:root{color-scheme:light;--font-sans: "Inter", "SF Pro Text", system-ui, "Noto Sans SC", "Microsoft YaHei", sans-serif;--font-jp: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;--font-mono: "DM Mono", "SFMono-Regular", Consolas, monospace;--bg: #f3f6fb;--bg-tint: #e9f0f9;--surface: #ffffff;--surface-2: #f7f9fd;--surface-3: #eef3fa;--ink: #16233a;--ink-2: #3b4d67;--muted: #6b7f99;--line: #dfe7f2;--line-strong: #c9d6e8;--accent: #2f7cf6;--accent-strong: #1f66d8;--accent-soft: #e7f0ff;--accent-ink: #ffffff;--good: #1f9d6d;--good-soft: #e4f6ee;--bad: #d4493c;--bad-soft: #fdeceb;--warn: #b8741a;--warn-soft: #fdf2e2;--support: #b57e2a;--support-soft: #fdf4e4;--r-sm: 10px;--r-md: 14px;--r-lg: 20px;--r-xl: 28px;--r-pill: 999px;--shadow-1: 0 1px 2px rgba(22, 35, 58, .05), 0 6px 18px rgba(22, 35, 58, .05);--shadow-2: 0 2px 4px rgba(22, 35, 58, .04), 0 18px 44px rgba(22, 35, 58, .1);--ease: cubic-bezier(.2, .7, .25, 1);--sidebar: 304px;--tap: 44px;--ui-vh: calc(100dvh / var(--ui-scale, 1))}html.dark-theme{color-scheme:dark;--bg: #070b11;--bg-tint: #0a1119;--surface: #0e1722;--surface-2: #121e2b;--surface-3: #192737;--ink: #d7e2ef;--ink-2: #aebfd2;--muted: #7e92aa;--line: #1b2938;--line-strong: #293c50;--accent: #5d9bf0;--accent-strong: #82b6fb;--accent-soft: #142941;--accent-ink: #050d18;--good: #43c294;--good-soft: #0f2c24;--bad: #f07c6d;--bad-soft: #2f1a17;--warn: #d7a054;--warn-soft: #2a2112;--support: #e3b966;--support-soft: #2b2213;--shadow-1: 0 1px 2px rgba(0, 0, 0, .35), 0 6px 18px rgba(0, 0, 0, .35);--shadow-2: 0 2px 4px rgba(0, 0, 0, .4), 0 20px 48px rgba(0, 0, 0, .55)}html.dark-theme body{background:radial-gradient(900px 520px at 88% -8%,color-mix(in srgb,var(--accent) 6%,transparent),transparent 62%),radial-gradient(700px 480px at 2% 42%,color-mix(in srgb,var(--accent) 3%,transparent),transparent 60%),var(--bg)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}html,body,*{scrollbar-width:none;-ms-overflow-style:none}html::-webkit-scrollbar,body::-webkit-scrollbar,*::-webkit-scrollbar{width:0;height:0;display:none}body{margin:0;min-width:320px;min-height:var(--ui-vh);color:var(--ink);background:radial-gradient(900px 520px at 88% -8%,color-mix(in srgb,var(--accent) 9%,transparent),transparent 62%),radial-gradient(700px 480px at 2% 42%,color-mix(in srgb,var(--accent) 5%,transparent),transparent 60%),var(--bg);font-family:var(--font-sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;zoom:var(--ui-scale, 1)}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{font-weight:700;letter-spacing:-.02em;line-height:1.25}button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}input,select,textarea{font:inherit;color:inherit}a{color:var(--accent-strong)}[lang=ja]{font-family:var(--font-jp)}:where(button,a,input,select,summary):focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 34%,transparent);outline-offset:2px}:where(button):disabled{cursor:not-allowed;opacity:.5}:where(button,a){-webkit-tap-highlight-color:transparent}::selection{background:color-mix(in srgb,var(--accent) 24%,transparent)}.kicker{display:inline-block;color:var(--accent-strong);font:600 11px/1.4 var(--font-mono);letter-spacing:.14em;text-transform:uppercase}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 18px;border:1px solid transparent;border-radius:var(--r-md);font-size:14px;font-weight:650;white-space:nowrap;text-decoration:none;transition:background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease),box-shadow .16s var(--ease),transform .16s var(--ease)}.btn:active:not(:disabled){transform:scale(.985)}.btn-primary{color:var(--accent-ink);background:linear-gradient(135deg,var(--accent),var(--accent-strong));box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 26%,transparent)}.btn-primary:hover:not(:disabled){box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 34%,transparent);transform:translateY(-1px)}.btn-secondary{color:var(--ink);background:var(--surface);border-color:var(--line-strong)}.btn-secondary:hover:not(:disabled){border-color:var(--accent);color:var(--accent-strong)}.btn-ghost{color:var(--ink-2);background:var(--surface-2);border-color:transparent}.btn-ghost:hover:not(:disabled){background:var(--surface-3);color:var(--ink)}.btn-quiet{min-height:36px;padding:0 12px;color:var(--accent-strong);background:var(--accent-soft);font-size:13px}.btn-quiet:hover:not(:disabled){background:color-mix(in srgb,var(--accent) 18%,var(--surface))}.btn-sm{min-height:36px;padding:0 13px;font-size:13px;border-radius:var(--r-sm)}.btn-block{width:100%}.btn .btn-icon{flex:none}.icon-btn{display:inline-grid;place-items:center;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);color:var(--ink-2);transition:background-color .16s,border-color .16s,color .16s}.icon-btn:hover{border-color:var(--accent);color:var(--accent-strong);background:var(--accent-soft)}.back-link{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 12px 0 9px;margin-bottom:14px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);color:var(--ink-2);font-size:13px;font-weight:600;transition:border-color .16s,color .16s,background-color .16s}.back-link:hover{border-color:var(--accent);color:var(--accent-strong);background:var(--accent-soft)}.tag{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:var(--r-pill);background:var(--surface-3);color:var(--ink-2);font-size:11px;font-weight:600;white-space:nowrap}.tag-accent{background:var(--accent-soft);color:var(--accent-strong)}.tag-good{background:var(--good-soft);color:var(--good)}.tag-muted{background:transparent;border:1px solid var(--line);color:var(--muted)}.card{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}.progress{position:relative;height:6px;overflow:hidden;border-radius:var(--r-pill);background:color-mix(in srgb,var(--accent) 12%,var(--surface-3))}.progress>span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 72%,#ffffff),var(--accent-strong));transition:width .5s var(--ease)}.ring{position:relative;flex:none;width:148px;height:148px}.ring svg{width:100%;height:100%;transform:rotate(-90deg)}.ring-track{fill:none;stroke:var(--accent-soft);stroke-width:10}.ring-value{fill:none;stroke:var(--accent);stroke-width:10;stroke-linecap:round;transition:stroke-dashoffset .6s var(--ease)}.ring-center{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}.ring-center b{font-size:34px;line-height:1;letter-spacing:-.03em}.ring-center b small{font-size:14px;font-weight:600;color:var(--muted)}.ring-center span{font-size:11px;color:var(--muted)}.empty-state{display:flex;flex-direction:column;align-items:center;gap:10px;padding:64px 24px;border:1px dashed var(--line-strong);border-radius:var(--r-lg);text-align:center}.empty-state .empty-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:var(--accent-soft);color:var(--accent-strong)}.empty-state b{font-size:16px}.empty-state p{max-width:360px;color:var(--muted);font-size:13px}.app{min-height:var(--ui-vh)}.sidebar{position:fixed;inset:0 auto 0 0;z-index:20;display:flex;flex-direction:column;width:var(--sidebar);padding:22px 16px 18px;border-right:1px solid var(--line);background:color-mix(in srgb,var(--surface) 88%,transparent);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand{display:flex;align-items:center;gap:11px;padding:2px 8px 18px;text-align:left}.brand-mark{display:grid;place-items:center;width:38px;height:38px;flex:none;border-radius:12px;background:linear-gradient(140deg,var(--accent),var(--accent-strong));color:#fff;font:700 19px var(--font-jp);box-shadow:0 6px 16px color-mix(in srgb,var(--accent) 30%,transparent)}.brand-text strong{display:block;font-size:14px;letter-spacing:-.01em}.brand-text