/* Shared by /chinese/words/ and /chinese/test/: tokens, top nav, controls, character buttons, bottom sheet */
:root{
  --bg:#f6f7f4; --surface:#ffffff; --ink:#1d2321; --muted:#66706b; --line:#dfe3dd;
  --accent:#b8322a; --accent-soft:#f6e4e1; --note:#7a5c12; --note-bg:#fbf3dc;
  --f-han:"Noto Serif SC","Songti SC","SimSun",serif;
  --f-body:"Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --tap:44px;
  --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){:root{
  --bg:#151917; --surface:#1d2220; --ink:#e7ebe8; --muted:#9aa49f; --line:#2f3633;
  --accent:#ec6a5f; --accent-soft:#3a2321; --note:#e3c37a; --note-bg:#33291a; color-scheme:dark}}
*{box-sizing:border-box}
/* Author display rules (e.g. .sheet{display:flex}) beat the browser's [hidden] rule; make hidden always win */
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.45;-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Top nav: brand + Words | Test tabs */
.topnav{display:flex;align-items:center;gap:12px;min-height:var(--tap)}
.brand{font-family:var(--f-han);font-weight:700;font-size:1.25rem;color:var(--ink);text-decoration:none;margin-right:auto}
.tabs{display:flex;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:3px}
.tabs a{min-width:72px;text-align:center;padding:6px 14px;border-radius:999px;color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem}
.tabs a[aria-current="page"]{background:var(--accent);color:#fff}

/* Controls: 16px text so iOS doesn't zoom on focus */
.field{font:inherit;font-size:16px;height:40px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);min-width:0}
select.field{appearance:none;padding-right:32px;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 17px) 17px,calc(100% - 12px) 17px;background-size:5px 5px;background-repeat:no-repeat;text-overflow:ellipsis}
.toggle{flex:none;height:40px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--muted);font-size:.9rem;font-weight:600;cursor:pointer}
.toggle[aria-pressed="true"]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}
.count{font-family:var(--f-mono);font-size:.8rem;color:var(--muted);white-space:nowrap}

/* Characters are buttons: tap one to open its sheet */
.ch{background:none;border:0;padding:0 1px;margin:0;cursor:pointer;border-radius:4px;line-height:inherit;font:inherit}
.ch.linked{text-decoration:underline dotted var(--muted);text-decoration-thickness:1px;text-underline-offset:5px}
.ch.on,.ch:hover{background:var(--accent-soft);color:var(--accent)}
.han{font-family:var(--f-han);font-weight:500}
.py{color:var(--accent);font-weight:600}
.tag{font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:0 6px;white-space:nowrap;vertical-align:middle}
.note{font-size:.85rem;color:var(--note);background:var(--note-bg);border-radius:6px;padding:4px 8px}

/* Veiled text: a grey bar until revealed */
.veil:not(.show){color:transparent !important;background:var(--line);border-radius:4px;user-select:none}

/* Character sheet: bottom sheet on phones, side panel on wide screens */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:20}
.sheet{position:fixed;z-index:21;left:0;right:0;bottom:0;max-height:82dvh;display:flex;flex-direction:column;background:var(--surface);
  border-radius:18px 18px 0 0;box-shadow:0 -8px 28px rgba(0,0,0,.18);overscroll-behavior:contain}
.sheet-grab{flex:none;height:22px;display:grid;place-items:center;cursor:grab;touch-action:none}
.sheet-grab::before{content:"";width:40px;height:5px;border-radius:3px;background:var(--line)}
.sheet-body{overflow-y:auto;padding:0 20px calc(20px + var(--safe-b));-webkit-overflow-scrolling:touch}
.s-top{display:flex;gap:16px;align-items:flex-start}
.s-han{font-family:var(--f-han);font-size:3.4rem;line-height:1;font-weight:700;flex:none}
.s-meta{min-width:0;flex:1;padding-top:4px}
.s-py{display:inline-block;font-size:1.15rem;cursor:pointer;min-width:4ch}
.s-gloss{margin-top:4px}
.s-close{flex:none;width:var(--tap);height:var(--tap);border-radius:10px;border:1px solid var(--line);background:var(--bg);font-size:1.4rem;line-height:1;cursor:pointer}
.s-h{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:22px 0 8px}
.s-list{display:grid;gap:2px}
.s-w{display:grid;grid-template-columns:auto minmax(0,1fr);gap:0 12px;align-items:baseline;min-height:var(--tap);padding:8px 10px;border-radius:10px;text-align:left;background:none;border:0;cursor:pointer;width:100%}
.s-w:active,.s-w:hover{background:var(--bg)}
.s-w .han{font-size:1.25rem;grid-row:span 2}
.s-w .han b{color:var(--accent);font-weight:700}
.s-w .py{font-size:.9rem;justify-self:start}
.s-w .en{font-size:.9rem;color:var(--muted)}
.s-same{display:flex;flex-wrap:wrap;gap:6px}
.s-same button{display:flex;gap:6px;align-items:baseline;min-height:var(--tap);padding:6px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);cursor:pointer}
.s-same .h{font-family:var(--f-han);font-size:1.15rem}
.s-same .g{font-size:.82rem;color:var(--muted)}
.s-hint{font-size:.85rem;color:var(--muted);margin:8px 0 0}
@media (min-width:720px){
  .sheet{left:auto;top:0;width:400px;max-height:none;border-radius:0;box-shadow:-8px 0 24px rgba(0,0,0,.12)}
  .sheet-grab{display:none}
  .sheet-body{padding-top:calc(20px + var(--safe-t))}
  .s-han{font-size:4rem}
}
@media (prefers-reduced-motion:no-preference){
  .sheet{transition:transform .2s ease}
  .sheet.dragging{transition:none}
  .toggle,.tabs a{transition:background .15s,color .15s}
}