:root {
  --bg: #f6f8f8;
  --surface: #ffffff;
  --surface-2: #eef3f2;
  --text: #13201e;
  --muted: #5b6b68;
  --line: #dbe3e1;
  --accent: #0f766e;
  --accent-2: #0d9488;
  --accent-ink: #ffffff;
  --accent-soft: #d9f2ee;
  --warn-bg: #fff4e0;
  --warn-ink: #7a4a00;
  --bad: #b42318;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 40, 36, .06), 0 6px 24px rgba(16, 40, 36, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1413; --surface: #141d1c; --surface-2: #1b2725; --text: #e6efed; --muted: #9db0ac;
    --line: #2a3936; --accent: #2dd4bf; --accent-2: #5eead4; --accent-ink: #062a26; --accent-soft: #123a35;
    --warn-bg: #3a2a0c; --warn-ink: #ffd591; --bad: #ff7b6e; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1413; --surface: #141d1c; --surface-2: #1b2725; --text: #e6efed; --muted: #9db0ac;
  --line: #2a3936; --accent: #2dd4bf; --accent-2: #5eead4; --accent-ink: #062a26; --accent-soft: #123a35;
  --warn-bg: #3a2a0c; --warn-ink: #ffd591; --bad: #ff7b6e; --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Hebrew", "Noto Sans Arabic", "Noto Sans Devanagari", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(1.7rem, 4vw, 2.6rem); letter-spacing: -.01em; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1rem; margin-block-start: 1.2em; }
.wrap { max-inline-size: 1200px; margin-inline: auto; padding-inline: 16px; }
.muted { color: var(--muted); }
.sr { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip { position: absolute; inset-inline-start: -999px; }
.skip:focus { inset-inline-start: 8px; top: 8px; background: var(--surface); padding: 8px; z-index: 10; }

/* top bar */
.topbar { background: var(--surface); border-block-end: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.topbar-in { display: flex; align-items: center; justify-content: space-between; block-size: 60px; }
.brand { font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; display: flex; gap: 8px; align-items: center; }
.logo { inline-size: 34px; block-size: 34px; flex: none; }
.brand-ups { color: #ea580c; }
@media (prefers-color-scheme: dark) { .brand-ups { color: #fb923c; } }
.topbar-in { gap: 12px; }
.main-nav { display: flex; gap: 4px; margin-inline-end: auto; margin-inline-start: 16px; }
.main-nav a { color: var(--muted); text-decoration: none; font-weight: 600; padding: 6px 10px; border-radius: 8px; white-space: nowrap; }
.main-nav a:hover { color: var(--text); background: var(--surface-2); }
.main-nav a[aria-current] { color: var(--accent); }
@media (max-width: 560px) {
  .topbar-in { flex-wrap: wrap; block-size: auto; padding-block: 8px; }
  .main-nav { order: 3; inline-size: 100%; margin: 0; justify-content: center; }
}
.table-scroll { overflow-x: auto; }
.res-table { inline-size: 100%; border-collapse: collapse; }
.res-table th, .res-table td { padding: 8px 6px; text-align: start; border-block-end: 1px solid var(--line); vertical-align: top; }
.res-table thead th { font-size: .82rem; color: var(--muted); }
.res-table td:last-child { white-space: nowrap; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; margin-block-start: 8px; }
.lang-menu { position: relative; }
.lang-menu summary {
  list-style: none; cursor: pointer; display: flex; gap: 6px; align-items: center;
  border: 2px solid var(--accent); color: var(--accent); background: var(--accent-soft);
  padding: 6px 14px; border-radius: 999px; font-weight: 700; user-select: none;
}
.lang-menu summary::-webkit-details-marker { display: none; }
.lang-menu ul {
  position: absolute; inset-inline-end: 0; top: calc(100% + 8px); margin: 0; padding: 6px; list-style: none;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
  min-inline-size: 200px; max-block-size: 70vh; overflow: auto; z-index: 20;
}
.lang-menu li a { display: flex; justify-content: space-between; gap: 12px; padding: 8px 12px; border-radius: 8px; color: var(--text); text-decoration: none; }
.lang-menu li a:hover, .lang-menu li a[aria-current] { background: var(--surface-2); }
.lang-menu li a small { color: var(--muted); }
.lang-suggest { display: flex; justify-content: center; align-items: center; gap: 10px; padding: 8px 16px; background: var(--accent-soft); font-weight: 600; }
.lang-suggest[hidden] { display: none; }

