:root {
    --primary-color: #3aafa9;
    /* Teal */
    --primary-dark: #2b7a78;
    --secondary-color: #def2f1;
    /* Light Mint */
    --accent-color: #17252a;
    /* Dark text */
    --bg-color: #f4f9f9;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --required-color: #e74c3c;
    --success-color: #27ae60;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--accent-color);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--secondary-color);
}

.logo {
    max-width: 150px;
    margin-bottom: 10px;
    /* Placeholder style if image missing */
    /* background: #ddd; */
    /* min-height: 80px; */
    /* border-radius: 50%; */
}

h1 {
    color: var(--primary-dark);
    font-size: 1.8rem;
    margin-bottom: 5px;
}

h2 {
    color: var(--primary-dark);
    font-size: 1.2rem;
    margin-bottom: 15px;
    border-left: 4px solid var(--primary-color);
    padding-left: 10px;
}

.form-section {
    background: var(--white);
    margin-bottom: 25px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.section-note {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 10px;
    font-style: italic;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

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

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    transition: border 0.3s;
}

textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    transition: border 0.3s;
    font-family: inherit;
    resize: vertical;
}

input:focus,
textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(58, 175, 169, 0.2);
}

/* Radio Cards (Attendee Status) */
.radio-group {
    display: flex;
    gap: 15px;
}

.radio-card {
    flex: 1;
    cursor: pointer;
    position: relative;
}

.radio-card input {
    position: absolute;
    opacity: 0;
}

.card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s;
    background: #fafafa;
}

.radio-card input:checked+.card-content {
    border-color: var(--primary-color);
    background: var(--secondary-color);
    color: var(--primary-dark);
    font-weight: bold;
}

.card-content .title {
    font-size: 1.1rem;
}

.card-content .price {
    font-size: 0.9rem;
    color: #555;
}

/* Checkbox Pills (Children) */
.checkbox-group,
.payment-methods {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.checkbox-pill,
.radio-pill {
    cursor: pointer;
}

.checkbox-pill input,
.radio-pill input {
    display: none;
}

.checkbox-pill span,
.radio-pill span {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid #ccc;
    border-radius: 20px;
    transition: 0.2s;
    font-size: 0.95rem;
}

.checkbox-pill input:checked+span,
.radio-pill input:checked+span {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* T-Shirt Grid */
.size-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 10px;
}

.size-box {
    cursor: pointer;
}

.size-box input {
    display: none;
}

.size-box span {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-weight: bold;
    transition: 0.2s;
}

.size-box.special span {
    background-color: #fff0f0;
    border-color: #ffcccc;
}

.size-box input:checked+span {
    background-color: var(--primary-dark);
    color: white;
    border-color: var(--primary-dark);
}

.size-box.special input:checked+span {
    background-color: #e91e63;
    border-color: #d81b60;
}

/* Deposit Summary */
.deposit-summary {
    background: var(--secondary-color);
    padding: 20px;
    border-radius: 8px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 1rem;
}

.summary-row.total {
    margin-top: 15px;
    padding-top: 10px;
    border-top: 1px solid #bdc3c7;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-dark);
}

.btn-submit {
    display: block;
    width: 100%;
    padding: 15px;
    font-size: 1.2rem;
    color: white;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

.btn-submit:hover {
    background-color: var(--primary-dark);
}

.footer {
    text-align: center;
    margin-top: 30px;
    color: #888;
    font-size: 0.85rem;
}

/* Validation Error state */
input.invalid,
textarea.invalid {
    border-color: var(--required-color);
}

@media (max-width: 500px) {
    .radio-group {
        flex-direction: column;
    }
}