small{display:block;margin-top:2px;color:var(--muted);font-size:11px}.access-badge{display:inline-block;margin-left:6px;padding:1px 5px;border-radius:999px;background:var(--accent-soft);color:var(--accent-strong);font:600 9.5px var(--font-mono);letter-spacing:.04em;vertical-align:1px}.side-nav{display:flex;flex-direction:column;gap:4px}.nav-item{position:relative;display:flex;align-items:center;gap:11px;min-height:44px;padding:0 12px;border-radius:var(--r-md);color:var(--ink-2);font-size:13.5px;font-weight:550;text-align:left;transition:background-color .16s,color .16s}.nav-item:hover{background:var(--surface-2);color:var(--ink)}.nav-item.is-active{background:var(--accent-soft);color:var(--accent-strong);font-weight:650}.nav-icon{display:grid;place-items:center;width:22px;flex:none;color:var(--muted)}.nav-item.is-active .nav-icon{color:var(--accent-strong)}.nav-label{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav-badge{flex:none;padding:1px 7px;border-radius:var(--r-pill);background:var(--surface-3);color:var(--muted);font:600 11px var(--font-mono)}.nav-item.is-active .nav-badge{background:var(--surface);color:var(--accent-strong)}.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:18px}.side-support{display:flex;align-items:center;gap:6px;width:100%;min-height:36px;padding:0 10px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--surface);color:var(--ink-2);font-size:11.5px;font-weight:600;text-align:left;transition:color .16s,background-color .16s,border-color .16s,transform .16s}.side-support:hover{color:var(--support);border-color:color-mix(in srgb,var(--support) 45%,var(--line));background:var(--support-soft)}.side-support .heart{color:var(--support);font-size:12px;line-height:1}.side-support .support-arrow{margin-left:auto}.side-support:active,.footer-support:active,.settings-support:active{transform:scale(.985)}.side-overall{display:flex;align-items:center;gap:10px;padding:11px;border:1px solid color-mix(in srgb,var(--accent) 18%,var(--line));border-radius:var(--r-md);background:linear-gradient(160deg,color-mix(in srgb,var(--accent-soft) 58%,var(--surface)),var(--surface))}.side-overall .ring{width:72px;height:72px}.side-overall .ring-center{gap:1px}.side-overall .ring-center b{font-size:19px}.side-overall .ring-center b small{font-size:9px}.side-overall .ring-center span{font-size:8px}.side-overall-copy{min-width:0;display:flex;flex-direction:column;gap:2px}.side-overall-copy .kicker{font-size:9px;letter-spacing:.1em}.side-overall-copy b{overflow:hidden;font-size:11.5px;line-height:1.25;text-overflow:ellipsis;white-space:nowrap}.side-overall-copy>span{color:var(--muted);font-size:9.5px}.side-overall-copy small{color:var(--muted);font-size:8.5px;line-height:1.35}.side-overall-bar{margin-top:1px}.side-overall-bar .progress{height:4px}.side-account-card{display:flex;flex-direction:column;gap:10px;margin:0 0 18px;padding:12px;border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));border-radius:var(--r-md);background:linear-gradient(160deg,var(--accent-soft),var(--surface))}.side-account-head{display:flex;align-items:center;gap:9px;min-width:0}.side-account-icon{position:relative;display:grid;place-items:center;width:32px;height:32px;flex:none;border:1px solid color-mix(in srgb,var(--accent) 20%,var(--line));border-radius:50%;background:var(--surface);color:var(--accent-strong)}.side-account-card.is-connected .side-account-icon:after{content:"";position:absolute;right:0;bottom:0;width:8px;height:8px;border:2px solid var(--surface);border-radius:50%;background:var(--good)}.side-account-card.is-syncing .side-account-icon:after{background:var(--warn)}.side-account-card.is-error .side-account-icon:after{background:var(--bad)}.side-account-copy{min-width:0}.side-account-copy b{display:block;overflow:hidden;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.side-account-copy small{display:block;margin-top:2px;color:var(--muted);font-size:10.5px;line-height:1.5}.side-account-copy .side-account-status.syncing{color:var(--warn)}.side-account-copy .side-account-status.error{color:var(--bad)}.side-account-actions{display:flex;gap:6px}.side-account-actions .btn{flex:1;min-height:32px;padding:0 6px;border-radius:8px;font-size:11.5px}.status-dot{display:inline-block;width:6px;height:6px;margin-right:5px;border-radius:50%;background:var(--good);vertical-align:1px}.status-dot.idle{background:var(--muted)}.status-dot.syncing{background:var(--warn)}.status-dot.error{background:var(--bad)}.main{display:flex;flex-direction:column;min-height:var(--ui-vh);margin-left:var(--sidebar)}.content{width:100%;max-width:1120px;margin:0 auto;padding:36px 40px 88px}.content.is-wide{max-width:none;padding:0}.app.is-focus .sidebar{display:none}.app.is-focus .main{margin-left:0;height:var(--ui-vh);min-height:0;overflow:hidden}.page{animation:page-in .3s var(--ease) both}@keyframes page-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.page-header{margin-bottom:28px}.page-header-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}.page-header-copy h1{margin-top:6px;font-size:clamp(26px,3.2vw,34px)}.page-header-copy p{max-width:640px;margin-top:8px;color:var(--muted);font-size:14px;line-height:1.7}.page-header-aside{flex:none;display:flex;align-items:center;gap:10px}.disclosure{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}.disclosure+.disclosure{margin-top:12px}.disclosure-head{display:flex;align-items:center;gap:14px;width:100%;padding:16px 18px;text-align:left}.disclosure-copy{flex:1;min-width:0}.level-block .disclosure-copy{display:flex;align-items:center;gap:14px}.disclosure-meta{flex:none;display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px}.disclosure-chevron{flex:none;color:var(--muted);transition:transform .2s var(--ease)}.disclosure.is-open .disclosure-chevron{transform:rotate(180deg)}.disclosure-body{padding:0 18px 18px}.disclosure-body[hidden]{display:none}.home-dashboard{display:grid;grid-template-columns:1fr;gap:14px}.home-dashboard>.overall-card{display:none}.today-card{display:flex;flex-direction:column;gap:20px;padding:clamp(24px,3vw,38px);border:1px solid var(--line);border-radius:var(--r-xl);background:linear-gradient(120deg,color-mix(in srgb,var(--accent-soft) 72%,var(--surface)) 0%,var(--surface) 62%);box-shadow:var(--shadow-1)}.today-head{display:flex;flex-direction:column;align-items:flex-start;gap:6px}.today-title{font-size:clamp(24px,3vw,32px)}.today-desc{max-width:520px;margin-top:2px;color:var(--muted);font-size:14px;line-height:1.75}.today-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:auto}.today-stat{display:flex;flex-direction:column;gap:3px;padding:12px 14px;border:1px solid color-mix(in srgb,var(--accent) 14%,var(--line));border-radius:var(--r-md);background:color-mix(in srgb,var(--surface) 74%,transparent)}.today-stat b{font-size:22px;letter-spacing:-.02em}.today-stat b small{font-size:12px;color:var(--muted)}.today-stat span{color:var(--muted);font-size:11px}.today-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.today-actions .btn{min-height:42px}.overall-card{display:flex;align-items:center;gap:18px;padding:22px;border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-1)}.overall-ring .ring{width:118px;height:118px}.overall-ring .ring-center b{font-size:28px}.overall-ring .ring-center b small{font-size:12px}.overall-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}.overall-copy b{font-size:16px}.overall-copy small{color:var(--muted);font-size:11.5px}.overall-bar{margin-top:4px}.overall-bar .progress{height:5px}.home-modes{scroll-margin-top:24px}.section{margin-top:40px}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:16px;flex-wrap:wrap}.section-title{font-size:19px}.section-sub{margin-top:4px;color:var(--muted);font-size:13px}.section-link{display:inline-flex;align-items:center;gap:5px;color:var(--accent-strong);font-size:13px;font-weight:600}.section-link:hover{text-decoration:underline}.mode-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.mode-card{display:flex;flex-direction:column;gap:4px;padding:18px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);text-align:left;transition:transform .18s var(--ease),border-color .18s,box-shadow .18s}.mode-card:hover:not(:disabled){transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 45%,var(--line));box-shadow:var(--shadow-1)}.mode-icon{display:grid;place-items:center;width:40px;height:40px;margin-bottom:8px;border-radius:12px;background:var(--accent-soft);color:var(--accent-strong);font:700 19px var(--font-jp)}.mode-name{font-size:14.5px;font-weight:650}.mode-desc{color:var(--muted);font-size:12px;line-height:1.5}.mode-foot{display:flex;align-items:center;gap:10px;margin-top:12px}.mode-foot .progress{flex:1;height:4px}.mode-foot em{flex:none;color:var(--muted);font:500 11px var(--font-mono);font-style:normal}.resume-card{display:flex;align-items:center;gap:18px;padding:20px 22px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}.resume-badge{display:grid;place-items:center;width:52px;height:52px;flex:none;border-radius:var(--r-md);background:var(--accent-soft);color:var(--accent-strong);font:700 17px var(--font-mono)}.resume-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:5px}.resume-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:11.5px}.resume-title{font-size:17px}.resume-title span{color:var(--muted);font-size:13px;font-weight:500}.resume-goal{color:var(--muted);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.resume-progress{display:flex;align-items:center;gap:10px;margin-top:2px}.resume-progress .progress{flex:1;height:5px;max-width:260px}.resume-progress em{color:var(--muted);font:500 11px var(--font-mono);font-style:normal}.resume-card .btn{flex:none}.kana-entry{display:flex;align-items:center;gap:16px;width:100%;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);text-align:left}.kana-entry:hover{border-color:var(--accent)}.kana-entry-mark{display:grid;place-items:center;width:44px;height:44px;flex:none;border-radius:var(--r-md);background:var(--accent-soft);color:var(--accent-strong);font:700 21px var(--font-jp)}.kana-entry-copy{flex:1;min-width:0}.kana-entry-copy b{display:block;font-size:14.5px}.kana-entry-copy small{display:block;color:var(--muted);font-size:12px}.library{display:flex;flex-direction:column;gap:0}.library-total{flex:none;padding:8px 13px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);color:var(--accent-strong);font:600 12px var(--font-mono)}.library-progress{display:flex;align-items:center;gap:12px;margin-top:14px}.library-progress .progress{flex:1}.library-progress span{flex:none;color:var(--muted);font-size:11.5px}.library-progress b{color:var(--ink)}.level-block{margin-top:16px}.level-badge{display:grid;place-items:center;min-width:52px;height:38px;padding:0 10px;flex:none;border-radius:var(--r-sm);background:var(--accent-soft);color:var(--accent-strong);font:700 14px var(--font-mono)}.level-copy{flex:1;min-width:0}.level-copy b{display:block;font-size:15px}.level-copy small{display:block;color:var(--muted);font-size:11.5px}.level-progress{flex:none;display:flex;align-items:center;gap:10px;width:150px}.level-progress .progress{flex:1;height:5px}.level-progress em{color:var(--muted);font:500 11px var(--font-mono);font-style:normal}.unit-block{border-top:1px solid var(--line)}.unit-block:first-child{border-top:0}.unit-block.is-locked .unit-summary{opacity:.82}.unit-summary{display:flex;align-items:center;gap:10px;width:100%;padding:12px 4px;text-align:left}.unit-summary:hover .unit-title{color:var(--accent-strong)}.unit-index{flex:none;color:var(--muted);font:600 10.5px var(--font-mono);letter-spacing:.08em}.unit-title{flex:1;min-width:0;font-size:13.5px;font-weight:650;transition:color .16s}.unit-meta{flex:none;color:var(--muted);font-size:11px}.unit-state{flex:none;display:inline-flex;align-items:center;gap:4px;padding:2px 7px;border-radius:999px;background:var(--surface-2);color:var(--muted);font-size:10.5px;font-weight:650}.unit-state.is-locked{background:var(--bad-soft);color:var(--bad)}.unit-state.is-passed{background:var(--good-soft);color:var(--good)}.unit-state.is-mastery{background:var(--accent-soft);color:var(--accent-strong)}.unit-body{padding:0 0 10px}.unit-locked-note{display:flex;align-items:flex-start;gap:8px;margin:2px 0 10px;padding:10px 13px;border:1px dashed color-mix(in srgb,var(--bad) 28%,var(--line));border-radius:var(--r-md);background:color-mix(in srgb,var(--bad-soft) 55%,var(--surface));color:var(--ink-2);font-size:12px;line-height:1.6}.unit-locked-note svg{flex:none;margin-top:1px;color:var(--bad)}.unit-loading{margin:4px 0 10px;padding:10px 14px;border:1px dashed var(--line);border-radius:var(--r-md);color:var(--muted);font-size:12px}.lesson-row{display:flex;align-items:center;gap:16px;width:100%;padding:14px 16px;margin-bottom:8px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);text-align:left;transition:border-color .16s,box-shadow .16s,transform .16s}.lesson-row:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));box-shadow:var(--shadow-1);transform:translateY(-1px)}.lesson-no{display:grid;place-items:center;width:42px;height:42px;flex:none;border-radius:var(--r-sm);background:var(--surface-2);color:var(--ink-2);font:700 15px var(--font-mono)}.lesson-row.is-current .lesson-no{background:var(--accent-soft);color:var(--accent-strong)}.lesson-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.lesson-line{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}.lesson-line b{font-size:15px}.lesson-line small{color:var(--muted);font-size:11.5px}.lesson-goal{color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lesson-tags{display:flex;gap:6px;flex-wrap:wrap}.lesson-tags .tag{padding:2px 8px;font-size:10.5px}.lesson-side{flex:none;display:flex;align-items:center;gap:14px}.lesson-meter{display:flex;align-items:center;gap:8px;width:116px}.lesson-meter .progress{flex:1;height:4px}.lesson-meter em{color:var(--muted);font:500 10.5px var(--font-mono);font-style:normal}.lesson-go{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--surface-2);color:var(--muted);transition:background-color .16s,color .16s}.lesson-row:hover .lesson-go{background:var(--accent-soft);color:var(--accent-strong)}.lesson-row.is-done .lesson-go{background:var(--good-soft);color:var(--good)}.lesson-row.is-locked{opacity:.55;cursor:not-allowed}.lesson-row.is-locked:hover{border-color:var(--line);box-shadow:none;transform:none}.lesson-row.is-locked .lesson-go{background:var(--surface-2);color:var(--muted)}.course-note{margin-top:28px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-2);color:var(--muted);font-size:12px;line-height:1.75}.study{display:flex;flex-direction:column;height:var(--ui-vh);min-height:0}.study-head{flex:none;z-index:10;padding:14px clamp(20px,3vw,44px) 0;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 88%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.study-head-inner{width:min(100%,1080px);margin:0 auto}.study-bar{display:flex;align-items:center;gap:14px;min-height:44px}.study-bar .back-link{margin-bottom:0}.study-context{flex:1;min-width:0;display:flex;flex-direction:column;gap:1px}.study-context small{color:var(--muted);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase}.study-context