:root {
  --bg-color: #1A1C1E;
  --surface-color: #25282D;
  --surface-hover: #2E3238;
  --accent-color: #BDC7DC;
  --accent-hover: #D4DEF2;
  --text-color: #FFFFFF;
  --text-muted: rgba(255, 255, 255, 0.4);
  --border-color: rgba(255, 255, 255, 0.1);
  --font-main: 'Google Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --success-color: #4CAF50;
  --warning-color: #FFC107;
  --danger-color: #FF5252;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  overflow-x: hidden;
}

/* Animations */
@keyframes fadeInPage {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(76, 175, 80, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(76, 175, 80, 0); }
}

/* Page Views */
.view-page {
  display: none;
  width: 100%;
  min-height: 100vh;
  animation: fadeInPage 0.5s var(--ease-out) forwards;
}

.view-page.active {
  display: flex;
  flex-direction: column;
}

/* Loader Overlay */
.loader-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(26, 28, 30, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out);
}

.loader-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(189, 199, 220, 0.2);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.hidden {
  display: none !important;
}

/* 1. Login View */
#view-login {
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 36px 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  stroke: var(--accent-color);
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-color);
}

.auth-title {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 6px;
}

.auth-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.input-group label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.input-field {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 14px 16px;
  color: var(--text-color);
  font-family: var(--font-main);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s, background-color 0.2s;
}

.input-field:focus {
  border-color: var(--accent-color);
  background-color: rgba(255, 255, 255, 0.06);
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 16px 24px;
  border-radius: 100px;
  font-weight: 700;
  font-family: var(--font-main);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  width: 100%;
  border: 1px solid transparent;
  transition: all 0.3s var(--ease-out);
}

.button-primary {
  background-color: var(--accent-color);
  color: var(--bg-color);
  border-color: var(--accent-color);
}

.button-primary:hover {
  background-color: transparent;
  color: var(--accent-color);
}

.error-banner {
  background-color: rgba(255, 82, 82, 0.15);
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
  border-radius: 12px;
  padding: 12px;
  font-size: 13px;
  margin-bottom: 20px;
  text-align: center;
}

/* 2. Dashboard Layout */
.header {
  width: 100%;
  padding: 20px 32px;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
}

.brand-domain {
  font-size: 12px;
  color: var(--text-muted);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 24px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

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

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

.action-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--accent-color);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  border-color: var(--accent-color);
  background: rgba(255, 255, 255, 0.08);
}

.button-small {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.button-small:hover {
  border-color: var(--accent-color);
  color: var(--text-color);
}

/* Dashboard Content */
.dashboard-content {
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Info Notice */
.info-notice {
  background-color: rgba(189, 199, 220, 0.06);
  border: 1px solid rgba(189, 199, 220, 0.2);
  border-radius: 16px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--accent-color);
}

/* KPI Cards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.kpi-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.2s, border-color 0.2s;
}

.kpi-card:hover {
  border-color: rgba(189, 199, 220, 0.3);
  transform: translateY(-2px);
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kpi-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.kpi-badge {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 100px;
  font-weight: 700;
}

.badge-success {
  background: rgba(76, 175, 80, 0.15);
  color: var(--success-color);
}

.badge-accent {
  background: rgba(189, 199, 220, 0.15);
  color: var(--accent-color);
}

.kpi-icon {
  font-size: 16px;
  color: var(--accent-color);
}

.kpi-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-color);
}

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

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

@media (max-width: 1024px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
}

.chart-title {
  font-size: 20px;
  font-weight: 500;
}

.chart-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.range-selector {
  display: flex;
  background-color: rgba(255, 255, 255, 0.04);
  padding: 4px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  gap: 4px;
}

.range-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.range-btn.active, .range-btn:hover {
  background-color: var(--accent-color);
  color: var(--bg-color);
}

.chart-wrapper {
  position: relative;
  width: 100%;
  height: 320px;
}

.plans-legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.plan-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background-color: rgba(255, 255, 255, 0.02);
  border-radius: 10px;
  font-size: 13px;
}

.plan-name {
  color: var(--text-muted);
}

.plan-count {
  font-weight: 700;
  color: var(--text-color);
}