:root {
  --bg: #fbfaf7;
  --card: #ffffff;
  --ink: #14151a;
  --ink-2: #3c3f4a;
  --muted: #6b6f7c;
  --line: #e7e4dc;
  --line-2: #d8d4c9;
  --accent: #e34c26;
  --accent-ink: #b8371a;
  --accent-soft: #fdeee9;
  --blue: #2a6df4;
  --green: #138a52;
  --amber: #b26a00;
  --code-bg: #12141b;
  --code-ink: #e6e6ea;
  --code-line: #262935;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 21, 26, .05), 0 8px 24px -12px rgba(20, 21, 26, .16);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Space Grotesk", var(--sans);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 var(--sans); }
img, svg { max-width: 100%; }
a { color: var(--accent-ink); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
code, kbd, pre { font-family: var(--mono); font-size: .9em; }
:not(pre) > code { background: #f1eee7; border: 1px solid var(--line); border-radius: 6px; padding: .05em .35em; }
kbd { background: #fff; border: 1px solid var(--line-2); border-bottom-width: 2px; border-radius: 5px; padding: 0 .35em; font-size: .8em; }
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.2; letter-spacing: -.015em; margin: 0 0 .5em; }
h1 { font-size: clamp(1.9rem, 4.4vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.85rem); font-weight: 700; margin-top: 1.8em; }
h3 { font-size: 1.15rem; font-weight: 700; margin-top: 1.4em; }
.wrap { width: min(1180px, 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 99; background: #fff; padding: 8px 12px; border-radius: 8px; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--blue) 55%, transparent); outline-offset: 2px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-in { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; font: 700 1.12rem var(--display); letter-spacing: -.02em; }
.brand b { color: var(--accent); font-weight: 700; }
.brand img { display: block; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a { color: var(--ink-2); text-decoration: none; font-size: .93rem; font-weight: 500; padding: 6px 10px; border-radius: 8px; }
.nav-links a:hover, .nav-links a[aria-current] { background: #efece4; color: var(--ink); }
.nav-menu { display: none; margin-left: auto; }
.nav-menu summary { list-style: none; cursor: pointer; padding: 8px 12px; border: 1px solid var(--line-2); border-radius: 10px; font-weight: 600; font-size: .9rem; }
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu[open] .menu-list { display: grid; }
.menu-list { display: none; position: absolute; right: 16px; top: 56px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); padding: 8px; min-width: 230px; }
.menu-list a { padding: 8px 12px; border-radius: 8px; color: var(--ink); text-decoration: none; }
.menu-list a:hover { background: var(--bg); }
@media (max-width: 860px) { .nav-links { display: none; } .nav-menu { display: block; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 7px; font: 600 .88rem var(--sans); padding: 8px 14px; border-radius: 10px;
  border: 1px solid var(--line-2); background: #fff; color: var(--ink); cursor: pointer; text-decoration: none; white-space: nowrap; line-height: 1.2; }
.btn:hover { border-color: var(--ink-2); color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: #fff; }
.btn.dark { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 6px 10px; font-size: .82rem; border-radius: 8px; }
.btn.ok { background: var(--green); border-color: var(--green); color: #fff; }
.btn svg { width: 16px; height: 16px; flex: none; }

/* hero */
.hero { padding: 38px 0 18px; }
.hero h1 { max-width: 20ch; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { font-size: 1.12rem; color: var(--ink-2); max-width: 64ch; margin: 0 0 14px; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.badges li { font-size: .82rem; font-weight: 600; color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 4px 11px; }
.badges li::before { content: "✓ "; color: var(--green); }

