:root{--bg: #fff;--surface: #f2f4f8;--text: #16202f;--sub: #566176;--line: #dce1e9;--accent: #2f6fed;--accent-text: #2259c9;--on-accent: #fff;--right: #12803f;--right-bg: #e4f6ea;--wrong: #c5303a;--wrong-bg: #fdeaea;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #14181f;--surface: #1f252e;--text: #eef1f5;--sub: #a4aebc;--line: #313946;--accent: #5b8cff;--accent-text: #92b3ff;--on-accent: #0b1220;--right: #55d392;--right-bg: #12301f;--wrong: #ff8a8a;--wrong-bg: #3a1a1c}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,Noto Sans KR,sans-serif;word-break:keep-all;overflow-wrap:anywhere}:lang(zh){word-break:normal;font-family:PingFang SC,Microsoft YaHei,Noto Sans CJK SC,Noto Sans SC,sans-serif}.pinyin{font-family:system-ui,sans-serif}main{display:flex;flex-direction:column;max-width:560px;min-height:100vh;min-height:100dvh;margin:0 auto;padding:0 16px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.icon{flex:none;width:22px;height:22px}select,button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button{min-height:44px;padding:10px 14px;background:var(--bg);border:1.5px solid var(--line);border-radius:12px}button:active:not(:disabled){background:var(--surface)}button:disabled{cursor:default}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}select{-webkit-appearance:none;-moz-appearance:none;appearance:none;min-height:44px;padding:8px 30px 8px 12px;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%238a94a6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m1 1.5 5 5 5-5'/%3E%3C/svg%3E") no-repeat right 11px center;border:0;border-radius:12px}button.primary{display:block;width:100%;min-height:52px;font-weight:700;color:var(--on-accent);background:var(--accent);border-color:var(--accent)}button.primary:active:not(:disabled){background:var(--accent);filter:brightness(.92)}button.primary:disabled{opacity:.45}.icon-button{display:inline-flex;flex:none;align-items:center;justify-content:center;width:44px;height:44px;padding:0;background:none;border:0}.text-button{flex:none;padding:8px;color:var(--sub);font-size:.9rem;background:none;border:0}header{position:sticky;top:0;z-index:5;display:flex;flex:none;align-items:center;gap:2px;min-height:56px;background:var(--bg)}header select{flex:0 1 auto;min-width:0;font-weight:600}.stats{margin-left:auto;padding:0 6px;color:var(--sub);font-size:.9rem;font-variant-numeric:tabular-nums;white-space:nowrap}.later:only-child{margin-left:auto}@media(max-width:340px){.stats-word{display:none}}.tabs{position:sticky;bottom:0;z-index:5;display:flex;flex:none;margin:0 -16px;background:var(--bg);border-top:1px solid var(--line)}.tabs button{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:center;gap:1px;min-height:56px;padding:4px 0;color:var(--sub);font-size:.75rem;font-weight:600;background:none;border:0;border-radius:0}.tabs button[aria-current=page]{color:var(--accent-text)}@media(min-height:700px){header.study-only,.icon-button.short-only,.text-button.short-only{display:none}}@media(max-height:699.98px){.tabs{display:none}}.status{position:fixed;top:60px;right:16px;left:16px;z-index:6;max-width:528px;margin:0 auto;padding:8px 12px;color:var(--bg);font-size:.85rem;background:var(--text);border-radius:10px}.empty{margin:auto;color:var(--sub)}.sub{margin:4px 0 0;color:var(--sub);font-size:.95rem;font-weight:400}.chip{display:inline-block;flex:none;padding:2px 8px;color:var(--sub);font-size:.8rem;font-weight:600;background:var(--surface);border-radius:6px}.chip.new{color:var(--accent-text);background:color-mix(in srgb,var(--accent) 13%,var(--bg))}.chip.wrong{color:var(--wrong);background:var(--wrong-bg)}.quiz{display:flex;flex:1;flex-direction:column;padding-bottom:4px}.quiz-head{display:flex;flex:1;flex-direction:column;justify-content:center;padding:8px 0 16px}.quiz.order .quiz-head{justify-content:flex-start}.seen{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 