/* Modern UI Style - QR Student Attendance System */
:root {
    --primary-color: #4361ee;
    --primary-gradient: linear-gradient(135deg, #4361ee, #3a0ca3);
    --secondary-color: #4cc9f0;
    --secondary-gradient: linear-gradient(135deg, #4cc9f0, #4895ef);
    --success-color: #2ec4b6;
    --success-gradient: linear-gradient(135deg, #2ec4b6, #20a4f3);
    --danger-color: #e63946;
    --danger-gradient: linear-gradient(135deg, #e63946, #d90429);
    --warning-color: #fb8500;
    --warning-gradient: linear-gradient(135deg, #fb8500, #ffb703);
    --info-color: #4895ef;
    --info-gradient: linear-gradient(135deg, #4895ef, #4361ee);
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --sidebar-width: 280px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    --border-radius: 0.75rem;
    --border-radius-sm: 0.5rem;
    --border-radius-lg: 1rem;
    --card-border-radius: 1rem;
    --transition-speed: 0.3s;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --modal-z-index: 1050;
}

html, body {
    height: 100%;
    margin: 0;
}

/* Base Styles */
body {
    font-family: 'Kanit', sans-serif;
    font-weight: var(--font-weight-normal);
    background-color: var(--gray-100);
    color: var(--gray-700);
    overflow-x: hidden;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

body.sidebar-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    color: var(--gray-900);
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.25rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-speed) ease;
}

a:hover {
    color: var(--secondary-color);
    text-decoration: none;
}

/* Wrapper and Container */
.wrapper {
    display: flex;
    width: 100%;
    min-height: 100vh;
    align-items: stretch;
    flex-grow: 1;
}

/* Sidebar */
#sidebar {
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    background: var(--dark-color);
    color: #fff;
    transition: all var(--transition-speed);
    height: 100vh;
    position: fixed;
    z-index: 1000;
    padding: 0;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.1);
    left: 0;
}

#sidebar.active {
    left: calc(-1 * var(--sidebar-width));
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
    opacity: 0;
    transition: all 0.3s ease-in-out;
    top: 0;
    left: 0;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

.sidebar-header {
    background: var(--primary-gradient);
    padding: 2rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1.5rem;
    color: #fff;
}

.profile-info {
    display: flex;
    align-items: center;
}

.avatar {
    width: 48px;
    height: 48px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.75rem;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.avatar span {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: #fff;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-details h6 {
    margin: 0;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    color: #fff;
}

.user-details small {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
}

#sidebar ul.components {
    padding: 1rem 0;
    margin: 0;
}

#sidebar ul li {
    padding: 0.25rem 0;
}

#sidebar ul li a {
    padding: 0.8rem 1.5rem;
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all var(--transition-speed);
    border-radius: 0.5rem;
    margin: 0 0.75rem;
}

#sidebar ul li a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

#sidebar ul li.active a {
    color: #fff;
    background: var(--primary-gradient);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

#sidebar ul li a i {
    margin-right: 0.75rem;
    width: 24px;
    text-align: center;
    font-size: 1rem;
}

/* Content */
#content {
    width: 100%;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-speed);
    padding: 0;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

#content.active {
    margin-left: 0;
}

/* Navbar */
.navbar {
    padding: 1rem 2rem;
    background: #fff;
    box-shadow: var(--box-shadow);
    border: none;
    margin-bottom: 2rem;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

#sidebarCollapse {
    background: transparent;
    border: none;
    color: var(--primary-color);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    transition: all var(--transition-speed);
}

#sidebarCollapse:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.navbar-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
    color: var(--gray-800);
}

/* Main Content */
.main-content {
    padding: 0 2rem 2rem;
    flex: 1 0 auto;
}

/* Cards */
.card {
    box-shadow: var(--box-shadow);
    border: 0;
    border-radius: var(--card-border-radius);
    margin-bottom: 1.5rem;
    transition: all var(--transition-speed);
    overflow: hidden;
}

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

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

.card-header h5 {
    margin: 0;
    font-weight: var(--font-weight-medium);
    color: var(--gray-800);
}

.card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 1.25rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-speed);
    text-transform: none;
    box-shadow: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: var(--primary-gradient);
    border: none;
}

.btn-primary:hover, .btn-primary:focus {
    background: var(--primary-gradient);
    opacity: 0.9;
}

