74,0.08);
  --red: #dc2626;
  --red-bg: rgba(220,38,38,0.08);
  --blue: #3b82f6;
  --blue-bg: rgba(59,130,246,0.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --transition: 0.2s ease;
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #0b1120;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2236;
  --bg-card: #151d2e;
  --bg-card-hover: #1a2540;
  --bg-header: rgba(11,17,32,0.88);
  --bg-hero: linear-gradient(135deg, #020617 0%, #0a1628 50%, #071222 100%);
  --bg-input: #1a2236;
  --border-color: #1e293b;
  --border-light: #1a2236;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-inverse: #ffffff;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --accent-light: rgba(56,189,248,0.1);
  --green: #22c55e;
  --green-bg: rgba(34,197,94,0.12);
  --red: #ef4444;
  --red-bg: rgba(239,68,68,0.12);
  --blue: #60a5fa;
  --blue-bg: rgba(96,165,250,0.1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.03);
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --- Typography --- */
h1,h2,h3,h4 { font-weight: 700; line-height: 1.25; letter-spacing: -0.02em; }
h1 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.875rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.375rem); }
p { color: var(--text-secondary); line-height: 1.7; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* --- Layout --- */
.wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 64px 0;
}
.section-header {
  margin-bottom: 32px;
}
.section-header h2 {
  margin-bottom: 8px;
}
.section-header p {
  font-size: 1.05rem;
}

/* --- Sticky Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  gap: 20px;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 24px;
}
.header-logo img {
  height: 46px;
  width: auto;
  display: block;
  transition: filter var(--transition);
}
/* Dark mode: invert the dark text in the SVG logo to white */
[data-theme="dark"] .header-logo img,
[data-theme="dark"] .footer-logo {
  filter: brightness(0) invert(1);
}
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* --- LTC Price Badge (header) --- */
.ltc-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 18px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 40px;
  font-size: 1rem;
  white-space: nowrap;
  transition: background var(--transition);
}
.ltc-box:hover { background: var(--bg-card-hover); }
.ltc-box .logobox {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ltc-box .logobox img {
  width: 34px;
  height: 34px;
}
.ltc-quote {
  display: flex;
  align-items: center;
  gap: 10px;
}
.ltc-quote strong {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}
.ticker-top {
  font-size: 0.88rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 6px;
}
.ticker-top.green { color: var(--green); background: var(--green-bg); }
.ticker-top.red { color: var(--red); background: var(--red-bg); }
.green2 { color: var(--green) !important; }
.red2 { color: var(--red) !important; }
.blue2 { color: var(--blue) !important; }

/* --- Navigation --- */
.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
}
.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--accent);
  background: var(--accent-light);
}

/* --- Theme Toggle --- */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-tertiary);
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--accent);
  border-color: var(--accent);
}

/* --- Mobile Menu Toggle --- */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-tertiary);
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-secondary);
}

/* --- Hero Section (Dashboard) --- */
.hero {
  background: var(--bg-hero);
  padding: 48px 0 56px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6,121,194,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(56,189,248,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 40px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 20px;
}
.hero-label .dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}
.hero-price-row {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.hero-price {
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 6vw, 4rem);
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.03em;
  line-height: 1;
}
.hero-change {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
}
.hero-change.up { background: rgba(34,197,94,0.15); color: #4ade80; }
.hero-change.down { background: rgba(239,68,68,0.15); color: #f87171; }
.hero-change svg { width: 16px; height: 16px; }
.hero-subtitle {
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

/* Hero metrics cards */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 32px;
}
.metric-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: background var(--transition);
}
.metric-card:hover {
  background: rgba(255,255,255,0.07);
}
.metric-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  background: var(--bg-tertiary);
  padding: 4px;
  border-radius: var(--radius-md);
  width: fit-content;
}
.tab-btn {
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-tertiary);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active {
  color: var(--text-primary);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}

/* --- Search Input --- */
.search-bar {
  position: relative;
  margin-bottom: 16px;
  max-width: 360px;
}
.search-bar input {
  width: 100%;
  padding: 10px 16px 10px 40px;
  font-size: 0.88rem;
  font-family: var(--font);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-bar input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.search-bar input::placeholder { color: var(--text-tertiary); }
.search-bar .search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 0.9rem;
  pointer-events: none;
}

