:root{color-scheme:light;--bg:#f5f6f2;--card:#fff;--text:#293b31;--muted:#69766c;--accent:#4c705a;--soft:#edf2eb;--line:#e6eae3;--track:#edf0e9;--shadow:0 3px 18px #253e2d03}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;font-size:14px;line-height:1.6}body[data-theme=dark]{color-scheme:dark;--bg:#171e1b;--card:#222c26;--text:#e1e9df;--muted:#a0aea3;--accent:#9cc3a2;--soft:#303e33;--line:#364239;--track:#344137;--shadow:none}button,input,select{font:inherit}button,summary,select{cursor:pointer}button{border:0;transition:background .15s,transform .15s}button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button:hover:not(:disabled){filter:brightness(.95)}input,select{min-width:0;color:var(--text);background:var(--card);border:1px solid var(--line);border-radius:9px;padding:11px 12px}input{width:100%}.app{max-width:1192px;padding:0 40px;margin:auto}header{height:106px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text);font-weight:700;font-size:21px;letter-spacing:-.5px}.brand small{display:block;font-size:10px;font-weight:400;letter-spacing:1.1px;color:var(--muted);margin-top:1px}.brand-icon{display:flex;align-items:center;justify-content:center;background:var(--accent);color:var(--card);width:41px;height:43px;border-radius:13px;font-size:28px}.brand-icon span{font-size:20px;margin-top:18px;margin-left:-2px}.icon-button{width:43px;height:43px;border:1px solid var(--line);border-radius:50%;font-size:25px;background:var(--card);color:var(--text)}.intro{display:flex;align-items:center;justify-content:space-between;padding:35px 0 29px}.eyebrow{font-size:10px;letter-spacing:2px;color:var(--accent);font-weight:650;margin:0 0 8px}h1{font-size:27px;letter-spacing:1px;margin:0 0 8px;font-weight:650}.intro p:last-child{color:var(--muted);margin:0;font-size:12px}.date{color:var(--muted);font-size:12px}.workspace{display:grid;grid-template-columns:420px 1fr;gap:24px;align-items:start}.card{background:var(--card);border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow)}.timer-card{padding:25px 28px 0}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}h2{font-size:14px;font-weight:650;margin:0}.badge{display:flex;align-items:center;gap:6px;font-size:10px;color:var(--accent);background:var(--soft);padding:4px 8px;border-radius:12px;white-space:nowrap}.badge span,.chart-legend>span{width:5px;height:5px;background:var(--accent);border-radius:50%}.modes{display:flex;background:var(--bg);padding:4px;border-radius:10px;margin-top:25px;gap:3px}.modes button{flex:1;background:transparent;color:var(--muted);border-radius:7px;padding:10px 2px;font-size:12px;white-space:nowrap}.modes button[aria-pressed=true]{background:var(--card);color:var(--accent);box-shadow:0 1px 5px #00000009;font-weight:650}.dial{position:relative;max-width:282px;aspect-ratio:1;margin:25px auto 22px}.dial svg{width:100%;height:100%;transform:rotate(-90deg);fill:none;stroke-width:6}.track{stroke:var(--track)}#progress{stroke:var(--accent);stroke-linecap:round;stroke-dasharray:100;stroke-dashoffset:0}.dial-content{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column}.dial-content>span:first-child{font-size:10px;color:var(--accent);letter-spacing:2.5px}.dial-content strong{font-size:61px;line-height:1.5;font-weight:450;letter-spacing:-2px;font-variant-numeric:tabular-nums}.dial-content>span:last-child{font-size:11px;color:var(--muted)}.subject-select label{display:block;font-size:11px;color:var(--muted);margin-bottom:7px}.subject-select select{width:100%;font-size:12px}.timer-actions{display:flex;gap:10px;margin-top:16px}.primary{flex:1;background:var(--accent);color:var(--card);border-radius:10px;padding:14px;font-weight:600;letter-spacing:1px}.reset{background:var(--soft);color:var(--accent);width:52px;border-radius:10px;font-size:25px}.timer-note{text-align:center;color:var(--muted);font-size:10px;line-height:1.9;margin:16px 