/* ═══════════════════════════════════════════════════════════
   ClockIn — Design System
   Premium office attendance system with dark mode glass UI
   ═══════════════════════════════════════════════════════════ */

:root {
  /* Color Palette */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.08);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.15);
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-active: rgba(59, 130, 246, 0.5);
  
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
  --shadow-glow-blue: 0 0 40px rgba(59, 130, 246, 0.15);
  --shadow-glow-green: 0 0 60px rgba(16, 185, 129, 0.2);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html, body, #root {
  height: 100%;
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-primary);
  background-image: 
    radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(16, 185, 129, 0.04) 0%, transparent 50%);
  background-attachment: fixed;
}

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

.main-content {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  width: 100%;
}

/* === Glass Card === */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* === Navbar === */
.navbar {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.navbar-brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.navbar-brand-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.navbar-user {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-glass);
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-secondary);
}

.navbar-user-avatar {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-blue));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: white;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-blue-hover));
  color: white;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, var(--accent-emerald), #059669);
  color: white;
  box-shadow: 0 2px 12px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--accent-red), #dc2626);
  color: white;
}

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

.btn-ghost:hover {
  background: var(--bg-glass-hover);
  color: var(--text-primary);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: 10px;
  border-radius: var(--radius-md);
}

/* === Clock-In Button (Hero) === */
.clockin-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.clockin-button {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 3px solid var(--accent-emerald);
  background: radial-gradient(circle at 30% 30%, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-glow-green), inset 0 0 40px rgba(16, 185, 129, 0.05);
  position: relative;
}

.clockin-button::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid rgba(16, 185, 129, 0.15);
  animation: clockin-pulse 3s ease-in-out infinite;
}

.clockin-button:hover {
  transform: scale(1.05);
  box-shadow: 0 0 80px rgba(16, 185, 129, 0.3);
  border-color: #34d399;
}

.clockin-button:active {
  transform: scale(0.95);
}

.clockin-button.checked-in {
  border-color: var(--accent-amber);
  box-shadow: 0 0 60px rgba(245, 158, 11, 0.2);
  background: radial-gradient(circle at 30% 30%, rgba(245, 158, 11, 0.15), rgba(245, 158, 11, 0.05));
}

.clockin-button.checked-in::before {
  border-color: rgba(245, 158, 11, 0.15);
}

.clockin-time {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent-emerald);
}

.clockin-button.checked-in .clockin-time {
  color: var(--accent-amber);
}

.clockin-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 4px;
}

@keyframes clockin-pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.08); opacity: 0; }
}

/* === Stats Grid === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.stat-card {
  padding: 20px;
}

.stat-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.stat-sub {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* === Status Badge === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-info {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* === Table === */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.data-table td {
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

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

.data-table tr:hover td {
  background: var(--bg-glass);
}

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

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

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

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

.form-input:focus {
  border-color: var(--border-active);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* === Sidebar / Tab Nav === */
.tab-nav {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin-bottom: 24px;
  overflow-x: auto;
}

.tab-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  border: none;
  background: transparent;
  font-family: var(--font-family);
}

.tab-nav-item:hover {
  color: var(--text-secondary);
  background: var(--bg-glass);
}

.tab-nav-item.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* === Animations === */
.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

.slide-up {
  animation: slideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Loading Spinner === */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* === Toast === */
.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-card);
  animation: slideInRight 0.3s ease;
  min-width: 280px;
}

.toast-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
}

.toast-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--accent-red);
}

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

/* === Responsive === */
@media (max-width: 768px) {
  .main-content {
    padding: 16px;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .clockin-button {
    width: 160px;
    height: 160px;
  }
  
  .clockin-time {
    font-size: 26px;
  }
  
  .tab-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
  animation: fadeIn 0.2s ease-out;
}

.modal-content {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  padding: 24px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.input-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.input-field {
  width: 100%;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

.input-field:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}