/* ============================================================
   Daily Attendance Tracker — Design System
   Premium glassmorphic UI with light/dark mode
   ============================================================ */

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

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* 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);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.16);
  --shadow-glow: 0 0 40px rgba(129, 140, 248, 0.15);

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-nav: 500;
  --z-modal: 1000;
  --z-toast: 1500;

  /* Chart.js Canvas */
  --chart-height: 280px;
}

/* ── Light Theme (Default) ────────────────────────────────── */
:root, [data-theme="light"] {
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f8f9fb;
  --bg-page: #f0f2f5;

  --surface: rgba(255, 255, 255, 0.85);
  --surface-hover: rgba(255, 255, 255, 0.95);
  --surface-active: rgba(255, 255, 255, 1);
  --glass: rgba(255, 255, 255, 0.6);
  --glass-strong: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.06);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #f8fafc;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.1);
  --primary-glow: rgba(99, 102, 241, 0.2);

  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  --info-light: rgba(59, 130, 246, 0.1);

  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --divider: rgba(0, 0, 0, 0.06);

  --nav-bg: rgba(255, 255, 255, 0.85);
  --input-bg: #f8f9fb;

  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-success: linear-gradient(135deg, #10b981, #06b6d4);
  --gradient-warning: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-info: linear-gradient(135deg, #3b82f6, #6366f1);
  --gradient-accent: linear-gradient(135deg, #06b6d4, #8b5cf6);
  --gradient-page: linear-gradient(180deg, #eef1f6 0%, #f0f2f5 100%);

  --skeleton-base: #e2e8f0;
  --skeleton-shine: #f1f5f9;
}

/* ── Dark Theme ───────────────────────────────────────────── */
[data-theme="dark"] {
  --bg-primary: #06070a;
  --bg-secondary: #0d0f14;
  --bg-tertiary: #141720;
  --bg-page: #06070a;

  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --surface-active: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.05);
  --glass-strong: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.08);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #475569;
  --text-inverse: #0f172a;

  --primary: #818cf8;
  --primary-hover: #6366f1;
  --primary-light: rgba(129, 140, 248, 0.12);
  --primary-glow: rgba(129, 140, 248, 0.2);

  --secondary: #a78bfa;
  --accent: #22d3ee;
  --success: #34d399;
  --success-light: rgba(52, 211, 153, 0.12);
  --warning: #fbbf24;
  --warning-light: rgba(251, 191, 36, 0.12);
  --danger: #f87171;
  --danger-light: rgba(248, 113, 113, 0.12);
  --info: #60a5fa;
  --info-light: rgba(96, 165, 250, 0.12);

  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --divider: rgba(255, 255, 255, 0.05);

  --nav-bg: rgba(13, 15, 20, 0.9);
  --input-bg: rgba(255, 255, 255, 0.05);

  --gradient-page: linear-gradient(180deg, #0a0c12 0%, #06070a 100%);

  --skeleton-base: #1e293b;
  --skeleton-shine: #334155;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.6);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.mono { font-family: var(--font-mono); }

/* ── Layout ───────────────────────────────────────────────── */
.app-container {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding: var(--space-lg);
  padding-bottom: calc(80px + var(--space-lg)); /* space for bottom nav */
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.page {
  display: none;
  animation: pageEnter 0.4s ease forwards;
}
.page.active {
  display: block;
}

.page-header {
  margin-bottom: var(--space-xl);
}
.page-header h1 {
  margin-bottom: var(--space-xs);
}
.page-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--space-md); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.w-full { width: 100%; }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ── Top Navigation ───────────────────────────────────────── */
.top-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 var(--space-lg);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition-base);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}
.nav-brand .brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 0.85rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  font-size: 1.25rem;
}
.nav-btn:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

/* Desktop nav tabs (hidden on mobile) */
.nav-tabs {
  display: none;
  gap: var(--space-xs);
}
.nav-tab {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-tab:hover { color: var(--text-primary); background: var(--surface-hover); }
.nav-tab.active {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-tab .material-symbols-rounded { font-size: 1.2rem; }

