@font-face{font-family:OpenSans;src:url(/app/assets/OpenSans-Regular-CAAhnbWM.ttf) format("truetype");font-weight:400;font-display:swap}@font-face{font-family:OpenSans;src:url(/app/assets/OpenSans-Semibold-bUkok9fQ.ttf) format("truetype");font-weight:600;font-display:swap}:root{--font-ui: "OpenSans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-ja: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, "Noto Sans CJK JP", sans-serif;--fs-xs: 12px;--fs-sm: 14px;--fs-md: 16px;--fs-lg: 18px;--fs-xl: 20px;--fs-2xl: 24px;--fs-3xl: 32px;--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 22px;--sp-6: 28px;--r-sm: 10px;--r-md: 14px;--r-lg: 18px;--r-xl: 24px;--r-pill: 999px;--touch: 44px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--primary: #512bd4;--primary-hover: #4020ae;--primary-soft: #dfd8f7;--bg: #faf9f3;--surface: #ffffff;--surface-2: #f0f6fc;--stroke: #dcddd8;--stroke-strong: #c9cac4;--text: #171717;--text-muted: #657c8d;--text-faint: #6d6d6d;--accent: #2563eb;--accent-title: #1e3a8a;--accent-soft: #bfdbfe;--warn: #f59e0b;--warn-stroke: #b45309;--tile-words: #ffe9a8;--tile-kanji: #e7ccef;--tile-alpha: #a8e6e6;--tile-listen: #ffc2a8;--tile-dict: #b8d4f0;--tile-repeat: #b8e6b8;--rate-again: #f291a0;--rate-hard: #f7c87a;--rate-good: #9ce887;--rate-easy: #8fc9ff;--rate-text: #171717;--kana: #cc9900;--onyomi: #2b5bd7;--kunyomi: #963c00;--ink: #2563eb;--ink-error: #dc2626;--ok: #2e9e5b;--ok-soft: #c9f3d0;--attention-soft: #ffe2a8;--viz-new: #2563eb;--viz-learn: #f59e0b;--viz-know: #2e9e5b;--viz-grid: #e6e7e3;--shadow: 0 1px 2px rgb(0 0 0 / 5%);--shadow-raised: 0 12px 32px rgb(35 32 24 / 10%);color-scheme:light}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #191a1d;--surface: #282a2e;--surface-2: #32363e;--stroke: #4a4d54;--stroke-strong: #4a4f58;--text: #f6f7f8;--text-muted: #82a5c0;--text-faint: #b8b8be;--accent: #83a9e7;--accent-title: #83a9e7;--accent-soft: #2b3a55;--warn: #92400e;--warn-stroke: #fbbf24;--tile-words: #3b3424;--tile-kanji: #36293d;--tile-alpha: #22393b;--tile-listen: #3e2c25;--tile-dict: #263344;--tile-repeat: #25392a;--rate-again: #9e5f69;--rate-hard: #b07a2a;--rate-good: #669858;--rate-easy: #3c78b5;--rate-text: #f6f7f8;--kana: #e8c060;--onyomi: #8bb8d4;--kunyomi: #e8a050;--ink: #83a9e7;--ink-error: #f07070;--ok: #3fa76a;--ok-soft: #315e3e;--attention-soft: #70552b;--viz-new: #5b8fea;--viz-learn: #bd8228;--viz-know: #3fa374;--viz-grid: #3a3d44;--shadow: none;--shadow-raised: 0 16px 36px rgb(0 0 0 / 28%);color-scheme:dark}}:root[data-theme=dark]{--bg: #191a1d;--surface: #282a2e;--surface-2: #32363e;--stroke: #4a4d54;--stroke-strong: #4a4f58;--text: #f6f7f8;--text-muted: #82a5c0;--text-faint: #b8b8be;--accent: #83a9e7;--accent-title: #83a9e7;--accent-soft: #2b3a55;--warn: #92400e;--warn-stroke: #fbbf24;--tile-words: #3b3424;--tile-kanji: #36293d;--tile-alpha: #22393b;--tile-listen: #3e2c25;--tile-dict: #263344;--tile-repeat: #25392a;--rate-again: #9e5f69;--rate-hard: #b07a2a;--rate-good: #669858;--rate-easy: #3c78b5;--rate-text: #f6f7f8;--kana: #e8c060;--onyomi: #8bb8d4;--kunyomi: #e8a050;--ink: #83a9e7;--ink-error: #f07070;--ok: #3fa76a;--ok-soft: #315e3e;--attention-soft: #70552b;--viz-new: #5b8fea;--viz-learn: #bd8228;--viz-know: #3fa374;--viz-grid: #3a3d44;--shadow: none;--shadow-raised: 0 16px 36px rgb(0 0 0 / 28%);color-scheme:dark}*{box-sizing:border-box}:root{--preview-toolbar-height: 56px}:root[data-preview-toolbar=hidden]{--preview-toolbar-height: 0px}html{min-width:320px;background:var(--bg);color:var(--text);font-family:var(--font-ui)}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg)}button,input,select{color:inherit;font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit}[lang=ja]{font-family:var(--font-ja);font-variant-east-asian:proportional-width}ruby rt{color:var(--kana);font-size:.34em;font-weight:500}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}::selection{background:var(--primary-soft)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:8px;left:8px;z-index:100;padding:10px 14px;border-radius:var(--r-sm);background:var(--text);color:var(--bg);transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}.icon{width:24px;height:24px;flex:none}.pwa-install-banner{position:fixed;right:12px;bottom:calc(80px + var(--safe-bottom));left:12px;z-index:80;width:min(calc(100% - 24px),480px);margin-left:auto;padding:12px 14px;border:1px solid var(--stroke);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-raised);display:flex;align-items:flex-start;gap:12px}.pwa-install-banner__icon{width:48px;height:48px;border-radius:12px;flex:none}.pwa-install-banner__body{min-width:0;display:grid;gap:5px}.pwa-install-banner__body>b{font-size:15px}.pwa-install-banner__body>p,.pwa-install-steps{margin:0;color:var(--text-muted);font-size:12px;line-height:1.45}.pwa-install-steps{padding-left:20px}.pwa-install-banner__actions{margin-top:3px;display:flex;flex-wrap:wrap;gap:6px}.pwa-update-toast,.pwa-offline-toast{position:fixed;z-index:85;border:1px solid var(--stroke);background:var(--surface);box-shadow:var(--shadow-raised)}.pwa-update-toast{top:calc(10px + var(--safe-top));right:10px;left:10px;min-height:58px;padding:8px 8px 8px 13px;border-radius:var(--r-md);display:flex;align-items:center;gap:9px}.pwa-update-toast>span{min-width:0;flex:1;display:grid;gap:2px}.pwa-update-toast