:root{--bg: #fbfaf7;--surface: #ffffff;--surface-2: #f6f2ec;--ink: #33291f;--ink-2: #6f645a;--ink-3: #a89a8c;--border: #eae2d8;--border-strong: #dcd0c2;--primary: #c9412b;--primary-strong: #a93220;--primary-soft: #fbeae3;--sakura: #f7d9cc;--sakura-deep: #e8b3a0;--good: #3e7c5c;--good-soft: #e3efe8;--warn: #c08a2d;--warn-soft: #f6eddc;--bad: #c0453d;--bad-soft: #f7e4e2;--ring: #d9a441;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Yu Gothic UI", "Hiragino Kaku Gothic ProN", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;--font-jp: "Yu Mincho", "HG明朝体", "Hiragino Mincho ProN", "Noto Serif CJK JP", "SimSun", serif;--r-sm: 10px;--r-md: 16px;--r-lg: 24px;--r-pill: 999px;--shadow-1: 0 1px 2px rgba(60, 40, 20, .06), 0 2px 8px rgba(60, 40, 20, .05);--shadow-2: 0 4px 16px rgba(60, 40, 20, .1);--shadow-3: 0 10px 32px rgba(60, 40, 20, .16);--tabbar-h: 62px;--header-h: 56px;--content-max: 760px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px)}:root[data-theme=dark]{--bg: #1c1a17;--surface: #262320;--surface-2: #2e2a26;--ink: #efe6da;--ink-2: #b3a594;--ink-3: #7d7163;--border: #3a342d;--border-strong: #4a433a;--primary: #e07a5f;--primary-strong: #f0927a;--primary-soft: #3a2a24;--sakura: #5a3b30;--sakura-deep: #7a5145;--good: #7cb89a;--good-soft: #233a2d;--warn: #d9b064;--warn-soft: #3a3220;--bad: #e07070;--bad-soft: #3d2828;--shadow-1: 0 1px 2px rgba(0, 0, 0, .4);--shadow-2: 0 4px 16px rgba(0, 0, 0, .5);--shadow-3: 0 10px 32px rgba(0, 0, 0, .6)}@media(prefers-color-scheme:dark){:root:not([data-theme]){--bg: #1c1a17;--surface: #262320;--surface-2: #2e2a26;--ink: #efe6da;--ink-2: #b3a594;--ink-3: #7d7163;--border: #3a342d;--border-strong: #4a433a;--primary: #e07a5f;--primary-strong: #f0927a;--primary-soft: #3a2a24;--sakura: #5a3b30;--sakura-deep: #7a5145;--good: #7cb89a;--good-soft: #233a2d;--warn: #d9b064;--warn-soft: #3a3220;--bad: #e07070;--bad-soft: #3d2828;--shadow-1: 0 1px 2px rgba(0, 0, 0, .4);--shadow-2: 0 4px 16px rgba(0, 0, 0, .5);--shadow-3: 0 10px 32px rgba(0, 0, 0, .6)}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}#root{min-height:100dvh}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}input,select{font-family:inherit;font-size:16px;color:var(--ink)}h1,h2,h3,h4{margin:0;font-weight:700}.app-shell{min-height:100dvh;padding-bottom:calc(var(--tabbar-h) + var(--safe-bottom))}.app-main{max-width:var(--content-max);margin:0 auto;padding:calc(var(--header-h) + var(--safe-top) + 12px) 16px 24px}.app-header{position:fixed;top:0;left:0;right:0;height:calc(var(--header-h) + var(--safe-top));padding:var(--safe-top) 16px 0;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);z-index:40;display:flex;align-items:center;gap:12px}.app-header-inner{max-width:var(--content-max);margin:0 auto;width:100%;display:flex;align-items:center;gap:12px}.header-title{flex:1;font-size:17px;font-weight:700;letter-spacing:.02em;display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden}.icon-btn{width:38px;height:38px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);transition:background .15s}.icon-btn:active{background:var(--surface-2)}.icon-btn svg{width:21px;height:21px}.tabbar{position:fixed;left:0;right:0;bottom:0;height:calc(var(--tabbar-h) + var(--safe-bottom));padding-bottom:var(--safe-bottom);background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--border);z-index:40;display:flex}.tab-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--ink-3);font-size:11px;transition:color .15s}.tab-item svg{width:23px;height:23px}.tab-item.active{color:var(--primary)}@media(min-width:900px){.tabbar{left:50%;transform:translate(-50%);width:var(--content-max);border-radius:18px 18px 0 