b{overflow:hidden;font-size:14px;text-overflow:ellipsis;white-space:nowrap}.study-context b span{color:var(--muted);font-weight:500}.study-tools{flex:none;display:flex;align-items:center;gap:8px}.streak{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;border-radius:var(--r-pill);background:var(--accent-soft);color:var(--accent-strong);font-size:11.5px;font-weight:650}.streak small{color:var(--muted);font-size:10.5px;font-weight:500}.step-tabs{display:flex;gap:4px;margin:10px 0 0;padding-bottom:10px;overflow-x:auto;scrollbar-width:none}.step-tabs::-webkit-scrollbar{display:none}.step-tab{display:inline-flex;align-items:center;gap:7px;flex:1 1 0;min-width:max-content;padding:8px 12px;border-radius:var(--r-sm);color:var(--muted);font-size:12.5px;font-weight:550;white-space:nowrap;transition:background-color .16s,color .16s}.step-tab:hover{background:var(--surface-2);color:var(--ink)}.step-tab i{display:grid;place-items:center;width:19px;height:19px;flex:none;border-radius:50%;background:var(--surface-3);color:var(--muted);font:600 10px var(--font-mono);font-style:normal}.step-tab.is-done i{background:var(--good-soft);color:var(--good)}.step-tab.is-done i:after{content:"✓";font-size:10px}.step-tab.is-done i{font-size:0}.step-tab.is-active{background:var(--accent-soft);color:var(--accent-strong)}.step-tab.is-active i{background:var(--surface);color:var(--accent-strong)}.step-tab.is-active.is-done i{font-size:0}.study-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:none;padding:28px clamp(20px,3vw,44px) 56px}.study-scroll::-webkit-scrollbar{display:none}.study-inner{width:min(100%,1080px);margin:0 auto}.step-intro{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-bottom:20px;margin-bottom:22px;border-bottom:1px solid var(--line)}.step-intro-copy{flex:1;min-width:260px}.step-intro h2{margin-top:6px;font-size:clamp(22px,2.6vw,28px)}.step-intro p{max-width:720px;margin-top:8px;color:var(--muted);font-size:13.5px;line-height:1.8}.step-actions{flex:none;display:flex;align-items:center;gap:12px}.step-count{display:flex;flex-direction:column;align-items:flex-end;color:var(--muted);font-size:11px}.step-count b{color:var(--ink);font:700 15px var(--font-mono)}.study-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:14px}.study-grid.is-wide{grid-template-columns:repeat(auto-fill,minmax(min(100%,460px),1fr))}.study-card{display:flex;flex-direction:column;gap:8px;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}.study-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.study-card-top .icon-btn{width:32px;height:32px;flex:none;border-radius:var(--r-sm)}.vocab-word{font:700 23px/1.3 var(--font-jp)}.vocab-reading{display:flex;align-items:center;gap:9px;flex-wrap:wrap;color:var(--muted);font-size:12.5px}.vocab-romaji{color:var(--accent-strong);font:500 11.5px var(--font-mono)}.vocab-meaning{color:var(--ink-2);font-size:13px}.vocab-meaning em{margin-left:8px;color:var(--muted);font-size:11px;font-style:normal}.study-note{color:var(--muted);font-size:11.5px;line-height:1.7}.study-more{margin-top:2px}.study-more summary{display:inline-flex;align-items:center;gap:5px;color:var(--accent-strong);font-size:11.5px;cursor:pointer;list-style:none}.study-more summary::-webkit-details-marker{display:none}.study-more summary:after{content:"▾";font-size:9px;transition:transform .18s}.study-more[open] summary:after{transform:rotate(180deg)}.study-more .study-more-body{padding-top:8px}.grammar-pattern{font:700 17px/1.5 var(--font-jp)}.grammar-explain{color:var(--ink-2);font-size:13px;line-height:1.8}.grammar-tips{display:flex;flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;color:var(--muted);font-size:11.5px;line-height:1.7}.grammar-tips li:before{content:"· ";color:var(--accent-strong)}.grammar-examples{display:flex;flex-direction:column;gap:7px;padding-top:10px;border-top:1px dashed var(--line)}.grammar-example{display:flex;flex-direction:column;gap:2px}.grammar-example span{font-size:13.5px;line-height:1.6}.grammar-example small{color:var(--muted);font-size:11.5px}.basic-ja{font-size:16px;line-height:1.65}.basic-reading{color:var(--muted);font-size:11.5px}.basic-zh{color:var(--ink-2);font-size:12.5px}.basic-focus{align-self:flex-start}.usage-term{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}.usage-term b{font:700 16px var(--font-jp)}.usage-term span{color:var(--muted);font-size:11.5px}.usage-note{color:var(--ink-2);font-size:12.5px;line-height:1.8}.passage{display:flex;flex-direction:column;gap:14px}.passage-head{display:flex;flex-direction:column;gap:4px}.passage-head h3{font-size:19px}.passage-scene{color:var(--muted);font-size:12px}.passage-lines{display:flex;flex-direction:column;gap:10px}.passage-line{display:flex;gap:14px;padding:15px 52px 15px 18px;position:relative;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface)}.passage-speaker{flex:none;width:56px;padding-top:2px;color:var(--accent-strong);font-size:11.5px;font-weight:650}.passage-text{display:flex;flex-direction:column;gap:3px;min-width:0}.passage-text p{font-size:15.5px;line-height:1.7}.passage-text small{color:var(--muted);font-size:11.5px;line-height:1.6}.passage-reading{color:var(--accent-strong)!important}.passage-line .icon-btn{position:absolute;top:11px;right:11px;width:30px;height:30px;border-radius:var(--r-sm)}.study-cta{flex:none;z-index:5;padding:12px clamp(20px,3vw,44px) calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:color-mix(in srgb,var(--surface) 92%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.study-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;width:min(100%,1080px);margin:0 auto}.study-cta-inner.is-single{justify-content:flex-end}.study-cta-copy{display:flex;flex-direction:column;gap:2px}.study-cta-copy b{font-size:14px}.study-cta-copy small{color:var(--muted);font-size:11.5px}.practice{display:flex;flex-direction:column;height:var(--ui-vh);min-height:0}.practice-head{flex:none;z-index:10;padding:12px clamp(18px,3vw,40px) 0;background:color-mix(in srgb,var(--bg) 90%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.practice-head-inner{width:min(100%,820px);margin:0 auto}.practice-bar{display:flex;align-items:center;gap:12px;min-height:42px}.practice-bar .back-link{margin-bottom:0}.practice-title{flex:1;min-width:0;overflow:hidden;color:var(--muted);font-size:12px;text-overflow:ellipsis;white-space:nowrap}.practice-title b{color:var(--ink);font-weight:600}.practice-count{flex:none;color:var(--muted);font:600 12px var(--font-mono)}.practice-progress{padding:10px 0 12px}.practice-progress .progress{height:5px}.practice-scroll{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:none;padding:22px clamp(18px,3vw,40px) 40px}.practice-scroll::-webkit-scrollbar{display:none}.practice-inner{display:flex;flex-direction:column;width:min(100%,820px);min-height:100%;margin:0 auto}.practice-inner>.question,.practice-inner>.result{margin-top:auto;margin-bottom:auto}.question{padding:clamp(20px,3vw,30px);border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-1)}.question-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}.question-tags{display:flex;gap:7px;flex-wrap:wrap}.question-tools{display:flex;align-items:flex-start;gap:8px;margin-left:auto}.question-audio{display:flex;flex-direction:column;align-items:flex-end;gap:6px}.kana-shortcut{font-family:var(--font-jp);font-size:15px}.prompt-switch{display:inline-flex;padding:2px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface-2)}.prompt-switch button{padding:5px 11px;border-radius:var(--r-pill);color:var(--muted);font-size:11.5px;transition:background-color .16s,color .16s}.prompt-switch button.is-active{background:var(--surface);color:var(--accent-strong);font-weight:650;box-shadow:var(--shadow-1)}.prompt{color:var(--ink);font-size:clamp(21px,2.6vw,27px);font-weight:650;line-height:1.65;letter-spacing:-.01em;overflow-wrap:anywhere}.prompt.is-japanese{font-family:var(--font-jp);font-weight:500;letter-spacing:0}.prompt.is-glyph{padding:10px 0 4px;font-size:clamp(54px,11vw,78px);font-weight:500;line-height:1.15;letter-spacing:.04em;text-align:center}.prompt-hint{margin-top:8px;color:var(--muted);font-size:13px;line-height:1.65}.prompt-note{margin-top:8px;color:var(--muted);font-size:11.5px}.