:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242836;
  --border: #2e3345;
  --text: #e8eaed;
  --text-muted: #9aa0b0;
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1280px; margin: 0 auto; padding: 0 20px; }

/* NAV */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  text-decoration: none;
}
.logo-icon { font-size: 1.4rem; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}
.btn-sm { padding: 7px 14px; font-size: 0.85rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-block { width: 100%; justify-content: center; }

/* HERO */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 40px 0;
}
.feature-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.feature-card p { color: var(--text-muted); font-size: 0.95rem; }
.feature-icon {
  width: 48px; height: 48px;
  background: rgba(99,102,241,0.15);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

/* STATS */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.stat-card .value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
}
.stat-card .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* TABLES */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
tr:hover td { background: rgba(255,255,255,0.02); }

/* BADGES */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}
.badge-pending { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-paid { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-failed { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-cancelled { background: rgba(156,163,175,0.15); color: #9ca3af; }
.badge-active { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-inactive { background: rgba(239,68,68,0.15); color: var(--danger); }

/* FORMS */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: 0.9rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 11px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.15s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}
.form-group .hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* CODE */
pre, code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
}
pre {
  background: #0d0f14;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  overflow-x: auto;
  margin: 12px 0 20px;
  line-height: 1.5;
}
code.inline {
  background: var(--surface2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}
.copy-btn {
  float: right;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
}
.copy-btn:hover { color: var(--text); }

/* KEYS BOX */
.keys-box {
  background: #0d0f14;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  padding: 24px;
  margin: 24px 0;
}
.keys-box h3 { margin-bottom: 16px; color: var(--primary); }
.key-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.key-row label { font-size: 0.85rem; color: var(--text-muted); min-width: 80px; }
.key-value {
  background: var(--surface2);
  padding: 8px 14px;
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.9rem;
  flex: 1;
  word-break: break-all;
}

/* FLASH */
.flash-container { max-width: 1100px; margin: 16px auto 0; padding: 0 20px; }
.flash {
  padding: 12px 18px;
  border-radius: 8px;
  margin-bottom: 8px;
  font-size: 0.95rem;
}
.flash-error { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }
.flash-success { background: rgba(34,197,94,0.15); color: var(--success); border: 1px solid rgba(34,197,94,0.3); }

/* STEPS */
.steps { counter-reset: step; margin: 32px 0; }
.step {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
  position: relative;
}
.step-num {
  flex-shrink: 0;
  width: 40px; height: 40px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}
.step-content { flex: 1; }
.step-content h3 { margin-bottom: 8px; }
.step-content p { color: var(--text-muted); margin-bottom: 12px; }

/* TABS */
.tabs { display: flex; gap: 4px; margin-bottom: 16px; flex-wrap: wrap; }
.tab {
  padding: 8px 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px 8px 0 0;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
}
.tab.active {
  background: var(--surface);
  color: var(--primary);
  border-bottom-color: var(--surface);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ADMIN LAYOUT */
.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 12px;
}
.admin-header h1 { font-size: 1.6rem; }
.admin-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.admin-nav a {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
}
.admin-nav a:hover, .admin-nav a.active {
  color: var(--primary);
  border-color: var(--primary);
}

/* LOGIN */
.login-box {
  max-width: 400px;
  margin: 80px auto;
}

/* FOOTER */
.footer {
  margin-top: auto;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* SECTION */
.section { padding: 40px 0; }
.section-title {
  font-size: 1.5rem;
  margin-bottom: 8px;
}
.section-sub {
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* RESPONSIVE */
@media (max-width: 640px) {
  .hero h1 { font-size: 2rem; }
  .nav-links { gap: 12px; }
  .nav-links a:not(.btn) { display: none; }
}