0 22px}details{border-top:1px solid var(--line)}summary{padding:17px 0;font-size:11px;color:var(--text)}summary span{float:right;font-size:10px;color:var(--muted)}.settings-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.settings-grid label{font-size:10px;color:var(--muted)}.settings-grid input{margin-top:5px;padding:8px;width:100%}#settings-form{padding-bottom:20px}.hint{color:var(--muted);font-size:10px;line-height:1.9}.secondary{background:var(--soft);color:var(--accent);border-radius:8px;padding:10px 13px;white-space:nowrap;font-size:11px}.insights{display:grid;gap:20px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.stat{padding:20px 17px}.stat>span{font-size:11px;color:var(--muted)}.stat strong{display:block;font-size:27px;font-weight:550;line-height:1.9;white-space:nowrap;letter-spacing:-.8px}.stat strong span{font-size:11px;font-weight:400;letter-spacing:0;margin-left:4px}.stat small{font-size:9px;color:var(--muted)}.chart-card,.subjects-card{padding:23px}.muted{color:var(--muted);font-size:10px}.chart-legend{display:flex;gap:7px;align-items:center;color:var(--muted);font-size:10px;margin-top:19px}.chart-legend>span{width:7px;height:7px;border-radius:2px}.chart-legend small{margin-left:auto;font-size:9px}.chart{height:167px;display:flex;gap:12px;margin-top:17px;border-bottom:1px solid var(--line);background:repeating-linear-gradient(to top,transparent 0,transparent 39px,var(--line) 40px,transparent 41px);padding:0 4px}.bar-col{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;position:relative}.bar{width:65%;max-width:38px;border-radius:5px 5px 0 0;background:#abc1aa;min-height:3px}.bar-col.today .bar{background:var(--accent)}.bar-value{font-size:9px;color:var(--muted);margin-bottom:4px;white-space:nowrap}.bar-label{position:absolute;bottom:-25px;font-size:10px;color:var(--muted);white-space:nowrap}.bar-col.today .bar-label{color:var(--accent);font-weight:650}#chart-caption{margin:37px 0 0}.subjects-card ul{list-style:none;padding:0;margin:16px 0}.subjects-card li{display:flex;align-items:center;padding:11px 0;border-bottom:1px solid var(--line);gap:10px}.subject-dot{width:8px;height:8px;border-radius:3px;flex:none;background:var(--accent)}.subject-title{overflow-wrap:anywhere;font-size:12px}.subject-duration{margin-left:auto;white-space:nowrap;font-size:12px;font-variant-numeric:tabular-nums}.add-subject{display:flex;gap:8px}.add-subject input{flex:1;font-size:11px;padding:11px}.subjects-card>.hint{margin-bottom:0}footer{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:9px;margin:32px 0 25px}.footer-dot{color:var(--accent);font-size:7px;margin-right:5px}.notice{border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--soft);padding:12px 16px;border-radius:8px;font-size:12px;margin:0 0 20px;overflow-wrap:anywhere}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(min-width:1000px){.timer-card{min-height:686px}}@media(max-width:1000px){.app{padding:0 24px}.workspace{grid-template-columns:360px 1fr;gap:18px}.timer-card{padding:22px 22px 0}.stats{gap:7px}.stat{padding:16px 10px}.stat strong{font-size:22px}.stat small{font-size:8px}.chart-card,.subjects-card{padding:20px}}@media(max-width:760px){.app{max-width:540px;padding:0 20px}header{height:87px}.intro{padding:27px 0 23px}.date{font-size:10px;align-self:flex-start;margin-top:3px}h1{font-size:22px}.intro p:last-child{font-size:10px}.workspace{grid-template-columns:1fr}.timer-card{padding:22px 24px 0}.dial{max-width:260px;margin:24px auto 20px}.stats{gap:9px}.stat{padding:17px 12px}.stat strong{font-size:25px}.stat small{font-size:8px}.insights{gap:18px}footer{flex-direction:column;gap:5px;margin-top:25px}.brand{font-size:19px}.date{max-width:90px;text-align:right}.section-heading h2{font-size:13px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}