:root {
    --bg: #fff;
    --fg: #525252;
    --muted: #f6f6f6;
    --border: #e5e5e5;
}
* {
    box-sizing: border-box;
}
html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font: 14px/1.55 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
        Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}
a {
    color: inherit;
    text-decoration: none;
}
code,
kbd,
pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 24px;
}
.grid {
    display: grid;
    gap: 16px;
}
.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}
.navbar-inner {
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    font-weight: 800;
    letter-spacing: 0.2px;
}
.navlinks {
    display: flex;
    gap: 8px;
}
.navlink {
    padding: 8px 10px;
    border-radius: 10px;
}
.navlink[aria-current="page"] {
    background: var(--muted);
}

.btn {
    display: inline-flex;
    transition: all 0.2s;
    align-items: center;
    justify-content: center;
    height: 36px;
    min-width: 36px;
    padding: 0 12px;
    border: 1px solid var(--fg);
    background: var(--fg);
    color: var(--bg);
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.02s;
}
.btn-outline {
    background: transparent;
    color: var(--fg);
}
.btn-outline:hover {
    background: var(--muted);
}
.btn-ghost {
    border-color: transparent;
    background: transparent;
}
.btn-ghost:hover {
    background: var(--muted);
}

.input,
.textarea,
.select {
    width: 100%;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--fg);
    padding: 8px 10px;
    border-radius: 10px;
    outline: none;
}
.input:focus,
.textarea:focus,
.select:focus {
    border-color: var(--fg);
    box-shadow: 0 0 0 3px rgba(10, 10, 10, 0.08);
}

.card {
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--bg);
    overflow: hidden;
}
.card-head {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}
.card-body {
    padding: 16px;
}
.card-foot {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    background: var(--muted);
}
.badge {
    display: inline-flex;
    gap: 6px;
    justify-content: center;
    align-items: center;
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--muted);
    font-size: 12px;
}
.code {
    padding: 12px;
    background: var(--muted);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: auto;
}
.kbd {
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 6px;
    background: var(--muted);
    font-size: 12px;
}

.table {
    width: 100%;
    border-collapse: collapse;
}
.table th,
.table td {
    padding: 10px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.table thead th {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.muted {
    color: var(--muted-text);
}
.footer {
    border-top: 1px solid var(--border);
    padding: 24px;
    color: var(--fg);
}

.seg {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}
.seg-btn {
    padding: 6px 10px;
    border: 0;
    color: var(--fg);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s;
}
.seg-btn[aria-pressed="true"] {
    background: var(--muted);
    font-weight: 600;
}