:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1d2330;
    --muted: #6b7280;
    --line: #e2e5ea;
    --accent: #1f5fbf;
    --error: #c62828;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14171c;
        --card: #1e232b;
        --text: #e8eaee;
        --muted: #9aa1ad;
        --line: #2d333d;
        --accent: #5b9cff;
        --error: #ff6b6b;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
    font-size: 16px;
}

.top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--card);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
}

.brand { font-weight: 700; }
.logout { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: 14px; }

.tabs { display: flex; background: var(--card); border-bottom: 1px solid var(--line); }
.tabs a { flex: 1; text-align: center; padding: 10px 0; color: var(--muted); text-decoration: none; border-bottom: 2px solid transparent; }
.tabs a.on { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

main { padding: 12px 16px 32px; max-width: 720px; margin: 0 auto; }

input, select, button {
    font: inherit;
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--card);
    color: var(--text);
}

.logout button { width: auto; padding: 4px 10px; font-size: 14px; }

button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 12px 14px;
}

.login { margin-top: 40px; display: grid; gap: 14px; }
.login h1 { margin: 0; font-size: 20px; }
.login label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.error { color: var(--error); margin: 0; font-size: 14px; }

.filters { display: grid; gap: 8px; }
.filters .row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.check { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }
.check input { width: auto; }

.summary { color: var(--muted); font-size: 14px; margin: 14px 2px 8px; }

.stock-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.stock-list .head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.stock-list .qty { font-weight: 700; color: var(--accent); white-space: nowrap; }
.stock-list .sub { color: var(--muted); font-size: 13px; margin-top: 2px; }
.stock-list dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 12px; margin: 8px 0 0; font-size: 14px; }
.stock-list dt { color: var(--muted); }
.stock-list dd { margin: 0; }