/* editor (home) */
.editor { background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); overflow: hidden; margin: 18px 0 8px; }
.ed-bar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; padding: 10px 12px; border-bottom: 1px solid var(--line); background: #faf8f3; }
.ed-bar .sep { width: 1px; height: 22px; background: var(--line-2); margin: 0 4px; }
.ed-bar .grow { flex: 1; }
.seg { display: inline-flex; background: #efece4; border-radius: 10px; padding: 3px; }
.seg button { border: 0; background: transparent; font: 600 .84rem var(--sans); padding: 6px 12px; border-radius: 8px; color: var(--ink-2); cursor: pointer; }
.seg button[aria-selected="true"] { background: #fff; color: var(--ink); box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.ed-panes { display: grid; grid-template-columns: 1fr 1fr; min-height: 520px; }
.ed-pane { display: flex; flex-direction: column; min-width: 0; }
.ed-pane + .ed-pane { border-left: 1px solid var(--line); }
.pane-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; font: 600 .74rem var(--sans); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); padding: 7px 12px; border-bottom: 1px solid var(--line); }
.pane-head .stat { text-transform: none; letter-spacing: 0; font-weight: 500; }
.ed-pane .code-wrap { flex: 1; border: 0; border-radius: 0; }
.ed-pane iframe, .ed-visual { flex: 1; width: 100%; border: 0; background: #fff; min-height: 460px; }
.ed-visual { padding: 18px 22px; overflow: auto; outline: none; font: 16px/1.6 Georgia, "Times New Roman", serif; }
.ed-visual:focus { box-shadow: inset 0 0 0 2px var(--accent-soft); }
.vis-bar { display: flex; flex-wrap: wrap; gap: 3px; padding: 6px 8px; border-bottom: 1px solid var(--line); background: #fff; }
.vis-bar button, .vis-bar select { font: 600 .82rem var(--sans); border: 1px solid transparent; background: transparent; border-radius: 6px; padding: 4px 8px; cursor: pointer; color: var(--ink-2); min-width: 30px; }
.vis-bar button:hover { background: var(--bg); border-color: var(--line); }
.vis-bar select { border-color: var(--line); background: #fff; }
.ed-foot { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 8px 12px; border-top: 1px solid var(--line); font-size: .8rem; color: var(--muted); background: #faf8f3; }
.ed-foot b { color: var(--ink-2); font-weight: 600; }
.clean-panel { border-bottom: 1px solid var(--line); padding: 12px; background: #fffdf8; }
.clean-panel .checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 4px 14px; }
.editor.full { position: fixed; inset: 0; z-index: 60; margin: 0; border-radius: 0; display: flex; flex-direction: column; }
.editor.full .ed-panes { flex: 1; min-height: 0; }
@media (max-width: 860px) {
  .ed-panes { grid-template-columns: 1fr; }
  .ed-pane + .ed-pane { border-left: 0; border-top: 1px solid var(--line); }
  .ed-pane iframe, .ed-visual { min-height: 340px; }
  .ed-pane .code-wrap { min-height: 320px; }
}

/* code area */
.code-wrap { display: flex; background: var(--code-bg); border: 1px solid #000; border-radius: 12px; overflow: hidden; min-height: 240px; position: relative; }
.gutter { flex: none; width: 44px; padding: 12px 8px 12px 0; text-align: right; color: #5c6070; font: 13px/1.6 var(--mono); white-space: pre; overflow: hidden; user-select: none; border-right: 1px solid var(--code-line); background: #0e1016; }
textarea.code, .code-out { flex: 1; width: 100%; min-width: 0; resize: vertical; border: 0; outline: none; background: var(--code-bg); color: var(--code-ink); font: 13px/1.6 var(--mono); padding: 12px 14px; white-space: pre; overflow: auto; tab-size: 2; caret-color: #ff8a65; }
.code-wrap textarea.code { resize: none; }
textarea.code::placeholder { color: #6a6e7c; }
.code-wrap.drag, .drop.drag { outline: 3px dashed var(--accent); outline-offset: -6px; }

/* tool shell */
.page { padding: 22px 0 40px; }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0 0 14px; padding: 0; font-size: .84rem; color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--line-2); }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
.page-head { max-width: 820px; margin-bottom: 18px; }
.kicker { font: 600 .78rem var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--accent-ink); margin: 0 0 8px; }
.lede { font-size: 1.08rem; color: var(--ink-2); margin: 0; }
.tool { background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 16px; }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.io.stack { grid-template-columns: 1fr; }
@media (max-width: 860px) { .io { grid-template-columns: 1fr; } }
.io-col { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.io-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.io-head h2, .io-head .lbl { font: 600 .8rem var(--sans); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0; }
.io-col .code-wrap { min-height: 360px; flex: 1; }
.io-col textarea.code { min-height: 360px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.opts { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; padding: 12px 2px 4px; font-size: .9rem; }
.check { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; font-size: .9rem; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }
.field { display: grid; gap: 4px; font-size: .84rem; font-weight: 600; color: var(--ink-2); }
.field input, .field select, input.inp, select.inp { font: 400 .95rem var(--sans); padding: 8px 10px; border: 1px solid var(--line-2); border-radius: 9px; background: #fff; color: var(--ink); min-width: 0; }
.field input[type=color] { padding: 2px; height: 38px; width: 60px; }
.preview-frame { width: 100%; min-height: 360px; border: 1px solid var(--line); border-radius: 12px; background: #fff; flex: 1; }
.stats { font-size: .84rem; color: var(--muted); }
.stats b { color: var(--green); }
.drop { border: 2px dashed var(--line-2); border-radius: 12px; padding: 14px; text-align: center; color: var(--muted); font-size: .9rem; }
.drop label { color: var(--accent-ink); font-weight: 600; cursor: pointer; text-decoration: underline; }
.hidden-input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.issues { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 520px; overflow: auto; }
.issues li { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; font-size: .9rem; }
.issues .lv { font: 700 .68rem var(--sans); text-transform: uppercase; letter-spacing: .06em; padding: 3px 7px; border-radius: 6px; }
.lv.error { background: #fde8e6; color: #b42318; }
.lv.warn { background: #fff4dc; color: var(--amber); }
.lv.info { background: #e8f0fe; color: #1f56c4; }
.lv.ok { background: #e3f6ec; color: var(--green); }
.issues .ln { color: var(--muted); font-size: .8rem; }
.md-out { padding: 16px 20px; border: 1px solid var(--line); border-radius: 12px; background: #fff; min-height: 360px; overflow: auto; }
.tbl-edit { overflow: auto; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.tbl-edit table { border-collapse: collapse; min-width: 100%; }
.tbl-edit td { border: 1px solid var(--line); padding: 0; min-width: 110px; }
.tbl-edit td div { padding: 7px 9px; outline: none; min-height: 1.6em; }
.tbl-edit tr:first-child td { background: #f6f3ec; font-weight: 600; }
.chars { width: 100%; border-collapse: collapse; font-size: .92rem; }
.chars th, .chars td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); }
.chars td:first-child { font-size: 1.35rem; text-align: center; width: 54px; }
.chars td code { cursor: pointer; }
.chars tr:hover td { background: #faf8f3; }

