/* ====================================================
   TimeTracker Pro — Premium Dark Theme Stylesheet
   ==================================================== */

/* ===== CSS CUSTOM PROPERTIES (Design Tokens) ===== */
:root {
  /* Backgrounds */
  --bg-primary: #0b1120;
  --bg-secondary: #111827;
  --bg-card: #1e293b;
  --bg-card-hover: #253348;
  --bg-input: #1a2332;
  --bg-modal-overlay: rgba(0, 0, 0, 0.6);

  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-primary-hover: #818cf8;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --accent-glow: 0 0 20px rgba(99, 102, 241, 0.3);

  /* Semantic Colors */
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.12);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.12);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.12);
  --color-info: #3b82f6;
  --color-info-bg: rgba(59, 130, 246, 0.12);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  /* Borders */
  --border-color: rgba(148, 163, 184, 0.12);
  --border-color-hover: rgba(148, 163, 184, 0.25);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);

  /* Sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed: 70px;

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

  /* Font */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-primary-hover);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

input, select, textarea {
  font-family: inherit;
  outline: none;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

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

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

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

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 5px rgba(16, 185, 129, 0.3); }
  50% { box-shadow: 0 0 20px rgba(16, 185, 129, 0.6); }
}

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

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

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

@keyframes toastSlideIn {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastSlideOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(120%); opacity: 0; }
}

.animate-fade-in { animation: fadeIn 0.4s ease forwards; }
.animate-fade-in-up { animation: fadeInUp 0.5s ease forwards; }
.animate-slide-in-left { animation: slideInLeft 0.4s ease forwards; }
.animate-scale-in { animation: scaleIn 0.3s ease forwards; }

/* Staggered animation delays - no opacity override to avoid disappearing elements */
.delay-1 { animation-delay: 0.05s; }
.delay-2 { animation-delay: 0.1s; }
.delay-3 { animation-delay: 0.15s; }
.delay-4 { animation-delay: 0.2s; }
.delay-5 { animation-delay: 0.25s; }

/* ===== LAYOUT ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 24px 32px;
  transition: margin-left var(--transition-normal);
  min-height: 100vh;
}

@media (max-width: 768px) {
  .main-content {
    margin-left: 0;
    padding: 16px;
    padding-top: 70px;
  }
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.sidebar-header {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.sidebar-logo h1 {
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.sidebar-logo span {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  font-weight: 400;
  -webkit-text-fill-color: var(--text-muted);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
}

.nav-section-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 16px 12px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
  margin-bottom: 2px;
  position: relative;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent-gradient);
  border-radius: 0 3px 3px 0;
}

.nav-item i {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border-color);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: var(--radius-md);
}

.sidebar-user-avatar {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: white;
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: capitalize;
}

.sidebar-logout {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}

.sidebar-logout:hover {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

/* Mobile sidebar toggle */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  
  .mobile-toggle.hidden {
    display: none !important;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-modal-overlay);
    z-index: 99;
  }

  .sidebar-overlay.open {
    display: block;
  }
}

/* ===== PAGE HEADER ===== */
.page-header {
  margin-bottom: 24px;
  animation: fadeIn 0.4s ease;
}

.page-header h2 {
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.page-header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--border-color-hover);
}

.card-glass {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  animation: fadeInUp 0.5s ease forwards;
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.stat-card-icon.purple { background: rgba(99, 102, 241, 0.12); color: var(--accent-primary); }
.stat-card-icon.green { background: var(--color-success-bg); color: var(--color-success); }
.stat-card-icon.amber { background: var(--color-warning-bg); color: var(--color-warning); }
.stat-card-icon.blue { background: var(--color-info-bg); color: var(--color-info); }
.stat-card-icon.red { background: var(--color-danger-bg); color: var(--color-danger); }

.stat-card-value {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.stat-card-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== TIMER WIDGET ===== */
.timer-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 28px;
  text-align: center;
  margin-bottom: 24px;
  animation: fadeInUp 0.5s ease;
  position: relative;
  overflow: hidden;
}

.timer-widget::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0.6;
}

.timer-widget.active {
  border-color: rgba(16, 185, 129, 0.3);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.08);
}

.timer-widget.active::before {
  background: linear-gradient(135deg, #10b981, #34d399);
  opacity: 1;
}

.timer-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
}

.timer-status-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--text-muted);
}

.timer-status-dot.active {
  background: var(--color-success);
  animation: pulseGlow 2s ease-in-out infinite;
}

.timer-status-text {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.timer-display {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  margin: 12px 0;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.timer-widget.active .timer-display {
  background: linear-gradient(135deg, #10b981, #34d399);
  -webkit-background-clip: text;
  background-clip: text;
  animation: timerPulse 3s ease-in-out infinite;
}

.timer-task-info {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.timer-task-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 500;
}

.timer-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
}

.timer-select {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  min-width: 180px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}

.btn-success:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.4);
  transform: translateY(-1px);
}

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

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-icon.sm {
  width: 30px;
  height: 30px;
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

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

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.form-error {
  font-size: 0.78rem;
  color: var(--color-danger);
  margin-top: 4px;
}

/* ===== AUTH PAGES ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.auth-page::after {
  content: '';
  position: absolute;
  bottom: -40%;
  right: -20%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 36px;
  position: relative;
  z-index: 1;
  animation: scaleIn 0.4s ease;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}

.auth-logo-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.auth-logo h1 {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-title {
  font-size: 1.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 24px;
}

