@font-face {
  font-family: "Inter";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("/assets/fonts/inter-latin-wght-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("/assets/fonts/inter-latin-ext-wght-normal.woff2") format("woff2");
  unicode-range: U+0100-02AF, U+0304, U+0308, U+0329, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-display: swap;
  font-weight: 100 800;
  src: url("/assets/fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2");
}

:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #14181d;
  --muted: #5b6470;
  --border: #e2e6eb;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #e8effd;
  --ok: #0f9d58;
  --warn: #b45309;
  --err: #dc2626;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .1);
  --maxw: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216;
    --panel: #161b22;
    --text: #e8eaed;
    --muted: #9aa4b2;
    --border: #262d36;
    --accent: #5b8dfa;
    --accent-hover: #7ba4fb;
    --accent-soft: #1b2739;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1216;
  --panel: #161b22;
  --text: #e8eaed;
  --muted: #9aa4b2;
  --border: #262d36;
  --accent: #5b8dfa;
  --accent-hover: #7ba4fb;
  --accent-soft: #1b2739;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4);
}

:root[data-theme="light"] {
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font: 16px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main { flex: 1; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; width: 100%; }
.section { margin-top: 40px; }
.muted { color: var(--muted); }
h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 1.25rem; margin: 0 0 16px; }
h3 { margin: 0; }

.site-header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: inline-flex; align-items: center; gap: 9px; font-size: 1.2rem; font-weight: 800; color: var(--text); }
.logo span { color: var(--accent); }
.logo-mark { display: block; width: 26px; height: 26px; border-radius: 7px; flex: 0 0 auto; }
.logo:hover { text-decoration: none; }
.site-nav { display: flex; align-items: center; gap: 18px; }
.site-nav a { color: var(--muted); font-weight: 600; font-size: .95rem; }
.site-nav a:hover { color: var(--accent); text-decoration: none; }
.site-nav a.nav-link-current { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  cursor: pointer;
  z-index: 40;
}
.burger span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--text);
  transition: transform .22s ease, opacity .22s ease;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 20, .45);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease;
  z-index: 25;
}
.nav-backdrop.show { opacity: 1; pointer-events: auto; }

.nav-close { display: none; }

body.nav-open { overflow: hidden; }

@media (max-width: 820px) {
  .burger { display: flex; }
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 64px 16px 24px;
    background: var(--panel);
    border-left: 1px solid var(--border);
    box-shadow: -16px 0 44px rgba(10, 14, 20, .2);
    transform: translateX(105%);
    transition: transform .24s ease;
    z-index: 30;
    overflow-y: auto;
  }
  .site-nav.open { transform: translateX(0); }
  .site-nav a {
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 1.02rem;
  }
  .site-nav a:hover { background: var(--accent-soft); text-decoration: none; }
  .site-nav a.nav-link-current { background: var(--accent-soft); text-decoration: none; }
  .site-nav .theme-toggle { margin-top: 16px; align-self: flex-start; }
  .nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--panel);
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
  }
}

.hero { padding: 48px 0 8px; text-align: center; }
.hero .lead { max-width: 640px; margin: 0 auto 22px; color: var(--muted); font-size: 1.05rem; }
.search-wrap { max-width: 560px; margin: 0 auto; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px; }
.chip {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 14px;
  font: inherit;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }

.card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  color: inherit;
  transition: transform .12s ease, border-color .12s ease;
}
.card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.card .tag {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; letter-spacing: .5px; font-size: .9rem;
}
.card p { margin: 0; color: var(--muted); font-size: .92rem; }
.card .cat { margin-top: auto; font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.card.disabled { opacity: .55; cursor: default; }
.card.disabled:hover { transform: none; border-color: var(--border); }
.card .badge {
  align-self: flex-start;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: .72rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 3px 10px;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.breadcrumb { margin: 22px 0 10px; font-size: .88rem; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.panel + .panel { margin-top: 16px; }

label { display: block; font-weight: 600; margin: 0 0 6px; font-size: .92rem; }
input[type=text], input[type=number], input[type=search], input[type=email], input[type=url], input[type=password], input[type=date], input[type=tel], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { min-height: 160px; resize: vertical; }
.field { margin-bottom: 14px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 640px) { .grid2, .grid3 { grid-template-columns: 1fr; } }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-top: 14px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.stat b { display: block; font-size: 1.35rem; }
.stat span { color: var(--muted); font-size: .85rem; }

