:root {
  --bg: #fbf8f4;
  --panel: #ffffff;
  --ink: #1f2430;
  --muted: #5c6270;
  --line: #e6e0d8;
  --accent: #0f8b8d;
  --accent-ink: #ffffff;
  --accent-2: #e2725b;
  --cup: #eef4f4;
  --error: #b42318;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(31 36 48 / 0.06), 0 8px 24px rgb(31 36 48 / 0.06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --panel: #1c2027;
    --ink: #eceff4;
    --muted: #a3aab8;
    --line: #2d333d;
    --accent: #34b3b5;
    --accent-ink: #0d1114;
    --accent-2: #f08a73;
    --cup: #20303a;
    --error: #ff8a80;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }

.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  max-width: 1160px; margin: 0 auto; padding: 16px;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.site-header nav { display: flex; gap: 16px; font-size: 0.95rem; }
.site-header nav a { color: var(--muted); text-decoration: none; }
.site-header nav a:hover { color: var(--ink); }

main { max-width: 1160px; margin: 0 auto; padding: 0 16px 48px; }

.hero { text-align: center; padding: 24px 0 28px; }
.hero h1 { font-size: clamp(1.8rem, 4.5vw, 2.8rem); margin: 0 auto 12px; max-width: 18em; }
.hero em { font-style: normal; color: var(--accent); }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 40em; margin: 0 auto; }

.tool { display: grid; grid-template-columns: minmax(0, 360px) minmax(0, 1fr); gap: 20px; align-items: start; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }

fieldset { border: 0; margin: 0 0 18px; padding: 0; min-width: 0; }
legend { font-weight: 650; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.step {
  display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-size: 0.8rem;
}

.drop {
  display: flex; flex-direction: column; gap: 4px; align-items: center; text-align: center;
  border: 2px dashed var(--line); border-radius: 12px; padding: 20px 12px; cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop:hover, .drop:focus-visible, .drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); outline: none; }
.drop span { color: var(--muted); font-size: 0.88rem; }
.drop.loaded { border-style: solid; }

.row { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; font-size: 0.92rem; color: var(--muted); }
.row.split { flex-direction: row; gap: 10px; }
input[type="number"], input[type="text"], select {
  font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 9px; padding: 8px 10px; width: 100%; min-width: 0;
}
input:focus-visible, select:focus-visible, button:focus-visible, .button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { padding: 6px 12px; cursor: pointer; font-size: 0.88rem; color: var(--muted); }
.seg label:has(input:checked) { background: var(--accent); color: var(--accent-ink); }
.seg label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: -2px; }

.section.multi { border: 1px solid var(--line); border-radius: 10px; padding: 4px 12px; margin: 10px 0; }
.section-head { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; font-size: 0.92rem; }
#add-section { font-size: 0.9rem; text-align: left; }
.check { display: flex; gap: 8px; align-items: flex-start; margin: 10px 0; font-size: 0.92rem; }
.hint { font-size: 0.85rem; color: var(--muted); margin: 6px 0 0; }
.more summary { cursor: pointer; font-weight: 600; }
.more[open] summary { margin-bottom: 4px; }
.error { color: var(--error); font-size: 0.9rem; margin: 12px 0 0; }

button, .button {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: 10px; padding: 10px 16px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink); text-decoration: none;
  display: inline-flex; justify-content: center; align-items: center;
}
button:disabled, .button[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }
.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.link { background: none; border: 0; padding: 4px 0; color: var(--accent); font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }

.output { display: flex; flex-direction: column; gap: 14px; }
.preview {
  position: relative; min-height: 260px; border-radius: 10px; display: grid; place-items: center; padding: 12px;
  background-color: var(--bg);
  background-image: conic-gradient(var(--line) 25%, transparent 0 50%, var(--line) 0 75%, transparent 0);
  background-size: 18px 18px;
}
.preview canvas { max-width: 100%; height: auto; display: block; }
.preview canvas:not(.ready) { display: none; }
.empty { color: var(--muted); margin: 0; background: var(--panel); padding: 6px 12px; border-radius: 8px; }
.summary { margin: 0; color: var(--muted); font-size: 0.92rem; min-height: 1.4em; }
.summary strong { color: var(--ink); }
.summary .warn { color: var(--accent-2); }

.downloads { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.pdf-row { display: flex; gap: 8px; min-width: 0; max-width: 100%; flex: 1 1 320px; }
.pdf-row select { flex: 1 1 auto; width: auto; min-width: 0; }
.pdf-row button { flex: none; }

.license { border-top: 1px solid var(--line); padding-top: 14px; }
.license p { margin: 0 0 10px; font-size: 0.92rem; color: var(--muted); }
.license-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.key-form { display: flex; gap: 8px; margin-top: 10px; }

.content { max-width: 760px; margin: 56px auto 0; }
.content h2 { margin-top: 48px; font-size: 1.6rem; }
.content li { margin-bottom: 6px; }
.measure-fig { margin: 16px 0; display: flex; justify-content: center; }
.measure-fig svg { width: 100%; max-width: 320px; height: auto; }
.measure-fig text { font-size: 12px; fill: var(--ink); }
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.plan { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 20px 12px; }
.plan.featured { border: 2px solid var(--accent); }
.plan h3 { display: flex; justify-content: space-between; align-items: baseline; }
.price { color: var(--accent); font-size: 1.4rem; }
.content details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.content details summary { cursor: pointer; font-weight: 600; }

.article { margin-top: 24px; }
.article h1 { font-size: clamp(1.8rem, 4.5vw, 2.4rem); }
.article h3 { margin-top: 28px; }
.article table { width: 100%; border-collapse: collapse; font-size: 0.92rem; display: block; overflow-x: auto; }
.article th, .article td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.article th { color: var(--muted); font-weight: 600; }
.cta { margin: 48px 0 0; padding: 20px; border: 2px solid var(--accent); border-radius: var(--radius); background: var(--panel); }
.cta p { margin-top: 0; }
.more-guides ul { padding-left: 20px; }
.site-footer .guides { margin-bottom: 8px; }

.site-footer { text-align: center; color: var(--muted); font-size: 0.88rem; padding: 32px 16px; border-top: 1px solid var(--line); }

@media (max-width: 820px) {
  .tool { grid-template-columns: minmax(0, 1fr); }
  .site-header nav { gap: 12px; font-size: 0.88rem; }
  .plans { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .site-header nav a:first-child { display: none; }
}