/* ═══════════════════════════════════════════════════════════════
   DENDEN AIR — Design System
   Premium Dark-Mode SMS & OTP Tracking Dashboard
   ═══════════════════════════════════════════════════════════════ */

/* ─── Google Fonts Import ───────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ─── CSS Custom Properties (Design Tokens) ─────────────────── */
:root {
  /* Background Layers */
  --bg-primary: #050810;
  --bg-secondary: #0a0f1e;
  --bg-tertiary: #111827;
  --bg-card: rgba(17, 24, 39, 0.65);
  --bg-card-hover: rgba(22, 33, 62, 0.75);
  --bg-glass: rgba(15, 23, 42, 0.55);
  --bg-input: rgba(15, 23, 42, 0.8);

  /* Accent Colors */
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.3);
  --accent-cyan-soft: rgba(6, 182, 212, 0.15);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.3);
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-rose: #f43f5e;
  --accent-rose-glow: rgba(244, 63, 94, 0.25);
  --accent-amber: #f59e0b;

  /* Text Colors */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #22d3ee;

  /* Borders */
  --border-subtle: rgba(148, 163, 184, 0.08);
  --border-accent: rgba(6, 182, 212, 0.25);
  --border-glow: rgba(6, 182, 212, 0.5);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.15), 0 0 60px rgba(6, 182, 212, 0.05);
  --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.15);

  /* Spacing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ─── Animated Background ───────────────────────────────────── */
.bg-animated {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-animated::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 20% 50%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(16, 185, 129, 0.04) 0%, transparent 50%);
  animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(-2%, 1%) rotate(1deg); }
  66% { transform: translate(1%, -2%) rotate(-1deg); }
  100% { transform: translate(-1%, 2%) rotate(0.5deg); }
}

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ─── Layout Containers ─────────────────────────────────────── */
.app-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.auth-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

/* ─── Glassmorphic Card ─────────────────────────────────────── */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
}

.glass-card-static {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ─── Auth Form Styles ──────────────────────────────────────── */
.auth-card {
  width: 100%;
  max-width: 440px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-emerald));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.auth-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-logo .subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  font-weight: 400;
  letter-spacing: 0.04em;
}

/* Tab Switch */
.auth-tabs {
  display: flex;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 1.75rem;
  border: 1px solid var(--border-subtle);
}

.auth-tab {
  flex: 1;
  padding: 0.6rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
}

.auth-tab.active {
  background: var(--bg-card);
  color: var(--text-accent);
  box-shadow: var(--shadow-sm);
}

.auth-tab:hover:not(.active) {
  color: var(--text-secondary);
}

/* Form Elements */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--accent-cyan), #0891b2);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-cyan-glow);
}

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

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.2);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.78rem;
}

/* Error / Success Messages */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 1rem;
  animation: fadeSlideIn 0.3s ease-out;
  display: none;
}

.alert.show {
  display: block;
}

.alert-error {
  background: var(--accent-rose-glow);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
}

.alert-success {
  background: var(--accent-emerald-glow);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

/* ─── Dashboard Layout ──────────────────────────────────────── */
.dashboard {
  display: grid;
  grid-template-columns: 280px 1fr;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

/* Header */
.header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.header-brand .logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.header-brand h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.connected {
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald-glow);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot.disconnected {
  background: var(--accent-rose);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.8rem;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
}

.user-email {
  font-size: 0.8rem;
  color: var(--text-secondary);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-logout {
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
  background: rgba(244, 63, 94, 0.1);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.15);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-body);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-logout:hover {
  background: rgba(244, 63, 94, 0.2);
}

/* Sidebar */
.sidebar {
  padding: 1.25rem;
  border-right: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sidebar-section {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.sidebar-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Stats */
.stat-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.stat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-accent);
}

/* Device List */
.device-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.device-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.65rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.device-item:hover {
  border-color: var(--border-accent);
}

.device-name {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.device-icon {
  font-size: 1rem;
}

.device-delete {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.2rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.device-delete:hover {
  color: var(--accent-rose);
  background: rgba(244, 63, 94, 0.1);
}

.empty-state {
  text-align: center;
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.empty-state .empty-icon {
  font-size: 1.5rem;
  margin-bottom: 0.4rem;
  display: block;
}

/* ─── Main Content ──────────────────────────────────────────── */
.main-content {
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Stats Bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.stats-card {
  padding: 1.15rem;
  position: relative;
  overflow: hidden;
}

.stats-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  opacity: 0.08;
}

.stats-card.cyan::after {
  background: var(--accent-cyan);
  box-shadow: 0 0 40px var(--accent-cyan);
}

.stats-card.purple::after {
  background: var(--accent-purple);
  box-shadow: 0 0 40px var(--accent-purple);
}

.stats-card.emerald::after {
  background: var(--accent-emerald);
  box-shadow: 0 0 40px var(--accent-emerald);
}

.stats-card .stats-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.stats-card .stats-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stats-card .stats-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ─── SMS Feed ──────────────────────────────────────────────── */
.feed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.feed-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feed-badge {
  background: var(--accent-cyan);
  color: #000;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 100px;
  animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.sms-feed {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
  overflow-y: auto;
}

.sms-card {
  padding: 1rem 1.25rem;
  animation: fadeSlideIn 0.4s ease-out;
  cursor: default;
  position: relative;
}

.sms-card.new-entry {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.sms-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.sms-sender {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sender-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
}

.sender-name {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.sms-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ─── Privacy Blur (Workplace Safety) ───────────────────────── */
.sms-message {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
  padding: 0.7rem 0.85rem;
  background: rgba(15, 23, 42, 0.5);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  filter: blur(6px);
  transition: filter 0.3s ease;
  user-select: none;
  position: relative;
}

.sms-message:hover {
  filter: blur(0px);
  user-select: auto;
}

.sms-message::after {
  content: '🔒 Hover to reveal';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--text-muted);
  filter: blur(0);
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.sms-message:hover::after {
  opacity: 0;
}

/* ─── Toast Notification ────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.15rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
  animation: toastSlide 0.4s ease-out;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 300px;
  max-width: 420px;
}

.toast-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toast-body {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.2rem;
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: var(--text-primary);
}

@keyframes toastSlide {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ─── QR Panel ──────────────────────────────────────────────── */
.qr-section {
  text-align: center;
}

.qr-canvas-wrapper {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: inline-block;
  margin: 0.5rem 0;
}

.qr-canvas-wrapper canvas {
  display: block;
}

.qr-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

.qr-timer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-amber);
  margin-top: 0.25rem;
}

/* ─── Loading Spinner ───────────────────────────────────────── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 8, 16, 0.85);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
}

.loading-overlay.hidden {
  display: none;
}

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

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ─── Responsive Breakpoints ────────────────────────────────── */
@media (max-width: 768px) {
  .dashboard {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }

  .sidebar.open {
    display: flex;
  }

  .header {
    padding: 0.75rem 1rem;
  }

  .user-email {
    display: none;
  }

  .stats-bar {
    grid-template-columns: 1fr;
  }

  .main-content {
    padding: 1rem;
  }

  .toast {
    min-width: unset;
    max-width: calc(100vw - 2rem);
  }
}

@media (max-width: 480px) {
  .auth-card {
    padding: 1.5rem;
  }

  .header-brand h1 {
    font-size: 1rem;
  }

  .connection-status span:last-child {
    display: none;
  }
}

/* ─── Utilities ─────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-mono {
  font-family: var(--font-mono);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }