* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    min-height: 100vh;
    color: #2c3e50;
}
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 20px;
}
.header {
    text-align: center;
    padding: 30px 20px 20px;
}
.header img {
    max-width: 280px;
    height: auto;
    margin-bottom: 16px;
}
.header h1 {
    font-size: 1.6rem;
    color: #2c3e50;
    margin-bottom: 4px;
}
.header h2 {
    font-size: 1.1rem;
    color: #6b4c9a;
    font-weight: 400;
}
.header-link {
    margin-top: 8px;
    font-size: 0.9rem;
}
.header-link a {
    color: #6b4c9a;
    text-decoration: none;
    font-weight: 600;
}
.card {
    background: white;
    border-radius: 12px;
    padding: 28px 32px;
    margin-bottom: 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.card h3 {
    font-size: 1.15rem;
    color: #6b4c9a;
    margin-bottom: 6px;
}
.card p.subtitle {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 18px;
}
.intro-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #555;
}
.intro-text ul { margin: 10px 0 0 20px; }
.intro-text li { margin-bottom: 2px; }

.field { margin-bottom: 16px; }
.field label {
    display: block;
    font-weight: 600;
    font-size: 0.92rem;
    margin-bottom: 6px;
    color: #2c3e50;
}
.field label .req { color: #e74c3c; }
.field input[type="text"],
.field input[type="email"],
.field select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid #dce1e8;
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
    outline: none;
}
.field input:focus, .field select:focus {
    border-color: #6b4c9a;
}

.dimension-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #6b4c9a;
    margin-bottom: 4px;
}
.dimension-subtitle {
    font-size: 0.85rem;
    color: #95a5a6;
    margin-bottom: 14px;
}
.likert-item {
    margin-bottom: 14px;
    padding: 12px 14px;
    background: #f9fafb;
    border-radius: 8px;
}
.likert-item .question {
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: #34495e;
}
.likert-options {
    display: flex;
    gap: 0;
    justify-content: space-between;
}
.likert-options label {
    flex: 1;
    text-align: center;
    cursor: pointer;
}
.likert-options input[type="radio"] {
    display: none;
}
.likert-options .option-btn {
    display: block;
    padding: 8px 4px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #7f8c8d;
    transition: all 0.2s;
    border: 1.5px solid transparent;
}
.likert-options input[type="radio"]:checked + .option-btn {
    background: #6b4c9a;
    color: white;
    border-color: #6b4c9a;
}
.likert-options label:hover .option-btn {
    background: #eee8f5;
    color: #6b4c9a;
}
.scale-legend {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: #95a5a6;
    padding: 0 4px;
    margin-bottom: 16px;
}

.radio-group { margin-bottom: 16px; }
.radio-group label.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.92rem;
    transition: background 0.15s;
}
.radio-group label.radio-label:hover { background: #f0ebf5; }
.radio-group input[type="radio"] {
    accent-color: #6b4c9a;
    width: 16px;
    height: 16px;
}

.submit-btn {
    display: block;
    width: 100%;
    padding: 14px;
    background: #6b4c9a;
    color: white;
    font-size: 1.05rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.2s;
}
.submit-btn:hover { background: #563d7c; }
.submit-btn:disabled {
    opacity: 0.72;
    cursor: not-allowed;
}

.footer {
    text-align: center;
    padding: 20px;
    font-size: 0.8rem;
    color: #95a5a6;
}

.field.error input,
.field.error select {
    border-color: #e74c3c;
}
.likert-item.error {
    border: 1.5px solid #e74c3c;
}

@media (max-width: 768px) {
    .container {
        padding: 14px;
    }

    .card {
        padding: 22px 18px;
    }

    .header h1 {
        font-size: 1.35rem;
    }
}

.success-card {
    border-top: 4px solid #6b4c9a;
}

.success-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 10px;
    color: #34495e;
    font-size: 0.92rem;
}

.success-actions {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.action-btn {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 8px;
    background: #6b4c9a;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.action-btn.secondary {
    background: #ecf0f5;
    color: #2c3e50;
}

.pdf-card h3 {
    margin-bottom: 2px;
}

.pdf-frame {
    width: 100%;
    min-height: 74vh;
    border: 1px solid #dce1e8;
    border-radius: 10px;
    background: #fff;
}