:root {
  color-scheme: light;
  --paper: #F7F5F0; --surface: #FFFFFF; --surface-2: #FBFAF6;
  --ink: #1B2430; --ink-soft: #5B6472; --ink-muted: #8A8F98;
  --line: #E2DFD6; --line-strong: #CFCBBE;
  --accent: #1B8A6B; --accent-ink: #FFFFFF; --accent-soft: #DDEEE8;
  --income: #1B8A6B; --expense: #D9622E; --expense-soft: #FBE7DA;
  --info: #3B6EA5; --info-soft: #DFEAF5;
  --danger: #B3452D; --danger-soft: #F6DFD7;
  --warning: #B8862B; --warning-soft: #F3E7D2;
  --draft: #8A8F98; --draft-soft: #E9E7E1;
  --shadow: 0 1px 2px rgba(27,36,48,0.06), 0 6px 20px rgba(27,36,48,0.06);
  --focus: #1B8A6B;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #14181B; --surface: #1B2023; --surface-2: #20262A;
    --ink: #ECE9E1; --ink-soft: #A7ADB3; --ink-muted: #767C82;
    --line: #2A3033; --line-strong: #383F43;
    --accent: #2FA684; --accent-ink: #08130F; --accent-soft: #1E332D;
    --income: #2FA684; --expense: #D9713E; --expense-soft: #3A2A1F;
    --info: #5C93C9; --info-soft: #1E2C3A;
    --danger: #E0685A; --danger-soft: #3A241F;
    --warning: #D9A544; --warning-soft: #3A2F1B;
    --draft: #8A9096; --draft-soft: #262B2E;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.35);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #14181B; --surface: #1B2023; --surface-2: #20262A;
  --ink: #ECE9E1; --ink-soft: #A7ADB3; --ink-muted: #767C82;
  --line: #2A3033; --line-strong: #383F43;
  --accent: #2FA684; --accent-ink: #08130F; --accent-soft: #1E332D;
  --income: #2FA684; --expense: #D9713E; --expense-soft: #3A2A1F;
  --info: #5C93C9; --info-soft: #1E2C3A;
  --danger: #E0685A; --danger-soft: #3A241F;
  --warning: #D9A544; --warning-soft: #3A2F1B;
  --draft: #8A9096; --draft-soft: #262B2E;
  --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--paper); color: var(--ink);
  font-family: "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px; line-height: 1.5; -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: "Source Serif 4", Georgia, serif; font-weight: 600; margin: 0; }
.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; font-variant-numeric: tabular-nums; }
a { color: var(--accent); }
button { font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

/* Sign-in screen */
.signin-screen { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.signin-card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); padding: 40px; width: 380px; max-width: 100%; text-align: center; }
.signin-card .brand-mark { font-family: "Source Serif 4", serif; font-weight: 700; font-size: 24px; margin-bottom: 4px; }
.signin-card p { color: var(--ink-muted); font-size: 13px; margin: 8px 0 24px; }
.signin-error { background: var(--danger-soft); color: var(--danger); border-radius: 8px; padding: 10px 14px; font-size: 12.5px; margin-top: 16px; text-align: left; }
.signin-divider { color: var(--ink-muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; margin: 18px 0 14px; position: relative; }
.signin-divider::before, .signin-divider::after { content: ""; display: inline-block; width: 32%; height: 1px; background: var(--line); vertical-align: middle; margin: 0 8px; }
.pending-note { background: var(--warning-soft); color: var(--warning); border-radius: 8px; padding: 10px 14px; font-size: 12.5px; margin-top: 16px; text-align: left; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 240px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--line); display: flex; flex-direction: column; padding: 18px 14px; gap: 2px; }
.brand { display: flex; align-items: baseline; gap: 8px; padding: 6px 10px 2px; }
.brand-mark { font-family: "Source Serif 4", serif; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }

.company-switch { display: flex; background: var(--surface-2); border: 1px solid var(--line); border-radius: 9px; padding: 3px; margin: 10px 0 14px; gap: 2px; }
.company-btn { flex: 1; border: none; background: none; padding: 7px 6px; border-radius: 7px; font-size: 11.5px; font-weight: 700; color: var(--ink-soft); cursor: pointer; text-align: center; }
.company-btn.active { background: var(--surface); color: var(--accent); box-shadow: var(--shadow); }

.nav-item { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 8px; color: var(--ink-soft); font-size: 13.5px; font-weight: 500; cursor: pointer; border: none; background: none; text-align: left; width: 100%; }
.nav-item:hover { background: var(--surface-2); color: var(--ink); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); }
.nav-item svg { flex-shrink: 0; }
.nav-item .badge-count { margin-left: auto; font-size: 10.5px; font-weight: 700; background: var(--danger-soft); color: var(--danger); padding: 1px 6px; border-radius: 10px; }
.nav-divider { height: 1px; background: var(--line); margin: 10px 4px; }
.nav-group-label { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-muted); font-weight: 700; padding: 4px 10px 2px; }
.nav-spacer { flex: 1; }
.sidebar-foot { border-top: 1px solid var(--line); padding-top: 10px; margin-top: 8px; display: flex; flex-direction: column; gap: 6px; }
.user-chip { display: flex; align-items: center; gap: 8px; padding: 6px 10px; font-size: 12.5px; }
.user-avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 11px; flex-shrink: 0; overflow: hidden; }
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-meta { min-width: 0; }
.user-meta .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-meta .role { color: var(--ink-muted); font-size: 11px; text-transform: capitalize; }

