:root{--text: #6b6375;--text-h: #08060d;--bg: #fff;--border: #e5e4e7;--code-bg: #f4f3ec;--accent: #aa3bff;--accent-bg: rgba(170, 59, 255, .1);--accent-border: rgba(170, 59, 255, .5);--social-bg: rgba(244, 243, 236, .5);--shadow: rgba(0, 0, 0, .1) 0 10px 15px -3px, rgba(0, 0, 0, .05) 0 4px 6px -2px;--sans: system-ui, "Segoe UI", Roboto, sans-serif;--heading: system-ui, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(max-width:1024px){:root{font-size:16px}}@media(prefers-color-scheme:dark){:root{--text: #9ca3af;--text-h: #f3f4f6;--bg: #16171d;--border: #2e303a;--code-bg: #1f2028;--accent: #c084fc;--accent-bg: rgba(192, 132, 252, .15);--accent-border: rgba(192, 132, 252, .5);--social-bg: rgba(47, 48, 58, .5);--shadow: rgba(0, 0, 0, .4) 0 10px 15px -3px, rgba(0, 0, 0, .25) 0 4px 6px -2px}#social .button-icon{filter:invert(1) brightness(2)}}*,*:before,*:after{box-sizing:border-box}#root{width:720px;max-width:100%;margin:0 auto;text-align:center;min-height:100svh;display:flex;flex-direction:column;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}body{margin:0}h1,h2{font-family:var(--heading);font-weight:500;color:var(--text-h)}h1{font-size:32px;letter-spacing:-.5px;margin:28px 0 4px}h2{font-size:24px;line-height:118%;letter-spacing:-.24px;margin:0 0 8px}@media(max-width:1024px){h2{font-size:20px}}p{margin:0}button{font:inherit;touch-action:manipulation;-webkit-tap-highlight-color:transparent}code,.counter{font-family:var(--mono);display:inline-flex;border-radius:4px;color:var(--text-h)}code{font-size:15px;line-height:135%;padding:4px 8px;background:var(--code-bg)}.install-banner{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;padding:10px 16px;background:var(--accent-bg);border-bottom:1px solid var(--accent-border);font-size:14px}.install-banner button{font-family:var(--mono);border-radius:4px}.tab-nav{display:flex;justify-content:center;gap:4px;padding-top:16px;border-bottom:1px solid var(--border)}.tab-btn{padding:10px 20px;border:none;background:none;color:var(--text);font-size:15px;font-weight:500;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}.tab-btn:hover{color:var(--text-h)}.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}.screen{flex:1;padding:8px 24px 48px}.screen.has-sticky-footer{padding-bottom:110px}.sticky-footer{position:fixed;left:0;right:0;bottom:0;max-width:720px;margin:0 auto;padding:12px 24px calc(12px + env(safe-area-inset-bottom));background:var(--bg);border-top:1px solid var(--border)}.sticky-footer .primary-btn{width:100%}.subtitle{color:var(--text);font-size:15px;margin-bottom:20px}.ipa{font-family:var(--mono);color:var(--text);font-size:.85em}.search-input{width:100%;max-width:420px;padding:10px 14px;margin-bottom:20px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text-h);font-size:16px}.search-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.no-matches{color:var(--text);font-size:14px;margin-bottom:12px}.word-list{list-style:none;margin:0 0 28px;padding:0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.added-section{margin:-8px 0 24px;padding-top:16px;border-top:1px solid var(--border)}.added-section .subtitle{margin-bottom:10px}.added-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 8px 8px 14px;border-radius:999px;background:var(--accent-bg);border:1px solid var(--accent-border);color:var(--accent);font-size:15px}.added-chip-remove{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border:none;border-radius:50%;background:none;color:var(--accent);font-size:16px;line-height:1;cursor:pointer}.added-chip-remove:hover{background:var(--accent-border)}.word-btn{display:inline-flex;align-items:baseline;gap:6px;padding:8px 14px;border:1px solid var(--border);border-radius:999px;background:var(--bg);color:var(--text-h);cursor:pointer;transition:border-color .15s,background .15s}.word-btn:hover:not(:disabled){border-color:var(--accent)}.word-btn:disabled{background:var(--accent-bg);border-color:var(--accent-border);color:var(--accent);cursor:default}.primary-btn{padding:12px 28px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-size:16px;font-weight:500;cursor:pointer;transition:opacity .15s}.primary-btn:hover:not(:disabled){opacity:.9}.primary-btn:disabled{background:var(--border);color:var(--text);cursor:not-allowed}.review-card{max-width:460px;margin:24px auto 0;padding:40px 32px;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.word-display{font-size:40px;margin:8px 0 24px}.cloze-sentence{font-size:22px;line-height:145%;color:var(--text-h);margin:8px 0 24px}.produce-input{width:100%;margin:16px 0;padding:10px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text-h);font:inherit;resize:vertical}.produce-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.review-back{margin-top:8px;display:flex;flex-direction:column;align-items:center;gap:16px}.audio-row{display:flex;gap:8px}.audio-btn{padding:8px 16px;border:1px solid var(--border);border-radius:999px;background:var(--bg);color:var(--text-h);cursor:pointer}.audio-btn:hover{border-color:var(--accent)}.example{color:var(--text-h);background:var(--code-bg);border-radius:10px;padding:14px 18px;font-size:15px;line-height:145%}.grade-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.grade-btn{padding:10px 18px;border:none;border-radius:10px;color:#fff;font-size:15px;font-weight:500;cursor:pointer;transition:opacity .15s}.grade-btn:hover{opacity:.88}.grade-again{background:#e5484d}.grade-hard{background:#f5a524}.grade-good{background:#30a46c}.grade-easy{background:#3b82f6}.quiz-mode-toggle{justify-content:center;border-bottom:none;margin-bottom:8px}.quiz-replay{font-size:20px;padding:14px 28px;margin-bottom:16px}.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0 20px}.quiz-option{padding:14px 10px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text-h);cursor:pointer;font-size:17px;transition:border-color .15s,background .15s}.quiz-option:hover:not(:disabled){border-color:var(--accent)}.quiz-option:disabled{cursor:default}.quiz-option-correct{background:#e6f6ee;border-color:#30a46c;color:#1c6b46}.quiz-option-wrong{background:#fdecec;border-color:#e5484d;color:#a02}@media(prefers-color-scheme:dark){.quiz-option-correct{background:#30a46c33;color:#6fd39a}.quiz-option-wrong{background:#e5484d33;color:#f5a3a3}}@media(max-width:600px){.screen{padding:8px 16px 32px}.tab-nav{padding-top:max(16px,env(safe-area-inset-top))}.tab-btn{flex:1;padding:10px 8px}h1{font-size:26px;margin:20px 0 4px}.word-list{flex-direction:column;align-items:stretch;gap:10px}.word-btn{width:100%;justify-content:space-between;padding:14px 16px;font-size:17px}.added-chip{width:100%;justify-content:space-between;padding:10px 10px 10px 16px}.review-card{padding:28px 20px}.word-display{font-size:32px}.grade-row{display:grid;grid-template-columns:1fr 1fr}.grade-btn{padding:14px 8px}.quiz-option{padding:16px 8px;font-size:16px}}