/* =====================================================================
   portal.css — Palette design kit, extracted 2026-09-23 from
   ~/Desktop/PALETTE-MODELS/index.html ("Palette Models", Edge0-style).
   Tokens, nav, hero, section, rows, cards, buttons, table, chips are
   copied verbatim. Code block + form controls are NOT in the source page;
   they are derived from the same rules (1px --line border, 0 radius,
   transparent fill, 2px --ink focus ring, 150 ms colour transitions).

   CLASS INDEX
   layout     .wrap            page gutter, clamp(8px,4vw,88px)
              section          full-bleed band, hairline bottom, 100vh snap
              section.flow     opt-out: auto height, no snap (docs/tables)
              .sechead         h2 + .sub / button row above a section body
              .eyebrow         12px uppercase tracked label
              .sub .note       secondary copy (62ch) / footnote (13px)
   nav        header.top .nav  sticky 64px bar, blur, hairline bottom
              .brand           logo (22px) + "|" + wordmark
              .nav ul          14px links, hidden < 900px
              .ctrls           right-aligned group (lang, theme, cta)
              .lang            KO/EN/JA segmented buttons, aria-pressed
              .theme           34x32 sun/moon toggle, #themebtn
   hero       .hero .herogrid .herocopy .lede .herobtns .proof .scrollhint
   button     .btn             white rectangle, » glyph in .gl
              .btn.ghost       outline variant, inverts on hover
   rows       .rows > .row     hairline rows (icon 40px | text)
              .row.plain       hairline row without the icon column
              .bigstat         big number + label, hairline
              .rules li        numbered/bulleted hairline list
   cards      .cards > .card   1px-gap outline grid, .st status badge,
              .name .base .num
              .ladder          4-col outline tier grid
   table      .tblwrap table   scroll wrapper, uppercase th, tabular td.n
              tr.ours          bold first cell
   code       pre.code code    outlined mono block; code inline
   form       .field label input select textarea .check
   chips      .chip .chip.dim  square-dot pill; .stat .stat.pub badge
              .tabs            segmented tabs, aria-selected
   footer     footer .fgrid .fbot
   motion     .rv .rv.in .rv.d1-.d5   reveal-on-view (IntersectionObserver)
              html.pre         pre-intro hidden state (hero + nav)
   ===================================================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Noto+Sans+KR:wght@400;500;700&family=Noto+Sans+JP:wght@400;500;700&display=swap");

/* ---------- tokens ---------- */
:root{
  --bg:#050505; --panel:#0a0a0a; --panel2:#101010; --line:#262626; --line2:#1a1a1a;
  --ink:#ffffff; --ink2:rgba(255,255,255,.72); --ink3:rgba(255,255,255,.48);
  --bar:#3d3d3d; --bar-ours:#ffffff; --bar-ours2:#c9c9c9; --accent:#ffffff;
  --good:#8ee6a1; --warn:#f2c94c;
  --sans:"Inter","Noto Sans KR","Noto Sans JP",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --nav-h:64px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-ui:cubic-bezier(.4,0,.2,1);
}
*{box-sizing:border-box}
html{color-scheme:dark;scroll-snap-type:y proximity;scroll-padding-top:64px}

/* ---------- light theme ---------- */
html[data-theme="light"]{color-scheme:light;--bg:#f4f4f2;--panel:#ffffff;--panel2:#f8f8f6;--line:#d9d9d5;--line2:#e6e6e2;--ink:#0a0a0a;--ink2:rgba(10,10,10,.72);--ink3:rgba(10,10,10,.5);--bar:#c9c9c4;--bar-ours:#0a0a0a;--bar-ours2:#3a3a3a;--accent:#0a0a0a}
html[data-theme="light"] .brand img{filter:invert(1)}
html[data-theme="light"] .theme .moon{display:inline}
html[data-theme="light"] .theme .sun{display:none}

