* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-red: #dc2626;
    --primary-red-dark: #b91c1c;
    --dark: #1f2937;
    --light: #f9fafb;
    --gray: #e5e7eb;
    --gray-dark: #6b7280;
    --white: #ffffff;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
}

body {
    font-family: 'Poppins', 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #f0f2f5 100%);
    color: var(--dark);
    line-height: 1.6;
}

.landing-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a 0%, #dc2626 50%, #1e3a8a 100%);
    padding: 20px;
}

.landing-card {
    background: var(--white);
    border-radius: 30px;
    padding: 60px 50px;
    text-align: center;
    max-width: 600px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.landing-logo i {
    font-size: 80px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 20px;
}

.landing-card h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.landing-card h1 span {
    font-size: 1.2rem;
    color: var(--gray-dark);
    font-weight: 500;
}

.acronym {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 4px;
    margin-bottom: 20px;
}

.landing-card p {
    color: var(--gray-dark);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.landing-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.demo-info {
    background: linear-gradient(135deg, #eff6ff 0%, #fef2f2 100%);
    padding: 20px;
    border-radius: 16px;
    border-left: 4px solid var(--primary-red);
}

.btn-primary, .btn-secondary {
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--primary-red-dark) 100%);
    color: var(--white);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.4);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.85rem;
    border-radius: 6px;
    background: var(--gray);
    color: var(--dark);
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-sm:hover {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    color: white;
}

.auth-body {
    background: linear-gradient(135deg, #1e3a8a 0%, #dc2626 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.auth-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.6s ease-out;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header i {
    font-size: 50px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 15px;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group label i {
    margin-right: 8px;
    color: var(--primary-blue);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.auth-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid var(--gray);
}

.auth-footer a {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
}

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

.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: linear-gradient(180deg, #1e3a8a 0%, #1f2937 100%);
    color: var(--white);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 30px 25px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header i {
    font-size: 45px;
    background: linear-gradient(135deg, #60a5fa 0%, #fca5a5 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 10px;
}

.sidebar-header h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: white;
}

.tagline {
    font-size: 0.7rem;
    opacity: 0.8;
    display: block;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 25px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s;
    margin: 4px 12px;
    border-radius: 12px;
}

.nav-item:hover {
    background: rgba(255,255,255,0.1);
    color: var(--white);
    transform: translateX(5px);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    color: var(--white);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.logout-btn {
    width: 100%;
    padding: 12px;
    background: rgba(255,255,255,0.1);
    color: var(--white);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s;
    font-family: 'Poppins', sans-serif;
}

.logout-btn:hover {
    background: var(--primary-red);
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 25px;
}

.top-header {
    background: var(--white);
    padding: 20px 30px;
    border-radius: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.header-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-title i {
    font-size: 28px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    background: linear-gradient(135deg, #eff6ff 0%, #fef2f2 100%);
    padding: 8px 18px;
    border-radius: 50px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 25px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-red) 100%);
}

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

.stat-number {
    font-size: 2.2rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.data-table {
    background: var(--white);
    border-radius: 20px;
    overflow-x: auto;
    box-shadow: var(--shadow);
    padding: 20px;
}

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

.data-table th, .data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray);
}

.data-table th {
    background: linear-gradient(135deg, #eff6ff 0%, #fef2f2 100%);
    font-weight: 600;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.course-card {
    background: var(--white);
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-red) 100%);
}

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

.course-card h3 {
    margin-bottom: 12px;
    color: var(--primary-blue);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--white);
    border-radius: 24px;
    padding: 35px;
    width: 90%;
    max-width: 550px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: fadeInUp 0.3s ease-out;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    cursor: pointer;
    color: var(--gray-dark);
    transition: all 0.3s;
}

.close:hover {
    color: var(--primary-red);
    transform: rotate(90deg);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fed7aa; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
        z-index: 999;
        width: 260px;
    }
    .main-content {
        margin-left: 0;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .landing-buttons {
        flex-direction: column;
    }
    .landing-card {
        padding: 40px 25px;
    }
}

/* Improved Table Styles */
.data-table {
    background: var(--white);
    border-radius: 20px;
    overflow-x: auto;
    box-shadow: var(--shadow-md);
    padding: 0;
    margin-top: 20px;
}

.data-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.data-table th {
    background: linear-gradient(135deg, #eff6ff 0%, #fef2f2 100%);
    padding: 16px 15px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 2px solid var(--gray);
    font-size: 14px;
}

.data-table td {
    padding: 14px 15px;
    text-align: left;
    border-bottom: 1px solid var(--gray);
    color: var(--dark);
    font-size: 14px;
    vertical-align: middle;
}

.data-table tr:hover {
    background: linear-gradient(90deg, #eff6ff 0%, #fef2f2 100%);
}

.data-table .badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.data-table .badge-success {
    background: #d1fae5;
    color: #065f46;
}

.data-table .badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.data-table .btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    margin: 0 4px;
}

.data-table .btn-sm.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
}

.data-table .btn-sm.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #991b1b 100%);
    color: white;
}

.data-table .btn-sm:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* Action buttons container */
.table-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Course card improvements */
.course-card {
    background: var(--white);
    border-radius: 20px;
    padding: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-red) 100%);
}

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

.course-card h3 {
    margin-bottom: 12px;
    color: var(--primary-blue);
    font-size: 1.2rem;
}

.course-card p {
    color: var(--gray-dark);
    margin-bottom: 15px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.course-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

/* Stats card improvements */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 20px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-red) 100%);
}

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

.stat-info h3 {
    font-size: 0.85rem;
    color: var(--gray-dark);
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-red) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat-icon i {
    font-size: 40px;
    color: var(--gray);
}

/* Responsive table */
@media (max-width: 768px) {
    .data-table {
        border-radius: 12px;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: 12px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .course-card {
        padding: 15px;
    }
}