12px;color:var(--sub);font-size:.875rem}.label{margin:0;color:var(--sub);font-size:.95rem}.prompt{margin-top:6px;font-size:1.4rem;font-weight:700;line-height:1.4;text-wrap:pretty}.quiz.meaning .prompt{font-size:1.9rem;line-height:1.25}button.listen{display:inline-flex;align-items:center;gap:10px;min-height:64px;padding:0 28px;color:var(--accent-text);font-size:1.15rem;background:color-mix(in srgb,var(--accent) 13%,var(--bg));border:0;border-radius:32px}button.listen:active:not(:disabled){background:color-mix(in srgb,var(--accent) 22%,var(--bg))}.gone{visibility:hidden}.row{display:flex;gap:8px;margin-top:4px}.row button{flex:1;color:var(--sub);font-size:.95rem;background:none;border:0}.choices{display:grid;gap:8px;margin:0;padding:0;list-style:none}.choices button{position:relative;display:block;width:100%;min-height:52px;padding:12px 42px 12px 16px;line-height:1.4;text-align:left;border-radius:14px}.choices button:disabled{color:var(--sub)}.choices .explain{display:block;margin-top:2px;color:var(--sub);font-size:.85rem}.choices button.right,.choices button.wrong{color:var(--text)}button.right{background:var(--right-bg);border-color:var(--right)}button.wrong{background:var(--wrong-bg);border-color:var(--wrong)}button.right:after,button.wrong:after{position:absolute;top:50%;right:16px;font-weight:700;translate:0 -50%}button.right:after{color:var(--right);content:"✓"}button.wrong:after{color:var(--wrong);content:"✕"}.tiles,.answer-size{display:flex;flex-wrap:wrap;align-content:flex-start;gap:8px}.tiles button,.answer-size span{min-height:44px;padding:8px 14px;border:1.5px solid transparent}.tiles button{border-color:var(--line)}.answer-line{display:grid;grid-template-columns:minmax(0,1fr);margin-top:16px;padding-bottom:6px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 48px,var(--line) 48px,var(--line) 50px,transparent 50px,transparent 52px)}.answer-line>*{grid-area:1 / 1}.bank{margin-bottom:12px}.bank button.used{color:transparent;background:var(--surface);border-color:transparent}.feedback{position:fixed;right:0;bottom:0;left:0;z-index:10;display:flex;flex-direction:column;max-width:560px;max-height:80vh;max-height:80dvh;margin:0 auto;overflow:hidden;background:var(--bg);border-radius:20px 20px 0 0;box-shadow:0 -6px 28px #0000002e;animation:sheet-up .2s ease-out}@keyframes sheet-up{0%{transform:translateY(100%)}}@media(prefers-reduced-motion:reduce){.feedback{animation:none}}.verdict{flex:none;margin:0;padding:14px 20px;font-size:1.2rem;font-weight:700}.feedback.right .verdict{color:var(--right);background:var(--right-bg)}.feedback.wrong .verdict{color:var(--wrong);background:var(--wrong-bg)}.feedback.right .verdict:before{content:"✓ "}.feedback.wrong .verdict:before{content:"✕ "}.feedback-body{flex:1 1 auto;min-height:0;padding:14px 20px 8px;overflow-y:auto;overscroll-behavior:contain}.feedback-body p{margin:0}.answer-expression{font-size:1.25rem;font-weight:700;line-height:1.35}.pronunciation{margin-left:6px;color:var(--sub);font-size:.9rem;font-weight:400}.example{display:flex;align-items:flex-start;justify-content:space-between;gap:4px;margin-top:12px;padding:10px 4px 12px 14px;background:var(--surface);border-radius:12px}.feedback-body .note{margin-top:12px;color:var(--sub);font-size:.9rem}.note .chip{margin-left:6px}.feedback-body .others-title{margin-top:16px;color:var(--sub);font-size:.85rem;font-weight:600}.others{margin:6px 0 0;padding:0;list-style:none}.others li{padding:8px 0;border-top:1px solid var(--line)}.others .explain{display:block;color:var(--sub);font-size:.85rem}.others .chip{margin-left:6px}.feedback>button.primary{flex:none;width:auto;margin:8px 20px 14px}.voice-link{display:inline-flex;align-items:center;gap:6px;margin-top:6px}.panel{flex:1;padding-bottom:24px}.panel-head{display:flex;align-items:center;justify-content:space-between;min-height:56px;margin-bottom:4px}.panel-head h2{margin:0;font-size:1.25rem}.sub-head{justify-content:flex-start;gap:2px;margin-left:-10px}.today{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:12px}.today