@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --primary: #6366F1;
  --primary-hover: #4F46E5;
  --primary-light: #EEF2FF;
  --bg: #F8FAFC;
  --bg-card: #FFFFFF;
  --text: #0F172A;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --sidebar-bg: #FFFFFF;
  --header-bg: #FFFFFF;
  --danger: #EF4444;
  --success: #22C55E;
  --warning: #F59E0B;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
  --radius: 8px;
  --sidebar-width: 240px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

a:hover {
  color: var(--primary-hover);
}

/* ── Auth Pages ─────────────────────────────────────────── */

.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg) 50%);
}

.auth-card {
  background: var(--bg-card);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--border);
}

.auth-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 8px;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 14px;
}

/* ── Forms ───────────────────────────────────────────────── */

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-card);
  color: var(--text);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* ── Buttons ─────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

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

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ── Layout ──────────────────────────────────────────────── */

.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s;
}

.sidebar-logo {
  padding: 20px 24px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 4px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.sidebar-nav .nav-icon {
  font-size: 18px;
  width: 20px;
  text-align: center;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text);
  padding: 4px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-muted);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
}

.page-content {
  flex: 1;
  padding: 24px;
}

.footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Cards ───────────────────────────────────────────────── */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}

/* ── Plan Cards ──────────────────────────────────────────── */

.plan-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  transition: border-color 0.2s;
}

.plan-card.featured {
  border-color: var(--primary);
  position: relative;
}

.plan-card.featured::before {
  content: 'Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 12px;
  border-radius: 12px;
}

.plan-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.plan-price {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.plan-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin: 20px 0;
  text-align: left;
}

.plan-features li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.plan-features li::before {
  content: '✓ ';
  color: var(--success);
  font-weight: 600;
}

/* ── Tables ──────────────────────────────────────────────── */

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Badges ──────────────────────────────────────────────── */

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.badge-trial { background: #FEF3C7; color: #92400E; }
.badge-active { background: #DCFCE7; color: #166534; }
.badge-expired { background: #FEE2E2; color: #991B1B; }
.badge-spark { background: var(--primary-light); color: var(--primary); }
.badge-base { background: #DBEAFE; color: #1E40AF; }

/* ── Banner ──────────────────────────────────────────────── */

.trial-banner {
  background: #FEF3C7;
  color: #92400E;
  padding: 12px 24px;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  border-bottom: 1px solid #FDE68A;
}

.trial-banner a {
  color: #92400E;
  font-weight: 600;
  text-decoration: underline;
}

.trial-banner.expired {
  background: #FEE2E2;
  color: #991B1B;
  border-color: #FECACA;
}

.trial-banner.expired a {
  color: #991B1B;
}

/* ── Alerts ──────────────────────────────────────────────── */

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error {
  background: #FEE2E2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.alert-success {
  background: #DCFCE7;
  color: #166534;
  border: 1px solid #BBF7D0;
}

/* ── Theme Toggle ────────────────────────────────────────── */

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-muted);
  transition: all 0.2s;
}

.theme-toggle:hover {
  background: var(--bg);
}

/* ── Page Title ──────────────────────────────────────────── */

.page-header {
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
}

.page-header p {
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 4px;
}

/* ── Auth Link ───────────────────────────────────────────── */

.auth-link {
  text-align: center;
  margin-top: 24px;
  font-size: 14px;
  color: var(--text-muted);
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .menu-toggle {
    display: block;
  }

  .page-content {
    padding: 16px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}