:root {
    --primary-color: #003366; /* UAP Blue */
    --secondary-color: #0055aa;
    --accent-color: #ffcc00; /* UAP Yellow/Gold accent */
    --background-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-color: #333;
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--background-gradient);
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    max-width: 120px;
    margin-bottom: 15px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 800;
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
    font-weight: 500;
}

.card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    margin-bottom: 30px;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    vertical-align: middle;
    margin-right: 10px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--primary-color);
}

.label-bn {
    display: block;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 8px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ef;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(0, 85, 170, 0.1);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.radio-option {
    flex: 1;
    min-width: 130px;
}

.radio-option input {
    display: none;
}

.radio-option label {
    display: block;
    padding: 12px;
    border: 2px solid #e1e8ef;
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: white;
}

.radio-option input:checked + label {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 15px 35px;
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0, 51, 102, 0.3);
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 51, 102, 0.4);
}

.btn:active {
    transform: translateY(0);
}

.survey-step {
    display: none;
}

.survey-step.active {
    display: block;
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
        margin: 20px auto;
    }
    .card {
        padding: 25px;
    }
    h1 {
        font-size: 1.5rem;
    }
    .radio-option {
        min-width: 100%;
    }
}