0}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:16px}.card+.card{margin-top:12px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:18px;box-shadow:var(--shadow-1)}.section-title{font-size:15px;font-weight:700;margin:22px 0 10px;display:flex;align-items:center;gap:8px}.section-title:before{content:"";width:4px;height:15px;border-radius:2px;background:var(--primary)}.muted{color:var(--ink-2)}.tiny{font-size:12px;color:var(--ink-3)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:var(--r-pill);padding:12px 20px;font-size:15px;font-weight:600;transition:transform .1s,opacity .15s,background .15s;-webkit-user-select:none;user-select:none}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.45;pointer-events:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:active{background:var(--primary-strong)}.btn-soft{background:var(--primary-soft);color:var(--primary)}.btn-ghost{background:transparent;border:1px solid var(--border-strong);color:var(--ink-2)}.btn-block{width:100%}.chip{display:inline-flex;align-items:center;border-radius:var(--r-pill);padding:5px 12px;font-size:12.5px;font-weight:600;background:var(--surface-2);color:var(--ink-2);white-space:nowrap}.chip.active{background:var(--primary);color:#fff}.chip-outline{background:transparent;border:1px solid var(--border-strong)}.tag{display:inline-flex;align-items:center;border-radius:6px;padding:2px 8px;font-size:11.5px;background:var(--primary-soft);color:var(--primary-strong)}.tag.neutral{background:var(--surface-2);color:var(--ink-2)}.tag.level-tag{background:var(--warn-soft);color:var(--warn)}.mastery-bar{position:relative;height:8px;border-radius:var(--r-pill);background:var(--surface-2);overflow:hidden}.mastery-bar-fill{position:absolute;inset:0 auto 0 0;border-radius:var(--r-pill);background:var(--primary);opacity:.85}.mastery-bar-mastered{background:var(--good);opacity:1;z-index:1}.search-box{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-pill);padding:10px 14px;box-shadow:var(--shadow-1)}.search-box input{flex:1;border:none;outline:none;background:transparent;min-width:0}.search-box svg{width:18px;height:18px;color:var(--ink-3);flex-shrink:0}.list{display:flex;flex-direction:column;gap:8px}.row-card{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:13px 14px;transition:transform .1s,border-color .15s}.row-card:active{transform:scale(.985);border-color:var(--border-strong)}.row-main{flex:1;min-width:0}.row-title{font-size:16px;font-weight:700}.row-sub{font-size:13px;color:var(--ink-2);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.kana-lg{font-weight:600;color:var(--ink)}.jp-main{font-family:var(--font-jp)}.empty{display:flex;flex-direction:column;align-items:center;gap:10px;padding:56px 20px;color:var(--ink-3);text-align:center}.empty svg{width:44px;height:44px;opacity:.6}.skeleton{border-radius:var(--r-md);background:linear-gradient(100deg,var(--surface-2) 30%,var(--surface) 50%,var(--surface-2) 70%);background-size:200% 100%;animation:shimmer 1.4s infinite}@keyframes shimmer{to{background-position-x:-200%}}@keyframes fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.fade-up{animation:fadeUp .28s ease both}@keyframes popIn{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.pop-in{animation:popIn .24s ease both}@media(prefers-reduced-motion:reduce){.fade-up,.pop-in,.skeleton{animation:none!important}}.divider{height:1px;background:var(--border);margin:14px 0}.flame{display:inline-flex;align-items:center;gap:4px;color:var(--primary);font-weight:700}.notice{background:var(--warn-soft);color:#8a5c14;border-radius:var(--r-md);padding:10px 14px;font-size:13px;line-height:1.5}.notice.error{background:var(--bad-soft);color:var(--bad)}.streak-0{color:var(--ink-3)!important;font-weight:500}@media(min-width:900px){.app-main{padding-bottom:120px}}.