:root {
  --bg-primary: #0a0f24;
  --bg-gradient: linear-gradient(135deg, #070b1a 0%, #0e1630 50%, #090e21 100%);
  --card-bg: rgba(20, 29, 58, 0.75);
  --card-border: rgba(0, 242, 254, 0.15);
  --card-hover-border: rgba(0, 242, 254, 0.35);
  --text-primary: #f0f6fc;
  --text-secondary: #8b9bb4;
  --text-muted: #57657e;
  --accent-cyan: #00f2fe;
  --accent-cyan-dim: rgba(0, 242, 254, 0.12);
  --accent-cyan-hover: #4facfe;
  --accent-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --accent-gradient-hover: linear-gradient(135deg, #38f9d7 0%, #4facfe 100%);
  --danger: #ff5252;
  --danger-dim: rgba(255, 82, 82, 0.15);
  --success: #00e676;
  --success-dim: rgba(0, 230, 118, 0.15);
  --input-bg: rgba(13, 20, 42, 0.85);
  --input-border: rgba(0, 242, 254, 0.2);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.4);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

[data-theme='light'] {
  --bg-primary: #f4f7fb;
  --bg-gradient: linear-gradient(135deg, #eef2f8 0%, #f7f9fc 50%, #e8eef6 100%);
  --card-bg: rgba(255, 255, 255, 0.9);
  --card-border: rgba(0, 150, 180, 0.15);
  --card-hover-border: rgba(0, 150, 180, 0.3);
  --text-primary: #0a1128;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --accent-cyan: #0088a3;
  --accent-cyan-dim: rgba(0, 136, 163, 0.1);
  --accent-cyan-hover: #006d82;
  --accent-gradient: linear-gradient(135deg, #0088a3 0%, #00b4d8 100%);
  --accent-gradient-hover: linear-gradient(135deg, #007791 0%, #0096c7 100%);
  --input-bg: #ffffff;
  --input-border: rgba(0, 136, 163, 0.25);
  --shadow-lg: 0 16px 36px rgba(10, 17, 40, 0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease, color 0.3s ease;
  line-height: 1.5;
}

/* Header */
.app-header {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 36, 0.6);
}

[data-theme='light'] .app-header {
  background: rgba(244, 247, 251, 0.8);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-badge {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  color: #050b1a;
  box-shadow: 0 0 18px rgba(0, 242, 254, 0.4);
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.4px;
}

.brand-pill {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  font-weight: 600;
  border: 1px solid var(--card-border);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.control-btn, .lang-select {
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0 12px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.control-btn:hover, .lang-select:hover {
  border-color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
}

.lang-select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300f2fe' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 14px;
  padding-right: 28px;
}

/* Container */
.main-content {
  flex: 1;
  max-width: 1040px;
  width: 100%;
  margin: 0 auto;
  padding: 36px 20px 60px;
}

/* Glass Card */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
  transition: border-color 0.2s ease;
}

.glass-card:hover {
  border-color: var(--card-hover-border);
}

/* Sign-In View */
.auth-wrapper {
  max-width: 440px;
  margin: 40px auto 0;
}

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.auth-title {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.4px;
}

.auth-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Auth Tabs */
.auth-tabs {
  display: flex;
  background: rgba(10, 15, 36, 0.4);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 24px;
}

.auth-tab {
  flex: 1;
  padding: 10px 0;
  text-align: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.auth-tab.active {
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  height: 48px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  padding: 0 16px;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 242, 254, 0.2);
}

.form-input.code-input {
  letter-spacing: 8px;
  font-size: 22px;
  text-align: center;
  font-weight: 700;
}

.btn-primary {
  width: 100%;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient);
  color: #050b1a;
  border: none;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-gradient-hover);
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.5);
  transform: translateY(-1px);
}

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

.btn-secondary {
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
}

.btn-danger-outline {
  height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-danger-outline:hover {
  background: var(--danger-dim);
}

/* Info Box & Alerts */
.info-box {
  background: var(--accent-cyan-dim);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.alert-error {
  background: var(--danger-dim);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
}

/* QR Tab */
.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 10px 0;
}

.qr-canvas-box {
  background: #ffffff;
  padding: 16px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  margin-bottom: 18px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

#qrCanvas {
  display: block;
}

.qr-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  margin-bottom: 16px;
}

.qr-instructions {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 320px;
}

/* Dashboard */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.user-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.user-meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-avatar {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
  color: #050b1a;
}

.user-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 2px;
}

.user-handle {
  font-size: 14px;
  color: var(--text-secondary);
}

.cards-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.stat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.stat-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
}

.stat-badge {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  border: 1px solid var(--card-border);
}

.stat-value {
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.stat-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* Usage Chart */
.chart-card {
  padding: 24px 28px;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}

.dot-calls {
  background: #00f2fe;
}

.dot-voice {
  background: #a855f7;
}

.chart-container {
  width: 100%;
  height: 240px;
  position: relative;
}

.chart-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* Table */
.table-card {
  padding: 24px 28px;
}

.table-header {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.purchases-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.purchases-table th {
  text-align: left;
  padding: 12px 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--card-border);
}

.purchases-table td {
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

[data-theme='light'] .purchases-table td {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.purchases-table tr:last-child td {
  border-bottom: none;
}

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
}

.status-active {
  background: var(--success-dim);
  color: var(--success);
}

.status-revoked {
  background: var(--danger-dim);
  color: var(--danger);
}

.empty-state {
  text-align: center;
  padding: 36px 0;
  color: var(--text-muted);
  font-size: 14px;
}

/* Dashboard Footer */
.dashboard-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* Responsive */
@media (max-width: 640px) {
  .app-header {
    padding: 0 16px;
  }
  .main-content {
    padding: 20px 14px 40px;
  }
  .glass-card {
    padding: 20px;
  }
  .user-banner {
    flex-direction: column;
    align-items: flex-start;
  }
  .dashboard-actions {
    flex-direction: column;
    width: 100%;
  }
  .dashboard-actions button {
    width: 100%;
  }
}

.hidden {
  display: none !important;
}