/* Modern UI Design for Teacher Appointment System */

:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --success: #2ec4b6;
    --danger: #e63946;
    --warning: #ff9f1c;
    --info: #4cc9f0;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --gray-dark: #343a40;
    --body-bg: #f5f7fa;
    --card-bg: #ffffff;
    --border-radius: 0.5rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --font-family: 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Base Styles */
body {
    font-family: var(--font-family);
    background-color: var(--body-bg);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 70px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--secondary) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-info { color: var(--info) !important; }

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    transition: var(--transition);
    text-transform: none;
    box-shadow: none;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

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

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 0.125rem 0.25rem rgba(67, 97, 238, 0.4);
}

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

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

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

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

.btn-info {
    background-color: var(--info);
    border-color: var(--info);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

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

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    background-color: var(--card-bg);
    transition: var(--transition);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--box-shadow-lg);
    transform: translateY(-3px);
}

.card-header {
    background-color: transparent;
    border-bottom: 1px solid var(--gray-light);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

.card-header.bg-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
    color: white;
    border-bottom: none;
}

.card-header.bg-success {
    background: linear-gradient(135deg, var(--success) 0%, #20a99d 100%) !important;
    color: white;
    border-bottom: none;
}

.card-header.bg-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #d32f3c 100%) !important;
    color: white;
    border-bottom: none;
}

.card-header.bg-warning {
    background: linear-gradient(135deg, var(--warning) 0%, #f08700 100%) !important;
    color: white;
    border-bottom: none;
}

.card-header.bg-info {
    background: linear-gradient(135deg, var(--info) 0%, #37b6e9 100%) !important;
    color: white;
    border-bottom: none;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: transparent;
    border-top: 1px solid var(--gray-light);
    padding: 1.25rem 1.5rem;
}

/* Navbar */
.navbar {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 0.75rem 1rem;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--dark);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover, 
.navbar-nav .nav-link:focus,
.navbar-nav .nav-link.active {
    color: var(--primary);
    background-color: rgba(67, 97, 238, 0.1);
}

.navbar-nav .nav-link.active {
    font-weight: 600;
}

.navbar-toggler {
    border: none;
    padding: 0.25rem 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    border-top: none;
    background-color: var(--gray-light);
}

.table td {
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.05);
}

.table-responsive {
    border-radius: var(--border-radius);
    overflow: hidden;
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.4em 0.8em;
    border-radius: 30px;
}

.badge.bg-primary { background-color: var(--primary) !important; }
.badge.bg-secondary { background-color: var(--secondary) !important; }
.badge.bg-success { background-color: var(--success) !important; }
.badge.bg-danger { background-color: var(--danger) !important; }
.badge.bg-warning { background-color: var(--warning) !important; }
.badge.bg-info { background-color: var(--info) !important; }

/* Forms */
.form-control, .form-select {
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    border: 1px solid var(--gray-light);
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.25);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
}

.alert-primary {
    background-color: rgba(67, 97, 238, 0.15);
    color: var(--primary-dark);
}

.alert-success {
    background-color: rgba(46, 196, 182, 0.15);
    color: #20a99d;
}

.alert-danger {
    background-color: rgba(230, 57, 70, 0.15);
    color: #d32f3c;
}

.alert-warning {
    background-color: rgba(255, 159, 28, 0.15);
    color: #f08700;
}

.alert-info {
    background-color: rgba(76, 201, 240, 0.15);
    color: #37b6e9;
}

/* Modals */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid var(--gray-light);
    padding: 1.25rem 1.5rem;
}

.modal-header.bg-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
    color: white;
    border-bottom: none;
}

.modal-header.bg-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #d32f3c 100%) !important;
    color: white;
    border-bottom: none;
}

.modal-header.bg-info {
    background: linear-gradient(135deg, var(--info) 0%, #37b6e9 100%) !important;
    color: white;
    border-bottom: none;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--gray-light);
    padding: 1.25rem 1.5rem;
}