/* hero */
.hero { padding-block: 40px 24px; text-align: center; }
.lead { font-size: 1.12rem; color: var(--muted); max-inline-size: 760px; margin: 0 auto 16px; }
.trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; list-style: none; padding: 0; margin: 0; color: var(--accent); font-weight: 600; font-size: .95rem; }

/* layout */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 20px; align-items: start; padding-block-end: 32px; }
.col-main { display: grid; gap: 20px; min-inline-size: 0; }
.col-side { position: sticky; top: 76px; display: grid; gap: 16px; }
@media (max-width: 960px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .col-side { position: static; }
}
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); min-inline-size: 0; }
.num { display: inline-grid; place-items: center; inline-size: 28px; block-size: 28px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: .9rem; margin-inline-end: 10px; vertical-align: 2px; }

/* tabs */
.tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin-block: 14px 18px; }
@media (max-width: 640px) { .tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.tabs [role=tab] {
  text-align: start; border: 2px solid var(--line); background: var(--surface-2); color: var(--text);
  border-radius: 12px; padding: 10px 12px; cursor: pointer; font: inherit; display: grid; gap: 2px;
}
.tabs [role=tab] small { color: var(--muted); font-size: .8rem; }
.tabs [role=tab][aria-selected=true] { border-color: var(--accent); background: var(--accent-soft); }
.steps { padding-inline-start: 1.3em; margin: 0 0 14px; }
.steps li { margin-block-end: 8px; }
.steps .btn { margin-inline-start: 6px; }
.privacy { font-size: .9rem; color: var(--muted); margin-block-end: 0; }

/* form controls */
input, select, textarea {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 10px; min-inline-size: 0;
}
input:focus, select:focus, textarea:focus, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { inline-size: 100%; resize: vertical; font-family: ui-monospace, Consolas, monospace; font-size: .85rem; }
.num-in { inline-size: 72px; }
.field { margin-block-end: 16px; }
.field > label, .lbl { display: block; font-weight: 600; margin-block-end: 6px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row > input:not(.num-in):not([type=checkbox]) { flex: 1 1 200px; }
.check { display: inline-flex; gap: 6px; align-items: center; }
.btn {
  font: inherit; font-weight: 600; border: 1px solid var(--line); background: var(--surface-2); color: var(--text);
  border-radius: 10px; padding: 8px 14px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 10px; font-size: .9rem; }
.icon-btn { border: 0; background: transparent; color: var(--muted); font-size: 1.3rem; cursor: pointer; line-height: 1; padding: 4px 8px; border-radius: 8px; }
.icon-btn:hover { color: var(--bad); background: var(--surface-2); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font: inherit; font-size: .9rem; border: 1px solid var(--line); background: var(--surface-2); color: var(--text); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.drop { border: 2px dashed var(--line); border-radius: 12px; padding: 12px; display: grid; gap: 10px; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone { place-items: center; text-align: center; padding: 28px 12px; cursor: pointer; font-weight: 600; }
.dropzone input { max-inline-size: 100%; }

/* presets */
.presets { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; }
.preset { font: inherit; text-align: start; display: grid; gap: 4px; border: 2px solid var(--line); background: var(--surface-2); color: var(--text); border-radius: 12px; padding: 14px; cursor: pointer; }
.preset span { font-size: 1.6rem; }
.preset small { color: var(--muted); }
.preset:hover { border-color: var(--accent); }