/* ── Bottom Navigation (Mobile) ───────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  height: 70px;
  padding-bottom: env(safe-area-inset-bottom, 0);
  transition: background var(--transition-base);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--text-muted);
  font-size: 0.65rem;
  font-weight: 500;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
  min-width: 56px;
}
.bottom-nav-item .material-symbols-rounded {
  font-size: 1.5rem;
  transition: all var(--transition-fast);
}
.bottom-nav-item:hover,
.bottom-nav-item.active {
  color: var(--primary);
}
.bottom-nav-item.active .material-symbols-rounded {
  transform: scale(1.1);
}
.bottom-nav-item.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--primary);
  border-radius: 0 0 var(--radius-full) var(--radius-full);
}

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card-gradient {
  position: relative;
  overflow: hidden;
}
.card-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.card-gradient.primary::before { background: var(--gradient-primary); }
.card-gradient.success::before { background: var(--gradient-success); }
.card-gradient.warning::before { background: var(--gradient-warning); }
.card-gradient.info::before { background: var(--gradient-info); }
.card-gradient.accent::before { background: var(--gradient-accent); }

/* ── Stat Cards ───────────────────────────────────────────── */
.stat-card {
  background: var(--surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.stat-card .stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: var(--space-md);
}
.stat-icon.primary { background: var(--primary-light); color: var(--primary); }
.stat-icon.success { background: var(--success-light); color: var(--success); }
.stat-icon.warning { background: var(--warning-light); color: var(--warning); }
.stat-icon.danger  { background: var(--danger-light);  color: var(--danger); }
.stat-icon.info    { background: var(--info-light);    color: var(--info); }

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
  letter-spacing: -0.03em;
}
.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Colored accent line at top of stat card */
.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}
.stat-card.primary::after { background: var(--gradient-primary); }
.stat-card.success::after { background: var(--gradient-success); }
.stat-card.warning::after { background: var(--gradient-warning); }
.stat-card.info::after { background: var(--gradient-info); }
.stat-card.accent::after { background: var(--gradient-accent); }
.stat-card.danger::after { background: linear-gradient(135deg, var(--danger), var(--warning)); }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }

/* Ripple effect container */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}
.btn-success:hover {
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  color: white;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}
.btn-danger:hover {
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.45);
  transform: translateY(-1px);
}

.btn-warning {
  background: var(--gradient-warning);
  color: white;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--border-strong);
  color: var(--text-primary);
}
.btn-outline:hover {
  background: var(--surface-hover);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-xl { padding: 18px 36px; font-size: 1.1rem; border-radius: var(--radius-xl); }
.btn-icon { width: 40px; height: 40px; padding: 0; border-radius: var(--radius-md); }

.btn:disabled, .btn.loading {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* Huge check-in / check-out buttons */
.btn-action-huge {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  flex-direction: column;
  gap: var(--space-sm);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: var(--shadow-xl);
  transition: all var(--transition-base);
}
.btn-action-huge .material-symbols-rounded {
  font-size: 2.5rem;
}
.btn-action-huge:hover {
  transform: scale(1.05);
}
.btn-action-huge:active {
  transform: scale(0.95);
}

/* ── Form Elements ────────────────────────────────────────── */
.form-group {
  margin-bottom: var(--space-lg);
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.form-input::placeholder {
  color: var(--text-muted);
}

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Toggle Switch ────────────────────────────────────────── */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--text-muted);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}
.toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-fast);
}
.toggle.active {
  background: var(--primary);
}
.toggle.active::after {
  transform: translateX(20px);
}

/* ── Status Badge ─────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.badge-present { background: var(--success-light); color: var(--success); }
.badge-absent  { background: var(--danger-light);  color: var(--danger); }
.badge-leave   { background: var(--info-light);    color: var(--info); }
.badge-half    { background: var(--warning-light); color: var(--warning); }
.badge-late    { background: rgba(249, 115, 22, 0.1); color: #f97316; }
.badge-checkedin { background: var(--primary-light); color: var(--primary); }

/* Large status display */
.status-display {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}
.status-display .status-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: 2rem;
}
.status-display .status-text {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}
.status-display .status-time {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}
.status-display .status-sub {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: var(--space-sm);
}