p{margin:0;padding:10px 12px;color:var(--sub);font-size:.8rem;background:var(--surface);border-radius:12px}.today b{display:block;color:var(--text);font-size:1.35rem;font-variant-numeric:tabular-nums;line-height:1.3}.profile{display:flex;align-items:center;gap:12px;margin-bottom:8px}.profile p{min-width:0;margin:0}.profile b{display:block;font-size:1.15rem}.profile .sub{display:block;margin:0}.avatar{display:flex;flex:none;align-items:center;justify-content:center;width:56px;height:56px;color:var(--accent-text);font-size:1.35rem;font-weight:700;background:color-mix(in srgb,var(--accent) 13%,var(--bg));border-radius:50%}.sec{margin:20px 0 6px;color:var(--sub);font-size:.85rem;font-weight:600}.group{overflow:hidden;background:var(--surface);border-radius:14px}.item{display:flex;align-items:center;gap:8px;width:100%;min-height:52px;padding:10px 14px;text-align:left;background:none;border:0;border-top:1px solid var(--line);border-radius:0}.item:first-child{border-top:0}.item-value{min-width:0;margin-left:auto;color:var(--sub);font-size:.9rem;text-align:right}.item .icon{width:16px;height:16px;color:var(--sub)}button.wide{display:block;width:100%;min-height:50px;margin-top:14px;font-weight:600}button.danger{color:var(--wrong)}.delete-list{margin:12px 0;padding:12px 14px 12px 32px;background:var(--surface);border-radius:14px}.delete-list li+li{margin-top:6px}.delete-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:16px}.delete-actions button{min-height:50px;font-weight:600}.filter{display:flex;gap:4px;margin-bottom:8px;padding:4px;background:var(--surface);border-radius:14px}.filter button{flex:1;padding:6px 4px;color:var(--sub);font-size:.9rem;background:none;border:0;border-radius:10px}.filter button.on{color:var(--text);font-weight:600;background:var(--bg)}.history-list{margin:0;padding:0;list-style:none}.history-list button{display:flex;align-items:flex-start;gap:10px;width:100%;padding:12px 4px;text-align:left;background:none;border:0;border-bottom:1px solid var(--line);border-radius:0}.mark{flex:none;width:18px;font-weight:700}.mark.right{color:var(--right)}.mark.wrong{color:var(--wrong)}.history-text{flex:1;min-width:0}.history-meta{display:flex;justify-content:space-between;gap:8px;margin-top:2px;color:var(--sub);font-size:.85rem}.settings label{display:block;margin:12px 0;color:var(--sub);font-size:.9rem}.settings input,.settings select{display:block;width:100%;margin-top:4px;font:inherit;color:var(--text)}.settings input{min-height:44px;padding:10px 12px;background:var(--surface);border:0;border-radius:12px}.settings label.inline{display:flex;align-items:center;gap:10px;min-height:44px;color:var(--text);font-size:1rem}.settings label.inline input{flex:none;width:20px;min-height:0;height:20px;margin:0;accent-color:var(--accent)}.settings .input-row{display:flex;align-items:flex-end;gap:8px}.settings .input-row label{flex:1;min-width:0}.settings .input-row button{display:inline-flex;flex:none;align-items:center;gap:6px;margin-bottom:12px;white-space:nowrap}.settings .bad{color:var(--wrong)}.login{display:flex;flex:1;flex-direction:column;justify-content:center;padding:24px 0}.login-hero{margin-bottom:32px;text-align:center}.login-hero img{display:block;margin:0 auto 14px;border-radius:18px}.login-hero h1{margin:0;font-size:1.6rem}.login-hero .sub{text-wrap:balance}.social{display:flex;justify-content:center;gap:24px;margin-bottom:24px}.social-button{display:flex;flex-direction:column;align-items:center;gap:6px;padding:0;color:var(--text);font-size:13px;background:none;border:0}.social-button:active:not(:disabled){background:none;opacity:.7}.social-icon{display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:50%}.social-icon svg{width:26px;height:26px}.social-icon.google{background:#fff;border:1px solid #dadce0}.social-icon.kakao{background:#fee500}.social-icon.naver{background:#03c75a}.social-icon.naver svg{width:20px;height:20px}.email-toggle{width:100%}