@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700&display=swap');
:root{--green:#183e32;--green2:#285c48;--ink:#232b25;--muted:#737a70;--border:#e4e4d9;--cream:#f8f8f1;--gold:#ac7934}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:'Noto Sans KR',system-ui,sans-serif;font-size:16px;line-height:1.6}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.35}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #b07b27;outline-offset:3px}button{color:inherit}button,a{touch-action:manipulation}a{text-decoration:none;color:inherit}[hidden]{display:none!important}.app{max-width:1800px;margin:auto;display:grid;grid-template-columns:224px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:34px 20px;background:#f0f1e8;border-right:1px solid var(--border);display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;margin:0 6px 54px;font-size:27px;font-weight:700;letter-spacing:-1.4px;line-height:1.3}.brand small{display:block;font-size:12px;letter-spacing:.02em;font-weight:400;color:var(--muted);margin-top:8px}.brandmark{width:40px;height:43px;position:relative;flex-shrink:0}.brandmark i{width:27px;height:27px;border-radius:50%;position:absolute;left:0;bottom:0;background:radial-gradient(circle at 32% 25%,#555b52,#141814 70%);box-shadow:0 2px 2px #0003}.brandmark i+i{left:14px;bottom:17px;background:radial-gradient(circle at 30% 25%,white,#e2e1d6 80%)}.nav-label{font-size:12px;color:#858a7c;letter-spacing:.08em;margin:0 16px 14px}nav{display:grid;gap:8px}.nav-item{display:flex;align-items:center;gap:14px;text-align:left;padding:14px 16px;background:none;border:0;border-radius:8px;font-size:15px}.nav-item span{font-size:23px;line-height:1}.nav-item.active{background:var(--green);color:white;font-weight:600}.nav-item:hover:not(.active){background:#e5e8db}.sidebar-bottom{margin-top:auto;padding:24px 15px 6px;border-top:1px solid #d9ddcf}.sidebar-bottom p{font-family:serif;font-size:23px;line-height:1.7;margin:12px 0 16px}.sidebar-bottom small{font-size:12px;color:var(--muted)}.stone-pair{font-size:30px;letter-spacing:-9px;color:var(--green)}.main-shell{min-width:0}header{height:82px;padding:0 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);background:#fbfbf5}.breadcrumb{font-size:14px;color:var(--muted)}.breadcrumb span{padding:0 13px;color:#b8bcb1}.breadcrumb b{font-weight:500;color:var(--ink)}.version{font-size:12px;color:#767e6e;border:1px solid #dfe3d6;border-radius:30px;padding:5px 12px}main{padding:34px 40px 18px;max-width:1450px;margin:auto}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--gold);font-weight:600}h1{font-size:30px;letter-spacing:-1.3px;font-weight:600;line-height:1.35;margin:8px 0 10px}.page-heading p{margin:0;color:var(--muted);font-size:14px}.button{border:1px solid transparent;border-radius:7px;padding:10px 15px;font-size:14px;min-height:43px;font-weight:500;white-space:nowrap}.button.primary{background:var(--green);color:#fff}.button.primary:hover{background:var(--green2)}.button.outline{border-color:#dbdfd2;background:#fdfdf8}.button.outline:hover{background:#eef1e5}.button.quiet{background:none;color:var(--muted)}.button.full{width:100%}.workspace{display:grid;grid-template-columns:minmax(320px,1.7fr) minmax(280px,1fr);gap:25px;align-items:start}.board-card{background:#fdfdf9;border:1px solid var(--border);border-radius:13px;padding:22px;box-shadow:0 5px 20px #24332404}.board-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.board-tabs{display:flex;gap:3px;padding:3px;border:1px solid #e5e7dc;background:#f0f2e9;border-radius:7px}.board-tabs button{background:transparent;border:0;padding:7px 12px;font-size:14px;border-radius:4px;min-height:36px}.board-tabs button.selected{background:white;box-shadow:0 1px 4px #0001;color:var(--green);font-weight:600}.size-label{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:7px}select{padding:6px;border:1px solid var(--border);border-radius:5px;background:#fff;color:var(--ink);font-size:14px;min-height:35px}.player-strip{display:flex;justify-content:space-between;align-items:center;gap:6px;font-size:13px;padding:23px 0 18px}.player-strip>div{display:flex;gap:7px;align-items:center;min-width:0}.player-strip b{font-size:14px;max-width:90px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.player-strip small{font-size:12px;color:var(--muted);white-space:nowrap}#turnLabel{font-size:12px;color:var(--green);padding:3px 9px;border:1px solid #d8dfce;border-radius:20px;white-space:nowrap}.player-stone{display:inline-block;width:17px;height:17px;border-radius:100%;flex-shrink:0}.black{background:radial-gradient(circle at 35% 25%,#62665f,#151715 75%)}.white{background:radial-gradient(circle at 35% 25%,#fff,#e0e0d5 85%);border:1px solid #deded3}.board-wrap{padding:9px;background:#d5a764;border-radius:8px;box-shadow:0 2px 8px #63401622,inset 0 0 0 1px #b78943}.board{aspect-ratio:1;position:relative;background:linear-gradient(100deg,#ebc387,#dfb273 50%,#e9c184);border-radius:2px;user-select:none}.board svg{position:absolute;width:100%;height:100%;inset:0;pointer-events:none}.point{position:absolute;transform:translate(-50%,-50%);padding:0;border:0;border-radius:100%;background:none;display:grid;place-items:center;z-index:1}.point:not(.occupied):hover{background:#184d3529}.point:focus-visible{outline-offset:0;z-index:3}.point.occupied.black{background:radial-gradient(circle at 35% 23%,#626762 0%,#292d29 35%,#0b0e0b 80%);box-shadow:1px 2px 3px #0005}.point.occupied.white{background:radial-gradient(circle at 34% 20%,#fff 5%,#f5f5ed 48%,#d9d8ca 93%);box-shadow:1px 2px 3px #4b371a55;border:1px solid #d7d4bc}.point .last-dot{width:22%;height:22%;border-radius:100%;background:#e2be75}.point.white .last-dot{background:var(--green)}.point .hint-ring{width:85%;height:85%;border:3px solid #24664b;border-radius:100%}.board-caption{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding:14px 0 4px;gap:10px}.playback{display:flex;align-items:center;justify-content:center;gap:10px;margin:10px 0}.playback button{width:40px;height:36px;border:0;background:none;font-family:system-ui;font-size:26px;border-radius:5px;line-height:1}.playback button:hover:not(:disabled){background:#edf0e5}#moveCounter{font-size:14px;min-width:84px;text-align:center}#timeline{width:100%;accent-color:var(--green);height:5px;display:block;margin:16px 0 20px}.board-actions{display:flex;gap:8px;flex-wrap:wrap}.board-actions .quiet{margin-left:auto}.study-panel{display:grid;gap:18px}.tutor-card,.analysis-card,.settings-card{background:#fdfdf9;border:1px solid var(--border);border-radius:12px;padding:23px}.tutor-title{display:flex;align-items:center;gap:10px;padding-bottom:19px;border-bottom:1px solid var(--border);margin-bottom:20px}.tutor-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:#e9eee1;color:var(--green);font-size:26px;flex-shrink:0}h2{font-size:16px;margin:0;font-weight:600;letter-spacing:-.4px}.tutor-title small{font-size:12px;color:var(--muted)}.tag{font-size:12px;color:var(--green);background:#eaf0e3;padding:3px 