/* ── Progress Bar ─────────────────────────────────────────── */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--surface);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}
.progress-bar .progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}
.progress-bar .progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  animation: shimmer 2s infinite;
}
.progress-bar.success .progress-fill { background: var(--gradient-success); }
.progress-bar.warning .progress-fill { background: var(--gradient-warning); }
.progress-bar.danger .progress-fill  { background: linear-gradient(135deg, var(--danger), #dc2626); }

.progress-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.85rem;
}
.progress-info .progress-label { color: var(--text-secondary); font-weight: 500; }
.progress-info .progress-value { font-weight: 700; }

/* ── Calendar ─────────────────────────────────────────────── */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}
.calendar-header h2 {
  font-size: 1.25rem;
}
.calendar-nav {
  display: flex;
  gap: var(--space-sm);
}
.calendar-nav button {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}
.calendar-nav button:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.calendar-day-header {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-sm);
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  border: 1px solid transparent;
  gap: 2px;
}
.calendar-day:hover {
  background: var(--surface-hover);
  border-color: var(--border);
}
.calendar-day.empty {
  cursor: default;
}
.calendar-day.today {
  border-color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}
.calendar-day.present { background: var(--success-light); color: var(--success); border-color: rgba(16,185,129,0.2); }
.calendar-day.absent  { background: var(--danger-light); color: var(--danger); border-color: rgba(239,68,68,0.2); }
.calendar-day.half    { background: var(--warning-light); color: var(--warning); border-color: rgba(245,158,11,0.2); }
.calendar-day.leave   { background: var(--info-light); color: var(--info); border-color: rgba(59,130,246,0.2); }
.calendar-day.weekend { color: var(--text-muted); }

.calendar-day .day-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
}
.day-dot.present { background: var(--success); }
.day-dot.absent  { background: var(--danger); }
.day-dot.half    { background: var(--warning); }
.day-dot.leave   { background: var(--info); }

.calendar-legend {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* ── Tables ───────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
thead th {
  background: var(--surface);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  white-space: nowrap;
  border-bottom: 1px solid var(--divider);
  position: sticky;
  top: 0;
}
tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--divider);
  white-space: nowrap;
}
tbody tr {
  transition: background var(--transition-fast);
}
tbody tr:hover {
  background: var(--surface-hover);
}
tbody tr:last-child td {
  border-bottom: none;
}

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  animation: fadeIn 0.2s ease;
}
.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalEnter 0.3s var(--transition-spring);
  box-shadow: var(--shadow-xl);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}
.modal-header h3 {
  font-size: 1.15rem;
}
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}
.modal-close:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.modal-body { margin-bottom: var(--space-lg); }
.modal-footer { display: flex; justify-content: flex-end; gap: var(--space-sm); }

/* ── Toast Notifications ──────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 80px;
  right: var(--space-lg);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.4s var(--transition-spring);
  pointer-events: auto;
  max-width: 380px;
  font-size: 0.9rem;
  font-weight: 500;
}
.toast.leaving {
  animation: toastOut 0.3s ease forwards;
}

.toast-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}
.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon   { color: var(--danger); }
.toast.warning .toast-icon { color: var(--warning); }
.toast.info .toast-icon    { color: var(--info); }

.toast.success { border-left: 3px solid var(--success); }
.toast.error   { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info    { border-left: 3px solid var(--info); }

/* ── Skeleton Loaders ─────────────────────────────────────── */
.skeleton {
  background: var(--skeleton-base);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}
.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    transparent,
    var(--skeleton-shine),
    transparent
  );
  animation: shimmer 1.5s infinite;
}
.skeleton-text { height: 14px; margin-bottom: 8px; }
.skeleton-text:last-child { width: 60%; }
.skeleton-heading { height: 24px; width: 40%; margin-bottom: 16px; }
.skeleton-card { height: 120px; }
.skeleton-circle { width: 44px; height: 44px; border-radius: 50%; }

/* ── Empty States ─────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}
.empty-state .empty-icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
  opacity: 0.4;
}
.empty-state h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}
.empty-state p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-lg);
}

