:root {
    --bg: #f6f7f9;
    --fg: #1f2328;
    --muted: #6a737d;
    --border: #d0d7de;
    --card: #ffffff;
    --accent: #1f6feb;
    --accent-fg: #ffffff;
    --danger: #cf222e;
    --warn: #fff8c5;
    --row-zero: #fff5f5;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); }

/* --- Login --- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px 32px;
    width: 320px;
    box-shadow: 0 4px 12px rgba(0,0,0,.05);
}
.login-box h1 { margin: 0 0 16px; text-align: center; }
.login-box label { display: block; margin-bottom: 12px; }
.login-box input { width: 100%; }
.login-box button { width: 100%; }
.err { color: var(--danger); margin: 0 0 12px; }

/* --- Top bar --- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
}
.topbar h1 { margin: 0; font-size: 20px; }
.topbar-right {
    display: flex; align-items: center; gap: 10px;
}
.topbar-right .logout {
    color: var(--muted); text-decoration: none; font-size: 13px;
}
.topbar-right .logout:hover { text-decoration: underline; }

main { padding: 20px 24px 60px; }

/* --- Inputs / buttons --- */
input, textarea, select, button {
    font: inherit;
}
input[type=text], input[type=number], input[type=password],
input[type=search], textarea {
    padding: 6px 9px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    outline: none;
}
input:focus, textarea:focus { border-color: var(--accent); }
textarea { width: 100%; resize: vertical; font-family: inherit; }

button {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
}
button:hover { background: #f3f4f6; }
button.primary {
    background: var(--accent); color: var(--accent-fg); border-color: var(--accent);
}
button.primary:hover { filter: brightness(1.05); }
button.danger {
    background: var(--danger); color: #fff; border-color: var(--danger);
}
button.icon { padding: 4px 8px; }

/* --- Table --- */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
th, td {
    padding: 9px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
th {
    background: #f0f3f6;
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    font-size: 13px;
}
th[data-sort]::after {
    content: " ↕"; color: var(--muted); font-weight: normal;
}
th[data-sort].asc::after  { content: " ↑"; color: var(--fg); }
th[data-sort].desc::after { content: " ↓"; color: var(--fg); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: #fafbfc; }
tr.zero { background: var(--row-zero); }
tr.zero td:nth-child(3) { color: var(--danger); font-weight: 600; }

td.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
th.num { text-align: right; }
td.updated { color: var(--muted); font-size: 12px; white-space: nowrap; }
td.actions {
    white-space: nowrap; display: flex; gap: 6px; justify-content: flex-end;
}
.actions-col { text-align: right; }

td.note { color: var(--muted); font-size: 13px; }

/* inline quick-edit */
.quick-edit { display: inline-flex; gap: 4px; align-items: center; }
.quick-edit input {
    width: 80px; text-align: right; padding: 2px 6px;
}

/* --- Modal --- */
.modal {
    position: fixed; inset: 0;
    background: rgba(20, 25, 30, .45);
    display: flex; align-items: center; justify-content: center;
    z-index: 100; padding: 16px;
}
.modal[hidden] { display: none; }
.modal-box {
    background: var(--card);
    border-radius: 10px;
    padding: 24px;
    width: 460px; max-width: 100%;
    box-shadow: 0 8px 24px rgba(0,0,0,.18);
    display: flex; flex-direction: column; gap: 12px;
}
.modal-box h2 { margin: 0 0 4px; }
.modal-box label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.modal-box label input, .modal-box label textarea { color: var(--fg); }
.modal-box .row { display: flex; gap: 12px; }
.modal-box .row .grow { flex: 1; }
.modal-box .form-actions { display: flex; gap: 8px; margin-top: 8px; }
.modal-box .form-actions .spacer { flex: 1; }
.form-err { color: var(--danger); margin: 0; }

/* --- Mobile: turn rows into cards --- */
@media (max-width: 720px) {
    table, thead, tbody, th, td, tr { display: block; }
    thead { display: none; }
    tbody tr {
        border: 1px solid var(--border);
        border-radius: 8px;
        margin-bottom: 10px;
        padding: 8px;
        background: var(--card);
    }
    tbody tr td {
        border: none;
        padding: 4px 6px;
        display: flex;
        justify-content: space-between;
        gap: 12px;
    }
    tbody tr td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--muted);
        flex-shrink: 0;
    }
    td.actions { justify-content: flex-end; }
    td.actions::before { display: none; }
}