:root {
  --bg: #f4f4f2;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e2e2de;
  --dark: #0d0d0d;
  --gold: #e0a800;
  --gold-dark: #b98a00;
  --danger: #c62828;
  --ok: #2e7d32;
  --info: #1565c0;
  --radius: 10px;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; }
[hidden] { display: none !important; }
a { color: inherit; }
h1 { font-size: 1.6rem; margin: 0; }
h2 { font-size: 1.15rem; margin: 0 0 12px; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
main.wrap { padding-top: 24px; padding-bottom: 60px; }

/* Top bar */
.topbar { background: var(--dark); color: #fff; position: sticky; top: 0; z-index: 10; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: .02em; }
.brand img { height: 40px; width: auto; }
.brand em { font-style: normal; color: var(--gold); }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a, .nav .link { color: #cfcfcf; text-decoration: none; padding: 8px 12px; border-radius: 6px; font-size: .95rem; }
.nav a:hover, .nav .link:hover { color: #fff; background: #222; }
.nav a.active { color: var(--dark); background: var(--gold); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font: inherit; font-weight: 600; font-size: .92rem;
  padding: 9px 16px; border-radius: 8px; cursor: pointer; text-decoration: none;
  border: 1px solid var(--line); background: #fff; color: var(--text);
}
.btn:hover { border-color: #bbb; }
.btn-primary { background: var(--gold); border-color: var(--gold); color: #111; }
.btn-primary:hover { background: var(--gold-dark); border-color: var(--gold-dark); }
.btn-dark { background: var(--dark); border-color: var(--dark); color: #fff; }
.btn-danger { color: var(--danger); }
.btn-danger:hover { border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: .85rem; }
.btn:disabled { opacity: .55; cursor: wait; }
button.link { background: none; border: 0; font: inherit; cursor: pointer; }
.btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(224, 168, 0, .55); outline-offset: 1px;
}

/* Layout pieces */
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.stat span { display: block; color: var(--muted); font-size: .85rem; }
.stat strong { font-size: 1.5rem; }
.stat.warn strong { color: var(--danger); }
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.filters > * { flex: 1 1 180px; }
.muted { color: var(--muted); }
.empty { text-align: center; color: var(--muted); padding: 40px 10px; }
.error-box { background: #fdecea; color: var(--danger); border-radius: 8px; padding: 12px 14px; }

/* Tables */
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); background: #fafaf8; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tbody tr.clickable { cursor: pointer; }
tbody tr.clickable:hover { background: #fbf8ec; }
td.num, th.num { text-align: right; white-space: nowrap; }
td.nowrap { white-space: nowrap; }

.badge { display: inline-block; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; padding: 3px 9px; border-radius: 999px; }
.badge-draft { background: #ececec; color: #555; }
.badge-sent { background: #e3eefc; color: var(--info); }
.badge-paid { background: #e5f4e6; color: var(--ok); }
.badge-overdue { background: #fdecea; color: var(--danger); }

/* Forms */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px 18px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
label { font-weight: 600; font-size: .85rem; }
input, select, textarea {
  font: inherit; color: inherit; background: #fff;
  border: 1px solid #cfcfca; border-radius: 7px; padding: 9px 11px; width: 100%;
}
textarea { resize: vertical; min-height: 80px; }
.hint { font-size: .8rem; color: var(--muted); }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.check input { width: auto; }

/* Invoice editor */
.items td { padding: 8px 6px; }
.items th { padding: 8px 6px; }
.items input { padding: 7px 8px; }
.items .c-date { width: 150px; }
.items .c-qty { width: 80px; }
.items .c-price { width: 110px; }
.items .c-amt { width: 100px; }
.items .c-del { width: 40px; }
.items .remove { border: 0; background: none; color: var(--muted); font-size: 1.3rem; cursor: pointer; line-height: 1; padding: 4px 8px; }
.items .remove:hover { color: var(--danger); }
.items-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 12px; }
.total { font-size: 1.3rem; font-weight: 700; }
.total span { color: var(--muted); font-weight: 500; font-size: 1rem; margin-right: 8px; }
.status-line { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: .9rem; }
.sticky-actions { position: sticky; bottom: 0; background: var(--bg); padding: 12px 0; border-top: 1px solid var(--line); display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }

/* Login */
.login { max-width: 380px; margin: 8vh auto 0; text-align: center; }
.login img { width: 150px; height: auto; margin: 0 auto 16px; display: block; border-radius: 12px; }
.login form { text-align: left; display: grid; gap: 14px; }

.btn-block { width: 100%; }
.or { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: .85rem; margin: 18px 0 14px; }
.or::before, .or::after { content: ''; flex: 1; border-top: 1px solid var(--line); }
.small { font-size: .85rem; }
.notice { background: #fff8e1; border: 1px solid #f3d27a; border-radius: 8px; padding: 12px 14px; margin-bottom: 20px; }
.success { background: #e8f5e9; border: 1px solid #a5d6a7; border-radius: 8px; padding: 12px 14px; margin-bottom: 20px; }
.steps { counter-reset: step; display: grid; gap: 18px; }
.step h2::before { counter-increment: step; content: counter(step); display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--gold); color: #111; font-size: .9rem; margin-right: 10px; }
.totp-setup { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.totp-setup img { width: 180px; height: 180px; border: 1px solid var(--line); border-radius: 8px; }
.key { font-family: ui-monospace, Consolas, monospace; font-size: 1.05rem; letter-spacing: .05em; background: #f4f4f2; padding: 8px 10px; border-radius: 6px; display: inline-block; user-select: all; }
.link-box { display: flex; gap: 8px; }
.link-box input { font-family: ui-monospace, Consolas, monospace; font-size: .85rem; }
.wide { max-width: 640px; margin: 0 auto; }

/* Modal */
dialog { border: 0; border-radius: 12px; padding: 0; width: min(520px, calc(100vw - 32px)); box-shadow: 0 20px 60px rgba(0,0,0,.3); }
dialog::backdrop { background: rgba(0,0,0,.5); }
#modal-form { padding: 22px; display: grid; gap: 14px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.preview-list { margin: 0; padding-left: 18px; color: var(--muted); font-size: .9rem; max-height: 160px; overflow: auto; }

/* Toast */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--dark); color: #fff; padding: 12px 18px; border-radius: 8px; font-weight: 500; opacity: 0; pointer-events: none; transition: opacity .2s; max-width: calc(100vw - 32px); z-index: 100; }
.toast.show { opacity: 1; }
.toast.err { background: var(--danger); }

@media (max-width: 640px) {
  .items thead { display: none; }
  .items tr { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 10px 0; border-bottom: 1px solid var(--line); }
  .items td { border: 0; padding: 0; width: auto !important; }
  .items td.c-desc { grid-column: 1 / -1; order: -1; }
  .items td.c-amt { align-self: center; }
  th, td { padding: 9px 10px; }
}