.btn-success {
    background: var(--success-gradient);
    border: none;
}

.btn-success:hover, .btn-success:focus {
    background: var(--success-gradient);
    opacity: 0.9;
}

.btn-danger {
    background: var(--danger-gradient);
    border: none;
}

.btn-danger:hover, .btn-danger:focus {
    background: var(--danger-gradient);
    opacity: 0.9;
}

.btn-warning {
    background: var(--warning-gradient);
    border: none;
    color: #fff;
}

.btn-warning:hover, .btn-warning:focus {
    background: var(--warning-gradient);
    opacity: 0.9;
    color: #fff;
}

.btn-info {
    background: var(--info-gradient);
    border: none;
    color: #fff;
}

.btn-info:hover, .btn-info:focus {
    background: var(--info-gradient);
    opacity: 0.9;
    color: #fff;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon i {
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

/* Progress Bar */
.progress {
    height: 0.7rem;
    border-radius: var(--border-radius);
    background-color: var(--gray-200);
    margin-bottom: 1rem;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    border-radius: var(--border-radius);
}

/* Status Indicators */
.status-indicator {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
}

.status-present {
    background-color: rgba(46, 196, 182, 0.15);
    color: var(--success-color);
}

.status-late {
    background-color: rgba(251, 133, 0, 0.15);
    color: var(--warning-color);
}

.status-absent {
    background-color: rgba(230, 57, 70, 0.15);
    color: var(--danger-color);
}

/* Stats Cards */
.stats-card {
    border-radius: var(--card-border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    transition: all var(--transition-speed);
    box-shadow: var(--box-shadow);
    border: 0;
}

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

.stats-card-primary {
    background: var(--primary-gradient);
    color: #fff;
}

.stats-card-success {
    background: var(--success-gradient);
    color: #fff;
}

.stats-card-warning {
    background: var(--warning-gradient);
    color: #fff;
}

.stats-card-danger {
    background: var(--danger-gradient);
    color: #fff;
}

.stats-card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.75rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.stats-card-primary .stats-card-icon {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.stats-card-success .stats-card-icon {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.stats-card-warning .stats-card-icon {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.stats-card-danger .stats-card-icon {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.stats-card-details h4 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.25rem;
    color: #fff;
}

.stats-card-details p {
    font-size: 0.875rem;
    margin-bottom: 0;
    opacity: 0.8;
    color: #fff;
}

/* QR Code Styling */
.qr-container {
    background-color: #fff;
    border-radius: var(--card-border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    text-align: center;
    max-width: 350px;
    margin: 0 auto;
}

.qr-code {
    padding: 1rem;
    border-radius: var(--border-radius);
    background-color: #fff;
    display: inline-block;
    margin-bottom: 1.5rem;
    border: 1px solid var(--gray-200);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.qr-info {
    text-align: center;
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--gray-100);
    border-radius: var(--border-radius);
}

#qr-reader {
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

#qr-reader__status_span {
    background-color: var(--gray-800);
    color: white;
    padding: 0.5rem;
    font-size: 0.9rem;
}

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    border: none;
    display: flex;
    align-items: center;
}

.alert i {
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

/* Forms */
.form-control, .form-select {
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    transition: all var(--transition-speed);
    font-size: 0.95rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.15);
}

.form-label {
    font-weight: var(--font-weight-medium);
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.input-group-text {
    background-color: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

/* Tables */
.table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.table thead th {
    background-color: var(--gray-100);
    font-weight: var(--font-weight-medium);
    border-bottom: 2px solid var(--gray-200);
    color: var(--gray-700);
    padding: 1rem;
    border-top: none;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-top: 1px solid var(--gray-200);
}

.table tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.01);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Pagination */
.pagination {
    margin-top: 1.5rem;
}

.page-link {
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Charts */
.chart-container {
    background-color: #fff;
    border-radius: var(--card-border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--box-shadow);
}

/* Authentication */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--primary-gradient);
}

.auth-card {
    background: #fff;
    border-radius: var(--card-border-radius);
    padding: 2.5rem;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

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

.auth-header h2 {
    font-size: 2rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.auth-header p {
    color: var(--gray-600);
    font-size: 1rem;
    margin-bottom: 0;
}

.auth-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.9rem;
    color: var(--gray-600);
}

.avatar-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
}

.avatar-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--gray-200);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.avatar-overlay {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.avatar-overlay:hover {
    transform: scale(1.1);
}