small{color:var(--text-muted);font-size:10px}.pwa-toast-close{width:var(--touch);height:var(--touch);padding:0;border:0;background:transparent;color:var(--text-muted);font-size:24px}.pwa-offline-toast{right:12px;bottom:calc(80px + var(--safe-bottom));left:12px;min-height:52px;padding:8px 12px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px}.card{border:1px solid var(--stroke);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow)}.button{min-height:var(--touch);padding:0 18px;border:1px solid transparent;border-radius:var(--r-md);display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;font-weight:600}.button--primary{background:var(--primary);color:#fff}.button--primary:hover{background:var(--primary-hover)}.button--secondary{border-color:var(--stroke);background:var(--surface)}.button--secondary:hover{border-color:var(--stroke-strong);background:var(--surface-2)}.button--compact{min-height:var(--touch);padding:0 12px;font-size:var(--fs-sm)}.button:disabled{cursor:not-allowed;opacity:.55}.icon-button{width:var(--touch);height:var(--touch);padding:0;border:1px solid var(--stroke);border-radius:50%;background:var(--surface);display:inline-grid;place-items:center;text-decoration:none}.icon-button:hover{background:var(--surface-2)}.text-button{min-height:var(--touch);padding:0;border:0;background:transparent;color:var(--accent);font-weight:600;text-decoration:none}.eyebrow{margin:0 0 4px;color:var(--text-muted);font-size:var(--fs-xs);font-weight:600;letter-spacing:.06em;text-transform:uppercase}.text-fresh{color:var(--viz-new)}.text-learning{color:var(--warn-stroke)}.text-known{color:var(--ok)}.preview-toolbar{position:sticky;top:0;z-index:50;min-height:var(--preview-toolbar-height);padding:5px max(10px,env(safe-area-inset-right)) 5px max(10px,env(safe-area-inset-left));border-bottom:1px solid var(--stroke);background:color-mix(in srgb,var(--surface) 94%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);display:flex;align-items:center;justify-content:flex-end;gap:8px}.preview-toolbar__label{margin-right:auto;padding:3px 9px;border-radius:var(--r-pill);background:var(--primary-soft);color:var(--primary);font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.preview-toolbar label{display:grid;gap:2px;color:var(--text-muted);font-size:9px;font-weight:600;letter-spacing:.05em;text-transform:uppercase}.preview-toolbar select{min-height:var(--touch);min-width:106px;padding:0 28px 0 9px;border:1px solid var(--stroke);border-radius:var(--r-sm);background:var(--surface);color:var(--text);font-size:12px;font-weight:600;letter-spacing:0;text-transform:none}.brand{display:inline-flex;align-items:center;min-height:var(--touch)}.brand__logo{width:auto;height:42px;object-fit:contain}.brand__logo--dark{display:none}.brand--compact .brand__logo{height:34px}:root[data-theme=dark] .brand__logo--light{display:none}:root[data-theme=dark] .brand__logo--dark{display:block}@media(prefers-color-scheme:dark){:root:not([data-theme=light]) .brand__logo--light{display:none}:root:not([data-theme=light]) .brand__logo--dark{display:block}}.app-shell{min-height:calc(100vh - var(--preview-toolbar-height))}.side-nav{display:none}.app-shell__main{min-width:0;padding-bottom:calc(76px + var(--safe-bottom))}.app-shell__main main{width:min(100%,1240px);margin:0 auto;padding:12px 12px 24px}.page-topbar{min-height:64px;padding:10px 14px;display:flex;align-items:center;gap:10px}.page-topbar h1{margin:0;flex:1;font-size:clamp(19px,4vw,28px);line-height:1.15}.avatar.page-topbar__avatar{display:none}.avatar{width:36px;height:36px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex:none;font-size:13px;font-weight:700}.status-chip{min-height:30px;padding:4px 9px;border:1px solid var(--stroke);border-radius:var(--r-pill);display:inline-flex;align-items:center;gap:6px;background:var(--surface);font-size:11px;line-height:1.15;white-space:nowrap}.status-chip i{width:7px;height:7px;border-radius:50%;background:var(--ok)}.status-chip--attention{border-color:transparent;background:var(--attention-soft)}.status-chip--attention i{background:var(--warn-stroke)}.status-chip--pending i{background:var(--accent)}.bottom-nav{position:fixed;right:0;bottom:0;left:0;z-index:40;min-height:calc(68px + var(--safe-bottom));padding:6px 4px var(--safe-bottom);border-top:1px solid var(--stroke);background:color-mix(in srgb,var(--surface) 96%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);display:grid;grid-template-columns:repeat(4,1fr)}.bottom-nav a,.bottom-nav button{min-height:56px;padding:0;border:0;border-radius:var(--r-sm);background:transparent;display:grid;place-content:center;justify-items:center;gap:3px;color:var(--text-muted);font-size:11px;text-decoration:none}.bottom-nav button:disabled{cursor:not-allowed;opacity:.72}.bottom-nav a.is-active{color:var(--primary)}.bottom-nav .icon{width:22px;height:22px}.state-layout{min-height:65vh}.state-layout--loading{padding:18px 0;display:grid;align-content:start;gap:12px}.skeleton{border-radius:var(--r-lg);background:linear-gradient(100deg,var(--surface-2) 30%,var(--surface) 50%,var(--surface-2) 70%);background-size:220% 100%;animation:shimmer 1.3s linear infinite}.skeleton--title{width:45%;height:34px}.skeleton--card{height:124px}.skeleton--short{width:70%;height:76px}@keyframes shimmer{to{background-position-x:-220%}}@media(prefers-reduced-motion:reduce){.skeleton{animation:none}}.state-layout--message{width:min(100%,520px);margin:0 