:root {
    --color-bg: #f5f5f5;
    --color-card: #ffffff;
    --color-text: #1a1a1a;
    --color-muted: #666666;
    --color-primary: #d62828;
    --color-primary-hover: #b51f1f;
    --color-success: #2a9d8f;
    --color-success-bg: #e6f4f1;
    --color-error: #e63946;
    --color-error-bg: #fde8ea;
    --color-border: #dddddd;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 32px 16px;
}

.header {
    text-align: center;
    margin-bottom: 24px;
}

.header h1 {
    margin: 0 0 8px;
    font-size: 1.75rem;
    color: var(--color-primary);
}

.subtitle {
    margin: 0;
    color: var(--color-muted);
}

.card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}

input[type="text"],
input[type="number"],
input[type="tel"],
select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    background-color: #fff;
    transition: border-color 0.15s;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.15s;
}

.btn-primary {
    width: 100%;
    background-color: var(--color-primary);
    color: #fff;
}

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

.alert {
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: var(--color-success-bg);
    color: #1a5e56;
}

.alert-error {
    background-color: var(--color-error-bg);
    color: #8b1c24;
}

.alert ul {
    margin: 8px 0 0;
    padding-left: 20px;
}

.alert p {
    margin: 4px 0 0;
}

.footer {
    text-align: center;
    margin-top: 24px;
}

.footer a {
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}