:root {
    color-scheme: light dark;
    --bg: #f5f6f8;
    --card: #ffffff;
    --text: #1c1e21;
    --muted: #6b7280;
    --border: #e5e7eb;
    --accent: #2563eb;
    --accent-dark: #1d4ed8;
    --green: #16a34a;
    --red: #dc2626;
    --fn: #2563eb;
    --ati: #d97706;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161a;
        --card: #1d2026;
        --text: #e6e8eb;
        --muted: #9aa1ac;
        --border: #2c3038;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 64px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.topbar h1 { font-size: 22px; margin: 0; }

.btn-cancel {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
}
.btn-cancel:hover { background: var(--border); }

.month-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}
.month-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    font-size: 16px;
}
.month-arrow:hover { background: var(--border); }
.month-current {
    font-size: 16px;
    font-weight: 600;
    min-width: 160px;
    text-align: center;
}
.month-today { font-size: 12px; padding: 6px 10px; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}
.card h2 { margin-top: 0; font-size: 16px; }

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}
.stat {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.stat.highlight { border-color: var(--accent); }
.stat-label { font-size: 12px; color: var(--muted); }
.stat-value { font-size: 20px; font-weight: 600; }

.balance-card { text-align: center; }
.balance-card.balanced { border-color: var(--green); }
.balance-text { margin: 0; font-size: 16px; }
.balance-text .amount { font-size: 18px; color: var(--accent-dark); }
.balance-text .amount small { font-size: 12px; font-weight: 400; color: var(--muted); }
.balance-note { margin: 10px 0 0; font-size: 12px; color: var(--muted); }

.calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    align-items: end;
}
.calc-grid label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 13px;
    color: var(--muted);
}
.calc-grid input, .calc-grid select {
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}
.calc-result {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.order-form .grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}
.order-form label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 13px;
    color: var(--muted);
}
.order-form .col-2 { grid-column: span 3; }
.order-form input, .order-form select {
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}
.form-actions {
    margin-top: 16px;
    display: flex;
    gap: 10px;
}
button {
    cursor: pointer;
    border: none;
    background: var(--accent);
    color: #fff;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
}
button:hover { background: var(--accent-dark); }

.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td {
    text-align: left;
    padding: 10px 8px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
th { color: var(--muted); font-weight: 600; }
td.neg { color: var(--red); }
td small { color: var(--muted); }
.empty { color: var(--muted); }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
}
.badge-fn { background: var(--fn); }
.badge-ati { background: var(--ati); }

.row-actions { display: flex; gap: 8px; align-items: center; }
.row-actions form { margin: 0; }
.row-actions button {
    background: none;
    padding: 2px 4px;
    font-size: 14px;
}
.row-actions a { text-decoration: none; }

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 320px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.login-card h1 { font-size: 18px; margin: 0 0 4px; text-align: center; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.login-card input {
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
}
.error { color: var(--red); font-size: 13px; margin: 0; }

@media (max-width: 640px) {
    .order-form .grid { grid-template-columns: 1fr 1fr; }
    .order-form .col-2 { grid-column: span 2; }
    .calc-grid { grid-template-columns: 1fr 1fr; }
}