auto;display:grid;place-content:center;justify-items:center;text-align:center}.state-layout--message h2{margin:14px 0 4px}.state-layout--message p{margin:0 0 18px;color:var(--text-muted);line-height:1.5}.state-layout__icon{width:68px;height:68px;border-radius:22px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center}.state-layout__icon--error{background:var(--rate-again);color:var(--rate-text);font-size:30px;font-weight:700}.progress-bar{width:100%;height:6px;border-radius:var(--r-pill);overflow:hidden;display:block;background:var(--surface-2)}.progress-bar i{height:100%;border-radius:inherit;display:block;background:var(--ok)}.progress-ring{flex:none;overflow:visible}.progress-ring--large{width:96px;height:96px}.progress-ring--small{width:52px;height:52px}.progress-ring circle{stroke-linecap:round}.progress-ring__track{stroke:var(--surface-2)}.progress-ring__known{stroke:var(--viz-know)}.progress-ring__learning{stroke:var(--viz-learn)}.progress-ring__fresh{stroke:var(--viz-new)}.progress-ring__label{fill:var(--text);font-family:var(--font-ui);font-size:18px;font-weight:700}.lesson-stack{width:100%;height:7px;display:flex;gap:2px}.lesson-stack i{border-radius:3px}.lesson-stack__fresh{background:var(--viz-new)}.lesson-stack__learning{background:var(--viz-learn)}.lesson-stack__known{background:var(--viz-know)}.lesson-stack__rest{background:var(--surface-2)}.home-layout,.home-sections,.home-summary{display:grid;gap:12px}.section-grid{display:grid;gap:10px}.learning-start-card{padding:18px;border:1px solid var(--stroke);border-radius:var(--r-lg);background:var(--accent-soft);box-shadow:var(--shadow);display:grid;gap:14px}.learning-start-card h2{margin:6px 0;font-size:clamp(20px,5vw,28px);line-height:1.15}.learning-start-card p{max-width:600px;margin:0;color:var(--text-muted);line-height:1.5}.learning-start-card__badge{padding:4px 9px;border-radius:var(--r-pill);background:var(--surface);color:var(--accent);font-size:11px;font-weight:700}.learning-start-card ol{margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:6px;list-style:none}.learning-start-card li{min-width:0;color:var(--text-muted);display:flex;align-items:center;gap:6px;font-size:12px}.learning-start-card li b{width:24px;height:24px;border-radius:50%;background:var(--surface);color:var(--accent);display:grid;place-items:center;flex:none}.learning-start-card>.button{width:100%}.section-card{min-height:86px;padding:12px;border:1px solid var(--stroke);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;text-decoration:none}.section-card:hover{border-color:var(--stroke-strong);transform:translateY(-1px)}.section-card__icon{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;flex:none}.section-card--words .section-card__icon{background:var(--tile-words)}.section-card--kanji .section-card__icon{background:var(--tile-kanji)}.section-card--alpha .section-card__icon{background:var(--tile-alpha)}.section-card--listen .section-card__icon{background:var(--tile-listen)}.section-card__icon .icon{width:28px;height:28px}.section-card__body{min-width:0;flex:1;display:grid;gap:4px}.section-card__body b{font-size:17px}.section-card__body small{overflow:hidden;color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap}.random-word{padding:14px;display:flex;align-items:center;gap:14px}.random-word small,.random-word p{color:var(--text-muted)}.random-word strong{display:block;font-size:29px;line-height:1.25}.random-word p{margin:0}.random-word__actions{margin-left:auto;display:flex;gap:7px}.rate-button{min-height:50px;padding:6px 12px;border:1px solid rgb(0 0 0 / 8%);border-radius:var(--r-md);color:var(--rate-text)}.rate-button--again{background:var(--rate-again)}.rate-button--hard{background:var(--rate-hard)}.rate-button--good{background:var(--rate-good)}.rate-button--easy{background:var(--rate-easy)}.repeat-card{padding:16px;border-radius:var(--r-lg);background:linear-gradient(135deg,var(--tile-repeat),var(--tile-alpha));display:grid}.repeat-card>span,.repeat-card small{color:var(--text-muted)}.repeat-card strong{margin:2px 0;font-size:42px;line-height:1}.repeat-card .button{margin-top:12px}.kpi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.kpi-card{min-width:0;padding:12px 8px;display:grid;text-align:center}.kpi-card strong{font-size:22px}.kpi-card span{color:var(--text-muted);font-size:11px}.today-card{padding:12px 14px}.today-card p{margin:4px 0 0;color:var(--text-muted);font-size:13px}.offline-note,.offline-banner{min-height:64px;padding:12px 14px;border:1px solid var(--warn-stroke);border-radius:var(--r-md);background:var(--attention-soft);display:flex;align-items:center;gap:12px;text-decoration:none}.offline-note span,.offline-banner span{display:grid;gap:2px}.offline-note small,.offline-banner small{color:var(--text-muted);line-height:1.35}.catalog-layout{display:grid;gap:12px}.group-tabs{margin:0 -12px;padding:0 12px;border-bottom:1px solid var(--stroke);overflow-x:auto;display:flex}.group-tabs button{min-width:66px;min-height:48px;padding:6px 12px;border:0;border-bottom:3px solid transparent;background:transparent;display:grid;color:var(--text-muted)}.group-tabs button.is-active{border-color:var(--accent);color:var(--text)}.group-tabs small{font-size:10px}.catalog-list{min-width:0}.catalog-empty{padding:24px;text-align:center}.catalog-empty p{margin:6px 0 0;color:var(--text-muted)}.catalog-group-header,.packages-card>header,.storage-card>header,.mistake-list>header{padding:4px 