8px;border-radius:4px;white-space:nowrap}.tutor-title .tag{margin-left:auto}.tag.muted{background:#f1eee4;color:#8b795a}#lessonContent h3{font-size:19px;margin:0 0 14px;letter-spacing:-.5px}#lessonContent p{font-size:15px;line-height:1.85;color:#626a5f;margin:0 0 15px}#lessonContent .step{display:flex;gap:12px;font-size:14px;align-items:start;margin:16px 0}#lessonContent .step b{display:grid;place-items:center;background:#eef1e6;color:var(--green);width:24px;height:24px;border-radius:50%;font-size:12px;flex-shrink:0}#lessonContent .small-label{font-size:12px;color:var(--gold);letter-spacing:.03em;margin:0 0 10px}.lesson-actions{display:flex;gap:9px;margin-top:16px}.lesson-actions>*{flex:1}.section-title{display:flex;align-items:center;justify-content:space-between;gap:8px}.analysis-card p{font-size:14px;color:var(--muted);line-height:1.8;margin:15px 0}.analysis-empty{display:flex;justify-content:space-between;background:#f4f5ed;border-radius:8px;padding:17px 12px;margin-bottom:18px;text-align:center;gap:10px}.analysis-empty span{display:block;font-size:12px;color:var(--muted)}.analysis-empty strong{display:block;font-size:24px;font-weight:400;color:#a8afa0;line-height:1.7}.analysis-card .fineprint{font-size:12px;text-align:center;margin:10px 0 0}.settings-card>div{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin:14px 0}.settings-card input{width:70px;padding:5px;border:1px solid var(--border);border-radius:5px;background:#fff;text-align:center;font-size:14px}.settings-card p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}.local-note{text-align:center;font-size:12px;color:#8a9082;line-height:1.8}footer{padding:25px 40px;display:flex;justify-content:space-between;color:#8a9082;font-size:12px}footer span{font-size:12px}.lesson-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:25px}.lesson-choice{text-align:left;padding:15px 18px;border:1px solid var(--border);background:#fffef8;border-radius:9px}.lesson-choice small{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}.lesson-choice strong{font-size:15px;font-weight:500}.lesson-choice.active{background:#e8eee0;border-color:#a5b798}.lesson-choice .completed{color:var(--green)}.feedback{font-size:14px;border-radius:8px;padding:14px;background:#edf3e5;color:#234931;line-height:1.8;margin-top:12px}.feedback.error{background:#f9efe2;color:#865826}.edit-toolbar{display:flex;gap:5px;align-items:center;margin-top:14px;flex-wrap:wrap;font-size:12px}.edit-toolbar button{font-size:13px;background:#f5f5ec;padding:5px 9px;border:1px solid var(--border);border-radius:5px}.edit-toolbar button.selected{border-color:var(--green);color:var(--green);background:#e8eedf}.edit-toolbar label{margin-left:auto}.edit-toolbar select{font-size:12px;padding:2px;min-height:30px}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);padding:13px 21px;background:var(--green);color:white;border-radius:10px;font-size:14px;max-width:calc(100vw - 30px);width:max-content;z-index:100;box-shadow:0 5px 25px #0003}dialog{border:1px solid #dce2d3;border-radius:16px;max-width:460px;width:calc(100% - 32px);padding:30px;background:#fdfdf7;color:var(--ink);box-shadow:0 20px 100px #0003}dialog::backdrop{background:#12221966;backdrop-filter:blur(3px)}dialog h2{font-size:23px;margin:5px 0 15px}dialog p,dialog li{font-size:15px;color:#666f60;line-height:1.8}dialog ol{padding-left:20px}dialog li{margin:12px 0}.dialog-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:24px}.close{position:absolute;right:14px;top:12px;border:0;background:none;font-size:25px;width:35px;height:35px}.info-note{font-size:13px;background:#eff2e7;border-radius:8px;padding:15px;margin:20px 0}.sgf-info{font-size:12px;background:#f2f3e9;padding:12px;border-radius:6px;overflow-wrap:anywhere}.review-import{margin-top:12px}.mobile-confirm{display:flex;gap:8px;align-items:center;margin:10px 0 0;font-size:14px}.mobile-confirm button{margin-left:auto}
