:root{--bg: #f6f3ee;--surface: #ffffff;--ink: #1d1b19;--ink-soft: #6b655e;--line: #e7e1d8;--accent: #0f766e;--accent-soft: #e2f1ee;--forgot: #b4472f;--forgot-soft: #f8e7e1;--shadow: 0 1px 2px rgba(29, 27, 25, .06), 0 12px 32px rgba(29, 27, 25, .08);--radius: 20px;--pos-noun: #1f5fa8;--pos-noun-bg: #e3eefa;--pos-verb: #6b3fa0;--pos-verb-bg: #efe7f8;--pos-adj: #9a4410;--pos-adj-bg: #fbeadf;--pos-adv: #8a6514;--pos-adv-bg: #f6edd4;--pos-other: #5f5a54;--pos-other-bg: #eeeae4;color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #16181d;--surface: #1f2228;--ink: #eceae6;--ink-soft: #9a978f;--line: #2e3239;--accent: #3fb9a8;--accent-soft: #1c3431;--forgot: #e2846c;--forgot-soft: #3a2420;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px rgba(0, 0, 0, .35);--pos-noun: #8cbcf0;--pos-noun-bg: #1d2c3d;--pos-verb: #c3a4ec;--pos-verb-bg: #2b2238;--pos-adj: #f0a877;--pos-adj-bg: #3a271c;--pos-adv: #dcc07a;--pos-adv-bg: #352d1a;--pos-other: #aaa59d;--pos-other-bg: #2a2d33;color-scheme:dark}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans Thai,Sarabun,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit}.app{max-width:640px;min-height:100dvh;margin:0 auto;padding:20px 16px calc(20px + env(safe-area-inset-bottom));display:grid;grid-template-rows:auto auto 1fr auto;gap:16px}.top{display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{margin:0 auto 0 0;font-size:1.05rem;letter-spacing:.01em}.brand strong{color:var(--accent)}.levels{display:flex;padding:3px;border-radius:999px;background:var(--surface);border:1px solid var(--line)}.levels button{border:0;background:none;padding:6px 12px;border-radius:999px;font-size:.85rem;font-weight:600;color:var(--ink-soft);cursor:pointer}.levels button[aria-pressed=true]{background:var(--accent);color:#fff}.progress{display:grid;gap:6px}.progress-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px}.progress p{margin:0;font-size:.85rem;color:var(--ink-soft)}.reset{flex:none;padding:0;border:0;background:none;font:inherit;font-size:.8rem;color:var(--ink-soft);text-decoration:underline;text-underline-offset:3px;cursor:pointer}.reset:hover{color:var(--forgot)}.auto-btn{flex:none;width:36px;height:36px;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);cursor:pointer;transition:color .2s ease,background .2s ease}.auto-btn[data-on=true]{color:var(--accent);background:var(--accent-soft)}.auto-btn[data-on=true] .auto-off,.auto-btn:not([data-on=true]) .auto-on{display:none}.auto{position:fixed;inset:auto;width:max-content;height:max-content;align-content:start;margin:0;padding:14px;display:grid;gap:12px;border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--ink);box-shadow:var(--shadow);font-size:.85rem;opacity:0;transform:translateY(-6px) scale(.97);transform-origin:top right;transition:opacity .18s ease,transform .2s ease,overlay .2s allow-discrete,display .2s allow-discrete}.auto:not(:popover-open){display:none}.auto:popover-open{opacity:1;transform:none}@starting-style{.auto:popover-open{opacity:0;transform:translateY(-6px) scale(.97)}}.auto label{display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}.switch{appearance:none;position:relative;flex:none;width:36px;height:22px;margin:0;border-radius:999px;background:var(--line);cursor:pointer;transition:background .2s ease}.switch:before{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #00000040;transition:transform .25s cubic-bezier(.3,1.4,.5,1),background .2s ease}.switch:checked{background:var(--accent-soft)}.switch:checked:before{background:var(--accent)}.switch:checked:before{transform:translate(14px)}.switch:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.auto-what{position:relative;display:grid;grid-template-columns:1fr 1fr;padding:3px;border-radius:999px;background:var(--surface);border:1px solid var(--line);opacity:.4;transition:opacity .2s ease}.auto:has(.switch:checked) .auto-what{opacity:1}.auto-what:before{content:"";position:absolute;inset:3px auto 3px 3px;width:calc(50% - 3px);border-radius:999px;background:var(--accent-soft);transition:transform .3s cubic-bezier(.3,1.3,.5,1)}.auto-what[data-what=both]:before{transform:translate(100%)}.auto-what button{position:relative;border:0;background:none;padding:4px 