/* =====================================================================================
   KnifeData design system — ONE stylesheet, every page.  docs/DESIGN_SYSTEM.md explains it.

   Order: tokens → base → chrome (skip link, top bar, footer) → components → libraries.dev
   effect ports (.fx-*) → utilities.  Page files add only what is unique to that page.

   Contrast: every ink/ground pairing below is validated ≥ 4.5:1 (text) and ≥ 3:1 (UI) by
   scripts/site_check.mjs. Change a token, run `make site-check`.
   Targets: every interactive element is ≥ 44px tall on coarse pointers and ≥ 32px on fine
   pointers (WCAG 2.2 2.5.8 floor is 24px; 44px is the touch recommendation we design to).
   Type floor: nothing renders below 12px.
   ===================================================================================== */

/* ---------- 1. TOKENS ---------- */
:root {
  color-scheme: light dark;
  /* light "paper" surface */
  --ground: #eef1f6;  --paper: #ffffff;  --line: #dfe4ec;  --grid: #e8ecf2;
  --ink: #0e1420;     --ink2: #414b5a;   --ink3: #5b6573;
  --accent: #2448ff;  --accent-strong: #1a37d6;  --accent-ink: #ffffff;  --accent-soft: rgba(36,72,255,.08);
  --amber: #9c5008;   --ok: #0b6e4b;     --ring: #0e1420;
  --shadow: 0 1px 2px rgba(10,14,22,.05), 0 14px 34px rgba(10,14,22,.07);
  /* the instrument (always dark) — used by .surface-dark and by dark scheme */
  --i-ground: #0a0d13; --i-paper: #121722; --i-line: #232b39; --i-grid: #1b2230;
  --i-ink: #eef2f8;    --i-ink2: #aab4c4;  --i-ink3: #8a94a4;
  --i-accent: #6d8bff; --i-accent-strong: #8ba3ff; --i-accent-ink: #0a0d13; --i-accent-soft: rgba(109,139,255,.12);
  --i-amber: #e6963c;  --i-ok: #4bd08a;    --i-ring: #ffffff;
  --i-shadow: 0 1px 2px rgba(0,0,0,.3), 0 16px 38px rgba(0,0,0,.45);
  --steel: #cdd6e6;
  /* type */
  --sans: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --exp:  "Archivo Expanded", "Archivo", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --fs-kicker: 12px; --fs-fine: 13px; --fs-small: 14px; --fs-body: 16px;
  --fs-lede: clamp(17px, 2vw, 19px); --fs-h3: 19px; --fs-h2: clamp(26px, 3.6vw, 38px); --fs-h1: clamp(38px, 6vw, 72px);
  --fs-display: clamp(30px, 4.6vw, 46px);
  /* shape & space */
  --r-s: 8px; --r: 14px; --r-l: 18px; --r-pill: 999px;
  --maxw: 1120px; --gutter: 20px;
  --tap: 44px;             /* minimum interactive height on touch */
  --tap-fine: 32px;        /* minimum interactive height on fine pointers */
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --ground: var(--i-ground); --paper: var(--i-paper); --line: var(--i-line); --grid: var(--i-grid);
  --ink: var(--i-ink); --ink2: var(--i-ink2); --ink3: var(--i-ink3);
  --accent: var(--i-accent); --accent-strong: var(--i-accent-strong); --accent-ink: var(--i-accent-ink); --accent-soft: var(--i-accent-soft);
  --amber: var(--i-amber); --ok: var(--i-ok); --ring: var(--i-ring); --shadow: var(--i-shadow);
} }
:root[data-theme="dark"] {
  --ground: var(--i-ground); --paper: var(--i-paper); --line: var(--i-line); --grid: var(--i-grid);
  --ink: var(--i-ink); --ink2: var(--i-ink2); --ink3: var(--i-ink3);
  --accent: var(--i-accent); --accent-strong: var(--i-accent-strong); --accent-ink: var(--i-accent-ink); --accent-soft: var(--i-accent-soft);
  --amber: var(--i-amber); --ok: var(--i-ok); --ring: var(--i-ring); --shadow: var(--i-shadow);
}
/* A dark band inside any scheme: remap the semantic tokens to the instrument set. */
.surface-dark {
  --ground: var(--i-ground); --paper: var(--i-paper); --line: var(--i-line); --grid: var(--i-grid);
  --ink: var(--i-ink); --ink2: var(--i-ink2); --ink3: var(--i-ink3);
  --accent: var(--i-accent); --accent-strong: var(--i-accent-strong); --accent-ink: var(--i-accent-ink); --accent-soft: var(--i-accent-soft);
  --amber: var(--i-amber); --ok: var(--i-ok); --ring: var(--i-ring); --shadow: var(--i-shadow);
  background: var(--ground); color: var(--ink);
}
@media (pointer: fine) { :root { --tap: var(--tap-fine); } }

