:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface-hover: #242424;
  --border: #2a2a2a;
  --text: #e4e4e4;
  --text-muted: #888;
  --primary: #6c5ce7;
  --primary-hover: #7c6ef7;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --success: #2ecc71;
  --warning: #f39c12;
  --radius: 8px;
  --max-w: 960px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1rem; }

/* Nav */
nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
nav .container { display: flex; align-items: center; justify-content: space-between; }
nav .brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
nav .links { display: flex; gap: 1rem; }
nav .links a { color: var(--text-muted); font-size: 0.9rem; }
nav .links a:hover, nav .links a.active { color: var(--text); }

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 1rem;
}
.hero h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.hero p { color: var(--text-muted); font-size: 1.15rem; max-width: 540px; margin: 0 auto 1.5rem; }
.hero .btn { display: inline-block; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s;
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { padding: 0.35rem 0.8rem; font-size: 0.8rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.card h3 { margin-bottom: 0.5rem; }

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat-card { text-align: center; }
.stat-card .value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-card .label { color: var(--text-muted); font-size: 0.85rem; }

/* Tables */
.table-wrap { overflow-x: auto; margin-bottom: 1.5rem; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
}
th, td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
th { color: var(--text-muted); font-weight: 600; background: var(--surface-hover); }
tr:hover td { background: var(--surface-hover); }

/* Badge */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-free { background: #333; color: #aaa; }
.badge-basic { background: #1a3a2a; color: var(--success); }
.badge-pro { background: #2a2a4a; color: var(--primary); }
.badge-ultra { background: #3a2a1a; color: var(--warning); }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.3rem; font-size: 0.85rem; color: var(--text-muted); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
}
.form-group textarea { min-height: 80px; resize: vertical; }

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  z-index: 999;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* Loading */
.loading { text-align: center; padding: 2rem; color: var(--text-muted); }
.spinner {
  display: inline-block;
  width: 24px; height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Section */
.section { padding: 2rem 0; }
.section-title { font-size: 1.3rem; margin-bottom: 1rem; }

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.feature-card h3 { margin-bottom: 0.3rem; }
.feature-card p { color: var(--text-muted); font-size: 0.9rem; }

/* Login */
.login-box {
  max-width: 360px;
  margin: 4rem auto;
  text-align: center;
}

/* Detail rows */
.detail-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.detail-row .label { color: var(--text-muted); }
.detail-row:last-child { border-bottom: none; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 90%;
  max-width: 480px;
}
.modal h2 { margin-bottom: 1rem; }
.modal-actions { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 1rem; }