.result { margin-top: 16px; }
.result .big { font-size: 1.6rem; font-weight: 800; }
.alert { border-radius: 10px; padding: 12px 14px; margin-top: 12px; font-size: .95rem; }
.alert.ok { background: rgba(15, 157, 88, .12); color: var(--ok); }
.alert.warn { background: rgba(180, 83, 9, .12); color: var(--warn); }
.alert.err { background: rgba(220, 38, 38, .12); color: var(--err); }

.table-wrap { overflow-x: auto; margin-top: 14px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.file-list { margin-top: 14px; display: flex; flex-direction: column; gap: 10px; }
.file-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--panel);
}
.file-row .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-row .size { color: var(--muted); font-size: .85rem; white-space: nowrap; }
.file-row .actions { display: flex; gap: 6px; }
.file-row .actions .btn { padding: 6px 10px; font-size: .85rem; }

.keys { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.keys .btn { padding: 14px 0; font-size: 1.05rem; }
.keys .span2 { grid-column: span 2; }
.calc-display {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  text-align: right;
  margin-bottom: 12px;
}
.calc-display .expr { color: var(--muted); font-size: .9rem; min-height: 1.2em; word-break: break-all; }
.calc-display .out { font-size: 2rem; font-weight: 800; word-break: break-all; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: .9rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
  z-index: 50;
}
.toast.show { opacity: 1; }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--panel);
  margin-top: 56px;
  padding: 26px 0;
}
.footer-inner p { margin: 4px 0; font-size: .9rem; color: var(--muted); }
.footer-inner a { color: var(--muted); }

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

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

.article-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; align-items: start; }
@media (max-width: 900px) { .article-wrap { grid-template-columns: 1fr; } }

.prose { max-width: 100%; }
.prose h2 { margin: 36px 0 12px; font-size: 1.35rem; line-height: 1.3; }
.prose h3 { margin: 26px 0 10px; font-size: 1.1rem; }
.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin-bottom: 7px; }
.prose img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--border); }
.prose code { background: var(--accent-soft); border-radius: 6px; padding: 2px 6px; font-size: .9em; }
.prose blockquote {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: var(--panel);
  border-radius: 0 10px 10px 0;
  color: var(--muted);
}
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 28px 0; }

.meta { color: var(--muted); font-size: .9rem; margin: 0 0 20px; }

.callout {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 0 0 24px;
  box-shadow: var(--shadow);
}
.callout.warn { border-left-color: var(--warn); }
.callout p:last-child, .callout ul:last-child, .callout ol:last-child { margin-bottom: 0; }
.callout > strong { display: block; margin-bottom: 8px; }
.callout ol, .callout ul { margin: 6px 0 0; }

.share { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0; }
.share .btn { padding: 8px 13px; font-size: .9rem; }

.sidebar { position: sticky; top: 80px; }
.sidebar .panel + .panel { margin-top: 16px; }
.sidebar h3 { font-size: .95rem; margin-bottom: 10px; }

.comments { margin-top: 44px; }
.comment {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 15px;
  background: var(--panel);
  margin-bottom: 10px;
}
.comment .who { font-weight: 700; }
.comment .when { color: var(--muted); font-size: .82rem; margin-left: 8px; }
.comment .body { margin-top: 6px; white-space: pre-wrap; overflow-wrap: anywhere; }
.comment .reply {
  margin: 10px 0 0 14px;
  padding: 10px 13px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
}
.comment .reply .who { color: var(--accent); }
.hp {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}

.hub-intro { padding: 36px 0 6px; text-align: center; }
.hub-intro .lead { max-width: 640px; margin: 0 auto 20px; color: var(--muted); font-size: 1.05rem; }
.card .when { color: var(--muted); font-size: .8rem; }
.card .excerpt { color: var(--muted); font-size: .92rem; margin: 0; }

h1, h2, h3 { text-wrap: balance; }
.prose p, .prose li { line-height: 1.7; }
.prose p { text-wrap: pretty; }
.stat b, .file-row .size, .calc-display .out, .calc-display .expr, td.num, th.num { font-variant-numeric: tabular-nums; }

code, pre, .mono, textarea.mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
code, pre, .mono { font-size: .92em; }
textarea.mono { font-size: .92rem; line-height: 1.6; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  border-radius: 999px;
  padding: 5px 12px;
  font: inherit;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 480px) {
  .theme-toggle { padding: 4px 9px; font-size: .78rem; }
}

