:root {
    --color-bg: #fff;
    --color-text: #1a1a1a;
    --color-border: #ddd;
    --color-primary: #a8632c;
    --color-primary-text: #fff;
    --color-danger: #b3261e;
    --color-muted: #666;
    --color-card-bg: #f7f4f0;
    --color-alert-info-bg: #eef2ff;
    --color-alert-error-bg: #fdecea;
    --color-alert-success-bg: #eaf6ec;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #17140f;
        --color-text: #f0ece5;
        --color-border: #3a352c;
        --color-primary: #d98a4a;
        --color-primary-text: #1a1a1a;
        --color-danger: #ff6b60;
        --color-muted: #b3ab9c;
        --color-card-bg: #221d16;
        --color-alert-info-bg: #1e2233;
        --color-alert-error-bg: #331e1c;
        --color-alert-success-bg: #1c2e20;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem 1.25rem 3rem;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.nav-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
}

.nav-links a:hover {
    text-decoration: underline;
}

h1, h2 { line-height: 1.25; }

.card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    max-width: 480px;
}

.form label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.95rem;
}

.form label.checkbox {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
}

input, select, textarea, button {
    font: inherit;
}

input[type="text"], input[type="email"], input[type="password"],
input[type="date"], input[type="time"], input[type="number"],
select, textarea {
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-bg);
    color: var(--color-text);
    width: 100%;
}

button, .btn {
    display: inline-block;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 6px;
    background: var(--color-primary);
    color: var(--color-primary-text);
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
    width: fit-content;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.inline-form {
    display: inline-block;
    margin-top: 0.5rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert ul { margin: 0; padding-left: 1.2rem; }

.alert-error { background: var(--color-alert-error-bg); }
.alert-success { background: var(--color-alert-success-bg); }
.alert-info { background: var(--color-alert-info-bg); }

.hint {
    font-size: 0.85rem;
    color: var(--color-muted);
    margin-top: -0.5rem;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

.table th, .table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

@media (max-width: 600px) {
    .nav { flex-direction: column; align-items: flex-start; }
}