/* ---------- base ---------- */
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;padding-inline:16px}
a{color:inherit}
.wrap{max-width:none;margin:0 auto;padding-inline:clamp(8px,4vw,88px)}
html[lang="ko"] h1,html[lang="ko"] h2,html[lang="ko"] p,html[lang="ko"] li,html[lang="ja"] h1,html[lang="ja"] h2,html[lang="ja"] p,html[lang="ja"] li{word-break:keep-all;overflow-wrap:anywhere}
html[lang="ko"] h1,html[lang="ja"] h1{max-width:17ch;letter-spacing:-.01em}

/* ---------- type ---------- */
h1{font-size:clamp(40px,5.6vw,72px);line-height:1.08;font-weight:700;letter-spacing:-.03em;margin:0 0 22px;max-width:13ch;text-wrap:balance}
h2{font-size:clamp(30px,4.2vw,50px);line-height:1.12;font-weight:700;letter-spacing:-.025em;margin:0 0 14px;text-wrap:balance;max-width:20ch}
h3{font-size:20px;font-weight:600;margin:0 0 6px;letter-spacing:-.01em}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink3);font-weight:600;margin-bottom:18px}
.lede{font-size:clamp(17px,1.5vw,21px);color:var(--ink2);max-width:46ch;margin:0 0 28px}
.lede b{color:var(--ink);font-weight:600}
.lede .dot{color:var(--ink3);padding:0 8px}
.sub{color:var(--ink2);max-width:62ch;margin:0}
.note{color:var(--ink3);font-size:13px;margin-top:22px;max-width:70ch}
.sechead{display:flex;justify-content:space-between;align-items:flex-start;gap:32px;flex-wrap:wrap;margin-bottom:44px}

/* ---------- nav ---------- */
header.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line2);margin-inline:-16px;padding-inline:16px}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;font-size:14px;color:var(--ink3);letter-spacing:.02em}
.brand img{height:22px;width:auto;display:block}
.brand span{padding-left:10px;border-left:1px solid var(--line)}
.nav ul{display:flex;gap:22px;list-style:none;margin:0 0 0 12px;padding:0;font-size:14px;color:var(--ink2)}
.nav ul a{text-decoration:none}
.nav ul a:hover,.nav ul a[aria-current="page"]{color:var(--ink)}
.nav .ctrls{margin-left:auto;display:flex;align-items:center;gap:10px}
.lang{display:inline-flex;border:1px solid var(--line)}
.lang button{background:transparent;color:var(--ink3);border:0;border-right:1px solid var(--line);font:inherit;font-size:12px;font-weight:600;padding:7px 10px;cursor:pointer;letter-spacing:.06em}
.lang button:last-child{border-right:0}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.theme{background:transparent;color:var(--ink);border:1px solid var(--line);font-size:14px;width:34px;height:32px;cursor:pointer;display:inline-grid;place-items:center}
.theme .moon{display:none}

/* ---------- button ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:var(--bg);text-decoration:none;font-weight:600;font-size:14px;padding:10px 16px 10px 10px;border:1px solid var(--ink);font-family:inherit;cursor:pointer;line-height:1.55}
.btn .gl{display:inline-grid;place-items:center;width:26px;height:26px;background:var(--bg);color:var(--ink);font-size:14px;font-weight:700}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost .gl{background:var(--ink);color:var(--bg)}
.btn:hover{opacity:.88}
.btn.ghost:hover{background:var(--ink);color:var(--bg);opacity:1}
.btn.ghost:hover .gl{background:var(--bg);color:var(--ink)}
.btn:focus-visible,.tabs button:focus-visible,.lang button:focus-visible,.theme:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}
.btn[disabled],.btn[aria-disabled="true"]{opacity:.4;pointer-events:none}

/* ---------- section ---------- */
section{min-height:calc(100vh - 64px);display:flex;align-items:center;padding-block:96px;border-bottom:1px solid var(--line2);margin-inline:-16px;padding-inline:16px;scroll-snap-align:start;background:var(--bg)}
section>.wrap{width:100%}
section:nth-of-type(even){background:var(--panel)}
section.flow{min-height:0;scroll-snap-align:none;display:block}