/* ---------- 2. BASE ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 400 var(--fs-body)/1.6 var(--sans);
       -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
h1, h2, h3, h4 { margin: 0; letter-spacing: -.025em; text-wrap: balance; }
p { margin: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
/* links inside running text are always underlined (they cannot rely on color alone) */
p a, .lede a, .note a, td a, li:not(.nav li) a:not(.btn):not(.btn-ghost):not(.btn-metal) { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.foot ul a, .wall a, .chips a { text-decoration: none; }
button { font: inherit; color: inherit; }
img, svg { max-width: 100%; }
table { border-collapse: collapse; }
:focus-visible { outline: 3px solid var(--ring); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--accent); color: var(--accent-ink); }
.tnum { font-variant-numeric: tabular-nums; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* type */
.h1 { font-family: var(--exp); font-weight: 800; font-size: var(--fs-h1); line-height: .98; letter-spacing: -.04em; }
.h2 { font-family: var(--exp); font-weight: 800; font-size: var(--fs-h2); line-height: 1.06; }
.h3 { font-family: var(--exp); font-weight: 800; font-size: var(--fs-h3); letter-spacing: -.02em; }
.lede { font-size: var(--fs-lede); color: var(--ink2); max-width: 56ch; }
.kicker { font-family: var(--mono); font-size: var(--fs-kicker); font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--ink3); }
.eyebrow { font-family: var(--mono); font-size: var(--fs-kicker); font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.fine { font-family: var(--mono); font-size: var(--fs-fine); color: var(--ink3); line-height: 1.75; }
.note { font-size: var(--fs-small); color: var(--ink3); line-height: 1.55; }
.display { font-family: var(--exp); font-weight: 800; font-size: var(--fs-display); line-height: 1; letter-spacing: -.03em; color: var(--ink); }
.display small { font-family: var(--sans); font-size: max(12px, .38em); font-weight: 600; color: var(--ink2); letter-spacing: 0; }

/* ---------- 3. CHROME ---------- */
.skip { position: absolute; left: 12px; top: -80px; z-index: 100; background: var(--i-accent); color: var(--i-accent-ink);
        font-weight: 700; padding: 12px 16px; border-radius: var(--r-s); }
.skip:focus { top: 12px; outline-color: #fff; }

.topbar { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--i-ground) 92%, transparent);
          backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--i-line); color: var(--i-ink); }
.topbar-in { max-width: var(--maxw); margin: 0 auto; display: flex; align-items: center; gap: 12px; padding: 6px var(--gutter); min-height: 60px; }
.brand { font-family: var(--exp); font-weight: 800; font-size: 18px; letter-spacing: -.02em; color: var(--i-ink); white-space: nowrap;
         display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 6px; margin-left: -6px; border-radius: var(--r-s); }
.brand b { color: var(--i-accent); font-weight: 800; }
.brand:hover { text-decoration: none; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.nav a { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 12px; border-radius: var(--r-s);
         font-family: var(--mono); font-size: 13px; letter-spacing: .04em; text-transform: uppercase; color: var(--i-ink2); }
.nav a:hover { color: var(--i-ink); background: rgba(255,255,255,.05); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--i-ink); box-shadow: inset 0 -2px 0 var(--i-accent); border-radius: var(--r-s) var(--r-s) 0 0; }
.nav a.cta { background: var(--i-accent); color: var(--i-accent-ink); font-family: var(--sans); font-weight: 700; text-transform: none; letter-spacing: 0; font-size: 14px; padding: 0 16px; margin-left: 6px; }
.nav a.cta:hover { background: var(--i-accent-strong); }
.topbar .ring-dark:focus-visible { outline-color: #fff; }
@media (max-width: 720px) { .nav a.lk { display: none; } .nav { gap: 2px; } }

