:root {
    --mtts-primary: #4b0082;
    /* Indigo */
    --mtts-primary-dark: #3a0063;
    --mtts-accent: #ffd700;
    /* Gold */
    --mtts-bg: #f4f6f9;
    --mtts-text: #333333;
    --mtts-text-light: #666666;
    --mtts-white: #ffffff;
    --mtts-card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --mtts-radius: 12px;
    --mtts-font: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    font-family: var(--mtts-font);
    background-color: var(--mtts-bg);
    color: var(--mtts-text);
    margin: 0;
}

/* Dashboard Layout */
.mtts-dashboard-wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.mtts-sidebar {
    width: 260px;
    background: #0f172a;
    /* Slate 900 */
    color: var(--mtts-white);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease-in-out;
}

.mtts-dashboard-content {
    flex: 1;
    width: 100%;
    padding: 20px;
    transition: margin-left 0.3s ease-in-out;
}

/* Mobile Sidebar State */
@media (max-width: 991px) {
    .mtts-sidebar {
        transform: translateX(-100%);
    }

    .mtts-sidebar.active {
        transform: translateX(0);
    }

    .mtts-dashboard-content {
        margin-left: 0 !important;
        padding: 15px;
    }

    .mtts-sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        backdrop-filter: blur(2px);
    }

    .mtts-sidebar-overlay.active {
        display: block;
    }
}

/* Desktop Sidebar State */
@media (min-width: 992px) {
    .mtts-sidebar {
        transform: translateX(0);
    }

    .mtts-dashboard-content {
        margin-left: 260px;
        padding: 30px;
    }

    .mtts-mobile-toggle,
    .mtts-sidebar-close {
        display: none !important;
    }
}

/* Mobile Toggle Button */
.mtts-mobile-toggle {
    background: var(--mtts-primary);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.mtts-sidebar-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    opacity: 0.7;
}

.mtts-sidebar-close:hover {
    opacity: 1;
}


/* Sidebar Styling */
.mtts-lecturer-info,
.mtts-student-info {
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mtts-user-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid var(--mtts-accent);
    object-fit: cover;
    margin-bottom: 10px;
}

.mtts-nav ul {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.mtts-nav li a {
    display: flex;
    align-items: center;
    padding: 12px 25px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.mtts-nav li a:hover,
.mtts-nav li a.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--mtts-white);
    border-left-color: var(--mtts-accent);
}

/* Card Styling */
.mtts-card {
    background: var(--mtts-white);
    border-radius: var(--mtts-radius);
    padding: 25px;
    box-shadow: var(--mtts-card-shadow);
    margin-bottom: 25px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.mtts-card h3 {
    margin-top: 0;
    color: var(--mtts-primary);
    font-size: 1.25rem;
    margin-bottom: 20px;
    font-weight: 600;
}

/* Grid System */
.mtts-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.mtts-stat-card {
    text-align: center;
}

.mtts-stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--mtts-primary);
    margin: 10px 0;
}

/* Tables */
.mtts-table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 25px;
    background: var(--mtts-white);
    border-radius: var(--mtts-radius);
    box-shadow: var(--mtts-card-shadow);
}

.mtts-table-list {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    min-width: 600px;
    /* Force scroll on small screens */
}


.mtts-table-list th,
.mtts-table-list td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.mtts-table-list th {
    background: #f8fafc;
    color: var(--mtts-text-light);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mtts-table-list tr:last-child td {
    border-bottom: none;
}

/* Buttons */
.mtts-btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 0.9rem;
}

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

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

.mtts-btn-small {
    padding: 6px 12px;
    font-size: 0.8rem;
    background: #e2e8f0;
    color: var(--mtts-text);
}

.mtts-btn-small:hover {
    background: #cbd5e1;
}

/* Forms */
.mtts-form-group {
    margin-bottom: 20px;
}

.mtts-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--mtts-text);
}

.mtts-form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.mtts-form-control:focus {
    outline: none;
    border-color: var(--mtts-primary);
    box-shadow: 0 0 0 3px rgba(75, 0, 130, 0.1);
}

/* Status Badges */
.mtts-status {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.mtts-status-registered,
.mtts-status-success,
.mtts-status-approved,
.mtts-status-present {
    background: #dcfce7;
    color: #166534;
}

.mtts-status-pending,
.mtts-status-excused {
    background: #fef9c3;
    color: #854d0e;
}

.mtts-status-failed,
.mtts-status-rejected,
.mtts-status-absent {
    background: #fee2e2;
    color: #991b1b;
}

/* Alerts */
.mtts-alert {
    padding: 15px;
    border-radius: var(--mtts-radius);
    margin-bottom: 20px;
    border-left: 4px solid;
}

.mtts-alert-success {
    background: #f0fdf4;
    border-color: #22c55e;
    color: #15803d;
}

.mtts-alert-warning {
    background: #fefce8;
    border-color: #eab308;
    color: #a16207;
}

.mtts-alert-info {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #1d4ed8;
}