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:20px}.choices.is-binary{grid-template-columns:repeat(2,minmax(0,160px))}.choice{position:relative;display:flex;align-items:center;justify-content:center;min-height:56px;padding:12px 16px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-2);color:var(--ink);font-size:15.5px;text-align:center;transition:border-color .16s,background-color .16s,transform .16s,box-shadow .16s}.choice:hover:not(:disabled){border-color:color-mix(in srgb,var(--accent) 50%,var(--line));background:var(--accent-soft)}.choice.is-correct{border-color:var(--good);background:var(--good-soft);color:var(--good)}.choice.is-wrong{border-color:var(--bad);background:var(--bad-soft);color:var(--bad)}.choice-key{position:absolute;top:7px;left:8px;display:grid;place-items:center;min-width:20px;height:20px;padding:0 5px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--muted);font:600 10.5px var(--font-mono)}.answer-form{margin-top:20px}.answer-input{width:100%;min-height:58px;padding:13px 16px;border:1px solid var(--line-strong);border-radius:var(--r-md);background:var(--surface-2);color:var(--ink);caret-color:var(--accent-strong);font-family:var(--font-sans);font-size:19px;letter-spacing:.01em;transition:border-color .16s,box-shadow .16s,background-color .16s}.answer-input:focus{outline:none;border-color:var(--accent);background:var(--surface);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent)}.answer-input.is-correct{border-color:var(--good);box-shadow:0 0 0 3px color-mix(in srgb,var(--good) 16%,transparent)}.answer-input.is-wrong{border-color:var(--bad);box-shadow:0 0 0 3px color-mix(in srgb,var(--bad) 14%,transparent)}.feedback{display:flex;flex-direction:column;gap:4px;margin-top:18px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-2);animation:feedback-in .18s var(--ease) both}@keyframes feedback-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.feedback b{font-size:11px;letter-spacing:.08em}.feedback span{font-size:17px}.feedback .feedback-romaji{color:var(--accent-strong);font:500 12.5px var(--font-mono);font-style:normal}.feedback small{color:var(--muted);font-size:11.5px;line-height:1.7}.feedback.is-correct{border-color:color-mix(in srgb,var(--good) 38%,var(--line));background:var(--good-soft)}.feedback.is-correct b{color:var(--good)}.feedback.is-wrong{border-color:color-mix(in srgb,var(--bad) 38%,var(--line));background:var(--bad-soft)}.feedback.is-wrong b{color:var(--bad)}.practice-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;margin-top:18px}.practice-actions .btn-primary{min-width:148px}.result{width:min(100%,560px);margin:24px auto;padding:40px 28px;border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-1);text-align:center}.result-badge{display:grid;place-items:center;width:64px;height:64px;margin:0 auto 18px;border-radius:50%;background:var(--accent-soft);color:var(--accent-strong);font-size:28px}.result h1{font-size:24px}.result>p{margin-top:8px;color:var(--muted);font-size:13px;line-height:1.75}.result-stats{display:flex;justify-content:center;gap:40px;margin:24px 0 26px}.result-stats div{display:flex;flex-direction:column;gap:2px}.result-stats b{font-size:22px}.result-stats span{color:var(--muted);font-size:11px}.result-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.list{overflow:hidden;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}.list-row{display:flex;align-items:center;gap:16px;padding:15px 18px;border-top:1px solid var(--line)}.list-row:first-child{border-top:0}.list-row:hover{background:var(--surface-2)}.list-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}.list-copy b{font-size:13.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.list-copy small{color:var(--muted);font-size:11.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.list-row .btn{flex:none}.settings{display:flex;flex-direction:column;gap:10px}.settings-support{display:inline-flex;align-items:center;gap:4px;min-height:34px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);color:var(--ink-2);font-size:11.5px;font-weight:600;white-space:nowrap;transition:color .16s,background-color .16s,border-color .16s,transform .16s}.settings-support:hover{color:var(--support);border-color:color-mix(in srgb,var(--support) 45%,var(--line));background:var(--support-soft)}.settings-support .heart{color:var(--support);font-size:12px;line-height:1}.support-arrow{margin-left:1px;color:var(--muted);font-size:14px;line-height:1;transition:color .16s,transform .16s}.side-support:hover .support-arrow,.footer-support:hover .support-arrow,.settings-support:hover .support-arrow{color:var(--support);transform:translate(1px)}.setting-row{display:flex;align-items:center;gap:18px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface)}.setting-row-account{display:none;border-color:color-mix(in srgb,var(--accent) 22%,var(--line));background:linear-gradient(160deg,var(--accent-soft),var(--surface))}.setting-row-source{cursor:default}.setting-row-access{border-color:color-mix(in srgb,var(--accent) 34%,var(--line));background:linear-gradient(160deg,var(--accent-soft),var(--surface))}.setting-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.setting-copy b{font-size:13.5px}.setting-copy span{color:var(--muted);font-size:11.5px;line-height:1.6}.setting-control{flex:none;display:flex;align-items:center;gap:8px}.select{min-height:38px;padding:0 10px;border:1px solid var(--line-strong);border-radius:var(--r-sm);background:var(--surface-2);color:var(--ink);font-size:12.5px}.segmented{display:inline-flex;padding:3px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface-2)}.segmented button{padding:6px 12px;border-radius:var(--r-pill);color:var(--muted);font-size:12px}.segmented button.is-active{background:var(--surface);color:var(--accent-strong);font-weight:650;box-shadow:var(--shadow-1)}.toggle{position:relative;width:44px;height:26px;flex:none;border-radius:var(--r-pill);background:var(--line-strong);transition:background-color .18s}.toggle i{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0003;transition:transform .18s var(--ease)}.toggle.is-on{background:var(--accent)}.toggle.is-on i{transform:translate(18px)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;display:grid;place-items:center;padding:18px;background:color-mix(in srgb,var(--ink) 42%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.dialog{position:relative;width:min(100%,480px);max-height:calc(var(--ui-vh) - 36px);overflow-y:auto;padding:26px;border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-2);animation:dialog-in .2s var(--ease) both}@keyframes dialog-in{0%{opacity:0;transform:translateY(8px) scale(.985)}to{opacity:1;transform:none}}.dialog-close{position:absolute;top:14px;right:14px}.dialog h2{margin-top:6px;font-size:22px}.dialog>p{margin-top:6px;color:var(--muted);font-size:13px;line-height:1.7}.dialog-label{display:block;margin:18px 0 7px;color:var(--ink-2);font-size:12.5px;font-weight:650}.text-input{width:100%;height:46px;padding:0 13px;border:1px solid