2px 10px;display:flex;align-items:center;justify-content:space-between;gap:10px}.catalog-group-header>span,.packages-card>header>span,.storage-card>header>span{min-width:0;display:grid;gap:2px}.catalog-group-header small,.storage-card header p{color:var(--text-muted)}.lesson-list{overflow:hidden}.lesson-row{min-height:78px;padding:10px 12px;border-bottom:1px solid var(--stroke);display:flex;align-items:center;gap:10px;text-decoration:none}.lesson-row:last-child{border-bottom:0}.lesson-row:hover,.lesson-row.is-selected{background:var(--accent-soft)}.lesson-row__number{width:32px;height:32px;border-radius:9px;background:var(--surface-2);color:var(--text-muted);display:grid;place-items:center;flex:none;font-size:12px;font-weight:700}.lesson-row__body{min-width:0;flex:1;display:grid;gap:3px}.lesson-row__body small{color:var(--text-muted)}.lesson-row__body em{margin-left:7px;padding:1px 6px;border-radius:var(--r-pill);background:var(--ok-soft);color:var(--ok);font-size:10px;font-style:normal;font-weight:700}.lesson-row__percent{width:40px;color:var(--text-muted);font-size:12px;font-weight:700;text-align:right}.lesson-row>.icon{width:18px;height:18px;color:var(--text-muted)}.catalog-detail{padding:16px;display:grid;gap:14px}.catalog-detail__hero{display:flex;align-items:center;gap:14px}.catalog-detail__hero h2{margin:0;font-size:19px}.catalog-detail__hero p{margin:4px 0;color:var(--text-muted)}.catalog-detail__hero small{line-height:1.5}.mini-skills{padding:5px;border-radius:var(--r-md);background:var(--surface-2);display:grid;grid-template-columns:repeat(3,1fr);gap:5px}.mini-skills>span{min-height:56px;padding:6px;border-radius:var(--r-sm);display:grid;place-content:center;justify-items:center;color:var(--text-muted);font-size:12px;text-align:center}.mini-skills>span.is-active{background:var(--surface);color:var(--text);font-weight:700;box-shadow:var(--shadow)}.mini-skills small{font-size:9px}.catalog-detail__links{margin:0;color:var(--text-muted);font-size:13px}.hub-layout{display:grid;gap:12px}.hub-card{padding:16px}.hub-card__hero{display:flex;align-items:center;gap:14px}.hub-card__hero h2{margin:0;font-size:22px}.hub-card__hero p:not(.eyebrow){margin:4px 0;color:var(--text-muted)}.downloaded-label{color:var(--ok);font-size:12px;font-weight:700}.skill-section,.skill-progress{margin-top:20px}.skill-section h3,.skill-progress h3{margin:0 0 8px;font-size:14px;font-weight:700}.skill-toggle{padding:6px;border-radius:var(--r-lg);background:var(--surface-2);box-shadow:inset 0 2px 6px #00000014;display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.skill-toggle button{position:relative;min-height:78px;padding:8px 4px;border:0;border-radius:var(--r-md);background:transparent;display:grid;place-content:center;justify-items:center;gap:3px;color:var(--text-muted);font-size:12px}.skill-toggle button.is-active{background:var(--surface);color:var(--text);font-weight:700;box-shadow:var(--shadow-raised)}.skill-toggle button .icon:last-child{position:absolute;top:5px;right:5px;width:15px;height:15px;color:var(--ok)}.skill-toggle small{max-width:90px;color:var(--text-muted);font-size:9px;font-weight:400}.skill-progress{display:grid;gap:8px}.skill-progress__row{display:grid;grid-template-columns:72px 1fr 38px;align-items:center;gap:8px;font-size:12px}.skill-progress__row b{color:var(--text-muted);text-align:right}.hub-links{margin-top:18px;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.hub-links button{min-height:72px;padding:8px 4px;border:1px solid var(--stroke);border-radius:var(--r-md);background:var(--surface);display:grid;place-content:center;justify-items:center;gap:5px;font-size:11px}.hub-start{width:100%;margin-top:14px}.hub-footnote{margin:6px 0 0;color:var(--text-muted);font-size:11px;text-align:center}.hub-aside{display:grid;align-content:start;gap:10px}.hub-stat-card,.hub-tip{padding:14px}.hub-stat-card h2{margin:0 0 10px;font-size:16px}.hub-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.hub-stat-grid span{display:grid;color:var(--text-muted);font-size:11px;text-align:center}.hub-stat-grid b{font-size:22px}.hub-tip p{margin:6px 0 0;color:var(--text-muted);font-size:13px;line-height:1.45}.study-shell{min-height:calc(100vh - var(--preview-toolbar-height));display:flex;flex-direction:column}.study-header{min-height:66px;padding:8px 10px;border-bottom:1px solid var(--stroke);background:var(--surface);display:flex;align-items:center;gap:8px}.study-header__title{min-width:0;flex:1;display:grid}.study-header__title h1,.study-header__title small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.study-header__title h1{margin:0;font-size:16px;line-height:1.25}.study-header__title small{color:var(--text-muted);font-size:11px}.study-header__actions{display:none}.study-header>.status-chip{display:none}.chip-button{min-height:var(--touch);padding:0 10px;border:1px solid var(--stroke);border-radius:var(--r-pill);background:var(--surface);font-size:11px}.chip-button--ok{border-color:transparent;background:var(--ok-soft)}.study-progress-mobile{padding:7px 12px 0}.study-layout{width:min(100%,1220px);margin:0 auto;padding:8px 12px 14px;flex:1;display:grid}.study-stage{min-width:0;display:flex;flex-direction:column}.study-step-label{margin:0 0 6px;color:var(--text-muted);font-size:12px;font-weight:700;text-align:center}.mode-switch{width:min(100%,300px);margin:0 auto 