@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f0f2f5;
    --form-bg-color: #ffffff;
    --text-color: #333;
    --border-color: #ced4da;
    --success-color: #28a745;
    --error-color: #dc3545;
    --animation-duration: 0.5s;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: var(--form-bg-color);
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 800px;
    animation: fadeIn var(--animation-duration) ease-out;
}

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

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 15px;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 5px;
    font-weight: 700;
    animation: slideDown 0.7s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hosted-by {
    font-size: 0.9em;
    color: var(--secondary-color);
    font-style: italic;
}

.message {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    animation: popIn 0.3s ease-out;
}

@keyframes popIn {
    0% { opacity: 0; transform: scale(0.9); }
    80% { opacity: 1; transform: scale(1.05); }
    100% { opacity: 1; transform: scale(1); }
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

fieldset.form-section {
    border: 1px solid var(--border-color);
    padding: 20px;
    margin-bottom: 25px;
    border-radius: 8px;
    background-color: #fcfcfc;
    opacity: 0; /* Initially hidden for JS animation */
    transform: translateY(20px); /* Initially shifted for JS animation */
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

fieldset.form-section.visible {
    opacity: 1;
    transform: translateY(0);
}

fieldset legend {
    font-size: 1.4em;
    font-weight: 500;
    color: var(--primary-color);
    padding: 0 10px;
    margin-left: 10px;
    background-color: var(--form-bg-color); /* To cut through fieldset border */
}

.question, .question-group div.question {
    margin-bottom: 18px;
    padding-left: 10px;
}

.question p, .group-title {
    font-weight: 500;
    margin-bottom: 10px;
    color: #555;
}

.group-title {
    font-size: 1.1em;
    color: var(--primary-color);
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 5px;
    margin-top: 20px;
}

.question label {
    display: block;
    margin-bottom: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    padding: 8px;
    border-radius: 4px;
}

.question label:hover {
    background-color: #e9ecef;
}

.question input[type="checkbox"],
.question input[type="radio"] {
    margin-right: 10px;
    transform: scale(1.1);
    accent-color: var(--primary-color);
}

.question input[type="text"],
.question input[type="date"],
.question textarea {
    width: calc(100% - 22px);
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1em;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.question input[type="text"]:focus,
.question input[type="date"]:focus,
.question textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
    outline: none;
}

.question textarea {
    resize: vertical;
    min-height: 60px;
}

.explanation {
    font-size: 0.85em;
    color: var(--secondary-color);
    margin-left: 5px;
    font-style: italic;
}

.submit-btn {
    display: block;
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1.1em;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
    text-align: center;
    margin-top: 20px;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
}

.submit-btn:hover {
    background: linear-gradient(45deg, #0056b3, var(--primary-color));
    transform: translateY(-2px);
}

.submit-btn:active {
    transform: translateY(0px);
    box-shadow: 0 2px 5px rgba(0, 123, 255, 0.2);
}

.submit-btn .rocket {
    display: inline-block;
    animation: launch 1.5s infinite ease-in-out;
    margin-left: 8px;
}

@keyframes launch {
    0% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-3px) rotate(5deg); }
    50% { transform: translateY(0px) rotate(0deg); }
    75% { transform: translateY(-3px) rotate(-5deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9em;
    color: var(--secondary-color);
}