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

:root {
    --primary-color: #1a472a;
    --secondary-color: #d4af37;
    --accent-color: #2d5a3d;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --border-color: #ddd;
    --success-color: #28a745;
    --hover-color: #1e3d26;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.header-content h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.header-content h2 {
    font-size: 1.3em;
    font-weight: 300;
    opacity: 0.95;
    margin-bottom: 20px;
}

.language-toggle {
    margin-top: 20px;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
    padding: 10px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.lang-btn:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.questionnaire-form {
    padding: 40px 30px;
}

.form-section {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

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

.form-section h3 {
    color: var(--primary-color);
    font-size: 1.5em;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--secondary-color);
    font-weight: 600;
}

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

.question-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
    font-size: 1.05em;
}

.question-group input[type="text"],
.question-group input[type="email"],
.question-group input[type="tel"],
.question-group input[type="date"],
.question-group textarea,
.question-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1em;
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
}

.question-group input:focus,
.question-group textarea:focus,
.question-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 71, 42, 0.1);
}

.question-group textarea {
    resize: vertical;
    min-height: 80px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-weight: 400;
    cursor: pointer;
    padding: 10px;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.checkbox-group label:hover {
    background-color: #f0f0f0;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.submit-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 3px solid var(--primary-color);
    text-align: center;
}

.submit-btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    border: none;
    padding: 15px 50px;
    font-size: 1.2em;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(26, 71, 42, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 71, 42, 0.4);
    background: linear-gradient(135deg, var(--hover-color) 0%, var(--primary-color) 100%);
}

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

.submit-note {
    margin-top: 15px;
    font-size: 0.9em;
    color: #666;
    font-style: italic;
}

.success-message {
    padding: 60px 30px;
    text-align: center;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-radius: 12px;
    margin: 20px;
}

.success-message h3 {
    color: var(--success-color);
    font-size: 2em;
    margin-bottom: 15px;
}

.success-message p {
    color: var(--text-color);
    font-size: 1.1em;
    line-height: 1.8;
}

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

    .header-content h1 {
        font-size: 1.8em;
    }

    .header-content h2 {
        font-size: 1.1em;
    }

    .questionnaire-form {
        padding: 25px 20px;
    }

    .form-section h3 {
        font-size: 1.3em;
    }

    .submit-btn {
        padding: 12px 40px;
        font-size: 1em;
        width: 100%;
    }
}

/* Loading state */
.submit-btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
    position: relative;
}

.submit-btn.loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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