.main { flex: 1; min-width: 0; padding: 28px 36px 60px; max-width: 1180px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.topbar h1 { font-size: 22px; }
.topbar-sub { color: var(--ink-muted); font-size: 12.5px; margin-top: 3px; }
.topbar-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 7px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); font-size: 13px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--ink-muted); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(1.05); border-color: var(--accent); }
.btn-ghost { border-color: transparent; background: none; }
.btn-ghost:hover { background: var(--surface-2); border-color: transparent; }
.btn-danger { color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
.card-pad { padding: 18px 20px; }
.banner { border-radius: 10px; padding: 10px 14px; font-size: 13px; margin-bottom: 18px; display: flex; align-items: center; gap: 8px; }
.banner-info { background: var(--info-soft); color: var(--info); }
.banner-danger { background: var(--danger-soft); color: var(--danger); }
.banner-warning { background: var(--warning-soft); color: var(--warning); }

.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
.kpi-tile { padding: 16px 18px; }
.kpi-label { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-muted); font-weight: 600; }
.kpi-value { font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; font-size: 22px; font-weight: 600; margin-top: 8px; }
.kpi-sub { font-size: 12px; color: var(--ink-soft); margin-top: 4px; }
.kpi-value.c-expense { color: var(--expense); } .kpi-value.c-income { color: var(--income); } .kpi-value.c-danger { color: var(--danger); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-muted); font-weight: 600; padding: 10px 14px; border-bottom: 1px solid var(--line); white-space: nowrap; }
tbody td { padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
td.num, th.num { text-align: right; font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }
.row-link { cursor: pointer; }
.cell-primary { font-weight: 600; } .cell-muted { color: var(--ink-muted); }
.empty-state { padding: 48px 20px; text-align: center; color: var(--ink-muted); }
.empty-state h3 { color: var(--ink-soft); margin-bottom: 6px; font-size: 15px; }

.chip { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.chip::before { content: ""; width: 6px; height: 6px; border-radius: 50%; }
.chip-draft, .chip-open { background: var(--draft-soft); color: var(--ink-soft); } .chip-draft::before, .chip-open::before { background: var(--draft); }
.chip-sent, .chip-medium, .chip-inprogress { background: var(--info-soft); color: var(--info); } .chip-sent::before, .chip-medium::before, .chip-inprogress::before { background: var(--info); }
.chip-paid, .chip-resolved, .chip-done, .chip-low { background: var(--accent-soft); color: var(--income); } .chip-paid::before, .chip-resolved::before, .chip-done::before, .chip-low::before { background: var(--income); }
.chip-overdue, .chip-high, .chip-critical { background: var(--danger-soft); color: var(--danger); } .chip-overdue::before, .chip-high::before, .chip-critical::before { background: var(--danger); }
.chip-bug { background: var(--danger-soft); color: var(--danger); } .chip-bug::before { background: var(--danger); }
.chip-idea { background: var(--info-soft); color: var(--info); } .chip-idea::before { background: var(--info); }
.chip-question { background: var(--warning-soft); color: var(--warning); } .chip-question::before { background: var(--warning); }
.chip-fullevent { background: var(--accent-soft); color: var(--accent); } .chip-fullevent::before { background: var(--accent); }
.chip-protocol { background: var(--info-soft); color: var(--info); } .chip-protocol::before { background: var(--info); }
.chip-proforma { background: var(--warning-soft); color: var(--warning); } .chip-proforma::before { background: var(--warning); }
.chip-admin { background: var(--accent-soft); color: var(--accent); } .chip-admin::before { background: var(--accent); }
.chip-accountant { background: var(--info-soft); color: var(--info); } .chip-accountant::before { background: var(--info); }
.chip-sales { background: var(--warning-soft); color: var(--warning); } .chip-sales::before { background: var(--warning); }
.chip-revenue { background: var(--accent-soft); color: var(--income); } .chip-revenue::before { background: var(--income); }
.chip-expense { background: var(--expense-soft); color: var(--expense); } .chip-expense::before { background: var(--expense); }

