/* Kanagawa Wave, matching katakana. Dark-only, including native form controls. */
:root{color-scheme:dark;--paper:#1f1f28;--card:#2a2a37;--ink:#dcd7ba;--muted:#c8c093;--line:#54546d;--accent:#ffa066;--green:#98bb6c;font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;background:transparent;border:1px solid var(--line);border-radius:8px;padding:12px 18px;transition:background .15s,transform .15s}button:hover{background:#363646}button:active{transform:translateY(1px)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #7fb4ca;outline-offset:4px}a{color:inherit}header{max-width:1120px;margin:auto;padding:30px 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{text-decoration:none;display:flex;align-items:center;gap:12px;font-size:28px;letter-spacing:-1px;font-weight:650}.seal{display:grid;place-items:center;width:44px;height:48px;background:var(--accent);color:#1f1f28;border-radius:5px;font-family:serif;font-size:31px;transform:rotate(-4deg)}.brand-sub{display:block;font-size:8px;font-weight:600;letter-spacing:1.5px;margin-top:3px}nav{display:flex;gap:7px}nav button{border:0;font-size:13px;padding:10px 14px}nav .active{background:var(--ink);color:var(--paper)}main{max-width:960px;margin:0 auto;padding:54px 32px 60px;min-height:calc(100svh - 204px)}h1,h2,p{margin-top:0}h1{font-family:Georgia,serif;font-size:clamp(38px,6vw,61px);font-weight:400;line-height:1.12;letter-spacing:-1.8px;margin-bottom:18px}h2{font-size:23px;letter-spacing:-.6px;font-weight:550}.eyebrow{color:var(--accent);font-size:10px;font-weight:700;letter-spacing:2px;text-transform:uppercase;margin-bottom:18px}.muted,.hint{color:var(--muted)}.intro{font-size:15px;line-height:1.8;max-width:460px}.hero{display:grid;grid-template-columns:1fr 220px;gap:28px;align-items:center;margin-bottom:42px}.art{height:210px;position:relative;border:1px solid var(--line);border-radius:50%;display:flex;justify-content:center;align-items:center;font-family:serif;font-size:80px;letter-spacing:8px;color:var(--green);background:radial-gradient(circle at 75% 25%,#223249 0 16%,transparent 16.5%)}.art:after{content:'ひとつずつ';position:absolute;right:13px;bottom:0;font-size:12px;letter-spacing:4px;background:var(--paper);padding:12px}.stats{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:30px 0}.stat{padding:22px 18px;border-right:1px solid var(--line)}.stat:first-child{padding-left:0}.stat:last-child{border:0}.stat strong{display:block;font-family:Georgia,serif;font-size:36px;font-weight:400;margin-bottom:5px}.stat span{font-size:12px;color:var(--muted)}.primary{background:var(--green);border-color:var(--green);color:#1f1f28;padding:16px 27px;font-weight:550}.primary:hover{background:#a3d4d5}.start-row{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.hint{font-size:12px;line-height:1.7}.progress-section{margin-top:50px;display:grid;grid-template-columns:1fr 1fr;gap:46px}.section-label{font-size:11px;text-transform:uppercase;letter-spacing:1.5px;display:flex;justify-content:space-between;margin-bottom:14px}.track{height:5px;background:var(--line);border-radius:6px;overflow:hidden;margin-bottom:12px}.fill{height:100%;background:var(--green)}.activity{display:flex;gap:5px;margin-bottom:12px}.day{flex:1;height:29px;background:#363646;border-radius:3px}.day.done{background:var(--green)}.study-top{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:24px;font-size:12px}.study-top button{padding:8px 12px}.card{border:1px solid var(--line);background:var(--card);border-radius:16px;padding:40px 44px;text-align:center;box-shadow:0 8px 26px #16161d55}.card-meta{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:var(--muted);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:34px}.badge{color:var(--green);border:1px solid #76946a;border-radius:20px;padding:5px 9px;font-size:9px}.word{font-family:'Noto Sans JP','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif;font-weight:500;font-size:clamp(52px,10vw,84px);line-height:1.65;letter-spacing:3px;margin-bottom:14px;overflow-wrap:anywhere}.word rt{font-size:20px;font-weight:400;letter-spacing:1px;color:var(--green)}[lang=ja]{font-family:'Noto Sans JP','Hiragino Kaku Gothic ProN','Yu Gothic',sans-serif}.sentence{font-size:clamp(19px,3vw,25px);line-height:2.2;overflow-wrap:anywhere}.sentence b{color:var(--accent);font-weight:600}.sentence rt{font-size:12px}.meaning{font-size:22px;margin-bottom:22px;line-height:1.5}.translation{font-size:14px;line-height:1.7;color:var(--muted)}.answer-extra{border-top:1px solid var(--line);padding-top:24px;margin-top:24px}.audio-row{display:flex;justify-content:center;gap:10px;margin:18px 0}.audio-row button{font-size:12px;padding:9px 14px}.picture{max-height:145px;max-width:100%;object-fit:contain;margin:14px auto;display:block;mix-blend-mode:normal}.notes{font-size:13px;line-height:1.75;color:var(--muted);text-align:left;white-space:pre-line;max-width:580px;margin:22px auto 0}.pitch{font-size:23px;margin:15px}.reveal{width:100%;margin-top:24px}.prompt{font-size:12px;margin:22px 0 0;color:var(--muted)}.