.foot { background: var(--i-ground); color: var(--i-ink2); border-top: 1px solid var(--i-line); padding: 48px 0 56px; }
.foot .fgrid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
@media (max-width: 760px) { .foot .fgrid { grid-template-columns: 1fr; } }
.foot .brand { font-size: 22px; }
.foot .k { font-family: var(--mono); font-size: var(--fs-kicker); letter-spacing: .12em; text-transform: uppercase; color: var(--i-ink3); margin-bottom: 8px; }
.foot p { font-size: var(--fs-small); line-height: 1.7; color: var(--i-ink2); }
.foot ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.foot ul a, .foot .foot-links a { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 8px; margin-left: -8px; border-radius: var(--r-s);
                                  color: var(--i-ink2); font-size: var(--fs-small); text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 3px; }
.foot ul a:hover, .foot .foot-links a:hover { color: var(--i-ink); text-decoration-color: currentColor; }
.foot .fine { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--i-line); color: var(--i-ink3); }
.foot .fine a { color: var(--i-ink2); text-decoration: underline; text-underline-offset: 3px; }   /* inline links in a sentence: WCAG 2.5.8 exempt */
.foot .row { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin-top: 16px; }

/* ---------- 4. COMPONENTS ---------- */
/* buttons: one shape, three tones */
.btn, .btn-ghost, .btn-metal { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: var(--tap); padding: 0 20px;
       border-radius: 11px; font: 700 15px/1.1 var(--sans); letter-spacing: -.005em; cursor: pointer; text-decoration: none; border: 0; white-space: nowrap;
       transition: background-color .15s, border-color .15s, color .15s, filter .15s; }
.btn { background: var(--accent); color: var(--accent-ink); }
.btn:hover { background: var(--accent-strong); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); font-weight: 600; }
.btn-ghost:hover { border-color: var(--ink3); text-decoration: none; }
.btn:disabled, .btn-ghost:disabled { opacity: .55; cursor: default; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px 12px; align-items: center; }

/* chips: static labels (span) and suggestion buttons (button/a) */
.chip { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: var(--fs-kicker); letter-spacing: .06em; text-transform: uppercase;
        padding: 4px 10px; border-radius: var(--r-pill); border: 1px solid var(--line); color: var(--ink3); white-space: nowrap; }
.chip.ok { border-color: var(--ok); color: var(--ok); }
.chip.warn { border-color: var(--amber); color: var(--amber); }
.chip.accent { border-color: var(--accent); color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips > * { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 14px; border-radius: var(--r-pill); border: 1px solid var(--line);
             background: transparent; color: var(--ink2); font: 500 var(--fs-small)/1.2 var(--sans); cursor: pointer; text-decoration: none; text-align: left; }
.chips > *:hover { border-color: var(--accent); color: var(--ink); text-decoration: none; }

/* the ask box */
.ask { display: flex; align-items: center; gap: 8px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
       box-shadow: var(--shadow); padding: 6px 6px 6px 16px; transition: border-color .15s; }
.ask:focus-within { border-color: var(--accent); }
.ask input { flex: 1; min-width: 0; min-height: 44px; border: 0; outline: 0; background: transparent; color: var(--ink); font: 500 16px var(--sans); padding: 0; }
.ask input::placeholder { color: var(--ink3); }
.ask input:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; border-radius: 6px; }
.ask .btn { min-height: 44px; border-radius: 10px; }
@media (max-width: 480px) { .ask { flex-wrap: wrap; padding: 8px; } .ask input { padding-left: 8px; width: 100%; } .ask .btn { width: 100%; } }