.filter-row { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; align-items: center; }
.filter-chip { padding: 6px 12px; border-radius: 20px; border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft); font-size: 12.5px; font-weight: 600; cursor: pointer; }
.filter-chip.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.search-input { padding: 7px 12px; border-radius: 7px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); font-size: 13px; min-width: 200px; margin-left: auto; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12px; font-weight: 600; color: var(--ink-soft); }
.field .hint { font-size: 11.5px; color: var(--ink-muted); }
.input, select.input, textarea.input { padding: 8px 11px; border-radius: 7px; border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); font-size: 13.5px; width: 100%; }
.input[readonly] { background: var(--surface-2); color: var(--ink-muted); cursor: not-allowed; }
textarea.input { resize: vertical; min-height: 60px; font-family: inherit; }
.input:focus { border-color: var(--accent); }
.checkbox-row { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--ink-soft); }
.checkbox-row input { width: 15px; height: 15px; }

.items-table th, .items-table td { padding: 8px 8px; }
.items-table input.input { padding: 6px 8px; font-size: 13px; }
.items-table .desc-col { width: 34%; }
.items-table .num-col { width: 11%; }
.totals-box { margin-left: auto; width: 300px; display: flex; flex-direction: column; gap: 8px; margin-top: 14px; }
.totals-row { display: flex; justify-content: space-between; font-size: 13.5px; }
.totals-row.grand { font-size: 17px; font-weight: 700; padding-top: 8px; border-top: 1px solid var(--line); }
.totals-row .lbl { color: var(--ink-soft); }

.block-card { border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin-bottom: 16px; background: var(--surface-2); }
.block-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.block-head input.input { font-weight: 700; max-width: 260px; }
.block-foot { display: flex; justify-content: flex-end; margin-top: 8px; }
.block-totals { width: 260px; display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; }
.block-totals .totals-row.grand { font-size: 14.5px; }

.modal-backdrop { position: fixed; inset: 0; background: rgba(20,24,27,0.45); display: flex; align-items: flex-start; justify-content: center; padding: 60px 20px; z-index: 50; overflow-y: auto; }
.modal { background: var(--surface); border-radius: 14px; width: 420px; max-width: 100%; padding: 24px; box-shadow: var(--shadow); }
.modal.wide { width: 560px; }
.modal h2 { font-size: 17px; margin-bottom: 16px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.type-choice { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.type-card { border: 1px solid var(--line-strong); border-radius: 10px; padding: 16px; cursor: pointer; text-align: left; background: var(--surface); }
.type-card:hover { border-color: var(--accent); background: var(--accent-soft); }
.type-card h3 { font-size: 14px; margin-bottom: 6px; }
.type-card p { font-size: 12px; color: var(--ink-muted); margin: 0; }

.section-title { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-muted); margin: 22px 0 10px; }
.section-title:first-child { margin-top: 0; }

.invoice-doc { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); padding: 30px 34px; box-shadow: var(--shadow); }
.invoice-doc-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; gap: 20px; flex-wrap: wrap; }
.invoice-doc-biz { font-family: "Source Serif 4", serif; font-size: 20px; font-weight: 600; }
.invoice-doc-biz-meta { font-size: 11.5px; color: var(--ink-muted); margin-top: 4px; line-height: 1.5; }
.invoice-doc-num { text-align: right; }
.invoice-doc-num .num { font-family: "IBM Plex Mono", monospace; font-size: 15px; font-weight: 600; }
.bill-to-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 22px; }
.bill-to-grid .lbl { font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--ink-muted); font-weight: 600; margin-bottom: 4px; }
.doc-block-title { font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; margin: 18px 0 6px; color: var(--ink); }
.bank-box { margin-top: 24px; padding-top: 14px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--ink-soft); }
.bank-box .lbl { font-weight: 700; color: var(--ink); }

.activity-log { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.activity-item { display: flex; gap: 10px; font-size: 12.5px; }
.activity-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-top: 5px; flex-shrink: 0; }
.activity-text { color: var(--ink); } .activity-text b { font-weight: 600; }
.activity-time { color: var(--ink-muted); font-size: 11px; }

.chart-legend { display: flex; gap: 18px; margin-bottom: 12px; align-items: center; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--ink-soft); }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; }
.bar-tooltip { position: absolute; background: var(--ink); color: var(--paper); font-size: 11.5px; padding: 6px 9px; border-radius: 6px; pointer-events: none; white-space: nowrap; transform: translate(-50%, -100%); font-family: "IBM Plex Mono", monospace; z-index: 10; }

.role-row { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.role-row:last-child { border-bottom: none; }
.role-row .grow { flex: 1; min-width: 0; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--paper); padding: 10px 18px; border-radius: 8px; font-size: 13px; z-index: 100; box-shadow: var(--shadow); }

@media (max-width: 900px) { .kpi-row { grid-template-columns: repeat(2, 1fr); } .form-grid, .type-choice { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .app-shell { flex-direction: column; } .sidebar { width: 100%; padding: 10px; }
  .main { padding: 18px 16px 40px; } .kpi-row { grid-template-columns: 1fr 1fr; }
}
@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .main { padding: 0; max-width: none; } body { background: #fff; }
  .invoice-doc { box-shadow: none; border: none; padding: 0; }
}
@media (prefers-reduced-motion: no-preference) { .card, .btn { transition: border-color 120ms ease, background 120ms ease; } }