/* ===== Theme tokens ===== */
:root {
    --accent: #c62828;
    --bg: #f4f5f7;
    --surface: #ffffff;
    --surface-2: #f8f9fb;
    --text: #1d2330;
    --muted: #6b7280;
    --border: #e2e5ea;
    --input-bg: #ffffff;
    --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
    --success: #1f8a4c;
    --success-bg: #e6f6ec;
    --danger: #c0262d;
    --danger-bg: #fdecec;
    --warn: #a15c00;
    --warn-bg: #fff4e0;
    --info: #1d5fbf;
    --info-bg: #e8f0fd;
    --radius: 10px;
    color-scheme: light;
}

[data-theme="dark"] {
    --bg: #0f1218;
    --surface: #181c24;
    --surface-2: #1f2430;
    --text: #e6e8ec;
    --muted: #9aa3b2;
    --border: #2c3240;
    --input-bg: #11151c;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    --success: #4cc283;
    --success-bg: #12301f;
    --danger: #ff6b6b;
    --danger-bg: #3a1618;
    --warn: #f0b04a;
    --warn-bg: #3a2a10;
    --info: #6aa5ff;
    --info-bg: #142540;
    color-scheme: dark;
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .75rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
hr { border: 0; border-top: 1px solid var(--border); margin: 1rem 0; }
code { background: var(--surface-2); padding: .1em .35em; border-radius: 4px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
.num { text-align: right; white-space: nowrap; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
    padding: .55rem 1rem; border-radius: 8px; border: 1px solid var(--border);
    background: var(--surface); color: var(--text); font: inherit; font-weight: 500;
    cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent); filter: brightness(1.08); }
.btn-danger { color: var(--danger); border-color: var(--danger); background: transparent; }
.btn-danger:hover { background: var(--danger-bg); }
.btn-sm { padding: .3rem .6rem; font-size: .85rem; }
.btn-lg { padding: .8rem 1.6rem; font-size: 1.05rem; }
.btn-block { width: 100%; }
.icon-btn {
    background: transparent; border: 1px solid transparent; color: var(--text);
    border-radius: 6px; padding: .3rem .5rem; cursor: pointer; font-size: 1rem; line-height: 1;
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--border); }
.icon-btn.danger { color: var(--danger); }
button.link { background: none; border: 0; color: var(--muted); cursor: pointer; padding: 0; font: inherit; }
button.link:hover { color: var(--text); }
.theme-icon::before { content: "☾"; }
[data-theme="dark"] .theme-icon::before { content: "☀"; }

/* ===== Forms ===== */
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date],
input[type=search], input:not([type]), select, textarea {
    width: 100%; padding: .55rem .7rem; font: inherit; color: var(--text);
    background: var(--input-bg); border: 1px solid var(--border); border-radius: 8px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input[type=color] { width: 70px; height: 40px; padding: 2px; border: 1px solid var(--border); border-radius: 8px; background: var(--input-bg); }
textarea { resize: vertical; }
.form label, .form .field { display: flex; flex-direction: column; gap: .3rem; margin-bottom: .9rem; font-weight: 500; font-size: .9rem; }
.form label small, .form .field small { font-weight: 400; }
.form label.check, label.check { flex-direction: row; align-items: center; gap: .5rem; font-weight: 400; }
.form h2 { margin-top: 1.25rem; }
.form h2:first-of-type { margin-top: 0; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0 1rem; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid-1 { display: grid; gap: 0; }
.form.compact label { margin-bottom: .6rem; }
.field-label { font-weight: 500; }
.inline-form { display: flex; gap: .4rem; align-items: center; flex-wrap: wrap; }
.inline-form input { width: auto; flex: 1 1 140px; }
input.tiny, .inline-form input.tiny { width: 80px; flex: 0 0 80px; }
.small-input { max-width: 150px; padding: .3rem .5rem !important; font-size: .85rem !important; }
label.inline { display: inline-flex; align-items: center; gap: .4rem; font-size: .9rem; }
label.inline input { width: auto; }
.checklist { list-style: none; padding: 0; margin: 0 0 1rem; }
.checklist .ok { color: var(--success); }
.checklist .bad { color: var(--danger); font-weight: 600; }