/* ── Charts ───────────────────────────────────────────────── */
.chart-container {
  position: relative;
  height: var(--chart-height);
  width: 100%;
}
.chart-container canvas {
  max-height: 100%;
}

/* ── Live Clock ───────────────────────────────────────────── */
.live-clock {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.live-clock-date {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: var(--space-sm);
}

/* Welcome banner */
.welcome-banner {
  background: var(--surface);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  position: relative;
  overflow: hidden;
}
.welcome-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--primary-glow), transparent 70%);
  pointer-events: none;
}
.welcome-info h1 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}
.welcome-info p {
  color: var(--text-secondary);
}

/* ── Attendance Action Area ───────────────────────────────── */
.attendance-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
}

.action-buttons {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Quick Actions Row ────────────────────────────────────── */
.quick-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}

/* ── History List ─────────────────────────────────────────── */
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--divider);
}
.history-item:last-child { border-bottom: none; }
.history-item .history-date {
  font-weight: 600;
  font-size: 0.9rem;
}
.history-item .history-day {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.history-item .history-time {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ── Report Section ───────────────────────────────────────── */
.report-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.report-controls {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

/* ── Settings Sections ────────────────────────────────────── */
.settings-section {
  margin-bottom: var(--space-xl);
}
.settings-section h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--divider);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
}
.connection-status.connected {
  background: var(--success-light);
  color: var(--success);
}
.connection-status.disconnected {
  background: var(--danger-light);
  color: var(--danger);
}
.connection-status.testing {
  background: var(--warning-light);
  color: var(--warning);
}

/* ── Keyframe Animations ──────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes modalEnter {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(100%) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateX(100%) scale(0.9);
  }
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.05); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ── Responsive ───────────────────────────────────────────── */

/* Tablets */
@media (min-width: 768px) {
  .main-content {
    padding: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .bottom-nav { display: none; }

  .nav-tabs { display: flex; }

  .grid-2-md { grid-template-columns: repeat(2, 1fr); }
  .grid-3-md { grid-template-columns: repeat(3, 1fr); }

  .live-clock { font-size: 4rem; }

  .btn-action-huge {
    width: 200px;
    height: 200px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .main-content {
    padding: var(--space-2xl);
  }

  .grid-4-lg { grid-template-columns: repeat(4, 1fr); }

  .calendar-day {
    font-size: 0.95rem;
  }

  .toast-container {
    top: 80px;
    right: var(--space-xl);
  }
}

/* Large Desktop */
@media (min-width: 1200px) {
  .main-content {
    max-width: 1280px;
  }
}

/* Mobile small */
@media (max-width: 480px) {
  .main-content {
    padding: var(--space-md);
    padding-bottom: calc(80px + var(--space-md));
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }

  .stat-card .stat-value { font-size: 1.5rem; }

  .welcome-banner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .btn-action-huge {
    width: 150px;
    height: 150px;
    font-size: 0.85rem;
  }
  .btn-action-huge .material-symbols-rounded {
    font-size: 2rem;
  }

  .live-clock { font-size: 2.5rem; }

  .grid-auto {
    grid-template-columns: repeat(2, 1fr);
  }

  .toast-container {
    top: auto;
    bottom: 80px;
    right: var(--space-md);
    left: var(--space-md);
  }
  .toast { max-width: 100%; }

  .calendar-day { font-size: 0.8rem; }

  .report-header {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ── Print Styles ─────────────────────────────────────────── */
@media print {
  .top-nav, .bottom-nav, .toast-container,
  .btn, .nav-btn, .calendar-nav, .report-controls { display: none !important; }

  body {
    background: white;
    color: black;
  }

  .card, .stat-card {
    border: 1px solid #ddd;
    box-shadow: none;
    backdrop-filter: none;
    break-inside: avoid;
  }

  .main-content {
    padding: 0;
    max-width: 100%;
  }

  table { font-size: 0.8rem; }
  thead th { background: #f0f0f0 !important; color: #333 !important; }
}

/* ── Utility: Hidden ──────────────────────────────────────── */
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}