:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e6e4df;
  --accent: #0f6b5a;
  --accent-soft: #e7f2ee;
  --danger: #b3261e;
  --warn: #b5800a;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(0,0,0,.04);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.5; }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; margin: 0 0 .6rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.3rem; margin-bottom: 1rem; }
h3 { font-size: 1rem; }

p { margin: 0 0 .6rem; }
.muted { color: var(--muted); font-size: .9rem; }
.error { color: var(--danger); font-size: .9rem; }
code { font-family: var(--mono); background: #f0ede6; padding: 1px 5px; border-radius: 3px; }

/* ---------- Login ---------- */
.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #f4f1ea, #fafaf8);
}
.login .card { width: min(380px, 92vw); }
.login h1 { text-align: center; margin-bottom: .25rem; }
.login p { text-align: center; }

/* ---------- Top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 1rem;
  padding: .75rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand { font-weight: 700; letter-spacing: .02em; }
.topbar nav { display: flex; gap: .25rem; flex: 1; }
.topbar nav a {
  text-decoration: none; color: var(--muted);
  padding: .4rem .7rem; border-radius: 6px; font-size: .92rem;
}
.topbar nav a:hover { background: #f1efea; color: var(--ink); }
.topbar nav a.active { background: var(--accent-soft); color: var(--accent); }

/* ---------- Layout ---------- */
main { max-width: 1100px; margin: 0 auto; padding: 1.5rem; }
.page { display: block; }
.mt { margin-top: 1.2rem; }

.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.span-2 { grid-column: span 2; }

@media (max-width: 760px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .span-2 { grid-column: 1; }
  main { padding: 1rem; }
  .topbar { padding: .6rem .8rem; flex-wrap: wrap; }
  .topbar nav { order: 3; width: 100%; overflow-x: auto; }
}

/* ---------- Cards & forms ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow);
}

label { display: block; font-size: .82rem; color: var(--muted); margin-bottom: .5rem; }
label.inline { display: inline-flex; align-items: center; gap: .35rem; color: var(--ink); font-size: .9rem; }

input[type=text], input[type=password], input[type=email], input[type=date], input[type=number], select, textarea {
  display: block;
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .45rem .55rem;
  margin-top: .2rem;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 107, 90, .15);
}

button {
  font: inherit;
  background: var(--ink); color: #fff;
  border: 0;
  border-radius: 6px;
  padding: .5rem .9rem;
  cursor: pointer;
}
button:hover { opacity: .9; }
button.primary { background: var(--accent); }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); }
button.ghost:hover { background: #f1efea; }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--line); }

fieldset { border: 1px solid var(--line); border-radius: 6px; padding: .8rem 1rem 1rem; margin: 0; }
legend { padding: 0 .35rem; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
fieldset label + label { margin-top: .6rem; }

.form-row {
  display: grid;
  grid-template-columns: 140px 200px 100px 1fr auto auto;
  gap: .5rem;
  align-items: end;
}
.form-row label.inline { white-space: nowrap; }
@media (max-width: 760px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}

.toolbar { display: flex; flex-wrap: wrap; gap: .5rem; align-items: end; margin-bottom: .8rem; }
.toolbar label { margin-bottom: 0; }

/* ---------- Stats ---------- */
.stat .label { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.stat .big   { font-size: 2rem; font-weight: 600; margin-top: .3rem; }
.stat .sub   { color: var(--muted); font-size: .9rem; margin-top: .1rem; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .55rem .5rem; border-bottom: 1px solid var(--line); }
th { font-weight: 600; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr:hover td { background: #fafaf6; }

.tag {
  display: inline-block;
  font-size: .72rem;
  padding: 1px 7px;
  border-radius: 999px;
  background: #f0ede6;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.tag.billed { background: var(--accent-soft); color: var(--accent); }
.tag.draft  { background: #fff3d6; color: var(--warn); }
.tag.sent   { background: #e8eef9; color: #2353a0; }
.tag.paid   { background: var(--accent-soft); color: var(--accent); }

.row-actions { display: flex; gap: .35rem; justify-content: flex-end; }
.row-actions button { padding: .25rem .5rem; font-size: .8rem; }

/* ---------- Progress ---------- */
.progress {
  height: 8px; background: #f0ede6; border-radius: 999px; overflow: hidden; margin: .6rem 0;
}
.progress > div { height: 100%; background: var(--accent); }
.progress-rows { display: grid; gap: .6rem; }
.progress-rows .row { display: grid; grid-template-columns: 120px 1fr 110px; gap: .8rem; align-items: center; font-size: .9rem; }
.progress-rows .row .label { color: var(--muted); }
.progress-rows .row .val   { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- Invoice (print) ---------- */
.invoice {
  background: #fff; padding: 2.5rem 2.5rem; max-width: 820px; margin: 1rem auto;
  border: 1px solid var(--line); border-radius: 8px;
}
.invoice h1 { font-size: 1.8rem; margin-bottom: .2rem; }
.invoice .meta { display: flex; justify-content: space-between; gap: 2rem; margin: 1.5rem 0; }
.invoice .meta .col h4 { margin: 0 0 .2rem; font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.invoice table { margin-top: 1rem; }
.invoice .totals { width: 320px; margin-left: auto; margin-top: 1rem; }
.invoice .totals .row { display: flex; justify-content: space-between; padding: .35rem 0; font-variant-numeric: tabular-nums; }
.invoice .totals .row.grand { border-top: 2px solid var(--ink); font-weight: 700; font-size: 1.05rem; padding-top: .55rem; }
.invoice .notes { margin-top: 2rem; font-size: .85rem; color: var(--muted); }
.invoice-toolbar { max-width: 820px; margin: 1rem auto 0; display: flex; gap: .5rem; justify-content: flex-end; }

@media print {
  body { background: #fff; }
  .topbar, .invoice-toolbar { display: none !important; }
  main { padding: 0; max-width: none; }
  .invoice { border: 0; box-shadow: none; margin: 0; padding: 1.2cm 1.5cm; max-width: none; }
  @page { margin: 1cm; }
}