/* --- Rates Table --- */
.rates-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.rates-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.rates-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}
.rates-table thead th {
  padding: 12px 16px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: color var(--transition);
}
.rates-table thead th:hover { color: var(--text-primary); }
.rates-table thead th.align-right,
.rates-table td.align-right { text-align: right; }
.rates-table thead th.center,
.rates-table td.center { text-align: center; }
.rates-table thead th .sort-arrow {
  display: inline-block;
  margin-left: 4px;
  opacity: 0.3;
  font-size: 0.7rem;
}
.rates-table thead th.sorted .sort-arrow { opacity: 1; color: var(--accent); }

.rates-table tbody tr {
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition);
}
.rates-table tbody tr:last-child { border-bottom: none; }
.rates-table tbody tr:hover { background: var(--bg-card-hover); }
.rates-table tbody td {
  padding: 12px 16px;
  font-size: 0.9rem;
  vertical-align: middle;
}
.rates-table .currency-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}
.rates-table .crypto-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
}
.rates-table .fi {
  width: 24px;
  height: 18px;
  border-radius: 3px;
  flex-shrink: 0;
}
.rates-table .rate-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
}

/* Category header rows */
.rates-table .category-header td {
  padding: 10px 16px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}

/* Delta (change) badges */
.delta {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  min-width: 70px;
  justify-content: center;
  padding: 3px 8px;
  border-radius: 6px;
  transition: background var(--transition);
}
.delta.green2 { background: var(--green-bg); color: var(--green) !important; }
.delta.red2 { background: var(--red-bg); color: var(--red) !important; }
.delta.blue2 { background: var(--blue-bg); color: var(--blue) !important; }

/* Price flash animation */
@keyframes flash-green {
  0% { background: rgba(34,197,94,0.15); }
  100% { background: transparent; }
}
@keyframes flash-red {
  0% { background: rgba(239,68,68,0.15); }
  100% { background: transparent; }
}
.flash-up { animation: flash-green 0.6s ease-out; }
.flash-down { animation: flash-red 0.6s ease-out; }

/* --- Converter Section --- */
.converter-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 32px;
  max-width: 600px;
}
.converter-row {
  display: flex;
  align-items: stretch;
  gap: 12px;
  margin-bottom: 16px;
}
.converter-input-group {
  flex: 1;
  position: relative;
}
.converter-input-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.converter-input-group input,
.converter-input-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--font-mono);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}
.converter-input-group input:focus,
.converter-input-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.converter-swap {
  display: flex;
  align-items: flex-end;
  padding-bottom: 4px;
}
.converter-swap button {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 50%;
  cursor: pointer;
  color: var(--accent);
  font-size: 1.1rem;
  transition: all var(--transition);
}
.converter-swap button:hover {
  background: var(--accent);
  color: #fff;
}
.converter-result {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: 16px 0 8px;
}
.converter-rate-info {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}
.quick-currencies {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.quick-btn {
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
}
.quick-btn:hover, .quick-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
}

/* --- Articles / News --- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.article-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.article-thumb {
  height: 180px;
  background: var(--bg-hero);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-thumb-icon {
  font-size: 3rem;
  opacity: 0.25;
  color: #fff;
}
.article-category {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  background: rgba(6,121,194,0.8);
  border-radius: 6px;
  backdrop-filter: blur(8px);
}
.article-body {
  padding: 20px;
}
.article-body h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  line-height: 1.4;
}
.article-body h3 a {
  color: var(--text-primary);
  transition: color var(--transition);
}
.article-body h3 a:hover { color: var(--accent); }
.article-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* --- Two Column Layout --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 32px;
  align-items: start;
}

/* --- Sidebar --- */
.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 24px;
  margin-bottom: 20px;
}
.sidebar-card h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

/* Cross rates mini table */
.cross-rates {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.cross-rates th, .cross-rates td {
  padding: 8px 6px;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}
.cross-rates th {
  font-weight: 700;
  color: var(--text-tertiary);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}
.cross-rates td {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--text-primary);
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
  margin-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p {
  font-size: 0.88rem;
  margin-top: 12px;
}
.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 8px;
}
.footer-col a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-disclaimer {
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  line-height: 1.7;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.82rem;
  color: var(--text-tertiary);
}
.footer-bottom b { color: var(--accent); }
.footer-bottom span { color: var(--text-primary); }

/* --- Update Info Bar --- */
.update-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}
.update-bar .live-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: var(--green);
  border-radius: 50%;
  margin-right: 6px;
  animation: pulse-dot 2s ease-in-out infinite;
}