var(--line-strong);border-radius:var(--r-sm);background:var(--surface-2);color:var(--ink);font:600 17px var(--font-mono);letter-spacing:.1em}.text-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 14%,transparent)}.dialog-actions{display:flex;gap:9px;margin-top:12px}.dialog-actions>*{flex:1}.dialog-note{margin-top:12px;color:var(--accent-strong);font-size:12.5px;line-height:1.6;overflow-wrap:anywhere}.dialog-warning{display:block;margin-top:14px;color:var(--muted);font-size:11px;line-height:1.65}.account-current{display:flex;align-items:center;gap:10px;margin-top:16px;padding:11px 13px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-2)}.account-current span{color:var(--muted);font-size:11.5px}.account-current b{color:var(--accent-strong);font:700 16px var(--font-mono);letter-spacing:.08em}.account-current .btn{margin-left:auto}.account-sync{margin-top:9px;color:var(--muted);font-size:11.5px}.account-sync.error{color:var(--bad)}.account-sync.syncing{color:var(--warn)}.account-switch{display:block;margin:12px auto 0;color:var(--accent-strong);font-size:12px}.account-switch:hover{text-decoration:underline}.account-hint{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;padding:10px 12px;border:1px solid color-mix(in srgb,var(--accent) 18%,var(--line));border-radius:var(--r-sm);background:var(--accent-soft);color:var(--ink-2);font-size:12px;line-height:1.5}.account-hint button{flex:none;color:var(--accent-strong);font-size:12px;font-weight:650}.account-hint button:hover{text-decoration:underline}.logout{margin-top:16px;color:var(--bad);font-size:12px}.placement-overlay{z-index:70}.placement-dialog{width:min(100%,560px)}.placement-dialog h2{font-size:25px}.placement-options{display:grid;gap:9px;margin-top:18px}.placement-option{display:flex;align-items:center;gap:12px;width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);text-align:left;transition:border-color .16s,background-color .16s,transform .16s}.placement-option:hover{border-color:color-mix(in srgb,var(--accent) 42%,var(--line));transform:translateY(-1px)}.placement-option.is-active{border-color:var(--accent);background:var(--accent-soft)}.placement-radio{display:grid;place-items:center;width:24px;height:24px;flex:none;border:1px solid var(--line-strong);border-radius:50%;color:var(--accent-strong)}.placement-option.is-active .placement-radio{border-color:var(--accent);background:var(--surface)}.placement-copy{display:flex;flex-direction:column;gap:2px;min-width:0}.placement-copy b{font-size:14px}.placement-copy small{color:var(--muted);font-size:11.5px}.placement-detail{display:flex;align-items:flex-start;gap:8px;margin-top:12px;padding:11px 13px;border:1px dashed var(--line);border-radius:var(--r-md);background:var(--surface-2);color:var(--ink-2);font-size:12px;line-height:1.6}.placement-detail svg{flex:none;margin-top:1px;color:var(--accent-strong)}.access-dialog{width:min(100%,440px)}.result-locked-note{display:inline-flex;align-items:center;gap:6px;margin-top:10px;padding:7px 11px;border-radius:var(--r-pill);background:var(--bad-soft);color:var(--bad);font-size:11.5px;font-weight:600}.support-dialog{width:min(100%,460px);text-align:center;scrollbar-width:none}.support-dialog::-webkit-scrollbar{display:none}.support-dialog h2{font-size:24px}.support-qr{width:min(100%,380px);margin:18px auto 0;padding:10px 10px 9px;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--shadow-1)}.support-qr img{display:block;width:100%;height:auto}.support-dialog .support-hint{margin-top:10px;color:var(--muted);font-size:11.5px;line-height:1.6}.support-actions{display:flex;gap:9px;margin-top:14px}.support-actions>*{flex:1}.support-zoom{display:inline-block;margin-top:10px;color:var(--accent-strong);font-size:11.5px}.support-zoom:hover{text-decoration:underline}.support-dialog .dialog-warning{text-align:center}.kana-chart-card{margin:0;padding:clamp(16px,2.4vw,24px);border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}.kana-chart-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:16px}.kana-chart-heading h2{margin-top:5px;font-size:20px}.kana-chart-heading p{margin-top:3px;color:var(--muted);font-size:12px}.kana-chart-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;align-items:start}.kana-chart-section{min-width:0;padding:13px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface-2)}.kana-chart-section:first-child{grid-column:1 / -1}.kana-chart-section h3{margin-bottom:9px;color:var(--accent-strong);font-size:13px}.kana-table-wrap{width:100%;overflow-x:auto}.kana-table{width:100%;border-collapse:collapse;table-layout:fixed;text-align:center}.kana-table th,.kana-table td{height:46px;padding:3px 2px;border:1px solid var(--line)}.kana-table thead th{height:28px;background:var(--surface-3);color:var(--muted);font-size:10px;font-weight:650}.kana-table tbody th{width:46px;background:var(--surface-3);color:var(--muted);font-size:10px;font-weight:600}.kana-table td{background:var(--surface)}.kana-pair{display:flex;justify-content:center;gap:3px;color:var(--ink);font:500 16px/1.15 var(--font-jp)}.kana-table td small{display:block;margin-top:2px;color:var(--muted);font:9px var(--font-mono)}.kana-table-note{margin-top:8px;color:var(--muted);font-size:11px}.kana-chart-current{display:grid;justify-items:center;gap:3px;margin-bottom:14px;padding:12px 16px;border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));border-radius:var(--r-md);background:var(--accent-soft);text-align:center}.kana-chart-current small{color:var(--accent-strong);font-size:10.5px;font-weight:700;letter-spacing:.06em}.kana-chart-current strong{color:var(--ink);font:700 26px var(--font-jp)}.kana-chart-current span{color:var(--accent-strong);font-size:14px;font-weight:600;letter-spacing:.06em}.kana-chart-current p{color:var(--ink-2);font-size:13px}.kana-chart-credit{display:block;margin-top:12px;color:var(--muted);font-size:11px}.kana-chart-dialog{width:min(100%,1000px);max-height:calc(var(--ui-vh) - 32px);padding:0;overflow:hidden}.kana-chart-body{max-height:calc(var(--ui-vh) - 32px);overflow-y:auto;overscroll-behavior:contain;padding:22px;scrollbar-width:none}.kana-chart-body::-webkit-scrollbar{display:none}.kana-chart-close{z-index:2}.kana-chart-dialog .kana-chart-heading{padding-right:48px}.kana-table td.kana-current-match{background:var(--bad-soft);box-shadow:inset 0 0 0 2px var(--bad);border-radius:5px}.kana-table td.kana-current-match .kana-pair b,.kana-table td.kana-current-match small{color:var(--bad)}.kana-note-match{padding:1px 4px;border-radius:4px;background:var(--bad-soft);color:var(--bad);font-weight:750}.kana-mobile{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;display:flex;flex-direction:column;height:var(--ui-vh);padding:calc(10px + env(safe-area-inset-top)) 14px calc(12px + env(safe-area-inset-bottom));background:var(--bg);overflow:hidden}.kana-mobile-head{flex:none;display:flex;align-items:center;min-height:44px;margin-bottom:8px}.kana-mobile .kana-chart-card{flex:1;min-height:0;overflow-y:auto;scrollbar-width:none}.kana-mobile .kana-chart-card::-webkit-scrollbar{display:none}.pitch-accent-inline{display:inline-block;vertical-align:middle}.pitch-accent-missing{color:var(--muted);font-size:10px}.pitch-accent-variant{position:relative;display:inline-block;height:8px;margin:0 1px;vertical-align:middle}.pitch-accent-variant svg{display:block;height:8px;overflow:visible}.pitch-accent-variant svg path{stroke:var(--muted)}.pitch-accent-variant sup{position:absolute;top:-4px;right:-5px;color:var(--muted);font:600 7px var(--font-mono)}.loading{display:grid;place-items:center;min-height:var(--ui-vh);padding:24px;background:radial-gradient(720px 