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:var(--primary);color:#fff;font-family:var(--font-jp);font-weight:700;font-size:16px;box-shadow:var(--shadow-1)}.install-banner{position:fixed;left:50%;bottom:calc(var(--tabbar-h) + var(--safe-bottom) + 10px);transform:translate(-50%);width:min(420px,calc(100% - 28px));display:flex;align-items:center;gap:10px;background:var(--ink);color:var(--bg);border-radius:var(--r-md);padding:10px 12px 10px 16px;box-shadow:var(--shadow-3);z-index:60;animation:fadeUp .3s ease both}.install-banner-text{flex:1;display:flex;flex-direction:column;line-height:1.35}.install-banner-text strong{font-size:14px}.install-banner-text span{font-size:12px;opacity:.75}.install-banner-btn{padding:8px 16px;font-size:14px}.flip-wrap{perspective:1200px;cursor:pointer;width:min(460px,100%);margin:0 auto}.flip-inner{position:relative;width:100%;min-height:380px;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.4,.2,.2,1)}.flip-wrap.show-back .flip-inner{transform:rotateY(180deg)}@media(prefers-reduced-motion:reduce){.flip-inner{transition:none}}.flip-face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:380px;border-radius:var(--r-lg);padding:26px;text-align:center}.flip-back{transform:rotateY(180deg);justify-content:flex-start;align-items:stretch;text-align:left;overflow:auto;max-height:70vh}.flip-display{font-size:clamp(34px,10vw,48px);font-weight:700;letter-spacing:.04em;line-height:1.2;color:var(--ink);word-break:break-all}.flip-grammar{font-size:clamp(26px,7vw,36px)}.flip-kana{font-size:24px;color:var(--primary);font-weight:600;letter-spacing:.06em}.flip-hint{opacity:.7}.new-badge{position:absolute;top:16px;right:16px;font-size:11.5px;padding:3px 10px;border-radius:var(--r-pill);background:var(--primary-soft);color:var(--primary-strong)}.flip-back-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.flip-word{font-size:28px;font-weight:700}.flip-kana-inline{font-size:20px;color:var(--primary);margin-left:8px;font-weight:600}.flip-content{display:flex;align-items:baseline;flex-wrap:wrap}.flip-posrow{display:flex;gap:8px;margin:4px 0 8px}.flip-meaning{font-size:18px;font-weight:600;line-height:1.5;color:var(--ink);margin-bottom:12px}.ex-block{border-top:1px dashed var(--border);padding-top:10px;margin-top:10px}.ex-ja{font-size:15.5px;line-height:1.6}.ex-zh{font-size:13.5px;color:var(--ink-2);margin-top:2px}.nuance{font-size:13.5px;background:var(--warn-soft);border-radius:10px;padding:8px 12px;line-height:1.6;margin-top:8px}.grade-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;width:min(480px,100%);margin:16px auto 0}.grade-btn{display:flex;flex-direction:column;align-items:center;gap:2px;border-radius:var(--r-md);padding:12px 4px;font-weight:700;font-size:14px;border:1px solid var(--border);background:var(--surface);transition:transform .1s,box-shadow .15s}.grade-btn small{font-weight:500;font-size:11px;opacity:.75}.grade-btn:active{transform:scale(.95)}.grade-g0{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 35%,transparent);background:var(--bad-soft)}.grade-g1{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 35%,transparent);background:var(--warn-soft)}.grade-g2{color:var(--good);border-color:color-mix(in srgb,var(--good) 35%,transparent);background:var(--good-soft)}.grade-g3{color:var(--primary);border-color:color-mix(in srgb,var(--primary) 35%,transparent);background:var(--primary-soft)}.review-top{display:flex;align-items:center;justify-content:space-between;width:min(480px,100%);margin:0 auto 