/* ============================================================
   Laskupaja – shared stylesheet
   Mobile-first, system font stack, no external resources.
   ============================================================ */

:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #5b6577;
  --line: #dbe1ea;
  --accent: #1d4ed8;
  --accent-strong: #1e40af;
  --accent-soft: #e8edfb;
  --ok: #047857;
  --ok-soft: #e6f4ee;
  --err: #b42318;
  --err-soft: #fdecea;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.05);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand svg { display: block; }

.main-nav {
  margin-left: auto;
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-link {
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-link:hover { color: var(--ink); background: var(--bg); }

.nav-link.active { color: var(--accent-strong); background: var(--accent-soft); }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  margin-left: 0.5rem;
}

.lang-toggle button {
  border: 0;
  background: transparent;
  padding: 0.3rem 0.7rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}

.lang-toggle button.active {
  background: var(--accent);
  color: #fff;
}

/* ---------- Layout ---------- */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem 1rem 2.5rem;
}

.container.narrow { max-width: 860px; }

.hero { padding: 2.25rem 0 1rem; }

.hero h1 {
  font-size: clamp(1.7rem, 4.5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
}

.hero .lead {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 46rem;
  margin: 0 0 1.25rem;
}

.badge-2026 {
  display: inline-block;
  background: var(--ok-soft);
  color: var(--ok);
  border: 1px solid #bfe3d2;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.7rem;
  margin-bottom: 0.9rem;
}

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.card > h2 {
  margin: 0 0 1rem;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.tool-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin: 1.5rem 0;
}

@media (min-width: 720px) {
  .tool-grid { grid-template-columns: 1fr 1fr; }
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(15, 23, 42, 0.08), 0 14px 34px rgba(15, 23, 42, 0.08);
}

.tool-card h3 { margin: 0; font-size: 1.25rem; }

.tool-card p { margin: 0; color: var(--muted); }

.tool-card .go {
  margin-top: auto;
  font-weight: 600;
  color: var(--accent-strong);
}

/* ---------- Feature list & FAQ ---------- */

.features {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 1fr;
  margin: 1rem 0;
  list-style: none;
  padding: 0;
}

@media (min-width: 720px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}

.features li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}

.features strong { display: block; margin-bottom: 0.15rem; }

.features .icon { margin-right: 0.4rem; }

.faq { margin: 1.5rem 0; }

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-bottom: 0.6rem;
}

.faq summary { cursor: pointer; font-weight: 600; }

.faq p { color: var(--muted); margin: 0.6rem 0 0; }

/* ---------- Forms ---------- */

.field { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.8rem; }

.field > label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

input[type="text"],
input[type="date"],
input[type="number"],
select,
textarea {
  font: inherit;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  width: 100%;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

input::placeholder { color: #9aa4b5; }

.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: 0 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.hint { font-size: 0.8rem; color: var(--muted); }

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.4rem 0 0.9rem;
}

.checkbox-field input { width: auto; }

.checkbox-field label { font-size: 0.9rem; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6rem 1.05rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.12s ease;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-strong); }

.btn-secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}
.btn-secondary:hover { background: var(--bg); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: transparent;
  padding: 0.35rem 0.6rem;
}
.btn-ghost:hover { color: var(--err); background: var(--err-soft); }

.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.88rem; }

kbd {
  font-family: var(--mono);
  font-size: 0.78em;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.05rem 0.35rem;
  background: #fff;
}

/* ---------- Items table ---------- */

.table-wrap { overflow-x: auto; }

table.items { width: 100%; border-collapse: collapse; min-width: 640px; }

table.items th {
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 0.4rem 0.5rem;
  border-bottom: 2px solid var(--line);
}

table.items td {
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

table.items input,
table.items select {
  border: 1px solid transparent;
  background: transparent;
  padding: 0.4rem 0.45rem;
}

table.items input:hover,
table.items select:hover { border-color: var(--line); }

table.items input:focus,
table.items select:focus { border-color: var(--accent); background: #fff; }

.col-desc { width: 34%; }
.col-sum { text-align: right; white-space: nowrap; font-weight: 600; }

/* Responsive stacked rows on small screens */
@media (max-width: 719px) {
  table.items { min-width: 0; }
  table.items thead { display: none; }
  table.items tr {
    display: block;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0.4rem 0.6rem;
    margin-bottom: 0.7rem;
    background: #fbfcfe;
  }
  table.items td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 0;
    padding: 0.25rem 0;
  }
  table.items td::before {
    content: attr(data-label);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--muted);
    flex: none;
  }
  table.items td input,
  table.items td select { text-align: right; background: #fff; border-color: var(--line); }
  table.items .col-sum { text-align: right; }
}

/* ---------- Totals ---------- */

.totals-box { margin-left: auto; max-width: 420px; width: 100%; }

.totals-box table { width: 100%; border-collapse: collapse; }

.totals-box td { padding: 0.3rem 0.4rem; }

.totals-box td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

.totals-box tr.group td {
  font-size: 0.85rem;
  color: var(--muted);
  border-bottom: 1px dashed var(--line);
}

