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

/* Honeypot field - hidden from humans */
.honeypot-field {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-color: #f9fafb;
    --border-color: #e5e7eb;
    --white: #ffffff;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

/* Header */
.header {
    background-color: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Form Sections */
.questionnaire-form {
    background-color: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-section {
    margin-bottom: 50px;
    padding-bottom: 50px;
    border-bottom: 2px solid var(--border-color);
}

.form-section:last-of-type {
    border-bottom: none;
    margin-bottom: 30px;
}

.section-title {
    font-size: 1.875rem;
    color: var(--primary-color);
    margin-bottom: 30px;
    font-weight: 600;
}

/* Form Groups */
.form-group {
    margin-bottom: 25px;
}

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

label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.9375rem;
}

.required {
    color: var(--danger-color);
}

.hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-style: italic;
}

/* Input Styles */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: var(--white);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* Radio and Checkbox Groups */
.radio-group,
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 400;
}

.radio-label:hover,
.checkbox-label:hover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.02);
}

.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    margin-right: 12px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.radio-label:has(input:checked),
.checkbox-label:has(input:checked) {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.other-input {
    margin-top: 12px;
}

/* Buttons */
.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--border-color);
}

.btn {
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Success Message */
.success-message {
    background-color: var(--white);
    padding: 60px 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.success-content {
    max-width: 500px;
    margin: 0 auto;
}

.success-icon {
    width: 80px;
    height: 80px;
    background-color: var(--success-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto 30px;
    font-weight: bold;
}

.success-message h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.success-message p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

/* Loading State */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 3px solid var(--white);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .questionnaire-form {
        padding: 30px 20px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.25rem;
    }
}