:root {
    --teal: #1b6f6a;
    --teal-light: #7ad1ca;
    --navy: #14364f;
    --ink: #1d2733;
    --muted: #6b7a89;
    --line: #dbe3ea;
    --bg: #eef2f6;
    --danger: #c0392b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
    font-size: 14px;
}

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

/* ---------- Top bar ---------- */
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 1px 3px rgba(20, 54, 79, .06);
}

.topbar-inner {
    max-width: 1140px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 28px;
}

.brand img { height: 54px; display: block; }

.nav { display: flex; gap: 6px; margin-right: auto; }

.nav a {
    padding: 8px 14px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--muted);
    font-weight: 600;
}

.nav a:hover { background: #f1f5f8; color: var(--navy); }
.nav a.active { background: var(--teal); color: #fff; }

.user-box { display: flex; align-items: center; gap: 12px; color: var(--muted); }

.container { max-width: 1140px; margin: 0 auto; padding: 24px 20px 60px; }

.site-footer {
    text-align: center;
    color: var(--muted);
    padding: 16px;
    font-size: 12px;
}

/* ---------- Page head ---------- */
.page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
    gap: 16px;
}

.page-head h1 { font-size: 22px; margin: 0; color: var(--navy); }

/* ---------- Cards ---------- */
.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.card > h2 {
    margin: 0 0 16px;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
}

/* ---------- Stats ---------- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat {
    background: #fff;
    border: 1px solid var(--line);
    border-left: 4px solid var(--teal);
    border-radius: 10px;
    padding: 16px 18px;
}

.stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.stat .value { font-size: 24px; font-weight: 700; color: var(--navy); margin-top: 6px; }

/* ---------- Forms ---------- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 16px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }

label { font-weight: 600; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

input, select, textarea {
    font: inherit;
    padding: 9px 11px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fff;
    color: var(--ink);
    width: 100%;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(27, 111, 106, .12);
}

textarea { resize: vertical; min-height: 72px; }

.form-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 9px 16px;
    border-radius: 6px;
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
}

.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: #14524e; }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--muted); }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }
.btn-danger { background: #fff; border-color: #f0c8c2; color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ---------- Tables ---------- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    overflow: hidden;
}

.data-table th {
    background: #f5f8fa;
    text-align: left;
    padding: 11px 14px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
    border-bottom: 1px solid var(--line);
}

.data-table td { padding: 11px 14px; border-bottom: 1px solid #eef2f5; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #fafcfd; }
.data-table .num { text-align: right; }
.data-table .actions { text-align: right; white-space: nowrap; }

.empty { text-align: center; color: var(--muted); padding: 40px 20px; }

/* ---------- Filtered totals bar ---------- */
.summary-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    padding: 14px 20px;
}

.summary-bar .label {
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.summary-bar .value { font-size: 17px; font-weight: 700; color: var(--navy); margin-top: 4px; }
.summary-bar .value.is-due { color: #8a5a12; }

/* ---------- Status badges ---------- */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font: 600 11px inherit;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: .05em;
    border: 1px solid transparent;
    cursor: pointer;
}

span.badge { cursor: default; }

.badge-paid { background: #e4f4ef; color: #14624f; border-color: #b9e2d6; }
.badge-paid:hover { background: #cfebe1; }
.badge-pending { background: #fdf1dc; color: #8a5a12; border-color: #f2dbb0; }
.badge-pending:hover { background: #f8e5c2; }
.badge-partial { background: #e7eefb; color: #1f4d8f; border-color: #c3d6f2; }
.badge-partial:hover { background: #d6e3f7; }

/* ---------- Alerts ---------- */
.alert { padding: 11px 15px; border-radius: 8px; margin-bottom: 18px; font-weight: 500; }
.alert-success { background: #e4f4ef; color: #14624f; border: 1px solid #b9e2d6; }
.alert-error { background: #fbeae8; color: #96271b; border: 1px solid #f0c8c2; }

/* ---------- Login ---------- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #14364f, #1b6f6a);
    padding: 20px;
}

.login-card {
    background: #fff;
    border-radius: 14px;
    padding: 34px 32px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, .25);
}

.login-card img { display: block; height: 68px; margin: 0 auto 14px; }
.login-card h1 { text-align: center; font-size: 17px; margin: 0 0 22px; color: var(--navy); }
.login-card .field { margin-bottom: 14px; }
.login-card .btn { width: 100%; margin-top: 6px; }
.login-hint { text-align: center; color: var(--muted); font-size: 12px; margin-top: 16px; }

/* ---------- Invoice line items editor ---------- */
.items-table { width: 100%; border-collapse: collapse; }
.items-table th {
    background: var(--teal-light);
    padding: 9px 8px;
    font-size: 12px;
    border: 1px solid #9fdcd6;
    color: #123f3c;
}
.items-table td { border: 1px solid var(--line); padding: 5px; }
.items-table input, .items-table select { border: none; padding: 6px; }
.items-table input:focus, .items-table select:focus { box-shadow: none; background: #f4fbfa; }
.items-table .col-sr { width: 42px; text-align: center; color: var(--muted); }
.items-table .col-num { width: 110px; }
.items-table .col-curr { width: 90px; }
.items-table .col-del { width: 44px; text-align: center; }
.items-table .readonly { background: #f7f9fb; text-align: right; font-weight: 600; }

.row-remove {
    border: none;
    background: none;
    color: var(--danger);
    font-size: 17px;
    cursor: pointer;
    line-height: 1;
}

.grand-line {
    display: flex;
    justify-content: flex-end;
    align-items: baseline;
    gap: 14px;
    margin-top: 16px;
    font-size: 17px;
    font-weight: 700;
    color: var(--navy);
}

.words-line { text-align: right; color: var(--muted); font-size: 12px; margin-top: 4px; font-style: italic; }

/* ---------- Modal ---------- */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(20, 54, 79, .45);
    z-index: 50;
    padding: 24px;
    overflow-y: auto;
}

.modal.is-open { display: flex; align-items: flex-start; justify-content: center; }

.modal-panel {
    background: #fff;
    border-radius: 12px;
    width: 100%;
    max-width: 620px;
    margin: auto;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .3);
}

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--line);
}

.modal-head h2 { margin: 0; font-size: 16px; color: var(--navy); }

.modal-close {
    border: none;
    background: none;
    font-size: 22px;
    line-height: 1;
    color: var(--muted);
    cursor: pointer;
    padding: 0 4px;
}

.modal-close:hover { color: var(--danger); }

.modal-body { padding: 22px; }

.modal-foot {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding: 16px 22px;
    border-top: 1px solid var(--line);
    background: #fafcfd;
    border-radius: 0 0 12px 12px;
}

/* ---------- Ledger ---------- */
.ledger-table .debit { color: var(--navy); }
.ledger-table .credit { color: #14624f; }
.ledger-table tr.opening td { background: #f5f8fa; font-weight: 600; }
.ledger-table tfoot td { border-top: 2px solid var(--line); font-weight: 700; background: #fafcfd; }

.profit-positive { color: #14624f; font-weight: 700; }
.profit-negative { color: var(--danger); font-weight: 700; }

/* ---------- Printing a ledger or report ---------- */
@media print {
    body { background: #fff; }
    .topbar, .site-footer, .no-print, .page-head .btn, .page-head button { display: none !important; }
    .container { max-width: none; padding: 0; }
    .card { border: none; box-shadow: none; padding: 0 0 18px; break-inside: avoid; }
    .data-table { border-color: #999; }
    .stat-grid { display: flex; gap: 14px; }
}