*,
*::before,
*::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
:root { color-scheme: light dark; }
:root{
  --bg:#fff7b8; --fg:#111; --card:#fff; --muted:#666;
  --radius:14px; --shadow:0 6px 18px rgba(0,0,0,.08);
  --ok:#22c55e; --bad:#ef4444; --hint:#ffb703; --blue:#2563eb;
}
:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; } }
@view-transition { navigation: auto; }
::view-transition-group(root) { animation-duration: 250ms; }

body{background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.5}
.container{max-width:min(1100px,95vw);margin:0 auto;padding:clamp(14px,2vw,20px); container-type: inline-size;}
a{color:inherit;text-decoration:none}

header.site{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand h1{margin:0;font-size:clamp(18px,2.2vw,22px)}
nav.actions{display:flex;gap:8px;flex-wrap:wrap}
.btn,button{appearance:none;border:1px solid #ddd;background:#fff;border-radius:10px;padding:8px 12px;cursor:pointer;box-shadow:var(--shadow);font-weight:600}
.btn:hover,button:hover{transform:translateY(-1px)}

/* Home grid smaller + responsive */
.grid-home{display:grid;gap:12px;grid-template-columns:repeat(auto-fit, minmax(140px, 1fr))}
.card{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid #eaeaea;border-radius:var(--radius);box-shadow:var(--shadow);padding:14px; min-height:48px}
.card .emoji{font-size:20px}

.site-intro{background:var(--card);border:1px solid #eaeaea;border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin:14px 0}

footer.site{margin-top:28px;color:var(--muted);font-size:14px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* Modal */
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.35);z-index:1000}
.modal[hidden]{display:none}
.modal .panel{background:#fff;border-radius:12px;box-shadow:var(--shadow);max-width:min(900px,92vw);max-height:85vh;overflow:auto;padding:16px;border:1px solid #eaeaea}
.modal .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.legend-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:10px}
.legend-cell{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px;border:1px solid #eee;border-radius:8px}

/* ASL glyphs */
.asl{font-family:'ASL Hand', serif; font-size:28px}
.asl.big{font-size: clamp(28px, 9vw, 60px); display:inline-block; padding:8px 16px; border:1px dashed #ddd; border-radius:12px; background:#fff}
.en{font-size:12px;color:#777}

/* Menu */
.more-games{position:relative;display:inline-block}
.more-games .menu{position:absolute;min-width:220px;background:#fff;border:1px solid #ddd;border-radius:10px;box-shadow:var(--shadow);padding:6px;margin-top:6px;z-index:999}
.more-games .menu[hidden]{display:none}
.more-games [role="menuitem"]{display:block;padding:8px 10px;border-radius:8px}
.more-games [role="menuitem"]:hover, .more-games [role="menuitem"]:focus{background:#f6f6f6;outline:none}

/* Hide header actions on mobile; show bottom actions */
body.homepage header.site .actions { display:none; }
body.gamepage header.site .actions { display:none; }
.bottom-actions { display:flex; flex-wrap:wrap; gap:8px; margin:12px 0 18px; }
.bottom-actions .zoom-tip { flex-basis:100%; color:#666; font-size:13px; margin-top:4px; }
@media (min-width: 900px) {
  body.homepage header.site .actions { display:flex; }
  body.gamepage header.site .actions { display:flex; }
  .bottom-actions.home-only { display:none; }
}

/* Game common */
.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px}
.status{margin:8px 0;color:#333}

/* Matching */
.mg-grid{display:grid;grid-template-columns:repeat(4, minmax(64px,1fr));gap:10px;margin:12px 0}
.mg-card{background:#fff;border-radius:12px;height:86px;position:relative;cursor:pointer;user-select:none;border:1px solid #ddd;perspective:700px}
.mg-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .3s ease}
.mg-card.revealed .mg-inner, .mg-card.matched .mg-inner{transform:rotateY(180deg)}
.mg-front, .mg-back{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;backface-visibility:hidden;border-radius:12px}
.mg-front{background:#fff;border:1px dashed #ddd}
.mg-back{transform:rotateY(180deg);background:#fff;border:1px solid #ddd;gap:6px;flex-direction:column}
.mg-back .en{font-size:14px;color:#333}
.mg-card.matched .mg-back { background:#eaffea; border-color:#22c55e; }

/* Letter quiz with inline hint */
.lq-wrap{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:center;margin:16px 0}
.lq-hint-btn{margin-left:8px}
.lq-wrap input{font-size:20px;padding:10px;border:1px solid #ddd;border-radius:10px}

/* Sentence */
.sg-wrap{display:flex;flex-direction:column;gap:12px;align-items:flex-start;margin:16px 0}

/* Simon */
.sim-wrap{display:flex;flex-direction:column;gap:10px;align-items:flex-start;margin:14px 0}
.sim-controls-inline{margin:6px 0}

/* Word Search */
.ws-words-top { background:#fff; border:1px solid #eaeaea; border-radius:12px; box-shadow:var(--shadow); padding:10px; margin:8px 0; }
.ws-words-top h3 { margin:0 0 6px 0; }
.ws-wrap{display:grid;grid-template-columns:1fr 220px;gap:12px;margin:8px 0}
.ws-grid{display:grid;grid-template-columns:repeat(7, 40px);gap:6px}
.ws-cell{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #ddd;border-radius:8px;cursor:pointer;user-select:none;position:relative}
.ws-cell.selected{background:#eef}
.ws-cell.found{background:#eaffea;border-color:#22c55e}
.ws-side{background:#fff;border:1px solid #eaeaea;border-radius:12px;box-shadow:var(--shadow);padding:10px}
#ws-words li.done, #ws-words-top li.done {color:#22c55e;text-decoration:line-through;background:#eaffea;border-radius:6px;padding:2px 6px}
@media (max-width: 799px){
  .ws-wrap{grid-template-columns:1fr; gap:10px;}
  .ws-side{display:none}
}

/* Dark mode */
body.dark .asl { color: var(--blue); }
body.dark .navlink { color: var(--blue); }
body.dark #ws-words li, body.dark .ws-words-top { color: var(--blue); }
body.dark { background:#0b0f19; color:#eaeef5; }
body.dark .card, body.dark .site-intro, body.dark .ws-side, body.dark .mg-card { background:#0f1525; border-color:#223; }
body.dark .btn { background:#0f1525; border-color:#334; color: inherit; }

.asl.ok { color: #22c55e !important; }
.asl.bad { color: #ef4444 !important; }
.hint-en{position:absolute;bottom:4px;right:6px;font-size:12px;color:#333;background:#fff;padding:2px 6px;border:1px solid #ddd;border-radius:8px}