/* QuietBill — screen styles. Light/dark via CSS variables; the .paper
   document preview is always white (it is paper). */

:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --ink: #16181d;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --accent-ink: #ffffff;
  --danger: #b91c1c;
  --shadow: 0 1px 3px rgba(16, 18, 24, .08), 0 8px 28px rgba(16, 18, 24, .07);
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #181b22;
    --ink: #e8eaef;
    --muted: #9aa1ad;
    --line: #2a2e38;
    --accent: #818cf8;
    --accent-soft: #23263a;
    --accent-ink: #0f1115;
    --shadow: 0 1px 3px rgba(0, 0, 0, .5), 0 8px 28px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
img { max-width: 100%; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); font-weight: 400; }
.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--panel); padding: 8px 14px; border-radius: 8px;
}
.skip-link:focus { left: 8px; }

/* ── Header / footer ─────────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 22px;
  min-height: 58px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none;
}
.brand svg { display: block; }
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
.site-nav a {
  color: var(--muted); text-decoration: none; font-weight: 500;
  padding: 7px 11px; border-radius: 8px;
}
.site-nav a:hover { color: var(--ink); background: var(--bg); }
.site-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.site-nav a.nav-pro { color: var(--accent); font-weight: 600; }

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 72px; padding: 30px 0 44px; color: var(--muted); font-size: 14px;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 26px; align-items: center; }
.site-footer a { color: var(--muted); }
.site-footer .foot-brand { font-weight: 600; color: var(--ink); }

/* ── Hero ────────────────────────────────────────────────────────────── */

.hero { text-align: center; padding: 42px 0 8px; }
.hero h1 { font-size: clamp(28px, 4.4vw, 44px); margin: 0 0 10px; }
.hero .sub {
  max-width: 640px; margin: 0 auto; color: var(--muted); font-size: 17px;
}
.trust-row {
  display: flex; justify-content: center; flex-wrap: wrap;
  gap: 8px 22px; margin: 18px 0 6px; padding: 0; list-style: none;
  color: var(--muted); font-size: 14px; font-weight: 500;
}
.trust-row li::before { content: "✓ "; color: var(--accent); font-weight: 700; }

/* ── Workbench (editor + preview) ────────────────────────────────────── */

.workbench {
  display: grid; grid-template-columns: minmax(430px, 560px) minmax(0, 1fr);
  gap: 26px; align-items: start; margin: 26px 0 10px;
}
.editor { display: flex; flex-direction: column; gap: 14px; }

.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px;
}
details.panel > summary {
  cursor: pointer; font-weight: 600; user-select: none;
  margin: -4px 0 2px; list-style-position: inside;
}
details.panel[open] > summary { margin-bottom: 10px; }
.panel-title { font-weight: 600; margin-bottom: 10px; }

label { display: block; font-size: 13px; font-weight: 500; color: var(--muted); }
label > input, label > select, label > textarea { margin-top: 4px; }
input, select, textarea, button {
  font: inherit; color: var(--ink);
}
input, select, textarea {
  width: 100%; min-width: 0; background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px;
}
input[type="color"] { padding: 2px; height: 38px; width: 54px; cursor: pointer; }
input[type="file"] { padding: 6px; background: transparent; border-style: dashed; }
textarea { resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}

.grid { display: grid; gap: 10px; margin-bottom: 10px; }
.grid > label, .items-head > *, .item-row > * { min-width: 0; }
.grid:last-child { margin-bottom: 0; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1.2fr 1fr 1fr; }
.grid-4 { grid-template-columns: 1.3fr .8fr .9fr 1fr; }

/* Items editor */
.items-head, .item-row {
  display: grid; grid-template-columns: minmax(0, 1fr) 68px 96px 92px 30px;
  gap: 8px; align-items: center;
}
.items-head {
  font-size: 12px; color: var(--muted); font-weight: 600;
  padding: 0 2px 6px;
}
.item-row { margin-bottom: 8px; }
.it-amount { font-size: 13px; text-align: right; color: var(--muted); overflow: hidden; }
.it-remove {
  border: none; background: transparent; color: var(--muted);
  font-size: 17px; cursor: pointer; border-radius: 6px; padding: 4px 6px;
}
.it-remove:hover { color: var(--danger); background: var(--bg); }

/* Buttons */
button, .button {
  cursor: pointer; border: 1px solid var(--line); background: var(--panel);
  border-radius: 8px; padding: 9px 14px; font-weight: 600; color: var(--ink);
  text-decoration: none; display: inline-block;
}
button:hover, .button:hover { border-color: var(--muted); }
.primary, button.primary {
  background: var(--accent); border-color: var(--accent); color: var(--accent-ink);
}
.primary:hover { filter: brightness(1.06); border-color: var(--accent); }
.ghost { background: transparent; }
.small { padding: 6px 10px; font-size: 13px; font-weight: 500; }