8px;padding:3px;border-radius:var(--r-pill);background:var(--surface-2);display:grid;grid-template-columns:1fr 1fr}.mode-switch button{min-height:var(--touch);border:0;border-radius:var(--r-pill);background:transparent;color:var(--text-muted);font-size:13px}.mode-switch button[aria-pressed=true]{background:var(--surface);color:var(--text);font-weight:700;box-shadow:var(--shadow)}.round-indicator{width:min(100%,420px);margin:0 auto 8px;padding:3px;border-radius:var(--r-pill);background:var(--surface-2);display:grid;grid-template-columns:repeat(3,1fr);gap:3px}.round-indicator span{min-height:34px;border-radius:var(--r-pill);display:grid;place-items:center;color:var(--text-muted);font-size:11px;font-weight:700}.round-indicator span[aria-current=step]{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}.question-card{min-height:375px;padding:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.question-card>strong,.question-choice__prompt strong{font-size:clamp(58px,18vw,112px);line-height:1.25}.question-card h2{margin:4px 0;font-size:22px}.question-card>p:not(.eyebrow){margin:8px 0 14px;color:var(--text-muted)}.reveal-button{width:min(100%,320px);margin-top:36px}kbd{min-width:24px;padding:2px 6px;border:1px solid currentColor;border-radius:6px;font-family:var(--font-ui);font-size:11px;font-weight:600;text-align:center;opacity:.7}.question-choice{display:grid;gap:10px}.question-choice__prompt{padding:18px;text-align:center}.choice-list{display:grid;gap:8px}.choice-list button{min-height:52px;padding:0 14px;border:1px solid var(--stroke);border-radius:var(--r-md);background:var(--surface);display:flex;align-items:center;gap:12px;font-size:18px;text-align:left}.choice-list button:hover{border-color:var(--accent)}.choice-list button:disabled{cursor:default;color:inherit;opacity:1}.choice-list button.is-correct{border-color:var(--ok);background:var(--ok-soft)}.choice-list button.is-wrong{border-color:var(--ink-error);background:var(--rate-again)}.choice-list button>.icon{margin-left:auto;color:var(--ok)}.choice-result{padding:10px 14px;border-radius:var(--r-md);display:flex;align-items:center;gap:8px;font-size:13px}.choice-result.is-correct{background:var(--ok-soft)}.choice-result.is-wrong{background:var(--rate-again)}.choice-result span:last-child{margin-left:auto;color:var(--text-muted)}.kana-question{min-height:375px;padding:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.kana-question>strong{font-size:clamp(58px,18vw,112px);line-height:1.25}.kana-question form{width:min(100%,430px);margin-top:28px;display:grid;gap:9px}.kana-question input{width:100%;height:56px;padding:0 14px;border:1px solid var(--stroke);border-radius:var(--r-md);background:var(--surface);color:var(--text);font-size:21px;text-align:center}.kana-question input:focus{border-color:var(--accent);outline:3px solid var(--accent-soft)}.kana-question input[aria-invalid=true]{border-color:var(--ink-error)}.kana-question form>small{color:var(--text-muted);font-size:11px}.kana-question .choice-result{text-align:left}.study-continue{width:min(100%,420px);margin:auto auto 0}.rate-grid{margin-top:auto;padding-top:10px;display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.rate-grid .rate-button{min-height:64px;display:grid;grid-template-columns:auto 1fr;align-content:center;text-align:left}.rate-grid .rate-button small{grid-column:2}.study-update-note{margin-top:8px;padding:9px 12px;border-radius:var(--r-sm);background:var(--attention-soft);color:var(--text-muted);font-size:12px;text-align:center}.study-aside{display:none}.lesson-progress>span{display:flex;justify-content:space-between;font-size:12px}.lesson-progress .lesson-stack{margin:5px 0}.lesson-progress>small{font-size:10px}.keyboard-help,.desktop-writing-note{padding:14px}.keyboard-help h2{margin:0 0 6px;font-size:15px}.keyboard-help p{margin:0;padding:7px 0;border-bottom:1px solid var(--stroke);display:flex;justify-content:space-between;align-items:center;color:var(--text-muted);font-size:12px}.keyboard-help p:last-child{border-bottom:0}.desktop-writing-note p{margin:6px 0 0;color:var(--text-muted);font-size:12px;line-height:1.45}.result-layout{display:grid;gap:12px}.finish-summary,.mistake-list{padding:16px}.finish-summary__hero{display:flex;align-items:center;gap:14px}.finish-summary__hero h2{margin:0;font-size:24px}.finish-summary__hero p:not(.eyebrow){margin:4px 0 8px;color:var(--text-muted)}.result-example-note{margin:14px 0 0;padding:10px 12px;border-radius:var(--r-sm);background:var(--attention-soft);color:var(--text-muted);font-size:12px;line-height:1.45}.streak-chip{padding:4px 9px;border-radius:var(--r-pill);background:var(--attention-soft);font-size:12px;font-weight:700}.delta-grid{margin-top:18px;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.delta-grid article{padding:12px 6px;border-radius:var(--r-md);background:var(--surface-2);display:grid;text-align:center}.delta-grid strong{font-size:22px}.delta-grid span{color:var(--text-muted);font-size:11px}.finish-actions{margin-top:16px;display:grid;gap:8px}.mistake-list header h2{margin:0;font-size:19px}.mistake-list>article{min-height:68px;padding:9px 0;border-top:1px solid var(--stroke);display:flex;align-items:center;gap:10px}.mistake-list__icon{width:32px;height:32px;border-radius:10px;background:var(--rate-again);color:var(--rate-text);display:grid;place-items:center;flex:none;font-weight:700}.mistake-list>article>span:nth-child(2){min-width:0;flex:1;display:grid}.mistake-list>article