.totals-box tr.sub td { border-bottom: 1px solid var(--line); }

.totals-box tr.grand td {
  font-size: 1.2rem;
  font-weight: 700;
  padding-top: 0.55rem;
}

/* ---------- Reference numbers ---------- */

.ref-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) { .ref-grid { grid-template-columns: 1fr 1fr; } }

.ref-box {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}

.ref-box h3 { margin: 0 0 0.25rem; font-size: 0.92rem; }

.ref-box .mono {
  display: block;
  font-family: var(--mono);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  margin: 0.2rem 0 0.6rem;
  word-break: break-all;
}

.ref-box .hint { margin: 0; }

.copy-btn { margin-right: 0.4rem; }

.status-ok { color: var(--ok); font-weight: 600; }
.status-err { color: var(--err); font-weight: 600; }

.inline-row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.inline-row input { flex: 1; min-width: 12rem; }

/* ---------- Autosave note & actions ---------- */

.actions-row {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.5rem;
}

.autosave-note { font-size: 0.8rem; color: var(--muted); margin-left: auto; }

/* ---------- Calculator ---------- */

.seg { display: flex; flex-wrap: wrap; gap: 0.45rem; }

.seg button {
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
}

.seg button:hover { border-color: var(--accent); color: var(--accent-strong); }

.seg button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.result-card { background: var(--accent-soft); border-color: #c9d7f7; }

.result-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: 1fr;
  margin: 0.4rem 0;
}

@media (min-width: 720px) { .result-grid { grid-template-columns: repeat(3, 1fr); } }

.result-item .label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-item .value {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.result-item.main .value { color: var(--accent-strong); font-size: 1.8rem; }

.rate-table { width: 100%; border-collapse: collapse; }

.rate-table th, .rate-table td {
  text-align: left;
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}

.rate-table th { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; }

.notice {
  background: var(--ok-soft);
  border: 1px solid #bfe3d2;
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  font-size: 0.92rem;
}

.notice a { color: var(--ok); font-weight: 600; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 1.5rem 1rem 2.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-inner a { color: var(--muted); }

/* ---------- Print: A4 invoice ---------- */

#print-view { display: none; }

@page { size: A4; margin: 14mm; }

@media print {
  body { background: #fff; }
  body > *:not(#print-view) { display: none !important; }
  #print-view { display: block !important; color: #000; font-size: 10.5pt; }

  #print-view .pv-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 3px solid #000;
    padding-bottom: 8pt;
    margin-bottom: 14pt;
  }

  #print-view h1 { margin: 0; font-size: 20pt; letter-spacing: 0.02em; }

  #print-view .pv-head .pv-brand { font-size: 13pt; font-weight: 700; }

  #print-view .pv-meta { text-align: right; font-size: 9.5pt; }

  #print-view .pv-parties {
    display: flex;
    justify-content: space-between;
    gap: 24pt;
    margin-bottom: 14pt;
  }

  #print-view .pv-party { flex: 1; font-size: 10pt; }

  #print-view .pv-party h3 {
    margin: 0 0 3pt;
    font-size: 8.5pt;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #444;
  }

  #print-view .pv-party p { margin: 0; white-space: pre-line; }

  #print-view table {
    width: 100%;
    border-collapse: collapse;
    font-size: 10pt;
    margin-bottom: 12pt;
  }

  #print-view th {
    border-bottom: 1.5pt solid #000;
    text-align: left;
    padding: 4pt 5pt;
    font-size: 8.5pt;
    text-transform: uppercase;
  }

  #print-view td { border-bottom: 0.5pt solid #bbb; padding: 5pt; }

  #print-view .num { text-align: right; font-variant-numeric: tabular-nums; }

  #print-view .pv-totals { width: 70pt; margin-left: auto; }

  #print-view .pv-totals td { border: 0; padding: 3pt 5pt; }

  #print-view .pv-totals tr.grand td {
    border-top: 1.5pt solid #000;
    font-weight: 700;
    font-size: 12pt;
  }

  #print-view .pv-payment {
    border: 1pt solid #000;
    border-radius: 4pt;
    padding: 10pt 12pt;
    margin-top: 8pt;
    page-break-inside: avoid;
  }

  #print-view .pv-payment h3 {
    margin: 0 0 6pt;
    font-size: 9pt;
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }

  #print-view .pv-payment dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 3pt 12pt;
    margin: 0;
    font-size: 10pt;
  }

  #print-view .pv-payment dt { font-weight: 700; }
  #print-view .pv-payment dd { margin: 0; font-family: var(--mono); }

  #print-view .pv-footer {
    margin-top: 16pt;
    padding-top: 6pt;
    border-top: 0.5pt solid #bbb;
    font-size: 8pt;
    color: #555;
    display: flex;
    justify-content: space-between;
    gap: 12pt;
  }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Utilities ---------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.label-like {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.35rem;
}