/* ===== Cards, alerts, layout helpers ===== */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.25rem; margin-bottom: 1.25rem; }
.card.narrow { max-width: 440px; margin: 2rem auto; }
.narrow-left { max-width: 520px; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: .75rem; }
.card-head h2 { margin: 0; }
.inline-controls { display: flex; gap: .5rem; }
.inline-controls select { width: auto; }
.alert { padding: .75rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid transparent; }
.alert-success { background: var(--success-bg); color: var(--success); border-color: var(--success); }
.alert-error { background: var(--danger-bg); color: var(--danger); border-color: var(--danger); }
.alert-info { background: var(--info-bg); color: var(--info); border-color: var(--info); }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: .75rem; flex-wrap: wrap; margin-bottom: 1rem; }
.toolbar-left, .toolbar-right { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.toolbar > p { margin: 0; flex: 1 1 400px; }
.filters { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.filters input[type=search] { width: 260px; }
.filters select { width: auto; }
.sticky-actions { position: sticky; bottom: 0; background: var(--bg); padding: .75rem 0; justify-content: flex-end; border-top: 1px solid var(--border); z-index: 5; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }
.grid-2.wide-left { grid-template-columns: 3fr 2fr; }
.grid-2.wide-right { grid-template-columns: minmax(280px, 1fr) 2fr; }
.stack { display: flex; flex-direction: column; gap: .5rem; }
.subnav { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.subnav a { padding: .35rem .8rem; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--text); font-size: .9rem; }
.logo-preview { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: .75rem; display: inline-block; max-width: 280px; }
.logo-preview img { max-width: 100%; max-height: 90px; display: block; }

/* ===== Stats ===== */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; box-shadow: var(--shadow); border-left: 4px solid var(--accent); }
.stat-danger { border-left-color: var(--danger); }
.stat-success { border-left-color: var(--success); }
.stat-label { color: var(--muted); font-size: .85rem; }
.stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-inline { font-size: 1rem; }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: .6rem .7rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.table th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
.table th.num, .table td.num { text-align: right; }
.table tbody tr:hover { background: var(--surface-2); }
.table tr.inactive td { opacity: .55; }
.table td.actions { display: flex; gap: .35rem; justify-content: flex-end; flex-wrap: wrap; }
.table td.actions form { margin: 0; }
.price-input { max-width: 140px; }
.pagination { display: flex; gap: .3rem; margin-top: 1rem; flex-wrap: wrap; }
.pagination a, .pagination span { padding: .3rem .65rem; border: 1px solid var(--border); border-radius: 6px; }
.pagination .current { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ===== Badges ===== */
.badge { display: inline-block; padding: .15rem .55rem; border-radius: 999px; font-size: .75rem; font-weight: 600; letter-spacing: .02em; }
.badge-draft { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.badge-sent { background: var(--info-bg); color: var(--info); }
.badge-partial { background: var(--warn-bg); color: var(--warn); }
.badge-paid { background: var(--success-bg); color: var(--success); }
.badge-overdue { background: var(--danger-bg); color: var(--danger); }
.badge-void { background: var(--surface-2); color: var(--muted); text-decoration: line-through; }

/* ===== Public site ===== */
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .75rem 1.5rem; background: var(--surface); border-bottom: 3px solid var(--accent); flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: .65rem; color: var(--text); font-weight: 700; font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand img { height: 40px; width: auto; max-width: 160px; object-fit: contain; }
.site-nav { display: flex; align-items: center; gap: 1rem; }
.site-nav form { margin: 0; }
.site-main { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.site-footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 2rem 1rem; }
.hero { text-align: center; padding: 3rem 1rem 2rem; max-width: 640px; margin: 0 auto; }
.hero-logo { max-height: 110px; max-width: 280px; margin-bottom: 1.25rem; }
.hero h1 { font-size: 2.1rem; }
.lead { font-size: 1.1rem; color: var(--muted); }
.hero-actions { margin: 1.5rem 0 1rem; }
.contact-strip { display: flex; justify-content: center; gap: 2.5rem; flex-wrap: wrap; padding: 1.5rem; border-top: 1px solid var(--border); }
.contact-strip .label, .doc-billto .label, .doc-notes .label { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
.portal-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.portal-head .stat { min-width: 220px; }