/* device list */
.list-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.empty { color: var(--muted); text-align: center; padding: 18px; background: var(--surface-2); border-radius: 10px; margin: 0; }
.dev-table { inline-size: 100%; border-collapse: collapse; }
.dev-table th, .dev-table td { padding: 6px; text-align: start; border-block-end: 1px solid var(--line); vertical-align: middle; }
.dev-table thead th { font-size: .82rem; color: var(--muted); font-weight: 600; }
.dev-table .grp th { background: var(--surface-2); font-size: .85rem; }
.dev-table input { inline-size: 76px; padding: 4px 6px; }
.dev-name { inline-size: 100%; }
@media (max-width: 640px) {
  .dev-table thead { display: none; }
  .dev-table tr:not(.grp) { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 4px 8px; padding-block: 8px; border-block-end: 1px solid var(--line); }
  .dev-table td { border: 0; padding: 2px; }
  .dev-table td.dev-name { grid-column: 1 / -1; }
  .dev-table td[data-label]:not(.dev-name)::before { content: attr(data-label); display: block; font-size: .75rem; color: var(--muted); }
  .dev-table input { inline-size: 100%; }
  .dev-table .grp { display: block; }
  .dev-table .grp th { display: block; }
}

/* prefs */
.prefs { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.prefs label { display: grid; gap: 6px; font-weight: 600; }

/* result */
.result h2 { margin-block-end: 10px; }
.big { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; background: var(--accent); color: var(--accent-ink); border-radius: 12px; padding: 14px 16px; }
.big .va { font-size: 2rem; font-weight: 800; }
.big .w { font-size: 1.2rem; font-weight: 700; opacity: .9; }
.minline { font-weight: 600; margin-block: 10px 6px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0 4px; }
.stats div { background: var(--surface-2); border-radius: 10px; padding: 8px; }
.stats dt { font-size: .75rem; color: var(--muted); }
.stats dd { margin: 0; font-weight: 700; font-size: 1.05rem; }
.note { font-size: .82rem; color: var(--muted); margin-block: 6px; }
.warn { background: var(--warn-bg); color: var(--warn-ink); border-radius: 10px; padding: 8px 10px; font-size: .9rem; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.checks li { padding-inline-start: 26px; position: relative; font-size: .93rem; }
.checks li::before { content: "✓"; position: absolute; inset-inline-start: 0; color: var(--accent); font-weight: 800; }
.checks li.x::before { content: "✕"; color: var(--bad); }
.checks li.warn-li::before { content: "!"; color: var(--warn-ink); }
.verdict { font-weight: 800; border-radius: 10px; padding: 10px 12px; margin-block: 12px 8px; }
.verdict.good { background: var(--accent-soft); color: var(--accent); }
.verdict.bad { background: var(--warn-bg); color: var(--warn-ink); }
#check .prefs { grid-template-columns: 1fr 1fr; }
#check input { inline-size: 100%; }
.after-scan { background: var(--warn-bg); color: var(--warn-ink); border-radius: 10px; padding: 10px 12px; font-weight: 600; }
.after-scan[hidden] { display: none; }
.bars { display: grid; gap: 6px; }
.bar { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) auto; gap: 8px; align-items: center; font-size: .85rem; }
.bl { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bt { background: var(--surface-2); border-radius: 99px; block-size: 8px; overflow: hidden; }
.bt span { display: block; block-size: 100%; background: var(--accent-2); border-radius: 99px; }
.bv { font-variant-numeric: tabular-nums; color: var(--muted); }
.models { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.models li { border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.tag { font-size: .7rem; background: var(--surface-2); border-radius: 6px; padding: 1px 6px; margin-inline-end: 6px; color: var(--muted); }
.ad-slot:not([hidden]) { min-block-size: 250px; }

/* content */
.content { padding-block: 24px; }
.content article { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-block-end: 14px; }
.content article h3 { margin-block-start: 0; font-size: 1.1rem; }
.content article p:last-child { margin-block-end: 0; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; margin-block-end: 10px; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin-block-end: 0; }

.footer { border-block-start: 1px solid var(--line); background: var(--surface); padding-block: 24px; margin-block-start: 24px; font-size: .9rem; }
.foot-langs { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-block: 10px; }

.toast {
  position: fixed; inset-inline: 16px; bottom: 16px; margin-inline: auto; max-inline-size: 520px; z-index: 30;
  background: var(--text); color: var(--bg); padding: 12px 16px; border-radius: 12px; font-weight: 600;
  opacity: 0; transform: translateY(10px); transition: .2s; pointer-events: none; text-align: center;
}
.toast.show { opacity: 1; transform: none; }
.toast.bad { background: var(--bad); color: #fff; }