12px;border-radius:999px;font:inherit;font-size:.8rem;font-weight:600;color:var(--ink-soft);cursor:pointer;transition:color .2s ease}.auto-what button[aria-pressed=true]{color:var(--accent)}.progress-bar{height:6px;border-radius:999px;background:var(--line);overflow:hidden}.progress-bar span{display:block;height:100%;width:0;background:var(--accent);transition:width .3s ease}.card{align-self:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(24px,6vw,40px);display:grid;cursor:pointer;-webkit-user-select:none;user-select:none;touch-action:pan-y;transition:border-color .15s ease,background .15s ease,box-shadow .2s ease}.card.is-revealed{cursor:grab}.card.is-dragging{cursor:grabbing;box-shadow:0 2px 4px #1d1b1914,0 24px 48px #1d1b192e}.card[data-swipe=knew]{border-color:var(--accent);background:var(--accent-soft)}.card[data-swipe=forgot]{border-color:var(--forgot);background:var(--forgot-soft)}.front{display:grid;justify-items:center;gap:8px;text-align:center;padding:12px 0}.meta{margin:0;display:flex;flex-wrap:wrap;justify-content:center;gap:6px;min-height:24px}.pos{padding:3px 10px;border-radius:999px;font-size:.78rem;font-weight:600;letter-spacing:.01em;background:var(--pos-other-bg);color:var(--pos-other)}.pos[data-pos=noun]{background:var(--pos-noun-bg);color:var(--pos-noun)}.pos[data-pos=verb]{background:var(--pos-verb-bg);color:var(--pos-verb)}.pos[data-pos=adjective]{background:var(--pos-adj-bg);color:var(--pos-adj)}.pos[data-pos=adverb]{background:var(--pos-adv-bg);color:var(--pos-adv)}.word{margin:0;font-size:clamp(2.2rem,10vw,3.4rem);font-weight:700;line-height:1.1;overflow-wrap:anywhere}.word small{display:block;font-size:.9rem;font-weight:500;color:var(--ink-soft)}.word small:empty{display:none}.speak{width:44px;height:44px;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:none;color:var(--accent);cursor:pointer}.speak:hover{background:var(--accent-soft)}.speak-sm{flex:none;width:34px;height:34px}.answer{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .28s ease,opacity .2s ease}.card.is-revealed .answer{grid-template-rows:1fr;opacity:1}.answer-inner{overflow:hidden;min-height:0}.meaning{margin:0;padding-top:20px;border-top:1px solid var(--line);font-size:1.5rem;font-weight:600;text-align:center}.example-row{display:flex;flex-direction:column;align-items:center;gap:8px;margin:14px 0 0}.example-row:has(.example:empty){display:none}.example{margin:0;font-size:1.05rem;line-height:1.55;text-align:center;font-style:italic}.example mark{background:none;color:var(--accent);font-weight:700;font-style:normal}.related{margin:14px 0 0;display:flex;flex-wrap:wrap;justify-content:center;gap:6px 20px;font-size:.95rem}.related-group{display:inline-flex;align-items:baseline;gap:8px}.related-label{font-size:.75rem;color:var(--ink-soft)}.example:empty,.related:empty{display:none}.controls{position:sticky;bottom:calc(12px + env(safe-area-inset-bottom))}.grade{display:grid;grid-template-columns:1fr 1fr;gap:12px}.grade[hidden],.hint[hidden],.card[hidden],.done[hidden],.btn[hidden],.reset[hidden],.auto-btn[hidden],.speak[hidden]{display:none}.done{align-self:center;display:grid;justify-items:center;gap:12px;text-align:center}.done h1{margin:0;font-size:clamp(1.6rem,7vw,2.2rem)}.done p{margin:0 0 12px;color:var(--ink-soft)}.hint{margin:0;min-height:56px;display:flex;align-items:center;justify-content:center;gap:8px;color:var(--ink-soft);font-size:.95rem}.hint-swipe{min-height:0;margin-bottom:10px;font-size:.82rem}.btn{width:100%;min-height:56px;border-radius:16px;border:1px solid transparent;font-size:1.05rem;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px;transition:transform .08s ease,background .15s ease}.btn:active{transform:scale(.98)}.hint kbd,.btn kbd{font:inherit;font-size:.72rem;font-weight:600;padding:2px 6px;border-radius:6px;border:1px solid currentColor;opacity:.55}.btn-forgot{background:var(--forgot-soft);color:var(--forgot)}.btn-knew{background:var(--accent);color:#fff}button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}@media(hover:none){.hint kbd,.btn kbd{display:none}}@media(prefers-reduced-motion:reduce){.answer,.progress-bar span,.btn,.switch,.switch:before,.auto,.auto-btn,.auto-what,.auto-what:before,.auto-what button{transition:none}}