b{font-size:18px}.mistake-list>article small{color:var(--text-muted)}.mistake-list>article em{color:var(--text-muted);font-size:11px;font-style:normal}.result-no-mistakes{min-height:92px;margin-top:8px;padding:14px;border-radius:var(--r-md);background:var(--ok-soft);display:flex;align-items:center;gap:12px}.result-no-mistakes>.icon{width:30px;height:30px;color:var(--ok)}.result-no-mistakes>span{display:grid;gap:3px}.result-no-mistakes small{color:var(--text-muted)}.offline-layout,.offline-main,.offline-aside{display:grid;align-content:start;gap:12px}.storage-card,.packages-card,.sync-card,.ios-tip{padding:14px}.storage-card h2,.packages-card h2,.sync-card h2{margin:0;font-size:19px}.storage-card>header>b{color:var(--text-muted);font-size:12px}.storage-meter{height:14px;border-radius:var(--r-pill);overflow:hidden;display:flex;gap:2px;background:var(--surface-2)}.storage-meter i{min-width:4px}.storage-meter__lessons,.storage-legend i.lessons{background:var(--viz-new)}.storage-meter__audio,.storage-legend i.audio{background:var(--viz-learn)}.storage-meter__writing,.storage-legend i.writing{background:var(--viz-know)}.storage-meter__free{background:var(--surface-2)}.storage-legend{margin-top:9px;display:flex;flex-wrap:wrap;gap:6px 12px;color:var(--text-muted);font-size:10px}.storage-legend span{display:flex;align-items:center;gap:5px}.storage-legend i{width:8px;height:8px;border-radius:3px}.packages-card{padding-bottom:4px}.package-row{min-height:82px;padding:10px 0;border-top:1px solid var(--stroke);display:flex;align-items:center;gap:9px}.package-row__state{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;flex:none;font-weight:700}.package-row__state--downloading,.package-row__state--verifying{background:var(--accent-soft);color:var(--accent)}.package-row__state--ready{background:var(--ok-soft);color:var(--ok)}.package-row__state--failed{background:var(--rate-again);color:var(--rate-text)}.package-row__body{min-width:0;flex:1;display:grid;gap:3px}.package-row__body b,.package-row__body small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.package-row__body small{color:var(--text-muted);font-size:11px}.package-row__label{display:none;font-size:11px;font-weight:700}.package-row__label--ready{color:var(--ok)}.package-row__label--failed{color:var(--ink-error)}.package-row .button--compact{min-height:var(--touch);padding:0 8px;font-size:11px}.sync-card{display:flex;gap:12px}.sync-card__icon{width:46px;height:46px;border-radius:14px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;flex:none}.sync-card p:not(.eyebrow),.ios-tip p{margin:5px 0 0;color:var(--text-muted);font-size:12px;line-height:1.45}.ios-tip{background:var(--surface-2)}.profile-layout{display:grid;align-content:start;gap:12px}.profile-layout--loading{min-height:420px}.profile-notice{min-height:var(--touch);padding:10px 13px;border-radius:var(--r-md);background:var(--attention-soft);display:flex;align-items:center;gap:9px;font-size:13px;font-weight:600}.profile-identity,.profile-account,.profile-app,.profile-sessions,.profile-danger{padding:16px}.profile-identity{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:14px}.profile-avatar{width:72px;height:72px;font-size:25px}.profile-identity h2,.profile-account h2,.profile-app h2,.profile-sessions h2,.profile-danger h2{margin:0;font-size:20px}.profile-app{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:12px}.profile-app__icon{width:48px;height:48px;border-radius:12px;overflow:hidden}.profile-app__icon img{width:100%;height:100%;display:block}.profile-app h2{font-size:17px}.profile-app small{color:var(--text-muted);font-size:11px;line-height:1.4}.profile-app>.button{grid-column:1 / -1}.profile-identity p:not(.eyebrow){margin:4px 0 0;overflow:hidden;color:var(--text-muted);font-size:13px;text-overflow:ellipsis}.profile-back{grid-column:1 / -1;justify-self:start}.profile-account dl{margin:10px 0 0}.profile-account dl>div{min-height:48px;padding:8px 0;border-top:1px solid var(--stroke);display:flex;align-items:center;justify-content:space-between;gap:12px}.profile-account dt{font-weight:600}.profile-account dd{margin:0;overflow:hidden;color:var(--text-muted);font-size:12px;text-align:right;text-overflow:ellipsis}.profile-sessions>header{margin-bottom:2px;display:flex;align-items:center;justify-content:space-between;gap:12px}.profile-sessions>header>b{min-width:30px;height:30px;border-radius:var(--r-pill);background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-size:12px}.profile-session-row{min-height:72px;padding:10px 0;border-top:1px solid var(--stroke);display:flex;align-items:center;gap:10px}.profile-session-row__icon{width:42px;height:42px;border-radius:13px;background:var(--surface-2);color:var(--accent);display:grid;place-items:center;flex:none}.profile-session-row__icon .icon{width:22px;height:22px}.profile-session-row>span:nth-child(2){min-width:0;flex:1;display:grid;gap:4px}.profile-session-row b,.profile-session-row small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-session-row b{font-size:14px}.profile-session-row b em{margin-left:7px;padding:3px 7px;border-radius:var(--r-pill);background:var(--ok-soft);color:var(--ok);font-size:9px;font-style:normal;white-space:nowrap}.profile-session-row small,.profile-sessions__empty{color:var(--text-muted);font-size:11px}.profile-session-row__revoke{min-width:var(--touch);padding:0 