/* Badge Styling */
.badge {
    font-weight: var(--font-weight-medium);
    padding: 0.5em 0.8em;
    border-radius: 30px;
}

/* Avatar in Navbar */
.small-avatar {
    width: 38px;
    height: 38px;
    background-color: var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 2px solid var(--primary-color);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-speed);
}

.small-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15);
}

.small-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.small-avatar span {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 0;
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Footer Styling */
.footer {
    background-color: #fff;
    border-top: 1px solid var(--gray-200);
    padding: 1rem 0;
    color: var(--gray-600);
    flex-shrink: 0;
    width: 100%;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    transition: all var(--transition-speed);
    border-radius: 50%;
}

.social-links a:hover {
    background-color: var(--gray-100);
    color: var(--primary-color) !important;
    transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 992px) {
    #sidebar {
        left: calc(-1 * var(--sidebar-width));
    }
    
    #sidebar.active {
        left: calc(-1 * var(--sidebar-width));
    }
    
    #sidebar:not(.active) {
        left: 0;
        box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
    }
    
    #content {
        margin-left: 0;
    }
    
    .navbar {
        padding: 0.75rem 1.5rem;
    }
    
    .main-content {
        padding: 0 1.5rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .card-header .btn {
        margin-top: 1rem;
        align-self: flex-start;
    }
    
    .auth-card {
        padding: 2rem 1.5rem;
    }
    
    .navbar {
        padding: 1rem;
    }
    
    .main-content {
        padding: 0 1rem 1rem;
    }
    
    .stats-card {
        padding: 1.25rem;
    }
    
    .stats-card-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .stats-card-details h4 {
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .navbar-title {
        font-size: 1rem;
    }
    
    #sidebarCollapse {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .auth-header h2 {
        font-size: 1.75rem;
    }
    
    .table thead th {
        padding: 0.75rem 0.5rem;
        font-size: 0.7rem;
    }
    
    .table tbody td {
        padding: 0.75rem 0.5rem;
        font-size: 0.85rem;
    }
}

/* Instructions styling */
.instruction-list {
    margin-bottom: 20px;
}

.instruction-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.instruction-icon {
    background: var(--primary-gradient);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    color: #fff;
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
}

.instruction-text {
    font-size: 1rem;
    line-height: 1.5;
    padding-top: 4px;
}

.qr-placeholder {
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
    border-radius: var(--border-radius);
    margin: 0 auto;
    max-width: 320px;
}

.qr-container {
    background-color: #fff;
    box-shadow: var(--box-shadow);
    border-radius: var(--card-border-radius);
    padding: 20px;
    text-align: center;
    margin: 0 auto;
    max-width: 320px;
    transition: all var(--transition-speed);
}

.qr-container:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

.qr-info {
    margin-top: 15px;
    background-color: var(--gray-100);
    padding: 15px;
    border-radius: var(--border-radius);
    text-align: left;
}

.qr-info-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.qr-info-item i {
    margin-right: 8px;
    width: 20px;
    text-align: center;
    color: var(--primary-color);
}

.qr-timer {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
    margin-top: 10px;
    padding: 8px 16px;
    background-color: var(--gray-800);
    color: #fff;
    border-radius: 20px;
    display: inline-block;
}

/* Fix modal display issues */
.modal-backdrop {
    z-index: calc(var(--modal-z-index) - 1) !important;
}

.modal {
    z-index: var(--modal-z-index) !important;
}

.modal-dialog {
    z-index: calc(var(--modal-z-index) + 1) !important;
}

.modal-content {
    box-shadow: var(--box-shadow-hover);
    border: none;
    border-radius: var(--border-radius);
}

.modal-open {
    overflow: hidden;
    padding-right: 17px; /* Prevents page shifting when modal opens */
}

/* Fix for modal in modal scenario */
.modal-backdrop + .modal-backdrop {
    z-index: calc(var(--modal-z-index) + 10) !important;
}

.modal + .modal {
    z-index: calc(var(--modal-z-index) + 11) !important;
}

/* Ensure form controls in modals are clickable */
.modal .form-control, 
.modal .form-select, 
.modal .btn,
.modal .dropdown-menu {
    z-index: calc(var(--modal-z-index) + 2) !important;
    position: relative;
}

/* Modal animations for better user experience */
.modal.fade .modal-dialog {
    transition: transform 0.2s ease-out !important;
}

.modal.show .modal-dialog {
    transform: none !important;
}