/* ===== Admin shell ===== */
.admin-shell { display: flex; min-height: 100vh; }
.sidebar { width: 240px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.sidebar .brand { padding: 1rem 1.1rem; border-bottom: 3px solid var(--accent); font-size: .95rem; }
.sidebar .brand img { height: 32px; }
.sidebar nav { display: flex; flex-direction: column; padding: .75rem .5rem; gap: 2px; flex: 1; }
.sidebar nav a, .sidebar-foot a { padding: .5rem .75rem; border-radius: 6px; color: var(--text); font-size: .93rem; }
.sidebar nav a:hover, .sidebar-foot a:hover { background: var(--surface-2); text-decoration: none; }
.sidebar nav a.active, .sidebar-foot a.active { background: var(--accent); color: #fff; }
.sidebar-foot { border-top: 1px solid var(--border); padding: .75rem .5rem; display: flex; flex-direction: column; gap: .25rem; }
.sidebar-foot form { padding: .25rem .75rem; margin: 0; }
.admin-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: .75rem; padding: .75rem 1.5rem; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.page-title { font-size: 1.2rem; margin: 0; flex: 1; }
.menu-btn { display: none; }
.content { padding: 1.5rem; max-width: 1400px; width: 100%; }

/* ===== Invoice editor ===== */
.items-table td { padding: .5rem .4rem; }
.items-table .col-product { min-width: 260px; }
.items-table .col-product select { margin-bottom: .35rem; }
.items-table .col-qty { width: 80px; }
.items-table .col-unit { width: 80px; }
.items-table .col-price { width: 120px; }
.items-table .col-tax { width: 150px; }
.items-table .col-total { width: 110px; padding-top: .9rem; font-weight: 600; }
.items-table .col-actions { width: 100px; white-space: nowrap; }
#add-item { margin-top: .5rem; }
.editor-bottom { display: grid; grid-template-columns: 1fr 340px; gap: 1.5rem; margin-top: 1.5rem; align-items: start; }
.totals-box { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; }
.totals-box .row { display: flex; justify-content: space-between; align-items: center; gap: .5rem; padding: .35rem 0; }
.totals-box .discount-row span:first-child { display: flex; align-items: center; gap: .35rem; }
.totals-box .discount-row select { width: auto; padding: .25rem .4rem; }
.totals-box .discount-row input { padding: .25rem .4rem; }
.totals-box .grand { border-top: 2px solid var(--border); margin-top: .35rem; padding-top: .6rem; font-size: 1.2rem; font-weight: 700; }

/* ===== Invoice view ===== */
.view-layout { display: grid; grid-template-columns: 1fr 320px; gap: 1.25rem; align-items: start; }
.view-side .card { padding: 1rem; }
.copy-field { display: flex; gap: .4rem; margin-bottom: .6rem; }
.copy-field input { font-size: .8rem; }
.payment-list { list-style: none; margin: 0 0 1rem; padding: 0; }
.payment-list li { display: flex; justify-content: space-between; align-items: flex-start; gap: .5rem; padding: .5rem 0; border-bottom: 1px solid var(--border); }
.payment-list form { margin: 0; }