/* Calendar */
.fc {
    font-family: var(--font-family);
}

.fc .fc-button-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.fc .fc-button-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.fc .fc-button-primary:disabled {
    background-color: var(--primary);
    border-color: var(--primary);
    opacity: 0.65;
}

.fc .fc-button-primary:not(:disabled):active, 
.fc .fc-button-primary:not(:disabled).fc-button-active {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.fc .fc-daygrid-day.fc-day-today {
    background-color: rgba(67, 97, 238, 0.1);
}

.fc .fc-event {
    background-color: var(--primary);
    border-color: var(--primary);
    border-radius: 4px;
}

.fc .fc-event.fc-event-pending {
    background-color: var(--warning);
    border-color: var(--warning);
}

.fc .fc-event.fc-event-approved {
    background-color: var(--success);
    border-color: var(--success);
}

.fc .fc-event.fc-event-rejected {
    background-color: var(--danger);
    border-color: var(--danger);
}

.fc .fc-event.fc-event-canceled {
    background-color: var(--gray);
    border-color: var(--gray);
}

/* Dashboard Stat Cards */
.stat-card {
    border-radius: var(--border-radius);
    padding: 1.5rem;
    height: 100%;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(30%, -30%);
    z-index: -1;
}

.stat-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-30%, 30%);
    z-index: -1;
}

.stat-card .stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.stat-card .stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-card .stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-light);
}

::-webkit-scrollbar-thumb {
    background: var(--gray);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-dark);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .navbar-collapse {
        background-color: white;
        padding: 1rem;
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
        margin-top: 0.5rem;
    }
    
    .stat-card .stat-value {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
    
    .card-body {
        padding: 1.25rem;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
    
    .stat-card .stat-icon {
        font-size: 2.5rem;
    }
    
    .stat-card .stat-value {
        font-size: 1.75rem;
    }
}

@media (max-width: 576px) {
    .btn {
        padding: 0.4rem 1rem;
    }
    
    .card-header, .card-footer {
        padding: 1rem 1.25rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .modal-header, .modal-footer {
        padding: 1rem 1.25rem;
    }
    
    .modal-body {
        padding: 1.25rem;
    }
}

/* Custom Classes */
.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-light);
}

.appointment-card {
    transition: var(--transition);
    cursor: pointer;
}

.appointment-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-lg);
}

.appointment-card .appointment-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.availability-time-slot {
    background-color: var(--gray-light);
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.availability-time-slot:hover {
    background-color: rgba(67, 97, 238, 0.1);
}

.profile-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.profile-header::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.profile-header::after {
    content: '';
    position: absolute;
    bottom: -50px;
    left: -50px;
    width: 250px;
    height: 250px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 5px solid white;
    box-shadow: var(--box-shadow);
    margin-bottom: 1rem;
}

.login-container {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.1) 0%, rgba(76, 201, 240, 0.1) 100%);
}

.login-card {
    max-width: 450px;
    width: 100%;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    background-color: white;
}

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

.login-card .login-logo img {
    max-width: 150px;
}

.login-card .login-title {
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.footer {
    background-color: white;
    padding: 2rem 0;
    margin-top: 3rem;
    border-top: 1px solid var(--gray-light);
}

.footer-logo {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-light);
    text-align: center;
}

/* Loading Spinner */
.spinner-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(255, 255, 255, 0.7);
    z-index: 1000;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(67, 97, 238, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
}

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

/* Print Styles */
@media print {
    body {
        background-color: white;
        padding-top: 0;
    }
    
    .navbar, .footer, .print-hide {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .card-header.bg-primary,
    .card-header.bg-success,
    .card-header.bg-danger,
    .card-header.bg-warning,
    .card-header.bg-info {
        background: none !important;
        color: black !important;
        border-bottom: 1px solid #ddd;
    }
    
    .badge {
        border: 1px solid #000;
        color: #000 !important;
        background-color: transparent !important;
    }
}