:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #6366f1;
  --primary-strong: #4338ca;
  --green: #16a34a;
  --red: #dc2626;
  --shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
  --radius: 14px;
}

[data-theme='dark'] {
  --bg: #0b1120;
  --surface: #111c34;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #1e293b;
  --primary: #818cf8;
  --primary-strong: #6366f1;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.25s, color 0.25s;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

.hero {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
  color: #fff;
  padding: 28px 0 32px;
  box-shadow: var(--shadow);
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  font-size: 38px;
  background: rgba(255, 255, 255, 0.15);
  width: 60px; height: 60px;
  border-radius: 16px;
  display: grid; place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.brand h1 { margin: 0; font-size: 1.75rem; font-weight: 900; letter-spacing: -0.5px; }
.brand p { margin: 4px 0 0; opacity: 0.85; font-size: 0.92rem; }

.hero-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.hero-actions select,
.hero-actions button {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 9px 16px;
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.hero-actions select:hover,
.hero-actions button:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}
.hero-actions select option { color: #0f172a; }

.toolbar {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  margin: 24px 0 14px;
}
.toolbar input,
.toolbar select,
.toolbar button {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 14px;
  border-radius: var(--radius);
  font: inherit;
}
.toolbar input { width: 100%; }
.toolbar button { cursor: pointer; transition: background 0.2s, border-color 0.2s; }
.toolbar button[aria-pressed='true'] {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.sort { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 0.9rem; }

.status {
  margin: 8px 0 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.table-wrap {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.crypto-table {
  width: 100%;
  border-collapse: collapse;
  text-align: right;
  min-width: 720px;
}
.crypto-table th,
.crypto-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.crypto-table thead th {
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  font-weight: 700;
  color: var(--text);
  position: sticky; top: 0;
}
.crypto-table tbody tr:hover { background: color-mix(in srgb, var(--primary) 6%, transparent); }

.coin {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.coin img { width: 26px; height: 26px; border-radius: 50%; }
.coin .symbol { color: var(--muted); text-transform: uppercase; font-size: 0.8rem; }

.price { font-weight: 700; }
.change-up { color: var(--green); font-weight: 700; }
.change-down { color: var(--red); font-weight: 700; }

.fav-btn {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--muted);
  transition: transform 0.15s;
}
.fav-btn.active { color: #f59e0b; }
.fav-btn:hover { transform: scale(1.15); }

.footer-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 28px 0 36px;
}
.footer-note a { color: var(--primary); text-decoration: none; }
.footer-note a:hover { text-decoration: underline; }

@media (max-width: 640px) {
  .toolbar { grid-template-columns: 1fr; }
  .brand h1 { font-size: 1.4rem; }
  .hero-actions { width: 100%; justify-content: flex-end; }
}