:root {
    --primary: #008000;
    --secondary: #FFC107;
    --accent: #2196F3;
    --light: #f8f9fa;
    --dark: #212529;
}

.signup-form-section {
    background-color: #f8f9fa;
    padding: 4rem 0;
}

.signup-card {
    border: none;
    border-radius: 15px;
    overflow: hidden;
    background: white;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.signup-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.card-header {
    position: relative;
    overflow: hidden;
}

.card-header:after {
    content: "";
    position: absolute;
    bottom: -20px;
    left: 0;
    width: 100%;
    height: 20px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%23f8f9fa' fill-opacity='1' d='M0,96L48,112C96,128,192,160,288,186.7C384,213,480,235,576,213.3C672,192,768,128,864,128C960,128,1056,192,1152,208C1248,224,1344,192,1392,176L1440,160L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E");
    background-size: cover;
}

.form-floating > .form-control,
.form-floating > .form-select {
    height: calc(3.5rem + 2px);
    line-height: 1.25;
}

.form-floating > label {
    padding: 1rem 0.75rem;
}

.form-control, .form-select {
    border-radius: 8px;
    padding: 1rem;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(0, 128, 0, 0.25);
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    padding: 0.75rem 2rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #006400;
    border-color: #006400;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 128, 0, 0.3);
}

.invalid-feedback {
    color: #dc3545;
    font-size: 0.875rem;
}

.verification-card {
    background: white;
    border: none;
}

.verification-card h1 {
    color: var(--primary);
    font-weight: 700;
}

@media (max-width: 768px) {
    .signup-card {
        border-radius: 10px;
    }
}