/* ============================================
   Time Tracker - Complete CSS Stylesheet
   ============================================ */

/* --- CSS Variables --- */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #e0e7ff;
  --secondary: #6b7280;
  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --info: #3b82f6;
  --info-light: #dbeafe;
  --dark: #1f2937;
  --gray-900: #111827;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  --transition: all 0.2s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--gray-800);
  background: var(--gray-100);
  line-height: 1.6;
  min-height: 100vh;
}

/* --- Login Page --- */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 2rem;
}

.login-box {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 3rem;
  width: 100%;
  max-width: 420px;
}

.login-box h1 {
  text-align: center;
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.login-box .tabs {
  display: flex;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--gray-200);
}

.login-box .tabs .tab {
  flex: 1;
  padding: 0.75rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-500);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.login-box .tabs .tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.form-container {
  display: none;
}

.form-container.active {
  display: block;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.375rem;
  font-weight: 500;
  color: var(--gray-700);
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  color: var(--gray-500);
  font-size: 0.8rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.form-row .form-group {
  margin-bottom: 0;
}

.form-group.align-end {
  display: flex;
  align-items: flex-end;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  font-family: inherit;
  gap: 0.375rem;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

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

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-success {
  background: var(--success);
  color: var(--white);
}

.btn-warning {
  background: var(--warning);
  color: var(--white);
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-700);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

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

/* --- Navigation --- */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  color: var(--gray-600);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  font-weight: 500;
  transition: var(--transition);
  font-size: 0.9375rem;
}

.nav-link:hover {
  background: var(--gray-100);
  color: var(--primary);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-user {
  margin-left: 0.5rem;
  color: var(--gray-600);
  font-size: 0.875rem;
}

/* --- Container --- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* --- Page Header --- */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.75rem;
  color: var(--gray-900);
  margin-bottom: 0.25rem;
}

.page-header .text-muted {
  color: var(--gray-500);
  font-size: 0.9375rem;
}

/* --- Stats Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.stat-label {
  color: var(--gray-500);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* --- Sections --- */
.section {
  margin-bottom: 2rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: 1.25rem;
  color: var(--gray-900);
}

/* --- Cards --- */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 1.5rem;
}

.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
}

/* --- Projects --- */
.projects-list {
  display: grid;
  gap: 0.75rem;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: var(--transition);
}

.project-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.project-card > div:first-child {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8125rem;
}

/* --- Tasks --- */
.tasks-list {
  display: grid;
  gap: 0.5rem;
}

.task-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.task-item > div {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.task-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary);
}

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

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

.badge-secondary {
  background: var(--gray-100);
  color: var(--gray-600);
}

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

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

/* --- Priority Badge --- */
.priority-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
}

.priority-low {
  background: var(--info-light);
  color: var(--info);
}

.priority-medium {
  background: var(--warning-light);
  color: var(--warning);
}

.priority-high {
  background: var(--danger-light);
  color: var(--danger);
}

/* --- Status Badge --- */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.status-todo {
  background: var(--gray-100);
  color: var(--gray-600);
}

.status-in-progress {
  background: var(--info-light);
  color: var(--info);
}

.status-in-review {
  background: var(--warning-light);
  color: var(--warning);
}

.status-done {
  background: var(--success-light);
  color: var(--success);
}

/* --- Table --- */
.table-responsive {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.table thead th {
  background: var(--gray-50);
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--gray-200);
}

.table tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.9375rem;
}

.table tbody tr:hover {
  background: var(--gray-50);
}

/* --- Modal --- */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 {
  font-size: 1.125rem;
  color: var(--gray-900);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-500);
  line-height: 1;
  padding: 0;
}

.modal-close:hover {
  color: var(--gray-800);
}

.modal-content form {
  padding: 1.5rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--gray-200);
}

/* --- Timesheet --- */
.timesheet-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.timesheet-filters {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--gray-200);
}

.timesheet-filters .filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.timesheet-filters label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--gray-600);
  white-space: nowrap;
}

.timesheet-filters select {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

.timesheet-grid {
  overflow-x: auto;
}

.timesheet-header-row,
.timesheet-row {
  display: grid;
  grid-template-columns: 100px 80px 80px 120px 1fr 60px;
  padding: 0.5rem 1.25rem;
  gap: 0.5rem;
}

.timesheet-header-row {
  background: var(--gray-50);
  border-bottom: 2px solid var(--gray-200);
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--gray-600);
  text-transform: uppercase;
}

.timesheet-header-row .day-label,
.timesheet-row .day-label {
  padding: 0.375rem;
}

.timesheet-row {
  border-bottom: 1px solid var(--gray-100);
  transition: var(--transition);
}

.timesheet-row:hover {
  background: var(--gray-50);
}

.timesheet-row .time-input {
  width: 100%;
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.timesheet-row .time-input:focus {
  outline: none;
  border-color: var(--primary);
}

.timesheet-row .desc-input {
  width: 100%;
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.timesheet-total-row {
  display: grid;
  grid-template-columns: 100px 80px 80px 120px 1fr 60px;
  padding: 0.75rem 1.25rem;
  background: var(--primary-light);
  border-top: 2px solid var(--primary);
}

.quick-entry {
  padding: 1.25rem;
}

.entries-log {
  padding: 1.25rem;
}

.entry-date {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.entry-hours {
  font-weight: 600;
  color: var(--primary);
}

.entry-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.375rem 0 0.375rem 1rem;
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* --- Kanban Board --- */
.kanban-container {
  padding-top: 1rem;
}

.kanban-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kanban-filters {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.kanban-filters select {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

.kanban-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  min-height: 500px;
}

.kanban-column {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
}

.kanban-column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding: 0.375rem 0.5rem;
}

.column-title {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--gray-800);
}

.column-count {
  background: var(--gray-200);
  color: var(--gray-600);
  border-radius: 999px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
}

.kanban-cards {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 100px;
  padding: 0.25rem;
}

.kanban-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  border-left: 3px solid transparent;
}

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

.kanban-card:active {
  transform: translateY(0);
}

.card-priority {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.priority-low .card-priority { background: var(--info); }
.priority-medium .card-priority { background: var(--warning); }
.priority-high .card-priority { background: var(--danger); }

.card-title {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--gray-800);
  margin-bottom: 0.5rem;
}

.card-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.75rem;
  color: var(--gray-500);
}

/* --- Error --- */
.error-msg {
  color: var(--danger);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  min-height: 1.25rem;
}

/* --- Utilities --- */
.text-muted {
  color: var(--gray-500);
}

.empty-state {
  text-align: center;
  color: var(--gray-500);
  padding: 2rem;
}

.unauthorized {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .kanban-board {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }
  
  .nav-links {
    flex-wrap: wrap;
  }
  
  .nav-link {
    padding: 0.375rem 0.5rem;
    font-size: 0.8125rem;
  }
  
  .container {
    padding: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .kanban-board {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .timesheet-header-row,
  .timesheet-row {
    grid-template-columns: 80px 60px 60px 100px 1fr 50px;
    font-size: 0.8125rem;
  }
  
  .login-box {
    padding: 1.5rem;
  }
}

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