.cookie-banner {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%) translateY(130%);
  width: min(680px, calc(100% - 24px));
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(16, 24, 40, .22);
  padding: 16px 18px;
  z-index: 60;
  transition: transform .28s ease;
}
.cookie-banner.show { transform: translateX(-50%) translateY(0); }
.cookie-banner p { margin: 0 0 12px; font-size: .9rem; }
.cookie-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.cookie-actions .btn { padding: 8px 14px; font-size: .88rem; }
.cookie-manage {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  font-size: .9rem;
  color: var(--muted);
  cursor: pointer;
  text-decoration: underline;
}
.cookie-manage:hover { color: var(--accent); }

.w-auto { width: auto; }
.check-line, .check-line-center { display: flex; gap: 8px; font-weight: 400; }
.check-line { align-items: flex-start; }
.check-line-center { align-items: center; }
.mb-14 { margin-bottom: 14px; }
.mt-6 { margin-top: 6px; }
.mt-12 { margin-top: 12px; }
.mt-14 { margin-top: 14px; }
.mt-16 { margin-top: 16px; }
.mt-28 { margin-top: 28px; }
.mt-40 { margin-top: 40px; }
.small { font-size: .85rem; }
.small-90 { font-size: .9rem; }
.m-0 { margin: 0; }
.fs-110 { font-size: 1.1rem; }
.center { text-align: center; }
.justify-center { justify-content: center; }
.between { display: flex; justify-content: space-between; }
.narrow { max-width: 640px; }
.narrow-sm { max-width: 420px; }
.img-fluid { max-width: 100%; height: auto; }
.wave-canvas { width: 100%; height: 140px; display: block; border-radius: 10px; border: 1px solid var(--border); }
.cam-video { width: 100%; max-width: 520px; border-radius: 10px; border: 1px solid var(--border); margin-top: 14px; display: none; }

.sci-input {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 1.25rem;
  text-align: right;
  padding: 6px 0;
}
.sci-input:focus { outline: none; }
.sci-keys { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.sci-keys .btn { padding: 12px 0; font-size: 1rem; }
.sci-keys .btn.fn { font-size: .88rem; }
.sci-keys .btn.op { color: var(--accent); font-weight: 700; }
.sci-keys .btn.eq { background: var(--accent); border-color: var(--accent); color: #fff; }
.sci-history { display: flex; flex-direction: column; gap: 6px; }
.sci-history-row {
  text-align: left;
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: .9rem;
  color: var(--text);
  cursor: pointer;
}
.sci-history-row:hover { border-color: var(--accent); color: var(--accent); }

.inv-head, .inv-row { display: grid; grid-template-columns: 1fr 70px 100px 90px auto; gap: 8px; align-items: center; }
.inv-head { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin-bottom: 6px; }
.inv-head span:nth-child(2), .inv-head span:nth-child(3), .inv-head span:nth-child(4) { text-align: right; }
.inv-row { margin-bottom: 8px; }
.inv-row .inv-line-total { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
@media (max-width: 640px) { .inv-head, .inv-row { grid-template-columns: 1fr 54px 80px 70px auto; } }

.rs-stage { position: relative; display: inline-block; max-width: 100%; border: 1px solid var(--border); border-radius: 10px; }
.rs-stage canvas { display: block; max-width: 100%; height: auto; }

.crop-stage { position: relative; display: inline-block; max-width: 100%; }
.crop-stage img { display: block; max-width: 100%; height: auto; }
.crop-overlay {
  position: absolute;
  border: 2px dashed #ffffff;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, .45);
  cursor: move;
  touch-action: none;
}
.crop-overlay.circle { border-radius: 50%; }

.op-line { display: flex; gap: 16px; align-items: center; font-weight: 600; flex-wrap: wrap; }

.st-bar-wrap { background: var(--border); border-radius: 999px; height: 8px; min-width: 80px; }
.st-bar { height: 8px; border-radius: 999px; background: var(--accent); }
.st-bar-col { width: 35%; }

.unit-row { display: grid; grid-template-columns: 1fr 120px; gap: 8px; }

.internal-nav { flex-wrap: wrap; row-gap: 4px; }
.internal-nav a { font-size: .9rem; }

details summary { cursor: pointer; }
details summary:hover { color: var(--accent); }

html { -webkit-text-size-adjust: 100%; }

@media (pointer: coarse) {
  .btn { min-height: 44px; }
  .chip { padding: 8px 16px; }
}

@media (max-width: 640px) {
  .container { padding: 0 14px; }
  .hero { padding: 32px 0 4px; }
  .site-nav { gap: 12px; font-size: .9rem; }
  .panel { padding: 16px; }
  .section { margin-top: 28px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}