/* ===== Invoice document (screen + print) ===== */
.paper { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 2.5rem; overflow-x: auto; }
.invoice-doc { position: relative; color: var(--text); font-size: 14px; min-width: 560px; }
.doc-head { display: flex; justify-content: space-between; gap: 2rem; padding-bottom: 1.25rem; border-bottom: 3px solid var(--accent); margin-bottom: 1.5rem; }
.doc-logo { max-height: 90px; max-width: 260px; display: block; margin-bottom: .6rem; }
.doc-company-name { font-size: 1.25rem; font-weight: 700; }
.doc-tagline { color: var(--muted); font-style: italic; margin-bottom: .3rem; }
.doc-small { font-size: .88rem; color: var(--muted); line-height: 1.5; }
.doc-meta { text-align: right; }
.doc-title { font-size: 1.8rem; font-weight: 800; letter-spacing: .04em; color: var(--accent); margin-bottom: .5rem; }
.meta-table { margin-left: auto; border-collapse: collapse; }
.meta-table th { text-align: left; color: var(--muted); font-weight: 500; padding: .15rem 1rem .15rem 0; }
.meta-table td { text-align: right; padding: .15rem 0; }
.doc-billto { margin-bottom: 1.5rem; }
.doc-customer-name { font-weight: 700; font-size: 1.05rem; }
.doc-items { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }
.doc-items th { background: var(--surface-2); text-align: left; font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding: .6rem .7rem; border-bottom: 2px solid var(--border); }
.doc-items td { padding: .65rem .7rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.doc-items .num { text-align: right; white-space: nowrap; }
.doc-items th.desc { width: 50%; }
.doc-bottom { display: flex; justify-content: space-between; gap: 2rem; align-items: flex-start; }
.doc-notes { flex: 1; }
.doc-notes .label { margin-top: .9rem; }
.doc-notes .label:first-child { margin-top: 0; }
.doc-totals { border-collapse: collapse; min-width: 290px; }
.doc-totals th { text-align: left; font-weight: 500; color: var(--muted); padding: .35rem 1.5rem .35rem 0; }
.doc-totals td { text-align: right; padding: .35rem 0; white-space: nowrap; }
.doc-totals .grand th, .doc-totals .grand td { border-top: 2px solid var(--text); font-weight: 700; color: var(--text); font-size: 1.05rem; padding-top: .55rem; }
.doc-totals .paid-row th, .doc-totals .paid-row td { color: var(--success); font-size: .9rem; }
.doc-totals .balance th, .doc-totals .balance td { background: var(--accent); color: #fff; font-weight: 700; padding: .55rem .7rem; font-size: 1.05rem; }
.doc-footer { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--border); text-align: center; font-size: .85rem; color: var(--muted); }
.stamp { position: absolute; top: 140px; right: 30%; transform: rotate(-18deg); font-size: 3.6rem; font-weight: 900; letter-spacing: .1em; padding: .1rem 1.2rem; border: 6px solid; border-radius: 12px; opacity: .22; pointer-events: none; }
.stamp-paid { color: var(--success); }
.stamp-void { color: var(--danger); }
.stamp-draft { color: var(--muted); }

/* ===== Responsive ===== */
@media (max-width: 1000px) {
    .view-layout, .grid-2, .grid-2.wide-left, .grid-2.wide-right, .editor-bottom { grid-template-columns: 1fr; }
}
@media (max-width: 800px) {
    .menu-btn { display: inline-block; }
    .sidebar { position: fixed; left: 0; top: 0; z-index: 50; transform: translateX(-100%); transition: transform .2s; box-shadow: 0 0 30px rgba(0,0,0,.25); }
    body.sidebar-open .sidebar { transform: none; }
    .content { padding: 1rem; }
    .topbar { padding: .6rem 1rem; }
    .paper { padding: 1.25rem; }
    .filters input[type=search] { width: 100%; }
    .site-header { padding: .6rem 1rem; }
}

/* ===== Print: always light, only the invoice ===== */
@media print {
    :root, [data-theme="dark"] {
        --bg: #fff; --surface: #fff; --surface-2: #f3f4f6; --text: #111; --muted: #555;
        --border: #d4d7dd; --success: #1f8a4c; --danger: #c0262d;
        color-scheme: light;
    }
    @page { margin: 12mm; }
    body { background: #fff !important; color: #111 !important; font-size: 12px; }
    .no-print, .sidebar, .topbar, .site-header, .site-footer, .view-side, .alert { display: none !important; }
    .admin-shell, .admin-main { display: block; }
    .content, .site-main { padding: 0; max-width: none; }
    .view-layout { display: block; }
    .paper { border: 0; box-shadow: none; padding: 0; border-radius: 0; overflow: visible; background: #fff; }
    .invoice-doc { min-width: 0; }
    .doc-items tr, .doc-totals tr { page-break-inside: avoid; }
    .doc-items th, .doc-totals .balance th, .doc-totals .balance td { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .stamp { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    a { color: inherit; text-decoration: none; }
}