body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #e8f4f8 0%, #f0f8ff 50%, #e6f2ff 100%);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.06);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.logo {
    font-size: 2.2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

.subtitle {
    color: #6c757d;
    margin-bottom: 2.5rem;
    font-size: 0.95rem;
}

.login-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-btn {
    display: block;
    text-decoration: none;
    padding: 1.2rem;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    transition: all 0.3s ease;
    color: #ffffff;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.login-btn:hover::before {
    transform: translateX(0);
}

.admin-btn {
    background: linear-gradient(135deg, #dc3545, #c82333);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.25);
}

.admin-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(220, 53, 69, 0.35);
}

.secretary-btn {
    background: linear-gradient(135deg, #20c997, #17a589);
    box-shadow: 0 4px 12px rgba(32, 201, 151, 0.25);
}

.secretary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(32, 201, 151, 0.35);
}

.customer-btn {
    background: linear-gradient(135deg, #0d6efd, #0b5ed7);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.25);
}

.customer-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(13, 110, 253, 0.35);
}