/* cards & panels */
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 22px 24px; }
.card .k { font-family: var(--mono); font-size: var(--fs-kicker); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.card h3 { font-size: var(--fs-h3); margin-bottom: 6px; }
.card p { color: var(--ink2); font-size: var(--fs-small); }
.grid { display: grid; gap: 16px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 820px) { .g3, .g2 { grid-template-columns: 1fr; } }

/* stat rail */
.rail { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--paper); }
.rail > div { padding: 18px 20px; border-right: 1px solid var(--line); }
.rail > div:last-child { border-right: 0; }
.rail .k { font-family: var(--mono); font-size: var(--fs-kicker); letter-spacing: .08em; text-transform: uppercase; color: var(--ink3); }
.rail .v { font-family: var(--exp); font-weight: 800; font-size: clamp(22px, 3vw, 32px); letter-spacing: -.02em; margin-top: 6px; color: var(--ink); font-variant-numeric: tabular-nums; }
.rail .v small { font-family: var(--sans); font-size: .45em; font-weight: 600; color: var(--ink2); }
@media (max-width: 720px) { .rail { grid-template-columns: 1fr 1fr; } .rail > div:nth-child(2) { border-right: 0; } .rail > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }

/* bands */
.band { padding: clamp(56px, 8vw, 88px) 0; }
.band--paper { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.band .h2 { margin-top: 12px; }
.band .lede { margin-top: 14px; }

/* steps & principles */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 32px; }
@media (max-width: 720px) { .steps { grid-template-columns: 1fr; } }
.step { border-left: 2px solid var(--accent); background: var(--paper); border-radius: 0 12px 12px 0; padding: 18px 20px; }
.step .n { font-family: var(--mono); font-size: var(--fs-kicker); color: var(--ink3); letter-spacing: .08em; }
.step b { display: block; font-size: 16px; margin: 6px 0 4px; }
.step p { color: var(--ink2); font-size: var(--fs-small); }
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 32px; }
@media (max-width: 720px) { .principles { grid-template-columns: 1fr; } }
.principle { border: 1px solid var(--line); border-radius: var(--r); padding: 20px; background: var(--paper); }
.principle b { display: block; margin-bottom: 4px; font-size: 15.5px; color: var(--ink); }
.principle span { color: var(--ink2); font-size: var(--fs-small); }

/* link wall */
.wall { display: flex; flex-wrap: wrap; gap: 10px; }
.wall a, .wall button { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 14px; font-family: var(--mono); font-size: var(--fs-fine); letter-spacing: .02em;
                        color: var(--ink); border: 1px solid var(--line); background: var(--paper); border-radius: 10px; cursor: pointer; text-decoration: none; }
.wall a:hover, .wall button:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.wall a[aria-current="page"] { border-color: var(--accent); color: var(--accent); }
.wall .more { color: var(--ink3); align-self: center; font-family: var(--mono); font-size: var(--fs-fine); }

/* tables */
.tw { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: var(--paper); }
.tw:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.tw table { width: 100%; font-size: var(--fs-small); }
.tw th { font-family: var(--mono); font-size: var(--fs-kicker); letter-spacing: .05em; text-transform: uppercase; color: var(--ink3); font-weight: 500; text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.tw td { padding: 10px 12px; border-bottom: 1px solid var(--line); color: var(--ink2); }
.tw tr:last-child td { border-bottom: 0; }
.tw th.r, .tw td.r { text-align: right; }
.tw td b { color: var(--ink); }

