:root {
  --bg-main: #0b0f19;
  --bg-surface: rgba(17, 24, 39, 0.7);
  --bg-surface-hover: rgba(31, 41, 55, 0.85);
  --border-glow: rgba(59, 130, 246, 0.2);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --color-emerald: #10b981;
  --color-rose: #f43f5e;
  --color-blue: #3b82f6;
  --color-violet: #8b5cf6;
  --color-amber: #f59e0b;
  --radius-xl: 20px;
  --radius-md: 12px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 10% 10%, rgba(59, 130, 246, 0.15) 0px, transparent 40%),
    radial-gradient(at 90% 90%, rgba(139, 92, 246, 0.15) 0px, transparent 40%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* App Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-blue), var(--color-violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.env-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.env-tag.native {
  background: rgba(139, 92, 246, 0.2);
  color: var(--color-violet);
  border: 1px solid rgba(139, 92, 246, 0.4);
}

.env-tag.pwa {
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-emerald);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.env-tag.web {
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-blue);
  border: 1px solid rgba(59, 130, 246, 0.4);
}

/* Glass Card */
.glass {
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: var(--transition);
}

.glass:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

/* Main Layout */
.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  width: 100%;
}

/* Auth Section */
.auth-box {
  max-width: 440px;
  margin: 80px auto;
  text-align: center;
}

.input-field {
  width: 100%;
  padding: 14px 18px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: white;
  font-size: 1rem;
  margin-bottom: 16px;
  outline: none;
  transition: var(--transition);
}

.input-field:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.3);
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--color-blue), var(--color-violet));
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
  transition: var(--transition);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: scale(1.01);
}

/* Metrics Dashboard */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.metric-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.metric-val {
  font-size: 2rem;
  font-weight: 800;
}

/* Modal Popup */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  width: 100%;
  max-width: 500px;
  animation: popIn 0.3s ease-out;
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Views toggling */
.page-view {
  display: none;
}

.page-view.active {
  display: block;
}