/* Willi Pool Theme - Light/Dark with CSS Variables */

:root {
  --bg: #ffffff;
  --bg-card: #f8f9fa;
  --bg-header: #ffffff;
  --text: #212529;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --accent: #fd7e14;
  --accent-hover: #e8590c;
  --success: #198754;
  --danger: #dc3545;
  --warning: #ffc107;
  --table-hover: #f1f3f5;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

[data-theme="dark"] {
  --bg: #0f1419;
  --bg-card: #1a1f26;
  --bg-header: #12171c;
  --text: #e8eaed;
  --text-muted: #9aa0a6;
  --border: #2d333b;
  --accent: #fd7e14;
  --accent-hover: #ff922b;
  --success: #2ea043;
  --danger: #f85149;
  --warning: #d29922;
  --table-hover: #21262d;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  transition: background 0.2s, color 0.2s;
}

.header {
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--text);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background: var(--bg-card);
  padding: 0.25rem;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.nav-tabs a {
  padding: 0.4rem 1rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
}

.nav-tabs a.active,
.nav-tabs a:hover {
  background: var(--accent);
  color: white;
}

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
}

.stat-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  padding: 0.75rem 0.6rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

th {
  background: var(--bg);
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  text-align: right;
}

th:hover { background: var(--table-hover); }

tr:hover { background: var(--table-hover); }

.low-hashrate { color: var(--danger); font-weight: 500; }

.center { text-align: center; }

.footer-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 2rem;
}

.footer-text a { color: var(--accent); }

.btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.5rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
}

.btn:hover { background: var(--accent-hover); }

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.alert-warning {
  background: #fff3cd;
  color: #664d03;
  border: 1px solid #ffecb5;
}

[data-theme="dark"] .alert-warning {
  background: #3d2e00;
  color: #ffecb5;
  border-color: #664d03;
}

@media (max-width: 768px) {
  .header { flex-direction: column; align-items: stretch; }
  .nav-tabs { justify-content: center; }
  table { font-size: 0.8rem; }
  th, td { padding: 0.5rem 0.3rem; }
}