/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --secondary-color: #6b7280;
  --light-gray: #f3f4f6;
  --border-color: #e5e7eb;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--light-gray);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 1rem 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.navbar-brand h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.navbar-user {
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.625rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background: #4b5563;
}

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

.btn-success:hover {
  background: #059669;
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

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

.btn-block {
  display: block;
  width: 100%;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

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

.btn:disabled:hover {
  transform: none;
}

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

.login-box {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-header h1 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

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

.login-footer {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.login-footer p {
  margin: 0.25rem 0;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-group textarea {
  resize: vertical;
  font-family: inherit;
}

.help-text {
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.form-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Alerts */
.alert {
  padding: 1rem;
  margin-bottom: 1.5rem;
  border-radius: var(--border-radius);
  border-left: 4px solid;
}

.alert-error {
  background: #fee2e2;
  border-color: var(--danger-color);
  color: #991b1b;
}

/* Page Header */
.page-header {
  margin: 2rem 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header h2 {
  font-size: 2rem;
  color: var(--text-primary);
  margin: 0;
}

.text-muted {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.header-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Schedule Cards Grid */
.schedules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.schedule-card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s, box-shadow 0.2s;
  overflow: hidden;
}

.schedule-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.schedule-card-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 1.25rem;
}

.schedule-card-header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.schedule-card-body {
  padding: 1.25rem;
}

.schedule-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  min-height: 2.4rem;
}

.schedule-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.info-label {
  font-weight: 500;
  color: var(--text-secondary);
}

.info-value {
  color: var(--text-primary);
}

.schedule-card-footer {
  padding: 1.25rem;
  border-top: 1px solid var(--border-color);
}

/* Schedule Time Range */
.schedule-time-range {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.75rem;
  padding: 1rem;
  background: var(--light-gray);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

/* Tasks Container */
.tasks-container {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  margin-bottom: 3rem;
}

.tasks-container h3 {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

/* Legend */
.legend {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--light-gray);
  border-radius: var(--border-radius);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

/* Tasks Grid */
.tasks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

/* Task Card */
.task-card {
  background: var(--white);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: all 0.2s;
}

.task-card:hover {
  box-shadow: var(--shadow-md);
}

.task-available {
  border-color: var(--success-color);
}

.task-marked {
  border-color: var(--secondary-color);
  background: #f9fafb;
}

.task-mine {
  border-color: var(--primary-color);
  background: #eff6ff;
}

.task-header {
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.task-header h4 {
  margin: 0;
  font-size: 1.1rem;
  flex: 1;
}

.task-body {
  padding: 1rem;
}

.task-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.task-time {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--light-gray);
  border-radius: var(--border-radius);
  font-size: 0.85rem;
}

.time-item {
  display: flex;
  gap: 0.5rem;
}

.time-label {
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 50px;
}

.time-value {
  color: var(--text-primary);
}

.task-user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: #fef3c7;
  border-radius: var(--border-radius);
  font-size: 0.9rem;
}

.user-icon {
  font-size: 1.2rem;
}

.task-marked-time {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

/* Status Badges */
.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}

.status-available {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid var(--success-color);
}

.status-marked {
  background: #e5e7eb;
  color: #374151;
  border: 1px solid var(--secondary-color);
}

.status-mine {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid var(--primary-color);
}

/* Admin Styles */
.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0 3rem;
}

.admin-card {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: transform 0.2s;
}

.admin-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.admin-card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.admin-card h3 {
  margin: 1rem 0;
  color: var(--text-primary);
}

.admin-card p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Table Styles */
.table-container {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  margin-bottom: 3rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table thead {
  background: var(--light-gray);
}

.data-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
}

.data-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

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

.data-table td.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* User Type Badges */
.user-type-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.badge-admin {
  background: #fef3c7;
  color: #92400e;
}

.badge-user {
  background: #dbeafe;
  color: #1e40af;
}

/* Form Container */
.form-container {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  margin-bottom: 3rem;
  max-width: 800px;
}

.admin-form {
  max-width: 600px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-secondary);
}

.empty-state p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    align-items: stretch;
  }

  .navbar-menu {
    justify-content: center;
  }

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

  .schedules-grid,
  .tasks-grid {
    grid-template-columns: 1fr;
  }

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

  .table-container {
    overflow-x: auto;
  }

  .data-table {
    min-width: 600px;
  }

  .login-box {
    padding: 1.5rem;
  }

  .form-actions {
    flex-direction: column;
  }

  .form-actions .btn {
    width: 100%;
  }

  .legend {
    gap: 1rem;
  }

  .schedule-time-range {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .navbar-brand h1 {
    font-size: 1.2rem;
  }

  .page-header h2 {
    font-size: 1.5rem;
  }

  .admin-grid {
    grid-template-columns: 1fr;
  }

  .tasks-grid {
    gap: 1rem;
  }

  .data-table th,
  .data-table td {
    padding: 0.75rem 0.5rem;
    font-size: 0.85rem;
  }
}