/* tape (market chart) */
.tape { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 20px 20px 16px; }
.tape-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; margin-bottom: 6px; }
.tape-id { font-family: var(--mono); font-size: var(--fs-kicker); letter-spacing: .06em; text-transform: uppercase; color: var(--ink3); }
.tape-id b { color: var(--accent); font-weight: 600; }
.tape-meta { font-size: var(--fs-small); color: var(--ink2); margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; }
.tape-meta b { color: var(--ink); font-weight: 600; }
.legend { display: flex; gap: 12px 16px; flex-wrap: wrap; align-items: center; font-size: var(--fs-fine); color: var(--ink2); }
.legend > span { display: inline-flex; gap: 7px; align-items: center; }
.legend svg { width: 13px; height: 13px; flex: none; }
svg.tape-svg { width: 100%; height: auto; display: block; margin-top: 6px; }
.tape-svg .ax text { font-family: var(--mono); font-size: 12px; fill: var(--ink3); }
.tape-svg .ax line { stroke: var(--grid); }
.tape-svg .lbl { font-family: var(--mono); font-size: 12px; fill: var(--ink3); letter-spacing: .04em; }
.tape-foot { margin-top: 12px; font-family: var(--mono); font-size: var(--fs-kicker); color: var(--ink3); line-height: 1.6; letter-spacing: .01em; }
.tape-foot a { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 8px; margin: 4px 0 0 -8px; border-radius: var(--r-s); font-size: var(--fs-fine); text-decoration: underline; text-underline-offset: 3px; }
.mk { transform-box: fill-box; transform-origin: center; }
@media (prefers-reduced-motion: no-preference) {
  .mk.pop { animation: kpop .5s cubic-bezier(.2,.7,.3,1) both; animation-delay: calc(var(--i, 0) * 40ms + 80ms); }
  @keyframes kpop { from { opacity: 0; transform: translateY(7px) scale(.6); } to { opacity: 1; transform: none; } }
}

/* forms */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 600; font-size: var(--fs-small); }
.field input { min-height: 48px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); color: var(--ink); font: 500 16px var(--sans); padding: 0 14px; }
.field input:focus { border-color: var(--accent); outline: 3px solid var(--ring); outline-offset: 2px; }
.field .hint { font-size: var(--fs-fine); color: var(--ink3); }
.alert { border: 1px solid var(--amber); background: color-mix(in srgb, var(--amber) 10%, transparent); color: var(--ink); border-radius: 12px; padding: 12px 15px; font-size: var(--fs-small); }
.alert.ok { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 10%, transparent); }

/* result card (the public taste) */
.result { margin-top: 22px; max-width: 760px; }
.result-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-l); padding: 22px 24px 18px; box-shadow: var(--shadow); }
.result-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.result-head h2 { font-family: var(--exp); font-weight: 800; font-size: clamp(20px, 2.6vw, 26px); letter-spacing: -.025em; flex: 1 1 auto; }
.result-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; margin-top: 18px; }
@media (max-width: 720px) { .result-grid { grid-template-columns: 1fr; } }
.result-col { border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; background: var(--ground); }
.result-col .display { margin-top: 8px; font-size: clamp(28px, 4vw, 40px); }
.result-col .meta { margin-top: 8px; font-size: var(--fs-small); color: var(--ink2); display: flex; flex-wrap: wrap; gap: 4px 12px; }
.result-col .meta b { color: var(--ink); }
.result-col ul { margin: 12px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; font-size: var(--fs-small); color: var(--ink2); }
.result-col ul li::before { content: "— "; color: var(--accent); }
.result-col .btn-row { margin-top: 16px; }
.result-verdict { margin-top: 14px; font-size: 17px; font-weight: 600; }
.result-verdict span { color: var(--ink2); font-weight: 500; }
.result-foot { margin-top: 14px; }
.result-loading { display: inline-flex; align-items: center; gap: 12px; color: var(--ink2); font-size: var(--fs-small); padding: 8px 0; }
.result .tw { margin-top: 12px; }
.result .tw td, .result .tw th { padding: 7px 10px; font-size: var(--fs-fine); }

/* ---------- 5. libraries.dev EFFECT PORTS ----------
   The libraries.dev packages (border-beam, metal-fx, thinking-orbs) are React components; this site has no
   React, so the three effects we use are ported here as CSS driven by custom properties. Tune them in
   libraries.dev Studio, then paste the values into the variables below (docs/DESIGN_SYSTEM.md → "Studio").
   Beam  <BorderBeam size color duration>   → --beam-w --beam-color --beam-hi --beam-speed
   Metal <MetalFx preset="silver">           → --metal-hi --metal-mid --metal-lo --metal-ink
   Orb   <ThinkingOrb state size>            → --orb-size --orb-a --orb-b                      */
@property --beam { syntax: '<angle>'; inherits: false; initial-value: 0deg; }
.fx-beam { --beam-w: 1.4px; --beam-color: var(--accent); --beam-hi: #dfe6f5; --beam-speed: 5.5s; position: relative; border-radius: var(--r-l); }
.fx-beam::before { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: var(--beam-w); pointer-events: none;
  background: conic-gradient(from var(--beam), transparent 0 60%, color-mix(in srgb, var(--beam-color) 55%, transparent) 70%, var(--beam-color) 82%, var(--beam-hi) 90%, transparent 97%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; }
@media (prefers-reduced-motion: no-preference) { .fx-beam::before { animation: beam var(--beam-speed) linear infinite; } @keyframes beam { to { --beam: 360deg; } } }
@media (prefers-reduced-motion: reduce) { .fx-beam::before { background: linear-gradient(var(--beam-color), var(--beam-color)); opacity: .55; } }

