.easy-mark-table th, .easy-mark-table td {
    vertical-align: middle !important;
    font-size: 15px;
}
.easy-mark-table input[type="number"], .easy-mark-table input[type="text"] {
    outline: none;
    transition: border 0.2s;
}
.easy-mark-table input:focus {
    border: 1.5px solid #007bff;
    background: #f0f7ff;
}
.easy-mark-table .btn.btn-success.btn-sm {
    font-size: 14px;
    border-radius: 6px;
}
.easy-mark-table .btn.btn-primary.btn-sm {
    font-size: 14px;
    border-radius: 6px;
}

#btnShowAttHistory {
    background: #17a2b8;
    color: #fff;
    border: none;
    padding: 8px 18px;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.18s, color 0.18s;
    margin-left: 12px;
    box-shadow: 0 2px 8px rgba(23,162,184,0.08);
}
#btnShowAttHistory:hover {
    background: #138496;
    color: #fff;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.3);
}
.modal-content {
    background: #fff;
    margin: 5% auto;
    padding: 20px;
    border-radius: 8px;
    max-width: 900px;
    position: relative;
    box-shadow: 0 4px 32px rgba(0,0,0,0.15);
}
.modal-content h3 {
    margin-top: 0;
}
#closeAttHistory {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #888;
    transition: color 0.2s;
}
#closeAttHistory:hover {
    color: #e74c3c;
}
/* Modern Student Dashboard Styles */
.modern-student {
    display: flex;
    min-height: 100vh;
    background: var(--bg-color);
}

.modern-sidebar {
    width: 240px;
    background: #fff;
    box-shadow: 2px 0 12px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    padding: 0;
    border-radius: 0 18px 18px 0;
    z-index: 2;
}
.sidebar-logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    padding: 28px 0 18px 0;
    text-align: center;
    letter-spacing: 1px;
    border-bottom: 1px solid #f0f0f0;
    background: #f8faff;
}
.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 18px 0;
}
.sidebar-menu a {
    color: var(--text-color);
    font-weight: 500;
    padding: 12px 32px;
    border-radius: 0 20px 20px 0;
    transition: background 0.18s, color 0.18s;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-menu a.active, .sidebar-menu a:hover {
    background: var(--primary-color);
    color: #fff;
}
.logout-btn {
    margin-top: 24px;
    color: var(--danger-color) !important;
    font-weight: 600;
}

.modern-main {
    flex: 1;
    padding: 36px 36px 36px 0;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.modern-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}
.modern-header h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 0;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.modern-profile {
    display: flex;
    align-items: center;
    gap: 14px;
    background: #f8faff;
    padding: 8px 18px 8px 8px;
    border-radius: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.avatar-circle {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.user-name {
    font-size: 1rem;
    color: var(--text-color);
}

.modern-stats {
    display: flex;
    gap: 28px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.modern-stat {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.07);
    padding: 24px 32px;
    display: flex;
    align-items: center;
    gap: 18px;
    min-width: 180px;
    flex: 1 1 180px;
    transition: transform 0.15s, box-shadow 0.15s;
}
.modern-stat:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 6px 24px rgba(0,0,0,0.10);
}
.stat-icon {
    font-size: 2.2rem;
    color: var(--primary-color);
    background: #f0f6ff;
    border-radius: 50%;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.stat-info h3 {
    margin: 0 0 2px 0;
    font-size: 1.6rem;
    color: var(--primary-color);
    font-weight: 700;
}
.stat-info p {
    margin: 0;
    color: #666;
    font-size: 1rem;
}

.modern-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.07);
    padding: 28px 24px 18px 24px;
    margin-bottom: 32px;
}
.modern-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.table-responsive {
    width: 100%;
    overflow-x: auto;
}
.modern-table {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    background: #fff;
}
.modern-table th, .modern-table td {
    padding: 14px 12px;
    font-size: 1rem;
}
.modern-table th {
    background: #f0f6ff;
    color: var(--primary-color);
    font-weight: 700;
    border-bottom: 2px solid #e0e7ef;
}
.modern-table tr {
    transition: background 0.13s;
}
.modern-table tbody tr:hover {
    background: #f5faff;
}

@media (max-width: 900px) {
    .modern-student {
        flex-direction: column;
    }
    .modern-sidebar {
        width: 100%;
        border-radius: 0 0 18px 18px;
        flex-direction: row;
        justify-content: space-between;
        box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    }
    .modern-main {
        padding: 24px 6px;
    }
    .modern-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .modern-stats {
        gap: 12px;
    }
}
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --bg-color: #f4f6f8;
    --white: #ffffff;
    --border-color: #ddd;
    --text-color: #333;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
}

a { text-decoration: none; }

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

nav {
    background: var(--primary-color);
    padding: 14px 0;
    color: var(--white);
    margin-bottom: 20px;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
}

.brand { font-weight: 700; letter-spacing: 0.4px; }

.menu {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.menu a {
    color: var(--white);
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
}

.menu a.active,
.menu a:hover {
    background: rgba(255, 255, 255, 0.16);
}

.card {
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    padding: 20px;
    margin-bottom: 20px;
}

h1, h3, h4 {
    margin-top: 0;
    color: var(--primary-color);
}

h3 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 14px;
}

.row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.col-half {
    flex: 1;
    min-width: 260px;
}

input, select, textarea {
    width: 100%;
    padding: 10px;
    margin: 6px 0 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
}

.grid-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 10px;
    margin-bottom: 12px;
}

.actions {
    display: flex;
    gap: 6px;
}

.btn {
    border: none;
    border-radius: 4px;
    color: var(--white);
    padding: 10px 14px;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary { background: var(--primary-color); }
.btn-success { background: var(--success-color); }
.btn-danger { background: var(--danger-color); }
.btn-secondary { background: var(--secondary-color); }
.btn-sm { font-size: 12px; padding: 6px 10px; }

.btn:hover { opacity: 0.9; }

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    background: var(--white);
}

th, td {
    border: 1px solid var(--border-color);
    padding: 10px;
    text-align: left;
    font-size: 14px;
    vertical-align: top;
}

th { background: #f2f2f2; }
tr:nth-child(even) { background: #fafafa; }

.stat-box {
    flex: 1;
    min-width: 200px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px;
    background: #fcfcfc;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: #666;
    margin-bottom: 6px;
}

.stat-box strong { font-size: 24px; }

.alert {
    padding: 10px 12px;
    margin: 10px 0;
    border-radius: 4px;
    font-size: 14px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
}

.hidden { display: none; }

.simple-list {
    margin: 0;
    padding-left: 18px;
}

.simple-list li {
    margin-bottom: 8px;
}

.auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: #fff;
}

.auth-card {
    width: 100%;
    max-width: 460px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    padding: 24px;
}

.muted {
    color: #666;
}

.small {
    font-size: 12px;
}

@media (max-width: 900px) {
    .nav-content {
        flex-direction: column;
        align-items: flex-start;
    }
}