.auth-form .btn {
  width: 100%;
  margin-top: 8px;
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.auth-footer a {
  color: var(--accent-primary);
  font-weight: 600;
}

.auth-error {
  background: var(--color-danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--color-danger);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  margin-bottom: 16px;
  animation: slideDown 0.3s ease;
}

/* ===== TABLES ===== */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.table th {
  background: var(--bg-secondary);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
  vertical-align: middle;
}

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

.table tr:hover td {
  background: rgba(99, 102, 241, 0.04);
}

.table-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.table-empty i {
  margin-bottom: 12px;
  opacity: 0.5;
}

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.badge-purple {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-primary);
}

/* ===== TASK CARDS ===== */
.task-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: all var(--transition-normal);
  animation: fadeIn 0.3s ease;
}

.task-card:hover {
  border-color: var(--border-color-hover);
  background: var(--bg-card-hover);
}

.task-card.completed {
  opacity: 0.65;
}

.task-checkbox {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  margin-top: 2px;
  background: transparent;
  color: transparent;
}

.task-checkbox:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

.task-checkbox.checked {
  background: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

.task-body {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text-primary);
}

.task-card.completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-description {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.task-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.task-meta-item.overdue {
  color: var(--color-danger);
}

.task-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.task-card:hover .task-actions {
  opacity: 1;
}

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-modal-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  animation: scaleIn 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
}

.modal-close:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
}

/* ===== CHART ===== */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 160px;
  padding-top: 20px;
}

.chart-bar-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}

.chart-bar {
  width: 100%;
  max-width: 40px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  min-height: 4px;
  transition: all var(--transition-slow);
  position: relative;
}

.chart-bar:hover {
  filter: brightness(1.2);
}

.chart-bar-value {
  position: absolute;
  top: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.chart-bar-label {
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.chart-bar.today .chart-bar {
  background: linear-gradient(135deg, #10b981, #34d399);
}

/* ===== FILTERS BAR ===== */
.filters-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.filter-group label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.filter-input {
  padding: 7px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.84rem;
}

.filter-input:focus {
  border-color: var(--accent-primary);
}

/* ===== TOAST NOTIFICATIONS ===== */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 280px;
  max-width: 400px;
  animation: toastSlideIn 0.4s ease;
  font-size: 0.88rem;
}

.toast.removing {
  animation: toastSlideOut 0.3s ease forwards;
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

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

/* ===== LOADING ===== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.loading-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  flex-direction: column;
  gap: 16px;
}

.loading-page .spinner {
  width: 36px;
  height: 36px;
  border-width: 3px;
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 20px;
}

.pagination button {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.pagination button.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: white;
}

.pagination button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ===== GRID LAYOUTS ===== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  
  /* Mobile UI improvements */
  .timer-display { font-size: 2.2rem; margin: 8px 0; }
  .timer-widget { padding: 20px; border-radius: var(--radius-lg); }
  .timer-controls { flex-direction: column; width: 100%; gap: 8px; }
  .timer-controls .btn, .timer-controls .timer-select { width: 100%; min-width: 0; }
  
  .page-header-actions { flex-direction: column; align-items: stretch; }
  .page-header-actions .btn { width: 100%; }

  /* Always show task actions on mobile since there is no hover */
  .task-actions { opacity: 1; }
  
  .modal-overlay { padding: 12px; }
  .modal { margin: 0; width: 100%; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .user-stats { flex-direction: column; gap: 8px; align-items: flex-start; }
  .user-stat { text-align: left; display: flex; align-items: center; justify-content: space-between; width: 100%; }
  .toast { min-width: 0; width: 100%; max-width: 100%; }
  #toast-container { right: 10px; left: 10px; top: 10px; }
}

/* ===== MISC ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.empty-state-icon {
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.empty-state p {
  font-size: 0.88rem;
  max-width: 360px;
  margin: 0 auto 20px;
}

/* confirm dialog */
.confirm-message {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: center;
  padding: 8px 0;
}

/* Admin user list card */
.user-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.user-card:hover {
  border-color: var(--border-color-hover);
}

.user-avatar-lg {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: white;
  flex-shrink: 0;
}

.user-info { flex: 1; min-width: 0; }
.user-info h4 { font-size: 0.92rem; font-weight: 600; }
.user-info p { font-size: 0.8rem; color: var(--text-muted); }

.user-stats {
  display: flex;
  gap: 16px;
}

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

.user-stat-value {
  font-size: 1.1rem;
  font-weight: 700;
}

.user-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: 20px;
  width: fit-content;
}

.tab {
  padding: 8px 16px;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
}

.tab:hover {
  color: var(--text-secondary);
}

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

/* Due soon section on dashboard */
.due-soon-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.due-soon-item:last-child {
  border-bottom: none;
}

.due-soon-title {
  font-size: 0.88rem;
  font-weight: 500;
}

.due-soon-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.due-soon-date.overdue {
  color: var(--color-danger);
  font-weight: 600;
}

/* ===== PRINT STYLES ===== */
@media print {
  /* Hide non-essential UI elements */
  .sidebar, .mobile-toggle, .no-print, #toast-container {
    display: none !important;
  }
  
  /* Expand main content area */
  .main-content {
    margin: 0 !important;
    padding: 0 !important;
  }

  /* Force background colors and exact styles */
  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }
  
  /* Clean print background */
  body {
    background: white !important;
    color: black !important;
  }
  
  .print-container {
    box-shadow: none !important;
    border: none !important;
  }
}