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:22px}.grade{background:var(--card);padding:14px 5px;line-height:1.5}.grade strong{display:block;font-size:14px;font-weight:600}.grade span{display:block;font-size:11px;opacity:.75}.grade[data-rating="1"]{color:#e46876}.grade[data-rating="3"]{background:var(--green);border-color:var(--green);color:var(--paper)}.keyboard{text-align:center;margin-top:18px;font-size:11px;color:var(--muted)}.settings{max-width:620px}.setting{padding:20px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.setting label{font-size:14px}.setting small{display:block;color:var(--muted);font-size:12px;line-height:1.6;margin-top:5px}.setting input[type=number]{width:80px;padding:10px;border:1px solid var(--line);background:var(--card);border-radius:7px;color:inherit}.setting input[type=checkbox]{width:20px;height:20px;accent-color:var(--green)}.settings .primary{margin-top:24px}.callout{background:#223249;border:1px solid #54546d;border-radius:10px;padding:20px;margin:28px 0;font-size:13px;line-height:1.8}.links{display:flex;gap:20px;font-size:12px;flex-wrap:wrap}.search{width:100%;padding:16px 20px;border:1px solid var(--line);border-radius:9px;background:var(--card);color:inherit;margin:10px 0 20px}.word-row{width:100%;display:grid;grid-template-columns:40px 1fr 1fr 90px;align-items:center;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:15px 4px;gap:15px}.word-row .jp{font-size:22px}.word-row small{color:var(--muted);font-size:11px}.word-row .def{font-size:13px;line-height:1.5}.word-row .status{text-align:right;font-size:10px;color:var(--muted)}footer{max-width:1120px;margin:auto;border-top:1px solid var(--line);display:flex;justify-content:space-between;padding:24px 32px;font-size:10px;color:var(--muted);gap:20px}footer a{text-decoration:none}#message{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:5;background:#363646;color:var(--ink);padding:14px 24px;border-radius:8px;max-width:90vw;font-size:13px;box-shadow:0 8px 20px #0002}#message:empty{display:none}.empty{text-align:center;padding:50px 0}.empty .seal{margin:0 auto 25px}.browse-detail{margin-top:24px}pre{white-space:pre-wrap;word-break:break-word;font-size:11px}details{margin:20px 0;font-size:12px}summary{cursor:pointer}@media(max-width:620px){header{padding:20px 18px}.brand{font-size:23px}.brand-sub{display:none}.seal{width:36px;height:40px;font-size:26px}nav{gap:0}nav button{font-size:12px;padding:9px 11px}main{padding:32px 20px 40px}.hero{grid-template-columns:1fr;margin-bottom:22px}.art{display:none}h1{font-size:43px}.stats{margin:24px 0}.stat{padding:18px 12px}.stat strong{font-size:31px}.start-row .primary{width:100%}.start-row{gap:12px}.progress-section{grid-template-columns:1fr;gap:27px;margin-top:36px}.card{padding:24px 19px}.card-meta{margin-bottom:24px}.grades{gap:7px}.grade{padding:14px 3px;min-height:72px}.keyboard{font-size:10px}.word-row{grid-template-columns:24px 1fr 1fr;gap:10px}.word-row .status{display:none}footer{padding:20px;line-height:1.6;flex-direction:column;gap:8px}.study-top{font-size:10px}.setting{gap:16px}}
@media(max-width:620px){.grades{grid-template-columns:repeat(2,1fr);position:sticky;bottom:0;background:var(--paper);padding:12px 0 max(12px,env(safe-area-inset-bottom));z-index:2;margin-bottom:0}.grade{min-height:62px;display:flex;align-items:center;justify-content:space-between;padding:13px 20px}.grade strong{font-size:15px}.grade span{font-size:13px}.reveal{position:sticky;bottom:max(12px,env(safe-area-inset-bottom));min-height:58px;box-shadow:0 0 0 10px var(--paper)}.audio-row button{min-height:46px;padding:12px 18px}.study-top button{min-height:44px}.word-row{min-height:76px}.setting input[type=checkbox]{width:28px;height:28px}.search{font-size:16px}.setting input[type=number]{font-size:16px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

::selection{background:#2d4f67;color:#dcd7ba}.grade:hover{background:#363646}.grade[data-rating="3"]:hover{background:#a3d4d5}.grade[data-rating="2"]{color:#e6c384}.grade[data-rating="4"]{color:#7fb4ca}