/* --- Content Article (full page) --- */
.content-article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
  margin-top: 32px;
}
.content-article h2 {
  margin-top: 32px;
  margin-bottom: 12px;
}
.content-article h2:first-child { margin-top: 0; }
.content-article h3 {
  margin-top: 24px;
  margin-bottom: 8px;
}
.content-article p {
  margin-bottom: 16px;
}
.content-article ul, .content-article ol {
  margin: 0 0 16px 24px;
  color: var(--text-secondary);
}
.content-article li {
  margin-bottom: 6px;
  line-height: 1.7;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .two-col {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .wrap { padding: 0 16px; }
  .section { padding: 40px 0; }
  .header-inner { height: 64px; }
  .header-logo img { height: 36px; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-header);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 8px 16px 16px;
  }
  .main-nav.open { display: block; }
  .main-nav ul {
    flex-direction: column;
    gap: 2px;
  }
  .main-nav a {
    padding: 10px 14px;
  }
  .menu-toggle { display: flex; }

  .ltc-box {
    padding: 6px 12px;
    font-size: 0.9rem;
  }
  .ltc-box .logobox img { width: 28px; height: 28px; }

  .hero { padding: 32px 0 40px; }
  .hero-price { font-size: 2.4rem; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .metric-card { padding: 12px 14px; }
  .metric-value { font-size: 1rem; }

  .rates-table { min-width: 520px; }
  .rates-table tbody td { padding: 10px 12px; }

  .converter-row { flex-direction: column; }
  .converter-swap {
    justify-content: center;
    padding: 0;
  }
  .converter-card { padding: 20px; }

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

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .content-article { padding: 20px; }
}

@media (max-width: 480px) {
  .hero-metrics { grid-template-columns: 1fr 1fr; gap: 8px; }
  .hero-change { font-size: 0.85rem; padding: 4px 10px; }
  .tabs { width: 100%; }
  .tab-btn { flex: 1; text-align: center; padding: 8px 10px; font-size: 0.82rem; }
}

/* ============================================
   Articles Listing & Cards
   ============================================ */

.articles-filters {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.filter-chip {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: all 0.15s;
}
.filter-chip:hover { border-color: var(--accent); color: var(--accent); }
.filter-chip--active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.article-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.article-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.article-card__image {
  height: 180px;
  background-size: cover;
  background-position: center;
  background-color: var(--bg-tertiary);
}
.article-card__image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.article-card__body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card__cat {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
  width: fit-content;
}
.article-card__cat--guide    { background: #1e40af18; color: #60a5fa; }
.article-card__cat--news     { background: #7c3aed18; color: #a78bfa; }
.article-card__cat--analysis { background: #b4590018; color: #fb923c; }

[data-theme="light"] .article-card__cat--guide    { background: #1e40af12; color: #2563eb; }
[data-theme="light"] .article-card__cat--news     { background: #7c3aed12; color: #7c3aed; }
[data-theme="light"] .article-card__cat--analysis { background: #b4590012; color: #b45900; }

.article-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.35;
}

.article-card__excerpt {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card__meta {
  display: flex;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin: 32px 0;
}
.pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: all 0.15s;
}
.pagination__link:hover { border-color: var(--accent); color: var(--accent); }
.pagination__link--active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

@media (max-width: 700px) {
  .articles-grid { grid-template-columns: 1fr; }
}

/* ============================================
   Author Box (E-E-A-T)
   ============================================ */

.author-box {
  display: flex;
  gap: 20px;
  padding: 24px;
  margin-top: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

.author-box__avatar {
  flex-shrink: 0;
}
.author-box__avatar img {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-tertiary);
}

.author-box__info {
  flex: 1;
  min-width: 0;
}

.author-box__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

.author-box__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.author-box__role {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-top: 2px;
}

.author-box__bio {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 10px;
}

.author-box__credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.author-box__cred {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
  border-radius: 6px;
}
.author-box__cred::before {
  content: "\2713";
  color: var(--green);
  font-weight: 700;
}

.author-box__links {
  display: flex;
  gap: 8px;
}

.author-box__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
  transition: background 0.15s, color 0.15s;
}
.author-box__link:hover {
  background: var(--accent);
  color: #fff;
}

@media (max-width: 600px) {
  .author-box { flex-direction: column; align-items: center; text-align: center; }
  .author-box__header { flex-direction: column; align-items: center; }
  .author-box__credentials { justify-content: center; }
  .author-box__links { justify-content: center; }
}