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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1em;
    opacity: 0.95;
}

.content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

@media (max-width: 1024px) {
    .content {
        grid-template-columns: 1fr;
    }
}

.rules-section, .form-section {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.rules-container {
    position: relative;
    width: 100%;
}

.rules-container iframe {
    border: 1px solid #ddd;
    border-radius: 5px;
}

.form-section h2 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.8em;
}

.form-intro {
    color: #666;
    margin-bottom: 25px;
    padding: 15px;
    background-color: #f8f9fa;
    border-left: 4px solid #667eea;
    border-radius: 4px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="date"],
.form-group input[type="number"],
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
}

.checkbox-group label {
    display: flex;
    align-items: flex-start;
    font-weight: normal;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 10px;
    margin-top: 4px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.button-group {
    margin-top: 30px;
}

.btn {
    padding: 14px 30px;
    border: none;
    border-radius: 6px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 6px;
    display: none;
}

.message.show {
    display: block;
}

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

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

.message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.warning-banner {
    margin-top: 10px;
    padding: 12px;
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    border-left: 4px solid #ffc107;
    border-radius: 4px;
    color: #856404;
    font-size: 0.95em;
}

.warning-banner strong {
    color: #856404;
}

.emergency-contact-section,
.additional-guest-section {
    margin: 25px 0;
    padding: 20px;
    background-color: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
}

.emergency-contact-section h3,
.additional-guest-section h3 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.3em;
    padding-bottom: 10px;
    border-bottom: 2px solid #667eea;
}

#additionalGuestsContainer {
    margin-top: 20px;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    header {
        padding: 20px 15px;
        margin-bottom: 15px;
        border-radius: 8px;
    }

    header h1 {
        font-size: 1.8em;
        margin-bottom: 8px;
    }

    header p {
        font-size: 0.95em;
    }

    .content {
        gap: 15px;
    }

    .rules-section, .form-section {
        padding: 15px;
    }

    .rules-container iframe {
        height: 400px;
    }

    .form-section h2 {
        font-size: 1.5em;
    }

    .form-intro {
        padding: 12px;
        font-size: 0.95em;
    }

    .form-group input[type="text"],
    .form-group input[type="email"],
    .form-group input[type="tel"],
    .form-group input[type="date"],
    .form-group input[type="number"],
    .form-group select {
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 14px 12px;
    }

    .form-group label {
        font-size: 0.95em;
    }

    .form-group small {
        font-size: 0.85em;
    }

    .btn {
        padding: 16px 20px;
        font-size: 1em;
    }

    .emergency-contact-section,
    .additional-guest-section {
        padding: 15px;
        margin: 15px 0;
    }

    .emergency-contact-section h3,
    .additional-guest-section h3 {
        font-size: 1.15em;
    }

    .message {
        padding: 12px;
        font-size: 0.95em;
    }

    .warning-banner {
        padding: 10px;
        font-size: 0.9em;
    }

    .checkbox-group label {
        font-size: 0.95em;
    }
}

/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 576px) {
    .container {
        padding: 8px;
    }

    header {
        padding: 15px 10px;
    }

    header h1 {
        font-size: 1.5em;
    }

    header p {
        font-size: 0.9em;
    }

    .rules-section, .form-section {
        padding: 12px;
    }

    .rules-container iframe {
        height: 350px;
    }

    .form-section h2 {
        font-size: 1.3em;
    }

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

    .btn {
        padding: 14px 16px;
        font-size: 0.95em;
    }
}