420px at 50% 30%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 60%),var(--bg)}.loading-panel{display:flex;flex-direction:column;align-items:center;gap:16px;width:min(100%,440px);padding:28px 30px 24px;border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-2);text-align:center}.loading-brand{display:flex;align-items:center;gap:10px;width:100%;padding-bottom:16px;border-bottom:1px solid var(--line);text-align:left}.loading-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:linear-gradient(140deg,var(--accent),var(--accent-strong));color:#fff;font:700 18px var(--font-jp)}.loading-brand b{display:block;font-size:13px}.loading-brand small{display:block;color:var(--muted);font-size:10.5px}.loading-orbit{display:grid;place-items:center;width:66px;height:66px;margin-top:4px;border:1px solid color-mix(in srgb,var(--accent) 26%,var(--line));border-radius:50%;background:var(--accent-soft);color:var(--accent-strong);font:32px var(--font-jp);animation:orbit 2.2s ease-in-out infinite}@keyframes orbit{50%{transform:scale(1.04);box-shadow:0 0 0 6px color-mix(in srgb,var(--accent) 8%,transparent)}}.loading-copy h1{margin-top:6px;font-size:21px}.loading-copy p{max-width:340px;margin-top:6px;color:var(--muted);font-size:12.5px;line-height:1.7;overflow-wrap:anywhere}.loading-bar{width:200px;height:4px;overflow:hidden;border-radius:var(--r-pill);background:var(--accent-soft)}.loading-bar span{display:block;width:40%;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--accent-strong));animation:loading-slide 1.4s ease-in-out infinite alternate}@keyframes loading-slide{to{transform:translate(150%)}}.loading-note{color:var(--muted);font-size:10.5px}.loading.is-error .loading-orbit{background:var(--bad-soft);color:var(--bad);border-color:var(--bad);animation:none}.footer{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:auto;padding:22px 40px;border-top:1px solid var(--line);color:var(--muted);font-size:11px}.footer-legal{color:inherit;text-decoration:underline;text-underline-offset:2px}.footer-legal:hover{color:var(--accent-strong)}.footer-support{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--surface);color:var(--ink-2);font-size:11.5px;font-weight:600;transition:color .16s,background-color .16s,border-color .16s,transform .16s}.footer-support:hover{color:var(--support);border-color:color-mix(in srgb,var(--support) 45%,var(--line));background:var(--support-soft)}.footer-support .heart{color:var(--support);font-size:12px;line-height:1}@media(max-width:1180px){:root{--sidebar: 264px}.content{padding:30px 30px 80px}.mode-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.side-overall{gap:8px;padding:9px}.side-overall .ring{width:66px;height:66px}.side-overall .ring-center b{font-size:17px}}@media(max-width:900px){.library-title-row{align-items:flex-start;flex-direction:column;gap:10px}.lesson-meter{display:none}}@media(max-width:780px){.sidebar{inset:auto 0 0 0;width:100%;height:calc(64px + env(safe-area-inset-bottom));flex-direction:row;align-items:stretch;justify-content:space-around;padding:4px 8px calc(4px + env(safe-area-inset-bottom));border:0;border-top:1px solid var(--line);background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:0 -6px 24px color-mix(in srgb,var(--ink) 8%,transparent)}.brand,.side-foot,.side-account-card{display:none}.setting-row-account{display:flex}.side-nav{flex-direction:row;justify-content:space-around;width:100%;gap:2px}.nav-item{flex-direction:column;justify-content:center;gap:2px;width:auto;flex:1;min-height:0;padding:4px 2px;border-radius:var(--r-sm);font-size:10.5px}.nav-icon{width:auto}.nav-label{flex:none}.nav-badge{position:absolute;top:2px;right:calc(50% - 22px);padding:0 5px;font-size:9px}.main{margin-left:0;min-height:var(--ui-vh);padding-bottom:calc(72px + env(safe-area-inset-bottom))}.content{padding:22px 16px 40px}.app.is-focus .main{padding-bottom:0}.page-header{margin-bottom:20px}.page-header-row{align-items:flex-start;flex-direction:column;gap:12px}.page-header-copy h1{font-size:24px}.settings-header .page-header-row{flex-direction:row;gap:12px}.settings-header .page-header-copy{flex:1;min-width:0}.settings-header .page-header-aside{margin-top:17px}.home-dashboard{grid-template-columns:1fr;gap:10px}.home-dashboard>.overall-card{display:flex}.today-card{padding:20px;gap:17px;border-radius:var(--r-lg)}.today-title{font-size:24px}.today-desc{font-size:13px;line-height:1.65}.today-stats{gap:6px}.today-stat{align-items:center;padding:10px 8px;text-align:center}.today-stat b{font-size:18px}.today-stat span{font-size:10px}.today-actions .btn{width:100%}.overall-card{flex-direction:row;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-radius:var(--r-lg)}.overall-ring{display:none}.overall-copy{gap:4px}.overall-copy b{font-size:15px}.overall-copy small{display:none}.overall-bar{margin-top:2px}.section{margin-top:30px}.resume-card{flex-wrap:wrap;padding:16px;gap:14px}.resume-body{flex-basis:calc(100% - 70px)}.resume-card .btn{width:100%}.resume-goal{white-space:normal}.level-progress{width:104px}.level-block .disclosure-head{display:grid;grid-template-columns:auto 1fr auto;gap:10px 12px;padding:14px}.level-block .disclosure-copy{display:contents}.level-block .level-copy{align-self:center}.level-block .disclosure-meta{grid-column:2 / 4;justify-content:flex-start}.level-block .disclosure-chevron{grid-column:3;grid-row:1}.lesson-row{gap:12px;padding:12px}.lesson-no{width:36px;height:36px;font-size:13px}.lesson-side{gap:8px}.lesson-go{width:28px;height:28px}.unit-meta{display:none}.unit-state{padding:2px 6px;font-size:9.5px}.unit-gate{margin-top:8px}.study-head{padding:10px 16px 0}.study-context small{display:none}.study-context b{font-size:13px}.study-tools .streak{padding:4px 8px}.step-tabs{gap:2px}.step-tab{flex:1;flex-direction:column;gap:3px;padding:6px 2px;font-size:10px}.step-tab>span{width:100%;overflow:hidden;text-align:center;text-overflow:ellipsis}.study-scroll{padding:20px 16px calc(28px + env(safe-area-inset-bottom))}.step-intro{gap:14px;padding-bottom:16px;margin-bottom:16px}.step-intro h2{font-size:22px}.study-grid,.study-grid.is-wide{grid-template-columns:1fr;gap:10px}.study-card{padding:15px 16px}.study-cta{padding:10px 16px calc(10px + env(safe-area-inset-bottom))}.study-cta-inner{gap:10px}.study-cta-copy{display:none}.study-cta .btn{width:100%}.practice-head{padding:8px 14px 0}.practice-title{display:none}.practice-scroll{padding:16px 14px calc(20px + env(safe-area-inset-bottom))}.question{padding:18px 16px;border-radius:var(--r-lg)}.choices{grid-template-columns:1fr}.choices.is-binary{grid-template-columns:repeat(2,1fr)}.choice-key{display:none}.prompt{font-size:21px}.practice.has-keyboard .practice-actions .btn-primary,.key-hint{display:none}.practice-actions{display:flex;gap:10px;padding-top:4px}.practice-actions .btn-primary{flex:1;min-width:0}.result{padding:30px 20px;margin:12px auto}.setting-row{flex-wrap:wrap;gap:12px}.setting-control{width:100%;justify-content:flex-end}.list-row{flex-wrap:wrap}.list-row .btn{width:100%}.kana-chart-grid{grid-template-columns:1fr}.kana-chart-section:first-child{grid-column:auto}.kana-chart-card{padding:14px}.kana-chart-dialog{padding:0}.kana-chart-body{padding:16px}.footer{padding:18px 16px}}@media(max-width:520px){.mode-grid{grid-template-columns:1fr}.mode-card{flex-direction:row;align-items:center;gap:12px;padding:14px}.mode-icon{margin:0;width:38px;height:38px}.mode-card>.mode-desc{display:none}.mode-foot{margin:0 0 0 auto;width:96px}.mode-foot em{display:none}.today-stat b{font-size:17px}.today-stat b small{font-size:11px}.level-copy