:root {
    --primary-color: #3F7B6F;
    --primary-dark: #2D5A52;
    --primary-light: #B5D4CD;
    --secondary-color: #ff6f00;
    --text-color: #212121;
    --text-light: #757575;
    --bg-color: #f5f5f5;
    --white: #ffffff;
    --error-color: #d32f2f;
    --success-color: #3F7B6F;
    --info-color: #1976d2;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
}

.header {
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    margin-bottom: 20px;
}

.logo {
    max-width: 120px;
    height: auto;
    margin-bottom: 12px;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.site-id {
    font-size: 1.125rem;
    color: var(--text-light);
}

.site-id strong {
    color: var(--secondary-color);
    font-size: 1.25rem;
}

.alert {
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.alert i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.alert h3 {
    font-size: 1.125rem;
    margin-bottom: 4px;
}

.alert p {
    margin: 0;
}

.alert-error {
    background-color: #ffebee;
    color: var(--error-color);
    border-left: 4px solid var(--error-color);
}

.alert-success {
    background-color: #E8F1EE;
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-info {
    background-color: #e3f2fd;
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

.alert-reserved {
    background-color: var(--white);
    border: 2px solid var(--secondary-color);
    text-align: center;
    flex-direction: column;
}

.alert-reserved i {
    font-size: 3rem;
    color: var(--secondary-color);
}

.alert-reserved h3 {
    color: var(--secondary-color);
}

.form {
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.form-section {
    margin-bottom: 24px;
}

.form-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input::placeholder {
    color: #9e9e9e;
}

.signature-instruction {
    color: var(--text-light);
    margin-bottom: 12px;
    font-size: 0.875rem;
}

.signature-wrapper {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    background: var(--white);
}

.signature-wrapper canvas {
    width: 100%;
    height: 200px;
    display: block;
    cursor: crosshair;
    border-radius: var(--radius);
}

.btn-clear {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px 12px;
    font-size: 0.875rem;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background 0.2s, color 0.2s;
}

.btn-clear:hover {
    background: var(--bg-color);
    color: var(--error-color);
}

.form-actions {
    margin-top: 24px;
}

.btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-checkout {
    background: var(--secondary-color);
    color: var(--white);
}

.btn-checkout:hover {
    background: #D5651B;
}

.btn-loading {
    display: none;
}

.btn.submitted .btn-text {
    display: none;
}

.btn.submitted .btn-loading {
    display: inline-flex;
}

.spinning {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.footer {
    margin-top: 20px;
    text-align: center;
}

.footer a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.875rem;
}

.footer a:hover {
    color: var(--primary-color);
}

@media (min-width: 480px) {
    .container {
        padding: 24px;
    }
    
    .header {
        padding: 24px;
    }
    
    .header h1 {
        font-size: 1.75rem;
    }
    
    .form {
        padding: 24px;
    }
    
    .signature-wrapper canvas {
        height: 250px;
    }
}

@media (min-width: 768px) {
    .container {
        max-width: 600px;
        margin: 24px auto;
        padding: 24px;
    }
    
    .header {
        padding: 28px;
    }
    
    .form {
        padding: 28px;
    }
}