4px;color:var(--ink-error);font-size:12px}.profile-sessions__empty{margin:0;padding:14px 0;border-top:1px solid var(--stroke);line-height:1.5}.profile-danger>p{margin:8px 0 14px;color:var(--text-muted);font-size:12px;line-height:1.5}.profile-danger>div{display:grid;gap:8px}.profile-danger__all{border-color:color-mix(in srgb,var(--ink-error) 34%,transparent);background:transparent;color:var(--ink-error)}.profile-danger__all:hover{background:var(--rate-again)}.profile-action-error{color:var(--ink-error)!important}.profile-message{min-height:420px}.confirm-dialog{width:min(calc(100% - 32px),440px);padding:20px;border:1px solid var(--stroke);border-radius:var(--r-lg);background:var(--surface);color:var(--text);box-shadow:var(--shadow-raised)}.confirm-dialog::backdrop{background:color-mix(in srgb,var(--text) 38%,transparent)}.confirm-dialog h2{margin:0;font-size:20px}.confirm-dialog p{margin:9px 0 18px;color:var(--text-muted);font-size:13px;line-height:1.5}.confirm-dialog>div{display:grid;gap:8px}.auth-screen{min-height:calc(100vh - var(--preview-toolbar-height));display:grid;background:var(--bg)}.auth-panel{width:min(100%,480px);min-height:calc(100vh - var(--preview-toolbar-height));margin:0 auto;padding:clamp(24px,8vw,52px) 24px 20px;display:flex;flex-direction:column}.auth-panel__brand{margin-bottom:24px;text-align:center}.auth-panel__brand .brand{justify-content:center}.auth-panel__brand>p{margin:12px 0 0;color:var(--text-muted);font-size:14px;line-height:1.5}.form-field{display:grid;gap:7px;color:var(--text-muted);font-size:13px}.form-field input{width:100%;height:52px;padding:0 14px;border:1px solid var(--stroke);border-radius:var(--r-md);background:var(--surface);color:var(--text);font-size:17px}.form-field input:focus{border-color:var(--accent);outline:3px solid var(--accent-soft)}.form-field small{color:var(--text-muted);font-size:11px;line-height:1.45}.auth-submit{width:100%;min-height:52px;margin-top:16px}.auth-password-field{margin-top:14px}.auth-password-toggle{align-self:center;min-height:44px;margin:0 auto 8px}.auth-feedback{min-height:18px;margin:8px 0 0;display:block;font-size:12px;line-height:1.45;text-align:center}.auth-feedback--status{color:var(--text-muted)}.auth-feedback--error{color:var(--ink-error)}.auth-legal{margin:6px 0 20px;color:var(--text-muted);font-size:11px;line-height:1.5;text-align:center}.auth-why{margin-top:auto;padding:13px 14px;border-radius:var(--r-md);background:var(--surface-2)}.auth-why p{margin:4px 0 0;color:var(--text-muted);font-size:13px;line-height:1.45}.auth-why--attention{background:var(--attention-soft)}.auth-visual{display:none}.mail-panel{text-align:center}.mail-icon{width:96px;height:96px;margin:4px auto 0;border-radius:50%;background:var(--tile-words);display:grid;place-items:center}.mail-icon .icon{width:44px;height:44px}.mail-panel h1{margin:16px 0 4px;font-size:24px}.mail-panel__lead{margin:0;color:var(--text-muted);font-size:13px}.mail-steps{margin:22px 0 4px;padding:0;display:grid;gap:12px;list-style:none;text-align:left}.mail-steps li{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.4}.mail-steps i{width:24px;height:24px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex:none;font-size:11px;font-style:normal;font-weight:700}.mail-change{margin:5px auto 12px;display:inline-grid;place-items:center}.mail-resend-feedback{min-height:34px;margin:7px 0 0;color:var(--ok);font-size:11px;line-height:1.45}.mail-resend-feedback.is-error{color:var(--ink-error)}.auth-link-panel{justify-content:center}.demo-mail-link{padding:12px;border:1px solid var(--stroke);border-radius:var(--r-md);background:var(--accent-soft)}.demo-mail-link p{margin:0 0 10px;color:var(--text-muted);font-size:13px;line-height:1.45}.demo-mail-link .button{width:100%}.not-found{min-height:calc(100vh - var(--preview-toolbar-height));padding:24px;display:grid;place-content:center;justify-items:center;text-align:center}.not-found h1{margin:0}.not-found>p:not(.eyebrow){max-width:460px;color:var(--text-muted)}@media(min-width:620px){.pwa-update-toast{right:16px;left:auto;width:min(520px,calc(100% - 32px))}.pwa-offline-toast{right:16px;left:auto;width:min(420px,calc(100% - 32px))}.profile-app{grid-template-columns:auto minmax(0,1fr) auto}.profile-app>.button{grid-column:auto}.app-shell__main main{padding:16px 20px 32px}.section-grid{grid-template-columns:1fr 1fr}.learning-start-card{grid-template-columns:minmax(0,1fr) auto;align-items:center}.learning-start-card ol{grid-column:1}.learning-start-card>.button{width:auto;grid-column:2;grid-row:1 / span 2}.section-card{min-height:106px}.finish-actions{grid-template-columns:1fr 1fr}.package-row__label{display:block}.rate-grid{grid-template-columns:repeat(4,1fr)}.rate-grid .rate-button{grid-template-columns:auto 1fr}}@media(min-width:780px){.profile-layout{grid-template-columns:minmax(0,1.45fr) minmax(280px,.75fr);align-items:start}.profile-notice,.profile-identity{grid-column:1 / -1}.profile-identity{grid-template-columns:auto minmax(0,1fr) auto}.profile-back{grid-column:auto}.profile-account,.profile-app{grid-column:2}.profile-sessions{grid-column:1;grid-row:span 2}.profile-danger{grid-column:2}.confirm-dialog>div,.profile-danger>div{grid-template-columns:1fr 1fr}.catalog-layout{grid-template-columns:110px minmax(0,1fr) 300px;align-items:start}.group-tabs{position:sticky;top:66px;margin:0;padding:6px;border:1px solid