/* content */
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 40px; margin-top: 30px; align-items: start; }
.article-grid.solo { grid-template-columns: minmax(0, 780px); }
@media (max-width: 960px) { .article-grid { grid-template-columns: 1fr; } .toc { display: none; } }
.prose { max-width: 780px; }
.prose p, .prose li { color: var(--ink-2); }
.prose h2 { scroll-margin-top: 80px; }
.prose table { width: 100%; border-collapse: collapse; font-size: .93rem; margin: 1em 0; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.prose th { background: #f3f0e8; font-weight: 600; color: var(--ink); }
.prose pre { background: var(--code-bg); color: var(--code-ink); padding: 14px 16px; border-radius: 12px; overflow-x: auto; line-height: 1.55; }
.prose blockquote { margin: 1em 0; padding: 4px 16px; border-left: 4px solid var(--accent); background: var(--accent-soft); border-radius: 0 10px 10px 0; }
.answer { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; padding: 14px 18px; margin: 0 0 18px; }
.answer p { margin: 0; color: var(--ink); }
.answer strong:first-child { display: block; font: 700 .74rem var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--accent-ink); margin-bottom: 4px; }
.steps-list { padding-left: 1.2em; }
.steps-list li { margin-bottom: .45em; }
.note { font-size: .9rem; background: #eef6f1; border: 1px solid #cfe7da; border-radius: 10px; padding: 10px 14px; color: #1d5b3c !important; }
.meta-line { font-size: .86rem; color: var(--muted); margin: 10px 0 0; }
.toc { position: sticky; top: 80px; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; font-size: .88rem; }
.toc b { display: block; font: 700 .72rem var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-bottom: 6px; }
.toc ol { margin: 0; padding-left: 1.1em; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--accent); }
.faq details { border: 1px solid var(--line); border-radius: 12px; background: #fff; margin-bottom: 8px; }
.faq summary { cursor: pointer; padding: 12px 16px; font-weight: 600; list-style: none; position: relative; padding-right: 40px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 16px; top: 10px; font-size: 1.2rem; color: var(--muted); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0; padding: 0 16px 14px; }

/* cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.card { display: flex; flex-direction: column; gap: 4px; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 15px 16px; text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); color: var(--ink); }
.card .k { font: 700 .68rem var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--accent-ink); }
.card b { font: 700 1.02rem var(--display); }
.card span.d { font-size: .88rem; color: var(--muted); line-height: 1.5; }
.section { padding: 26px 0; }
.section > h2:first-child, .section .h2 { margin-top: 0; }
.sub { color: var(--muted); margin: -4px 0 18px; max-width: 70ch; }
.feat { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.feat div { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.feat h3 { margin: 0 0 4px; font-size: 1rem; }
.feat p { margin: 0; font-size: .92rem; color: var(--ink-2); }
.cmp { width: 100%; border-collapse: collapse; background: #fff; border-radius: 14px; overflow: hidden; font-size: .92rem; }
.cmp-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
.cmp th, .cmp td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
.cmp th { background: #f3f0e8; }
.cmp td.y { color: var(--green); font-weight: 700; }
.cmp td.n { color: #b42318; }
.cmp col.us { background: #fff8f5; }

/* footer */
.foot { border-top: 1px solid var(--line); background: #f4f1ea; padding: 36px 0 22px; margin-top: 30px; font-size: .9rem; }
.foot-cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 860px) { .foot-cols { grid-template-columns: 1fr 1fr; } .foot-cols > div:first-child { grid-column: 1 / -1; } }
.foot h4 { font: 700 .74rem var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 8px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 5px; }
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--accent); }
.foot p { color: var(--muted); }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line-2); margin-top: 22px; padding-top: 14px; font-size: .82rem; color: var(--muted); }
.foot-base p { margin: 0; }

[hidden] { display: none !important; }
.vis-panel { flex: 1; display: flex; flex-direction: column; min-height: 0; }
@media (max-width: 600px) { #newtab, #full, #sample { display: none; } }