:root {
    --green: #0f8a4f;
    --green-dark: #0a6b3c;
    --green-soft: #e6f5ec;
    --red: #d64545;
    --red-soft: #fdecec;
    --amber: #b7791f;
    --amber-soft: #fdf3dc;
    --ink: #1c2a24;
    --muted: #6b7a73;
    --line: #e2e8e4;
    --bg: #f3f6f4;
    --card: #fff;
    --radius: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
}

a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; }
code { background: var(--bg); padding: 2px 6px; border-radius: 6px; font-size: 13px; }

/* ---------- Khung trang ---------- */
.topbar {
    display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
    padding: 10px 16px; background: var(--green); color: #fff;
}
.topbar a { color: #fff; }
.brand { font-weight: 700; font-size: 17px; }
.userbox { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.userbox .btn.ghost { color: #fff; border-color: rgba(255, 255, 255, .5); background: transparent; }

.nav {
    display: flex; gap: 4px; padding: 0 12px; overflow-x: auto;
    background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5;
}
.nav a {
    padding: 12px 14px; color: var(--muted); font-weight: 600; white-space: nowrap;
    border-bottom: 3px solid transparent;
}
/* Căn giữa menu; khi màn hình hẹp vẫn cuộn ngang được từ mục đầu tiên */
.nav a:first-child { margin-left: auto; }
.nav a:last-child { margin-right: auto; }
.nav a:hover { color: var(--ink); text-decoration: none; }
.nav a.active { color: var(--green-dark); border-bottom-color: var(--green); }

.container { max-width: 1100px; margin: 0 auto; padding: 20px 16px 48px; }

.card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 16px; margin-bottom: 16px;
}
.narrow-card { max-width: 640px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.grid2 > .card { margin-bottom: 0; }
.grid2 { margin-bottom: 16px; }

/* ---------- Số liệu ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat span { display: block; color: var(--muted); font-size: 13px; }
.stat b { font-size: 20px; }
.stat.main { background: var(--green); border-color: var(--green); color: #fff; }
.stat.main span { color: rgba(255, 255, 255, .85); }
.pos { color: var(--green-dark); }
.neg { color: var(--red); }
.muted { color: var(--muted); }
.small-text { font-size: 13px; }

/* ---------- Bảng ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 9px 10px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
tfoot th { border-top: 2px solid var(--line); border-bottom: 0; font-size: 14px; color: var(--ink); text-transform: none; }
.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
tr.inactive td { opacity: .55; }
table.plain td { padding: 7px 0; }
td.actions { white-space: nowrap; }
td.actions form, td form { display: inline-block; margin: 0; }
.matrix th, .matrix td { text-align: center; padding: 7px 6px; }
.matrix th:first-child, .matrix td:first-child { text-align: left; white-space: nowrap; }
.cell-ok { color: var(--green-dark); background: var(--green-soft); font-weight: 700; }
.cell-no { color: #b9c4be; }

/* ---------- Nhãn ---------- */
.badge {
    display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600;
    background: #edf1ef; color: var(--muted); white-space: nowrap;
}
.badge.ok { background: var(--green-soft); color: var(--green-dark); }
.badge.warn { background: var(--amber-soft); color: var(--amber); }
.badge.err { background: var(--red-soft); color: var(--red); }
.badge.role-admin { background: #e8eaf6; color: #3949ab; }
.badge.role-president { background: #fde8d7; color: #c2410c; }
.badge.role-vice { background: var(--amber-soft); color: var(--amber); }
.badge.role-member { background: var(--green-soft); color: var(--green-dark); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
.chip {
    display: inline-block; padding: 3px 10px; border-radius: 8px; font-size: 13px;
    background: #edf1ef; color: var(--ink); white-space: nowrap;
}
.chip.ok { background: var(--green-soft); color: var(--green-dark); font-weight: 600; }
.chip.level-moi, .chip.level-yeu { background: #eef2f7; }
.chip.level-tby, .chip.level-tb { background: #e3f2fd; }
.chip.level-tbk, .chip.level-kha { background: var(--amber-soft); }
.chip.level-gioi { background: #fde8d7; }

