:root {
    --ink: #172033;
    --muted: #667085;
    --line: #d9dee8;
    --bg: #f6f8fb;
    --panel: #ffffff;
    --blue: #0f5e9c;
    --green: #dff3d5;
    --cyan: #d9f1fb;
    --peach: #f8ddcc;
    --yellow: #fff0b8;
    --pink: #ffe1e7;
    --danger: #b42318;
    --ok: #137333;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family: "Segoe UI", system-ui, sans-serif;
}

.container {
    width: 100%;
    max-width: 1760px;
    margin: 0 auto;
    padding: 16px 20px;
}

.site-header,
.site-footer {
    background: var(--panel);
    border-bottom: 1px solid var(--line);
}

.site-footer { border-top: 1px solid var(--line); border-bottom: 0; margin-top: 24px; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { color: var(--blue); font-weight: 800; text-decoration: none; font-size: 20px; }
.nav { display: flex; gap: 14px; flex-wrap: wrap; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 600; }
.nav a:hover { color: var(--blue); }

h1 { margin: 8px 0 16px; font-size: 28px; }
h2 { margin: 0 0 12px; font-size: 18px; }
h3 { margin: 18px 0 8px; font-size: 15px; }

.panel,
.login-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}

.login-card { max-width: 420px; margin: 40px auto; }
.form-grid { display: grid; gap: 12px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }

label { display: grid; gap: 5px; font-size: 13px; font-weight: 700; color: #344054; }
input, select, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 9px 10px;
    font: inherit;
    background: #fff;
}
input[type="number"],
input[inputmode="decimal"] { text-align: right; }
textarea { min-height: 76px; resize: vertical; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 13px;
    border: 0;
    border-radius: 6px;
    color: #fff;
    background: var(--blue);
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}
.btn.secondary { background: #475467; }
.btn.ghost { background: transparent; color: var(--blue); border: 1px solid var(--blue); }
.btn.small { min-height: 30px; padding: 5px 9px; font-size: 12px; }

.notice { padding: 10px 12px; border-radius: 6px; background: #eaf7ee; border: 1px solid #b7dfc1; color: #14532d; margin-bottom: 12px; }
.notice.error { background: #ffebe9; border-color: #f6b4ad; color: var(--danger); }
.muted { color: var(--muted); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { border: 1px solid var(--line); padding: 7px 8px; vertical-align: middle; }
th { background: #eef2f7; text-align: left; }
td.num, th.num { text-align: right; }
.sheet th { color: #111827; text-align: center; line-height: 1.05; }
.sheet td { white-space: nowrap; }
.col-date { background: #f8fbff; }
.col-sales { background: var(--cyan); }
.col-card { background: var(--green); }
.col-expense { background: var(--peach); }
.col-cash { background: var(--yellow); }
.col-warn { background: var(--pink); }
.diff-negative { color: var(--danger); font-weight: 800; }
.diff-positive { color: var(--ok); font-weight: 800; }
.diff-zero { color: var(--ink); font-weight: 800; }

.mini-table input,
.mini-table select { min-width: 120px; padding: 6px 7px; }
.mini-table .concept { min-width: 220px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.collect-form { display: grid; grid-template-columns: 140px 130px minmax(140px, 1fr) auto; gap: 6px; align-items: center; min-width: 520px; }
.collect-form input,
.collect-form select { padding: 6px 7px; }
.calc-strip { display: grid; grid-template-columns: repeat(7, minmax(120px, 1fr)); gap: 8px; }
.calc-box { border: 1px solid var(--line); border-radius: 6px; padding: 10px; background: #fbfcff; }
.calc-box strong { display: block; font-size: 18px; margin-top: 4px; }
.summary-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
.metric { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 14px; }
.metric span { color: var(--muted); font-weight: 700; font-size: 12px; }
.metric strong { display: block; margin-top: 4px; font-size: 22px; }

@media (max-width: 1100px) {
    .grid-4, .grid-5, .summary-grid, .calc-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
    .container { padding: 12px; }
    .grid-4, .grid-5, .summary-grid, .calc-strip { grid-template-columns: 1fr; }
    .header-row { align-items: flex-start; flex-direction: column; }
}