@media(min-width:1500px){main{padding-top:42px}.workspace{grid-template-columns:minmax(500px,1.8fr) minmax(300px,1fr)}.board-card{padding:28px}.study-panel{gap:22px}}
@media(max-width:1180px){.app{grid-template-columns:185px minmax(0,1fr)}.sidebar{padding:30px 12px}.brand{font-size:24px;gap:8px}.brandmark{transform:scale(.85)}main{padding:26px 23px}.workspace{gap:18px;grid-template-columns:minmax(300px,1.45fr) minmax(260px,1fr)}header{padding:0 23px}.board-card{padding:16px}.tutor-card,.analysis-card,.settings-card{padding:18px}.player-strip small{display:none}.size-label{font-size:0}.size-label select{font-size:14px}.board-actions{gap:5px}.board-actions .button{padding:8px 10px;font-size:13px}.board-tabs button{padding:7px 9px}}
@media(max-width:900px){.app{grid-template-columns:1fr}.sidebar{position:relative;height:auto;padding:18px 22px 0;border-right:0;border-bottom:1px solid var(--border);display:block}.brand{margin:0 0 18px;font-size:25px}.brand small{display:none}.brandmark{height:34px}.brandmark i+i{bottom:10px}.nav-label,.sidebar-bottom{display:none}nav{display:flex;gap:16px}.nav-item{padding:10px 5px 14px;border-radius:0;font-size:14px;gap:7px}.nav-item.active{background:none;color:var(--green);box-shadow:inset 0 -3px var(--green)}.nav-item span{font-size:18px}header{display:none}main{padding:24px}.page-heading{margin-bottom:22px}h1{font-size:27px}.workspace{grid-template-columns:minmax(310px,1.45fr) minmax(245px,1fr);gap:16px}.lesson-picker{gap:8px}.lesson-choice{padding:12px}.lesson-choice strong{font-size:14px}}
@media(max-width:680px){.sidebar{padding:16px 18px 0}nav{gap:22px;justify-content:space-between}.nav-item{font-size:14px}.nav-item span{display:none}main{padding:24px 14px 12px}.page-heading{gap:10px;align-items:flex-end}.eyebrow{font-size:11px}h1{font-size:25px;letter-spacing:-1px;margin:5px 0 8px}.page-heading p{font-size:13px;max-width:245px}.page-heading>.button{width:44px;min-width:44px;font-size:22px;padding:0;height:44px}.page-heading>.button span{display:none}.workspace{grid-template-columns:1fr;gap:18px}.board-card{padding:14px;border-radius:10px}.board-wrap{padding:6px}.board-top{gap:10px}.size-label{font-size:12px}.player-strip{padding:16px 0 14px}.player-strip small{display:inline;font-size:11px}.board-caption{padding-top:12px}.board-actions .button{font-size:13px;flex:1;padding:9px 7px}.board-actions .quiet{margin-left:0}.playback{margin:8px 0}.tutor-card,.analysis-card,.settings-card{padding:20px}.tutor-card{border-top:3px solid var(--green)}.lesson-picker{gap:6px;margin-bottom:16px}.lesson-choice{padding:10px 8px}.lesson-choice small{font-size:11px}.lesson-choice strong{font-size:12px;letter-spacing:-.3px}.study-panel{gap:14px}footer{padding:24px 16px}.toast{bottom:16px}.board-tabs button{min-height:38px}#timeline{height:8px}.edit-toolbar label{margin-left:0}dialog{padding:24px}.size-label select{max-width:70px}.point:focus-visible{outline-width:2px}}
@media(prefers-reduced-motion:no-preference){button{transition:background .15s,box-shadow .15s}.point.occupied{animation:place .15s ease-out}@keyframes place{from{opacity:.6}to{opacity:1}}}