small{font-size:10.5px}.level-progress{width:84px}.level-badge{min-width:44px;height:34px}.unit-meta,.lesson-goal{display:none}.dialog{padding:22px 18px}.dialog-actions{flex-direction:column}.account-current{flex-wrap:wrap}.account-current .btn{width:100%;margin-left:0}.step-count{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}.virtual-keyboard{flex:none;z-index:5;padding:8px 8px calc(8px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:color-mix(in srgb,var(--surface) 96%,transparent);box-shadow:0 -8px 28px color-mix(in srgb,var(--ink) 10%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.virtual-key-grid{display:grid;gap:5px;width:min(100%,560px);margin:0 auto}.virtual-key-row{display:flex;justify-content:center;gap:4px}.virtual-key-row button{flex:1 1 0;min-width:0;height:42px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:600 15px var(--font-mono);box-shadow:0 1px 2px color-mix(in srgb,var(--ink) 6%,transparent);touch-action:manipulation}.virtual-key-row button:active{background:var(--accent-soft)}.virtual-key-row-middle{padding:0 4%}.virtual-key-row-bottom{padding:0 1%}.virtual-key-row .virtual-backspace{flex:1.4 1 0;background:var(--surface-3);font-size:18px}.virtual-key-bottom{display:flex;justify-content:flex-end;width:min(100%,560px);margin:6px auto 0}.virtual-key-bottom .virtual-submit{width:42%;min-width:132px;height:40px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:var(--accent-ink);font-size:12.5px;font-weight:650}@media(min-width:781px){.virtual-keyboard{display:none}}.unit-exams{margin:18px 0 4px;padding-top:16px;border-top:1px dashed var(--line-strong)}.unit-exams-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:10px}.unit-exams-head b{font-size:14px;color:var(--ink)}.unit-exams-head small{display:block;margin-top:3px;font-size:12px;color:var(--muted)}.unit-gate{flex:none;display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted);font-size:10.5px;font-weight:650}.unit-gate.is-pass{background:var(--good-soft);color:var(--good)}.unit-gate.is-mastery{background:var(--accent-soft);color:var(--accent-strong)}.unit-exam-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.exam-card{display:grid;gap:6px;padding:12px 13px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-align:left;color:var(--ink);transition:border-color .15s ease,transform .15s ease,box-shadow .15s ease}.exam-card:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px);box-shadow:0 8px 22px color-mix(in srgb,var(--ink) 8%,transparent)}.exam-card.is-passed{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));background:color-mix(in srgb,var(--accent-soft) 55%,var(--surface))}.exam-card.is-challenge:not(.is-passed){border-style:dashed}.exam-card.is-locked{opacity:.55;cursor:not-allowed}.exam-card-top{display:flex;align-items:center;justify-content:space-between;gap:8px}.exam-card-top b{font-size:13.5px}.exam-card small{color:var(--muted);font-size:11.5px}.exam-card-score{color:var(--ink-2);font-size:12px;font-weight:600}.exam-inner{max-width:860px}.exam-intro{padding:8px 0 18px}.exam-intro h1{margin:6px 0 8px;font-size:clamp(24px,4vw,34px)}.exam-intro p{color:var(--muted);line-height:1.75;font-size:13.5px}.exam-clock{display:inline-flex;align-items:center;gap:5px;padding:4px 9px;border-radius:999px;background:var(--surface-3);color:var(--ink-2);font:600 12px var(--font-mono)}.exam-clock.is-low{background:#ffecec;color:#b22828}.exam-best{color:var(--muted);font-size:12px}.exam-progress{display:flex;align-items:center;gap:10px;padding:0 0 8px;color:var(--muted);font-size:12px}.exam-progress-track{flex:1;height:4px;border-radius:999px;background:var(--surface-3);overflow:hidden}.exam-progress-track i{display:block;height:100%;border-radius:inherit;background:var(--accent);transition:width .2s ease}.exam-section{padding:8px 0 20px}.exam-section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:12px 0 10px;border-bottom:2px solid var(--ink);margin-bottom:14px}.exam-section-head h2{margin:0;font-size:20px}.exam-section-head span{color:var(--muted);font-size:12px}.exam-passage{margin:14px 0;padding:14px 16px;border-left:3px solid var(--accent);border-radius:0 10px 10px 0;background:var(--surface-2)}.exam-passage b{display:block;margin-bottom:8px;font-size:13px;color:var(--ink-2)}.exam-passage p{margin:4px 0;line-height:1.9;font-size:14px}.exam-question{padding:14px 16px;margin:10px 0;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.exam-question-head{display:flex;align-items:center;gap:8px;margin-bottom:6px}.exam-question-no{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:7px;background:var(--accent-soft);color:var(--accent-strong);font:700 12px var(--font-mono)}.exam-question-kind{color:var(--muted);font-size:11px}.exam-question-prompt{margin:2px 0 4px;line-height:1.8;font-size:14.5px}.exam-question-zh{margin:0 0 6px;color:var(--ink-2);font-size:13px;line-height:1.7}.exam-question-note{margin:0 0 8px;padding:7px 10px;border-radius:8px;background:var(--accent-soft);color:var(--ink-2);font-size:12px;line-height:1.65}.exam-question-hint{display:block;color:var(--muted);font-size:12px;margin-bottom:8px}.exam-choices{display:grid;gap:6px;margin:10px 0;padding:0;list-style:none}.exam-choices li{display:flex;gap:9px;align-items:baseline;padding:7px 10px;border-radius:8px;background:var(--surface-2);font-size:14px}.exam-choices li span{flex:none;display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--surface-3);color:var(--ink-2);font:700 11px var(--font-mono)}.exam-input{width:100%;margin-top:8px}.exam-submit{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 0 36px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.exam-result{padding:10px 0 30px}.exam-score{display:grid;justify-items:center;gap:6px;padding:30px 20px;border-radius:18px;background:var(--surface-2);border:1px solid var(--line)}.exam-score b{font-size:58px;line-height:1;letter-spacing:-.04em}.exam-score>span{color:var(--muted);font-size:13px}.exam-score em{font-style:normal;font-weight:700;font-size:14px}.exam-score.is-pass em{color:#1f7a4d}.exam-score.is-fail em{color:#b22828}.exam-result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}.exam-result-grid>div{display:grid;gap:3px;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}.exam-result-grid span{color:var(--muted);font-size:12px}.exam-result-grid b{font-size:18px}.exam-result-grid small{color:var(--muted);font-size:11px}.exam-result-note{color:var(--muted);font-size:13px;line-height:1.7}.exam-review section{margin-top:22px}.exam-review h2{font-size:18px;margin:0 0 10px}.exam-review h2 small{color:var(--muted);font-size:12px;font-weight:400}.exam-review-item{padding:12px 14px;margin:8px 0;border:1px solid var(--line);border-left-width:4px;border-radius:10px;background:var(--surface)}.exam-review-item.is-ok{border-left-color:#3aa675}.exam-review-item.is-bad{border-left-color:#d14b4b}.exam-review-head{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:12px}.exam-review-head b{color:var(--ink)}.exam-review-item p{margin:6px 0;line-height:1.75;font-size:14px}.exam-review-item small{display:block;color:var(--muted);font-size:12px;margin-top:3px}.exam-review-explain{color:var(--ink-2)!important}@media(max-width:780px){.unit-exam-grid{grid-template-columns:1fr}.unit-exams-head{display:block}.unit-exams-head small{display:block;margin-top:4px}.exam-best{display:none}.exam-result-grid{grid-template-columns:1fr}.exam-submit{flex-direction:column;align-items:stretch}.exam-submit .btn{width:100%}}.dialog-status{text-align:center}.dialog-status .loading-bar{width:min(100%,220px);margin:14px auto 10px}.dialog-status p{color:var(--muted);font-size:12.5px}