/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* Header Styles */
.header {
    background-color: #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo Styles */
.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-image {
    height: 40px;
    width: auto;
    transition: opacity 0.3s ease;
}

.logo-image:hover {
    opacity: 0.8;
}

/* Navigation Menu Styles */
.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #007bff;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #007bff;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Login Button Styles */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #333;
    font-weight: 500;
}

.role-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    color: #333;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 5px rgba(255, 215, 0, 0.3);
}

.role-badge.moderator {
    background: linear-gradient(135deg, #65C7C3 0%, #7DD3CF 50%, #95DFE0 100%);
    color: white;
    box-shadow: 0 2px 5px rgba(101, 199, 195, 0.3);
}

.role-badge.student {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 2px 5px rgba(102, 126, 234, 0.3);
}

.login-btn,
.logout-btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, #65C7C3 0%, #7DD3CF 50%, #95DFE0 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid #65C7C3;
}

.logout-btn {
    background-color: #dc3545;
    border-color: #dc3545;
    background: #dc3545;
}

.login-btn:hover {
    background: linear-gradient(135deg, #4A9A97 0%, #65C7C3 50%, #7DD3CF 100%);
    border-color: #4A9A97;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(101, 199, 195, 0.3);
}

.logout-btn:hover {
    background-color: #c82333;
    border-color: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(220, 53, 69, 0.2);
}

.login-btn:active,
.logout-btn:active {
    transform: translateY(0);
}

/* Disclaimer Banner Styles */
.disclaimer-banner {
    background-color: #fff3cd;
    border-bottom: 2px solid #ffc107;
    padding: 1rem 0;
}

.disclaimer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    color: #856404;
    font-size: 0.9rem;
    line-height: 1.6;
}

.disclaimer-title {
    margin-bottom: 0.5rem;
}

.disclaimer-title strong {
    color: #721c24;
    font-size: 1rem;
}

.disclaimer-list {
    list-style-type: disc;
    margin-left: 1.5rem;
    padding-left: 0;
}

.disclaimer-list li {
    margin-bottom: 0.5rem;
}

.disclaimer-list li:last-child {
    margin-bottom: 0;
}

/* Main Content Styles */
.main-content {
    min-height: calc(100vh - 140px);
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Footer Styles */
.footer {
    background-color: #333;
    color: #ffffff;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        padding: 1rem;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .logo-image {
        height: 32px;
    }

    .header-actions {
        order: 2;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .user-welcome {
        font-size: 0.85rem;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .role-badge {
        font-size: 0.6rem;
        padding: 0.2rem 0.5rem;
    }

    .logout-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .nav-menu {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 1.5rem;
        padding-top: 0.5rem;
        border-top: 1px solid #e0e0e0;
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .login-btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }

    .disclaimer-container {
        padding: 0 1rem;
        font-size: 0.85rem;
    }

    .main-content {
        padding: 1rem;
    }
}