/* ---------- hero ---------- */
.hero{position:relative;min-height:calc(100vh - 64px);padding-block:80px;overflow:hidden;margin-inline:-16px;padding-inline:16px;display:flex;align-items:center}
.hero canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero .veil{position:absolute;inset:0;pointer-events:none;background:radial-gradient(90% 80% at 22% 50%,color-mix(in srgb,var(--bg) 60%,transparent) 0%,color-mix(in srgb,var(--bg) 20%,transparent) 45%,transparent 75%),linear-gradient(to bottom,color-mix(in srgb,var(--bg) 25%,transparent),transparent 25%,transparent 75%,var(--bg))}
.hero .wrap{position:relative}
.herogrid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.herocopy .eyebrow{margin-bottom:22px}
.herobtns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.proof{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;font-size:12.5px;color:var(--ink3);letter-spacing:.04em}
.proof b{color:var(--ink2);font-weight:600;letter-spacing:0}
.heroart{position:relative;min-height:420px}
.heroart svg{width:100%;height:auto;display:block;overflow:visible}
.hero .scrollhint{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);color:var(--ink3);font-size:12px;letter-spacing:.14em;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:8px}
.hero .scrollhint i{width:1px;height:34px;background:linear-gradient(var(--ink),transparent);display:block;animation:drop 1.8s ease-in-out infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- hairline rows ---------- */
.rows{display:flex;flex-direction:column}
.row{display:grid;grid-template-columns:40px 1fr;gap:14px;padding:28px 0;border-top:1px solid var(--line)}
.row:last-child{border-bottom:1px solid var(--line)}
.row.plain{grid-template-columns:1fr}
.row svg{width:28px;height:28px;stroke:var(--ink2);fill:none;stroke-width:1.4}
.row p{margin:6px 0 0;color:var(--ink2);font-size:15px;max-width:52ch}
.bigstat{display:flex;flex-direction:column;gap:6px;padding:28px 0;border-top:1px solid var(--line)}
.bigstat:last-child{border-bottom:1px solid var(--line)}
.bigstat .n{font-size:clamp(40px,5vw,64px);font-weight:700;letter-spacing:-.03em;line-height:1;font-variant-numeric:tabular-nums}
.bigstat .l{color:var(--ink2);font-size:15px}
.rules{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.rules li{padding:16px 0;border-top:1px solid var(--line);color:var(--ink2);font-size:15px;display:grid;grid-template-columns:28px 1fr;gap:10px}
.rules li:last-child{border-bottom:1px solid var(--line)}
.rules li b{color:var(--ink);font-weight:600}
.split{display:grid;grid-template-columns:1fr 1fr;gap:96px;align-items:start}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.card{background:var(--panel2);padding:26px 24px 22px;display:flex;flex-direction:column;gap:12px;text-decoration:none;min-height:250px;position:relative;color:inherit}
.card:hover{background:var(--panel2);transform:translateY(-3px)}
.card canvas{width:100%;height:96px;display:block}
.card .st{position:absolute;top:18px;right:18px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;padding:4px 8px;border:1px solid var(--line);color:var(--ink2)}
.card .st.pub{border-color:var(--ink);color:var(--ink)}
.card .name{font-weight:700;font-size:20px;letter-spacing:-.01em}
.card .base{color:var(--ink3);font-size:13px}
.card .num{font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1;font-variant-numeric:tabular-nums;margin-top:auto}
.card .num small{font-size:13px;font-weight:500;color:var(--ink2);letter-spacing:0;margin-left:8px}
.card p{margin:0;color:var(--ink2);font-size:14px}
.ladder{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);margin-top:28px}
.ladder>div{padding:26px 22px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:12px;min-height:260px}
.ladder>div:last-child{border-right:0}
.ladder .t{font-weight:600}
.ladder .r{color:var(--ink3);font-size:13px}
.ladder .m{margin-top:auto;display:flex;flex-direction:column;gap:8px}