/* ---------- Form ---------- */
label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); }
input, select {
    display: block; width: 100%; margin-top: 4px; padding: 8px 10px;
    font: inherit; color: var(--ink); background: #fff;
    border: 1px solid #cdd6d1; border-radius: 8px;
}
input:focus, select:focus { outline: 2px solid var(--green); outline-offset: 0; border-color: var(--green); }
input[type="checkbox"] { display: inline-block; width: auto; margin: 0 6px 0 0; }
label.check { display: flex; align-items: center; font-weight: 400; color: var(--ink); }

.form-stack { display: grid; gap: 12px; max-width: 420px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.form-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.form-row label { flex: 1 1 150px; }
.form-row label.grow { flex: 3 1 260px; }
.form-actions { display: flex; gap: 8px; }
.danger-zone { margin-top: 16px; padding-top: 12px; border-top: 1px dashed var(--line); }

form.inline, .inline { display: flex; gap: 6px; align-items: center; flex-wrap: nowrap; }
.inline input, .toolbar input, .toolbar select { width: auto; margin-top: 0; }
input.narrow { width: 110px; text-align: right; }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; margin-bottom: 16px; }
form.toolbar { justify-content: flex-start; }

.btn {
    display: inline-block; padding: 8px 16px; border: 1px solid var(--green); border-radius: 8px;
    background: var(--green); color: #fff; font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--green-dark); border-color: var(--green-dark); text-decoration: none; }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.block { width: 100%; padding: 10px; }
.btn.ghost { background: #fff; color: var(--green-dark); border-color: #cdd6d1; }
.btn.ghost:hover { background: var(--bg); }
.btn.danger { color: var(--red); }
.btn.danger:hover { background: var(--red-soft); border-color: var(--red); }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: var(--green-soft); color: var(--green-dark); }
.alert.err { background: var(--red-soft); color: var(--red); }
.alert.warn { background: var(--amber-soft); color: var(--amber); }

/* ---------- Biểu đồ cột ---------- */
.chart { display: flex; gap: 10px; align-items: flex-end; height: 170px; }
.chart-col { flex: 1; display: flex; flex-direction: column; align-items: center; height: 100%; }
.chart-col small { color: var(--muted); margin-top: 4px; }
.bars { flex: 1; width: 100%; display: flex; gap: 3px; align-items: flex-end; justify-content: center; border-bottom: 1px solid var(--line); }
.bar { width: 40%; max-width: 22px; min-height: 2px; border-radius: 4px 4px 0 0; }
.bar.thu, .dot.thu { background: var(--green); }
.bar.chi, .dot.chi { background: #e58a3c; }
.legend { margin: 10px 0 0; font-size: 13px; color: var(--muted); }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin: 0 4px 0 10px; }
.dot:first-child { margin-left: 0; }

/* ---------- Đóng quỹ qua QR ---------- */
.qr-box { display: flex; justify-content: center; margin-bottom: 12px; color: var(--muted); }
.qr-box img { width: 240px; max-width: 100%; height: auto; image-rendering: pixelated; border: 1px solid var(--line); border-radius: 8px; }
.receipt-preview { max-width: 100%; max-height: 280px; border: 1px solid var(--line); border-radius: 8px; justify-self: start; }
.form-stack h2 { margin: 8px 0 0; }

/* ---------- Đăng nhập ---------- */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 16px;
    background: linear-gradient(160deg, var(--green) 0%, var(--green-dark) 100%); }
.login-card { width: 100%; max-width: 360px; display: grid; gap: 12px; padding: 28px 24px; text-align: center; margin: 0; }
.login-card label { text-align: left; }
.login-card h1 { margin: 0; }
.login-card p { margin: 0; }
.login-logo { font-size: 44px; line-height: 1; }

@media (max-width: 600px) {
    h1 { font-size: 19px; }
    .container { padding: 14px 10px 40px; }
    .card { padding: 12px; }
    .stat b { font-size: 17px; }
    .userbox a { display: none; }
}

@media print {
    .topbar, .nav, .toolbar, .btn { display: none !important; }
    body { background: #fff; }
    .card { border: 0; padding: 0; }
}