:root {
    --primary-color: #1a73e8;
    --hover-color: #1557b0;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    min-height: 100vh;
}

.login-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px;
}

.login-box {
    width: 400px;
    max-width: 90%;
    margin-top: 20px;
}

.card {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: none;
    overflow: hidden;
}

.login-card-body {
    padding: 35px;
}

.login-logo img {
    transition: transform 0.3s ease;
}

.login-logo img:hover {
    transform: scale(1.05);
}

.input-group {
    margin-bottom: 25px;
}

.form-control {
    border-radius: 8px;
    padding: 12px;
    border: 2px solid #e0e0e0;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(26, 115, 232, 0.15);
}

.input-group-text {
    border-radius: 8px;
    background-color: #f8f9fa;
    border: 2px solid #e0e0e0;
    color: #666;
}

.btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--hover-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.2);
}

.login-box-msg {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 25px;
    text-align: center;
}

.year-badge {
    background-color: #e8f0fe;
    color: var(--primary-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-top: 10px;
    display: inline-block;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: var(--hover-color);
    text-decoration: underline;
}

footer {
    margin-top: 40px;
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

.developer-info {
    margin-top: 10px;
    font-size: 0.8rem;
}

/* Loading spinner */
.spinner-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .login-box {
        width: 100%;
    }
    
    .login-card-body {
        padding: 25px;
    }
}