:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --student-color: #27ae60;
    --employee-color: #e67e22;
    --admin-color: #e74c3c;
    --light-gray: #ecf0f1;
    --dark-gray: #7f8c8d;
    --white: #ffffff;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--light-gray);
    color: var(--primary-color);
    line-height: 1.6;
}

.login-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-header {
    text-align: center;
    margin-bottom: 3rem;
}

.login-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.1rem;
    color: var(--dark-gray);
    font-weight: 300;
}

.access-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.access-card {
    background: var(--white);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s ease;
}

.access-card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.student-access .card-icon {
    color: var(--student-color);
}

.employee-access .card-icon {
    color: var(--employee-color);
}

.admin-access .card-icon {
    color: var(--admin-color);
}

.access-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.access-card p {
    color: var(--dark-gray);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--light-gray);
    color: var(--primary-color);
    margin-top: 1rem;
}

.qr-scanner {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 8px;
}

.scanner-placeholder {
    width: 100%;
    height: 200px;
    background-color: var(--dark-gray);
    opacity: 0.2;
    border-radius: 5px;
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
}

.scanner-placeholder::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px dashed var(--primary-color);
    animation: scan 2s linear infinite;
}

@keyframes scan {
    0% { top: -100%; }
    100% { top: 100%; }
}

.scanner-instruction {
    font-size: 0.9rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.hidden {
    display: none;
}

.login-footer {
    text-align: center;
    color: var(--dark-gray);
    font-size: 0.9rem;
    padding-top: 2rem;
    border-top: 1px solid #ddd;
}

@media (max-width: 768px) {
    .access-options {
        grid-template-columns: 1fr;
    }
    
    .login-header h1 {
        font-size: 2rem;
    }
}