:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1629;
  --bg-card: #151d35;
  --bg-card-hover: #1a2440;
  --bg-input: rgba(255,255,255,0.04);
  --border-color: rgba(255,255,255,0.08);
  --border-active: rgba(99,102,241,0.5);
  --text-primary: #ffffff;
  --text-secondary: rgba(255,255,255,0.6);
  --text-muted: rgba(255,255,255,0.35);
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #fb7185;
  --gradient-accent: linear-gradient(135deg, #38bdf8, #818cf8);
  --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-success: linear-gradient(135deg, #34d399, #059669);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 40px rgba(56, 189, 248, 0.1);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

html, body {
  height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ═══ Scrollbar ═══ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ═══ Page Background Animation ═══ */
.page-bg {
  position: fixed; inset: 0; z-index: 0;
  background: var(--bg-primary);
  overflow: hidden;
}
.page-bg::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.08) 0%, transparent 70%);
  top: -100px; right: -100px;
  animation: float 20s ease-in-out infinite;
}
.page-bg::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(139,92,246,0.06) 0%, transparent 70%);
  bottom: -100px; left: -100px;
  animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

/* ═══ App Container ═══ */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* ═══ Auth Screen ═══ */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-card);
  animation: slideUp 0.5s ease-out;
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}
.auth-logo h1 {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}
.auth-logo p {
  font-size: 13px;
  color: var(--text-muted);
}

.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.auth-tab.active {
  background: var(--accent);
  color: #fff;
}

/* ═══ Form Elements ═══ */
.form-group {
  margin-bottom: 16px;
}
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input::placeholder {
  color: var(--text-muted);
}
.form-input.error {
  border-color: var(--danger);
}

/* ═══ Buttons ═══ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { background: rgba(255,255,255,0.05); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--gradient-accent);
  border: none;
  color: #fff;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(99,102,241,0.3); }

.btn-paypal {
  background: #FFC439;
  border: none;
  color: #000;
  font-weight: 700;
}
.btn-paypal:hover { filter: brightness(1.05); }

.btn-danger {
  background: rgba(239,68,68,0.1);
  border-color: rgba(239,68,68,0.3);
  color: var(--danger);
}
.btn-danger:hover { background: rgba(239,68,68,0.2); }

.btn-sm { padding: 8px 16px; font-size: 12px; }
.btn-lg { padding: 14px 32px; font-size: 15px; }
.btn-block { width: 100%; }
.btn .spinner { width: 16px; height: 16px; }

/* ═══ Dashboard Layout ═══ */
.dashboard {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 10;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}
.sidebar-header h2 {
  font-size: 20px;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sidebar-header small {
  font-size: 11px;
  color: var(--text-muted);
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 11px 16px;
  margin-bottom: 4px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-align: left;
}
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text-primary); }
.nav-item.active {
  background: var(--accent-glow);
  color: var(--accent);
  font-weight: 600;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.nav-divider {
  height: 1px;
  background: var(--border-color);
  margin: 12px 16px;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border-color);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-sm);
}
.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
  flex-shrink: 0;
}
.sidebar-user-info {
  flex: 1;
  min-width: 0;
}
.sidebar-user-name {
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-email {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 32px;
  min-height: 100vh;
}

/* ═══ Cards ═══ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
  transition: var(--transition);
}
.card:hover { border-color: rgba(255,255,255,0.12); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.card-title {
  font-size: 16px;
  font-weight: 700;
}
.card-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ═══ Stats Grid ═══ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px;
  height: 100%;
}
.stat-card.accent::before { background: var(--accent); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.stat-value {
  font-size: 24px;
  font-weight: 800;
}
.stat-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ═══ Subscription Banner ═══ */
.sub-banner {
  position: relative;
  padding: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
}
.sub-banner.active {
  background: linear-gradient(135deg, rgba(16,185,129,0.12), rgba(5,150,105,0.06));
  border: 1px solid rgba(16,185,129,0.2);
}
.sub-banner.warning {
  background: linear-gradient(135deg, rgba(245,158,11,0.12), rgba(217,119,6,0.06));
  border: 1px solid rgba(245,158,11,0.2);
}
.sub-banner.expired {
  background: linear-gradient(135deg, rgba(239,68,68,0.12), rgba(220,38,38,0.06));
  border: 1px solid rgba(239,68,68,0.2);
}
.sub-banner.free {
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.06));
  border: 1px solid rgba(99,102,241,0.2);
}

.sub-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.sub-badge.active { background: rgba(16,185,129,0.15); color: var(--success); }
.sub-badge.warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.sub-badge.expired { background: rgba(239,68,68,0.15); color: var(--danger); }
.sub-badge.free { background: var(--accent-glow); color: var(--accent); }

/* ═══ Plans Grid ═══ */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.plan-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}
.plan-card:hover { border-color: rgba(99,102,241,0.3); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.plan-card.current { border-color: var(--accent); }
.plan-card.current::after {
  content: 'Current';
  position: absolute;
  top: 12px; right: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
}

.plan-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}
.plan-price {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
}
.plan-price span {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
}
.plan-features {
  list-style: none;
  flex: 1;
  margin-bottom: 20px;
}
.plan-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.plan-features li svg { color: var(--success); flex-shrink: 0; }

/* ═══ Table ═══ */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
}
th {
  background: rgba(255,255,255,0.02);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
}
td { color: var(--text-secondary); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}
.badge-success { background: rgba(16,185,129,0.1); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.1); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.1); color: var(--danger); }
.badge-accent { background: var(--accent-glow); color: var(--accent); }

/* ═══ Toast ═══ */
.toast-container {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  animation: slideIn 0.3s ease-out;
  max-width: 400px;
  box-shadow: var(--shadow-card);
}
.toast.success { background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.3); color: var(--success); }
.toast.error { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3); color: var(--danger); }
.toast.info { background: rgba(99,102,241,0.15); border: 1px solid rgba(99,102,241,0.3); color: var(--accent); }

/* ═══ Alert/Banner ═══ */
.alert {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 16px;
}
.alert-warning {
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.2);
  color: var(--warning);
}
.alert-info {
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.2);
  color: var(--accent);
}

/* ═══ Spinner ═══ */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ═══ Loading Screen ═══ */
.loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  flex-direction: column;
  gap: 16px;
}

/* ═══ Animations ═══ */
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* ═══ Mobile Menu Toggle ═══ */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 16px; left: 16px;
  z-index: 20;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 9;
}

/* ═══ Profile Section ═══ */
.profile-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}
.profile-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

/* ═══ Security Section ═══ */
.security-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}
.security-item-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ═══ Responsive ═══ */
@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
  .main-content { margin-left: 0; padding: 20px; padding-top: 60px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .plans-grid { grid-template-columns: 1fr; }
  .profile-header { flex-direction: column; text-align: center; }
  .auth-card { padding: 24px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
}