/* ===== CSS Variables & Reset ===== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #1f1f35;
  --bg-input: #16162a;
  --border-color: rgba(99, 102, 241, 0.15);
  --border-hover: rgba(99, 102, 241, 0.35);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);
  --purple: #8b5cf6;
  --pink: #ec4899;
  --cyan: #06b6d4;
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
  --topbar-height: 72px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: 14px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== Login Screen ===== */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #0a0a1a 0%, #1a1a3e 50%, #0f0f2a 100%);
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 48px 40px;
  background: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  z-index: 10;
  animation: fadeUp 0.6s ease-out;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-brand { text-align: center; margin-bottom: 32px; }
.login-brand h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.5px; }
.login-brand .text-accent { color: var(--accent); }
.login-subtitle { color: var(--text-secondary); font-size: 0.9rem; margin-top: 4px; }
.login-logo { margin-bottom: 16px; }
.login-logo svg { margin: 0 auto; display: block; }

.auth-tabs {
  display: flex;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 28px;
}

.auth-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.auth-tab.active {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder { color: var(--text-muted); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-full { width: 100%; }

.form-error {
  margin-top: 16px;
  padding: 12px;
  background: var(--danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-sm);
  color: var(--danger);
  font-size: 0.85rem;
}

.form-success {
  margin-top: 16px;
  padding: 12px;
  background: var(--success-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-sm);
  color: var(--success);
  font-size: 0.85rem;
}

.hidden { display: none !important; }

/* Background decorations */
.login-bg-decoration { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}
.bg-orb-1 { width: 400px; height: 400px; background: var(--accent); top: -100px; right: -100px; animation-delay: 0s; }
.bg-orb-2 { width: 300px; height: 300px; background: var(--purple); bottom: -50px; left: -80px; animation-delay: 2s; }
.bg-orb-3 { width: 200px; height: 200px; background: var(--pink); top: 50%; left: 50%; animation-delay: 4s; }

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

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

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo { display: flex; align-items: center; gap: 12px; }
.sidebar-brand { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.5px; }

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.sidebar-toggle:hover { color: var(--text-primary); background: var(--bg-card); }

.sidebar-nav { flex: 1; padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-item:hover { color: var(--text-primary); background: var(--bg-card); }

.nav-item.active {
  color: white;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.1));
  border: 1px solid var(--border-hover);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-info { display: flex; align-items: center; gap: 10px; }

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: white;
}

.user-details { display: flex; flex-direction: column; }
.user-name { font-size: 0.85rem; font-weight: 600; }
.user-role { font-size: 0.75rem; color: var(--text-muted); }

.btn-logout {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-logout:hover { color: var(--danger); background: var(--danger-bg); }

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: var(--transition);
}

.topbar {
  height: var(--topbar-height);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 16px; }
.page-title { font-size: 1.5rem; font-weight: 700; }

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
}

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

.date-filter { display: flex; align-items: center; gap: 8px; }

.date-input {
  padding: 8px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
}

.date-input:focus { border-color: var(--accent); }
.date-separator { color: var(--text-muted); font-size: 0.85rem; }

.btn-filter {
  padding: 8px 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

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

.live-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--success-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 20px;
  color: var(--success);
  font-size: 0.8rem;
  font-weight: 600;
}

.live-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.content { padding: 28px 32px; }

/* ===== Cards & Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.stat-card.accent::before { background: linear-gradient(90deg, var(--accent), var(--purple)); }
.stat-card.success::before { background: linear-gradient(90deg, var(--success), #34d399); }
.stat-card.warning::before { background: linear-gradient(90deg, var(--warning), #fbbf24); }
.stat-card.danger::before { background: linear-gradient(90deg, var(--danger), #f87171); }
.stat-card.info::before { background: linear-gradient(90deg, var(--info), var(--cyan)); }
.stat-card.pink::before { background: linear-gradient(90deg, var(--pink), #f472b6); }

.stat-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.stat-label { font-size: 0.85rem; color: var(--text-secondary); font-weight: 500; }

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon.accent { background: rgba(99, 102, 241, 0.15); color: var(--accent); }
.stat-icon.success { background: var(--success-bg); color: var(--success); }
.stat-icon.warning { background: var(--warning-bg); color: var(--warning); }
.stat-icon.danger { background: var(--danger-bg); color: var(--danger); }
.stat-icon.info { background: var(--info-bg); color: var(--info); }
.stat-icon.pink { background: rgba(236, 72, 153, 0.1); color: var(--pink); }

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  letter-spacing: -1px;
  line-height: 1.2;
}

.stat-change {
  font-size: 0.8rem;
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-change.up { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ===== Chart Cards ===== */
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 28px; }
.chart-grid-full { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 28px; }

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.chart-card:hover { border-color: var(--border-hover); }
.chart-card.full { grid-column: 1 / -1; }

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.chart-title { font-size: 1.05rem; font-weight: 700; }
.chart-subtitle { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

.chart-container { position: relative; height: 300px; }
.chart-container.small { height: 250px; }

/* ===== Tables ===== */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 28px;
}

.table-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.table-title { font-size: 1.05rem; font-weight: 700; }

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

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

th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

td {
  padding: 14px 16px;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(99, 102, 241, 0.06);
  white-space: nowrap;
}

tr:hover td { background: rgba(99, 102, 241, 0.03); }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge-success { background: var(--success-bg); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.badge-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-info { background: var(--info-bg); color: var(--info); border: 1px solid rgba(59, 130, 246, 0.2); }
.badge-accent { background: rgba(99, 102, 241, 0.1); color: var(--accent); border: 1px solid rgba(99, 102, 241, 0.2); }
.badge-android { background: rgba(16, 185, 129, 0.1); color: #34d399; }
.badge-ios { background: rgba(59, 130, 246, 0.1); color: #60a5fa; }

/* Pagination */
.pagination {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
}

.pagination-info { font-size: 0.85rem; color: var(--text-secondary); }

.pagination-buttons { display: flex; gap: 8px; }

.btn-page {
  padding: 8px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-page:hover { border-color: var(--accent); color: var(--text-primary); }
.btn-page.active { background: var(--accent); color: white; border-color: var(--accent); }
.btn-page:disabled { opacity: 0.4; cursor: not-allowed; }

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-select {
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition);
}

.filter-select:focus { border-color: var(--accent); }
.filter-select option { background: var(--bg-secondary); }

.filter-input {
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
  min-width: 180px;
}

.filter-input:focus { border-color: var(--accent); }

/* Loading */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 0;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state svg { margin-bottom: 16px; opacity: 0.4; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 6px; }
.empty-state p { font-size: 0.9rem; }

/* ===== Billing section ===== */
.billing-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.billing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.billing-card .amount {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--success);
  margin-top: 8px;
}

.billing-card .label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .chart-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  .main-content { margin-left: 0; }
  .mobile-toggle { display: block; }
  .topbar { padding: 0 16px; }
  .content { padding: 20px 16px; }
  .date-filter { display: none; }
  .stat-value { font-size: 1.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .login-card { margin: 16px; padding: 32px 24px; }
  .stats-grid { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; }
}