var(--stroke);border-radius:var(--r-lg);background:var(--surface);display:grid;overflow:visible}.group-tabs button{min-height:50px;border:0;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:space-between}.group-tabs button.is-active{background:var(--accent-soft)}.catalog-detail{position:sticky;top:66px}.hub-layout,.result-layout,.offline-layout{grid-template-columns:minmax(0,2fr) minmax(260px,1fr);align-items:start}.hub-card{padding:22px}}@media(min-width:1024px){.pwa-install-banner,.pwa-offline-toast{bottom:18px}.preview-toolbar{padding-right:20px;padding-left:20px}.app-shell{display:grid;grid-template-columns:226px minmax(0,1fr)}.side-nav{position:sticky;top:var(--preview-toolbar-height);height:calc(100vh - var(--preview-toolbar-height));padding:20px 14px 14px;border-right:1px solid var(--stroke);background:var(--surface);display:flex;flex-direction:column}.side-nav>.brand{margin:0 8px 26px}.side-nav nav{display:grid;gap:4px}.side-nav nav a,.side-nav nav button{min-height:46px;padding:0 12px;border:0;border-radius:var(--r-md);background:transparent;display:flex;align-items:center;gap:11px;color:var(--text-muted);font-size:14px;text-decoration:none}.side-nav nav a:hover,.side-nav nav a.is-active{background:var(--primary-soft);color:var(--primary)}.side-nav nav button:disabled{cursor:not-allowed;opacity:.72}.nav-badge{min-width:24px;height:22px;margin-left:auto;padding:0 6px;border-radius:var(--r-pill);background:var(--primary);color:#fff;display:grid;place-items:center;font-size:10px;font-weight:700}.side-nav__profile{margin-top:auto;padding:12px 8px 0;border-top:1px solid var(--stroke);display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none}.side-nav__profile>span:last-child{min-width:0;display:grid}.side-nav__profile b,.side-nav__profile small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.side-nav__profile b{font-size:13px}.side-nav__profile small{color:var(--text-muted);font-size:10px}.app-shell__main{padding-bottom:0}.page-topbar{min-height:76px;padding:16px 26px 8px}.page-topbar h1{font-size:28px}.mobile-brand{display:none}.avatar.page-topbar__avatar{display:grid}.bottom-nav{display:none}.app-shell__main main{padding:16px 28px 36px}.home-layout{grid-template-columns:minmax(0,2fr) minmax(280px,.8fr);gap:18px}.home-summary{align-content:start}.random-word{grid-column:1 / -1}.catalog-layout{grid-template-columns:110px minmax(0,1fr);gap:18px}.catalog-detail{display:none}.catalog-detail__hero .progress-ring{width:78px;height:78px}.hub-layout{grid-template-columns:minmax(0,1fr) 230px;gap:18px}.study-header{min-height:72px;padding:10px 28px}.study-header__actions,.study-header>.status-chip{display:flex}.study-progress-mobile{display:none}.study-layout{grid-template-columns:minmax(0,1fr) 230px;justify-content:center;gap:16px;padding:20px 24px}.study-aside{display:grid;align-content:start;gap:12px}.study-aside>.card:first-child{padding:14px}.question-card,.kana-question{min-height:470px}.question-choice__prompt strong{font-size:90px}.choice-list{grid-template-columns:1fr 1fr}.result-layout,.offline-layout{grid-template-columns:minmax(0,1.35fr) minmax(340px,.9fr);gap:18px}.auth-screen{grid-template-columns:minmax(420px,.75fr) minmax(520px,1.25fr)}.auth-screen--mail{grid-template-columns:1fr}.auth-panel{width:min(100%,520px);padding:54px 54px 32px}.auth-visual{min-width:0;padding:60px;background:linear-gradient(145deg,var(--primary-soft),var(--tile-alpha));display:grid;place-content:center;justify-items:center;color:var(--accent-title);text-align:center}.auth-visual>span{width:230px;height:230px;border:2px solid color-mix(in srgb,var(--primary) 35%,transparent);border-radius:64px;background:color-mix(in srgb,var(--surface) 62%,transparent);display:grid;place-items:center;font-size:132px;font-weight:700;box-shadow:var(--shadow-raised)}.auth-visual p{margin:30px 0 0;font-size:23px;font-weight:600;line-height:1.45}}@media(min-width:1200px){.catalog-layout{grid-template-columns:150px minmax(360px,1fr) 330px}.catalog-detail{display:grid}.hub-layout{grid-template-columns:minmax(500px,1.8fr) minmax(270px,.8fr)}.study-layout{grid-template-columns:minmax(0,760px) 270px;gap:24px;padding:20px 32px}}@media(max-width:440px){.preview-toolbar__label{display:none}.preview-toolbar{justify-content:space-between}.preview-toolbar label{flex:1}.preview-toolbar select{width:100%;min-width:0}.page-topbar{gap:7px}.page-topbar .status-chip{max-width:132px;overflow:hidden;text-overflow:ellipsis}.random-word{align-items:flex-start;flex-wrap:wrap}.random-word__actions{width:100%;margin-left:0}.random-word__actions>*{flex:1}.catalog-group-header{align-items:flex-start}.catalog-group-header .button{width:44px;padding:0;overflow:hidden;font-size:0}.catalog-group-header .button .icon{width:20px;height:20px}.catalog-detail,.lesson-row__percent{display:none}.hub-card__hero .progress-ring{width:78px;height:78px}.hub-card__hero h2{font-size:18px}.study-header .status-chip{display:none}.choice-result{flex-wrap:wrap}.choice-result span:last-child{width:100%;margin-left:0}.finish-summary__hero{align-items:flex-start}.finish-summary__hero .progress-ring{width:82px;height:82px}.finish-summary__hero h2{font-size:20px}.mistake-list header .button{width:44px;padding:0;overflow:hidden;font-size:0}.mistake-list header .button:before{content:"↻";font-size:20px}.mistake-list>article em{display:none}.package-row__state{width:34px;height:34px}}