/* ---------- chips / badges / tabs ---------- */
.chip{display:inline-flex;align-items:center;gap:8px;font-size:13px;padding:6px 10px;border:1px solid var(--line);color:var(--ink2);width:fit-content}
.chip i{width:8px;height:8px;background:var(--ink);display:inline-block}
.chip.dim i{background:var(--bar)}
.chip.good i{background:var(--good)}
.chip.warn i{background:var(--warn)}
.stat{display:inline-block;padding:3px 8px;border:1px solid var(--line);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink2);white-space:nowrap}
.stat.pub{border-color:var(--ink);color:var(--ink)}
.tabs{display:inline-flex;border:1px solid var(--line);margin-bottom:34px}
.tabs button{background:transparent;color:var(--ink2);border:0;padding:12px 22px;font:inherit;font-weight:600;font-size:14px;cursor:pointer;border-right:1px solid var(--line)}
.tabs button:last-child{border-right:0}
.tabs button[aria-selected="true"]{background:var(--ink);color:var(--bg)}
.legend{display:flex;gap:18px;font-size:12.5px;color:var(--ink2);margin-top:6px}
.legend i{width:10px;height:10px;display:inline-block;margin-right:6px;vertical-align:-1px}
.tip{position:fixed;pointer-events:none;background:var(--ink);color:var(--bg);font-size:12.5px;padding:6px 9px;border:1px solid #fff;transform:translate(-50%,calc(-100% - 10px));white-space:nowrap;opacity:0;transition:opacity .12s;z-index:30;font-variant-numeric:tabular-nums}
.tip.on{opacity:1}

/* ---------- table ---------- */
.tblwrap{overflow-x:auto;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:900px;font-size:14px}
.tblwrap.fit table{min-width:0}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line2);vertical-align:top}
th{color:var(--ink3);font-weight:600;font-size:12px;letter-spacing:.1em;text-transform:uppercase;background:var(--panel)}
td.n{font-variant-numeric:tabular-nums;white-space:nowrap}
td a{color:var(--ink)}
tr.ours td:first-child{font-weight:700}
tbody tr:last-child td{border-bottom:0}

/* ---------- code (derived) ---------- */
code{font-family:var(--mono);font-size:.9em;padding:1px 5px;border:1px solid var(--line);background:var(--panel2);color:var(--ink);font-variant-ligatures:none}
pre.code{margin:0;border:1px solid var(--line);background:var(--panel);color:var(--ink);font-family:var(--mono);font-size:13.5px;line-height:1.6;padding:18px 20px;overflow-x:auto;tab-size:2}
pre.code code{padding:0;border:0;background:transparent;font-size:inherit}
pre.code .c{color:var(--ink3)}
pre.code .k{color:var(--ink);font-weight:600}
pre.code .s{color:var(--bar-ours2)}
.codehead{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:8px 12px 8px 20px;border:1px solid var(--line);border-bottom:0;background:var(--panel2);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink3)}
.codehead+pre.code{border-top:0}
.codehead button{background:transparent;color:var(--ink2);border:1px solid var(--line);font:inherit;font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:4px 8px;cursor:pointer}
.codehead button:hover{background:var(--ink);color:var(--bg)}

