/* ── CSS Variables ── */
:root {
  --bg: #0f1115;
  --card: #161b22;
  --card-hover: #1c2128;
  --text: #c9d1d9;
  --text-dim: #8b949e;
  --border: #30363d;
  --primary: #238636;
  --primary-hover: #2ea043;
  --danger: #da3633;
  --danger-hover: #f85149;
  --buy: #3fb950;
  --sell: #f85149;
  --support: #58a6ff;
  --resistance: #f0883e;
  --radius: 10px;
  --shadow: 0 4px 12px rgba(0,0,0,0.4);
}

/* ── Reset ── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Navbar ── */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand { font-size: 1.25rem; font-weight: 700; }
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

/* ── Container ── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ── Page Header ── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.page-header h1 { font-size: 1.5rem; }

/* ── Settings Bar ── */
.settings-bar {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

/* ── Asset Grid ── */
.asset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 640px) {
  .asset-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Asset Card ── */
.asset-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: background 0.2s, transform 0.15s;
}
.asset-card:hover {
  background: var(--card-hover);
  transform: translateY(-2px);
}
.asset-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}
.asset-header h2 { font-size: 1.25rem; }
.asset-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.tag {
  font-size: 0.75rem;
  background: var(--bg);
  color: var(--text-dim);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* ── Levels ── */
.levels { margin-bottom: 1rem; }
.level-group { margin-bottom: 0.75rem; }
.level-group strong {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}
.level-list { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.level {
  font-size: 0.85rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-weight: 600;
}
.level.support { background: rgba(88,166,255,0.15); color: var(--support); }
.level.resistance { background: rgba(240,136,62,0.15); color: var(--resistance); }

/* ── Asset Actions ── */
.asset-actions { display: flex; gap: 0.5rem; }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.btn:hover { background: var(--card-hover); }
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { color: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: rgba(218,54,51,0.1); }
.btn-small { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

/* ── Badges ── */
.badge {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
}
.badge-active { background: rgba(63,185,80,0.15); color: var(--buy); }
.badge-paused { background: rgba(139,148,158,0.15); color: var(--text-dim); }
.badge-buy { background: rgba(63,185,80,0.15); color: var(--buy); }
.badge-sell { background: rgba(248,81,73,0.15); color: var(--sell); }

/* ── Forms ── */
.form-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 600px;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}
.hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

/* ── Tables ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.data-table th,
.data-table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.data-table tr:hover { background: var(--card-hover); }

/* ── Login ── */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 100%;
  max-width: 360px;
  text-align: center;
}
.login-card h1 { margin-bottom: 0.5rem; }
.login-card p { color: var(--text-dim); margin-bottom: 1.5rem; }
.login-card input {
  width: 100%;
  padding: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  margin-bottom: 1rem;
  font-size: 1rem;
}
.login-card button { width: 100%; }

/* ── Alerts ── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert-error {
  background: rgba(218,54,51,0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
}
.empty-state a { color: var(--support); text-decoration: none; }
.empty-state a:hover { text-decoration: underline; }

/* ── Utilities ── */
.muted { color: var(--text-dim); }