.btn-metal { --metal-hi: #f6f9fe; --metal-mid: #c6cfdd; --metal-lo: #9ba7bd; --metal-ink: #0b0e14; position: relative; overflow: hidden; color: var(--metal-ink); font-family: var(--exp); font-weight: 800;
  background: linear-gradient(180deg, var(--metal-hi), var(--metal-mid) 46%, var(--metal-lo) 55%, #eaeff7); box-shadow: 0 1px 0 #ffffffaa inset, 0 -9px 16px #00000055 inset, 0 12px 26px #00000070; }
.btn-metal:hover { filter: brightness(1.04); text-decoration: none; }
.btn-metal > * { position: relative; z-index: 1; }
.btn-metal::after { content: ""; position: absolute; inset: 0; background: linear-gradient(105deg, transparent 32%, #ffffffcc 46%, transparent 60%); transform: translateX(-130%); }
@media (prefers-reduced-motion: no-preference) { .btn-metal::after { animation: sheen 5s ease-in-out infinite; } @keyframes sheen { 0%, 55% { transform: translateX(-130%); } 78%, 100% { transform: translateX(130%); } } }
.surface-dark .btn-metal:focus-visible, .foot .btn-metal:focus-visible { outline-color: #fff; }

.fx-orb { --orb-size: 14px; --orb-a: #c3d4ff; --orb-b: #3f5bd0; width: var(--orb-size); height: var(--orb-size); border-radius: 50%; position: relative; flex: none; display: inline-block;
  background: radial-gradient(circle at 35% 30%, var(--orb-a), var(--orb-b) 58%, #1c2b64); }
.fx-orb::after { content: ""; position: absolute; inset: -3px; border-radius: 50%; background: conic-gradient(from 0deg, transparent, var(--accent), transparent); opacity: .7; }
@media (prefers-reduced-motion: no-preference) { .fx-orb::after { animation: orbspin 1.6s linear infinite; } @keyframes orbspin { to { transform: rotate(360deg); } } }

/* locked members preview */
.lock { position: relative; overflow: hidden; border-radius: var(--r); }
.lock-veil { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; text-align: center; padding: 24px;
  background: radial-gradient(120% 90% at 50% 40%, color-mix(in srgb, var(--paper) 75%, transparent), color-mix(in srgb, var(--ground) 93%, transparent)); backdrop-filter: blur(4px); }
.lock-veil .t { font-family: var(--exp); font-weight: 800; font-size: 18px; color: var(--ink); }

/* ---------- 6. UTILITIES ---------- */
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; } .mt-5 { margin-top: 48px; }
.row { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; }
.between { justify-content: space-between; }
.muted { color: var(--ink3); }
.hide-mobile { } @media (max-width: 720px) { .hide-mobile { display: none !important; } }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: var(--tap); min-width: var(--tap); padding: 0 12px; border-radius: var(--r-s);
            border: 1px solid var(--line); background: transparent; color: var(--ink2); font: 500 var(--fs-fine) var(--mono); cursor: pointer; }
.icon-btn:hover { color: var(--ink); border-color: var(--ink3); }
.icon-btn[aria-pressed="true"] { color: var(--ink); border-color: var(--accent); }
.foot .icon-btn { color: var(--i-ink2); border-color: var(--i-line); }
.foot .icon-btn:hover, .foot .icon-btn[aria-pressed="true"] { color: var(--i-ink); }