/* ---------- form (derived) ---------- */
.field{display:flex;flex-direction:column;gap:8px;min-width:0}
.field label,label.lbl{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink3);font-weight:600}
input,select,textarea{font:inherit;font-size:14px;color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:0;padding:10px 12px;width:100%;min-width:0;line-height:1.55;-webkit-appearance:none;appearance:none}
input::placeholder,textarea::placeholder{color:var(--ink3)}
input:hover,select:hover,textarea:hover{border-color:var(--ink3)}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--ink);outline-offset:-2px;border-color:var(--ink)}
input[disabled],select[disabled],textarea[disabled]{opacity:.4}
textarea{min-height:140px;resize:vertical;font-family:var(--mono);font-size:13.5px}
select{background-image:linear-gradient(45deg,transparent 50%,var(--ink2) 50%),linear-gradient(135deg,var(--ink2) 50%,transparent 50%);background-position:calc(100% - 17px) 50%,calc(100% - 12px) 50%;background-size:5px 5px;background-repeat:no-repeat;padding-right:34px}
input[type="range"]{padding:0;border:0;height:22px;background:transparent;accent-color:var(--ink)}
.check{display:inline-flex;align-items:center;gap:10px;font-size:14px;color:var(--ink2);cursor:pointer}
.check input{width:16px;height:16px;padding:0;margin:0;display:inline-grid;place-items:center;cursor:pointer}
.check input:checked{background:var(--ink)}
.check input:checked::after{content:"";width:6px;height:6px;background:var(--bg);display:block}
.fieldrow{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px 24px}
.help{font-size:12.5px;color:var(--ink3);margin:0}
.err{font-size:12.5px;color:var(--warn);margin:0}

/* ---------- footer ---------- */
footer{padding-block:56px 40px;color:var(--ink3);font-size:13px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px}
.fgrid h4{color:var(--ink);font-size:13px;margin:0 0 12px;letter-spacing:.1em;text-transform:uppercase}
.fgrid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.fgrid a{color:var(--ink2);text-decoration:none}
.fgrid a:hover{color:var(--ink)}
.fbot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid var(--line2);padding-top:22px}

/* ---------- motion: reveal on view, 150 ms colour hovers, pre-intro ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
.rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}.rv.d4{transition-delay:.32s}.rv.d5{transition-delay:.4s}
a,button,.card,.chip,.paper,input,select,textarea{transition:color .15s var(--ease-ui),background-color .15s var(--ease-ui),border-color .15s var(--ease-ui),transform .3s var(--ease)}
html.pre .hero h1{clip-path:inset(100% 0 -14% 0)}
html.pre .hero .lede,html.pre .hero .herobtns,html.pre .hero .proof,html.pre .hero .heroart,html.pre .nav .brand,html.pre .nav ul,html.pre .nav .cta,html.pre .scrollhint{opacity:0}

/* ---------- breakpoints ---------- */
@media (max-width:1000px){.herogrid{grid-template-columns:1fr}.heroart{min-height:0;margin-top:10px}}
@media (max-width:900px){
  section,.hero{min-height:0}
  html{scroll-snap-type:none}
  .split{grid-template-columns:1fr}
  .ladder{grid-template-columns:1fr 1fr}
  .ladder>div:nth-child(2){border-right:0}
  .ladder>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .cards{grid-template-columns:1fr 1fr}
  .fgrid{grid-template-columns:1fr 1fr}
  .nav ul{display:none}
  section{padding-block:64px}
}
@media (max-width:560px){
  .cards,.ladder,.fgrid{grid-template-columns:1fr}
  .ladder>div{border-right:0;border-bottom:1px solid var(--line)}
  .nav{gap:14px}
  .btn.cta span:last-child{display:none}
  .btn.cta{padding-right:10px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-snap-type:none}
  .hero .scrollhint i{animation:none}
  html.pre .hero h1{clip-path:none}
  .rv,.hero .lede,.hero .herobtns,.hero .proof,.hero .heroart,html.pre .nav .brand,html.pre .nav ul,html.pre .nav .cta,html.pre .scrollhint{opacity:1;transform:none;animation:none}
}

/* Page-wide overflow guard: the hero diagrams (SVG) ran past the viewport at ~400 px and
   produced a horizontal scrollbar on /api. Wide things scroll inside their own box; the body
   never does. */
html,body{overflow-x:hidden;max-width:100%}
svg,img,video{max-width:100%;height:auto}
pre,table{max-width:100%}