.actions {
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
  padding: 2px 2px 0;
}
.actions .inline-label {
  display: flex; align-items: center; gap: 7px; font-size: 13px; margin-left: auto;
}
.actions .inline-label select { width: auto; padding: 6px 8px; }
.actions-pro { display: inline-flex; gap: 9px; }
.hint { color: var(--muted); font-size: 13px; margin: 2px 2px 0; }

.client-tools { display: flex; gap: 8px; margin-bottom: 12px; align-items: center; }
.client-tools select { flex: 1; }
.branding-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.branding-row label { margin: 0; }
.file-label input { width: 210px; }

.pro-chip {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  font-size: 11px; font-weight: 700; letter-spacing: .04em;
  padding: 2px 7px; border-radius: 99px; vertical-align: 2px;
}
body:not(.is-pro) [data-pro] { opacity: .92; }

/* ── Preview / paper ─────────────────────────────────────────────────── */

.preview { position: sticky; top: 18px; }
.paper {
  --accent: #4f46e5;
  background: #fff; color: #1a1c22;
  width: 100%; max-width: 760px; min-height: 940px;
  margin: 0 auto; padding: 48px 52px;
  box-shadow: var(--shadow); border-radius: 4px;
  font-size: 14px; line-height: 1.5;
}
body.paper-letter .paper { min-height: 900px; }

.p-dim { color: #9ca3af; }
.p-label {
  font-size: 11px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: #6b7280; margin-bottom: 4px;
}

.p-top { display: flex; justify-content: space-between; gap: 28px; }
.p-id { min-width: 0; }
.p-logo { max-height: 64px; max-width: 240px; margin-bottom: 12px; display: block; }
.p-sender-name { font-weight: 700; font-size: 16px; }
.p-sender { color: #374151; }
.p-sender > div { margin-top: 1px; }

.p-doc { text-align: right; flex-shrink: 0; }
.p-type {
  font-size: 26px; font-weight: 800; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent);
}
.p-num { color: #374151; font-weight: 600; margin-top: 2px; }
.p-dates { margin: 12px 0 0; }
.p-dates div { display: flex; justify-content: flex-end; gap: 12px; margin-top: 2px; }
.p-dates dt { color: #6b7280; }
.p-dates dd { margin: 0; font-weight: 600; }

.p-billto { margin: 30px 0 6px; }
.p-billto-name { font-weight: 700; }
.p-billto-body { color: #374151; }

.p-items {
  width: 100%; border-collapse: collapse; margin-top: 18px;
}
.p-items th {
  text-align: left; font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  color: #6b7280; padding: 0 8px 7px; border-bottom: 2px solid var(--accent);
}
.p-items td {
  padding: 9px 8px; border-bottom: 1px solid #e5e7eb; vertical-align: top;
}
.p-items .c-num { text-align: right; white-space: nowrap; }
.p-items th.c-num { text-align: right; }
.p-items .c-desc { width: 58%; }

.p-bottom { display: flex; justify-content: space-between; gap: 30px; margin-top: 20px; }
.p-textblocks { flex: 1; min-width: 0; }
.p-block { margin-top: 14px; color: #374151; }
.p-totals { width: 250px; flex-shrink: 0; position: relative; }
.t-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 5px 0; color: #374151;
}
.t-total {
  border-top: 2px solid var(--accent); margin-top: 6px; padding-top: 9px;
  font-weight: 800; font-size: 16px; color: #16181d;
}
.p-paid {
  position: absolute; top: -44px; right: 0;
  border: 3px solid #15803d; color: #15803d; border-radius: 8px;
  font-weight: 800; letter-spacing: .18em; padding: 3px 12px;
  transform: rotate(-8deg); opacity: .9;
}
.p-brandline {
  margin-top: 44px; padding-top: 12px; border-top: 1px solid #e5e7eb;
  font-size: 11px; color: #9ca3af; text-align: center;
}

/* ── Marketing sections ──────────────────────────────────────────────── */

.mkt { margin-top: 72px; }
.mkt h2 { font-size: 27px; text-align: center; margin: 0 0 8px; }
.mkt .mkt-sub { text-align: center; color: var(--muted); max-width: 620px; margin: 0 auto 34px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px;
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card .step-n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 99px; margin-bottom: 10px;
  background: var(--accent-soft); color: var(--accent); font-weight: 700;
}

.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px 18px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--muted); margin: 10px 0 2px; }

.cta-band {
  text-align: center; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 34px 22px; margin-top: 72px;
}
.cta-band h2 { margin: 0 0 6px; }
.cta-band p { color: var(--muted); margin: 0 0 18px; }

/* ── Content pages (guides, legal, pro) ──────────────────────────────── */

.page { max-width: 760px; margin: 40px auto 0; }
.page h1 { font-size: clamp(26px, 4vw, 36px); }
.page h2 { margin-top: 34px; }
.page p, .page li { color: var(--ink); }
.page .lead { color: var(--muted); font-size: 17px; }
.page table { border-collapse: collapse; width: 100%; margin: 18px 0; }
.page th, .page td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.page th { background: var(--panel); }
.page .byline { color: var(--muted); font-size: 13px; margin-bottom: 26px; }
.guide-list { list-style: none; padding: 0; display: grid; gap: 12px; }
.guide-list a { font-weight: 600; text-decoration: none; }
.guide-list li {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px 18px;
}
.guide-list p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

/* Pricing (pro.html) */
.price-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 30px 0; }
.price-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px;
}
.price-card.featured { border-color: var(--accent); box-shadow: var(--shadow); }
.price-card .amount { font-size: 38px; font-weight: 800; letter-spacing: -.02em; }
.price-card .amount small { font-size: 14px; color: var(--muted); font-weight: 500; }
.price-card ul { padding-left: 0; list-style: none; margin: 16px 0 20px; }
.price-card li { padding: 4px 0; }
.price-card li::before { content: "✓ "; color: var(--accent); font-weight: 700; }

/* ── Modals & toast ──────────────────────────────────────────────────── */

.modal {
  border: 1px solid var(--line); border-radius: 14px; padding: 26px;
  background: var(--panel); color: var(--ink);
  width: min(440px, 92vw); box-shadow: var(--shadow);
}
.modal::backdrop { background: rgba(10, 12, 18, .55); }
.modal h3 { margin: 0 0 2px; font-size: 21px; }
.modal-sub { color: var(--muted); margin: 0 0 14px; }
.modal-x-form { float: right; margin: -8px -8px 0 0; }
.modal-x {
  border: none; background: transparent; font-size: 22px; color: var(--muted);
  padding: 2px 9px; border-radius: 8px;
}
.pro-list { padding-left: 0; list-style: none; margin: 0 0 18px; }
.pro-list li { padding: 3px 0; }
.pro-list li::before { content: "✓ "; color: var(--accent); font-weight: 700; }
.buy-link { display: block; text-align: center; }
.activate-block { border-top: 1px solid var(--line); margin-top: 20px; padding-top: 16px; }
.activate-title { font-weight: 600; margin-bottom: 8px; }
.activate-row { display: flex; gap: 8px; }
.activate-row input { flex: 1; }
.license-status { color: var(--danger); font-size: 13px; min-height: 18px; margin: 8px 0 0; }
.small-note { font-size: 12px; margin: 8px 0 0; }

.history-list { max-height: 400px; overflow-y: auto; }
.history-row {
  display: grid; grid-template-columns: 1fr auto; gap: 4px 14px;
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; margin-bottom: 8px;
}
.history-row .h-main { display: flex; gap: 10px; align-items: baseline; min-width: 0; }
.history-row .h-side { text-align: right; font-size: 13px; display: flex; gap: 10px; }
.history-row .h-actions { grid-column: 1 / -1; display: flex; gap: 8px; }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(8px);
  background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 99px;
  font-weight: 600; font-size: 14px; opacity: 0; transition: opacity .18s, transform .18s;
  z-index: 60; pointer-events: none; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Responsive ──────────────────────────────────────────────────────── */

@media (max-width: 1020px) {
  .workbench { grid-template-columns: 1fr; }
  .preview { position: static; }
  .paper { min-height: 0; padding: 34px 30px; }
  .cards { grid-template-columns: 1fr; }
  .price-cards { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-3 > label:first-child, .grid-4 > label:first-child { grid-column: 1 / -1; }
  .items-head { display: none; }
  .item-row { grid-template-columns: 1fr 1fr; grid-auto-rows: auto; }
  .item-row .it-desc { grid-column: 1 / -1; }
  .item-row .it-amount { text-align: left; }
  .p-top, .p-bottom { flex-direction: column; }
  .p-doc { text-align: left; }
  .p-dates div { justify-content: flex-start; }
  .p-totals { width: 100%; }
  .p-paid { position: static; display: inline-block; margin-bottom: 10px; }
}