14px}.review-progress-label{font-size:13px;color:var(--ink-2)}.review-count{font-weight:700;font-family:var(--font-sans)}.heatmap{display:flex;gap:8px;align-items:flex-start}.heatmap-dow{display:flex;flex-direction:column;gap:3px;padding-top:2px}.heatmap-dow span{height:11px;line-height:11px;font-size:10px}.heatmap-grid{display:flex;gap:3px;overflow-x:auto;flex:1}.heatmap-week{display:flex;flex-direction:column;gap:3px}.heatmap-cell{width:11px;height:11px;border-radius:3px}.heatmap-cell:hover{outline:2px solid var(--primary)}.linechart{width:100%;height:auto}.chart-tick{font-size:10px;fill:var(--ink-3)}.month-strip{position:relative;height:16px}.month-strip span{position:absolute}.quiz-option{width:100%;text-align:left;border:1.5px solid var(--border);border-radius:var(--r-md);padding:14px 16px;font-size:15.5px;background:var(--surface);display:flex;align-items:center;gap:10px;transition:border-color .15s,background .15s,transform .1s}.quiz-option:active{transform:scale(.985)}.quiz-option .opt-key{width:26px;height:26px;border-radius:8px;background:var(--surface-2);display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0}.quiz-option.selected{border-color:var(--primary);background:var(--primary-soft)}.quiz-option.correct{border-color:var(--good);background:var(--good-soft)}.quiz-option.wrong{border-color:var(--bad);background:var(--bad-soft)}.quiz-prompt{font-family:var(--font-jp);font-size:clamp(24px,7vw,32px);font-weight:700;text-align:center;line-height:1.4;margin:6px 0 4px;word-break:break-all}.quiz-sub{text-align:center;color:var(--ink-2);font-size:14px;min-height:20px}.result-score{font-size:52px;font-weight:800;color:var(--primary);font-family:var(--font-sans)}.result-stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:18px 0 22px}.stat-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:14px;text-align:center}.stat-box .v{font-size:22px;font-weight:800}.stat-box .k{font-size:12px;color:var(--ink-2);margin-top:2px}.hero{background:linear-gradient(150deg,var(--primary) 0%,var(--primary-strong) 100%);color:#fff;border-radius:var(--r-lg);padding:22px 20px;box-shadow:var(--shadow-2);position:relative;overflow:hidden}.hero:after{content:"語";position:absolute;right:-6px;top:-22px;font-family:var(--font-jp);font-size:110px;opacity:.14;transform:rotate(8deg)}.hero-greeting{font-size:14px;opacity:.85}.hero-title{font-size:24px;font-weight:800;margin-top:4px}.hero-stats{display:flex;gap:18px;margin-top:16px}.hero-stat .v{font-size:22px;font-weight:800}.hero-stat .k{font-size:12px;opacity:.8}.due-block{display:flex;align-items:center;gap:16px}.due-num{font-size:34px;font-weight:800;color:var(--primary);line-height:1}.quick-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(102px,1fr));gap:10px}.quick-card{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:14px;font-weight:600;font-size:14.5px;transition:transform .1s,border-color .15s;text-align:left}.quick-card:active{transform:scale(.98);border-color:var(--border-strong)}.quick-icon{width:34px;height:34px;border-radius:10px;background:var(--primary-soft);color:var(--primary);display:inline-flex;align-items:center;justify-content:center}.quick-icon svg{width:19px;height:19px}.quick-card.sel{border-color:var(--primary);background:var(--primary-soft)}.quiz-option.dim{opacity:.42}.quiz-option.correct .opt-key,.quiz-option.wrong .opt-key{color:#fff}.quiz-option.correct .opt-key{background:var(--good)}.quiz-option.wrong .opt-key{background:var(--bad)}.filter-row{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin:12px 0;scrollbar-width:none}.filter-row::-webkit-scrollbar{display:none}.word-row-extra{display:flex;align-items:center;gap:6px;flex-shrink:0}.word-row-kana{font-size:14px;color:var(--primary);font-weight:600}.load-sentinel{height:40px;display:flex;align-items:center;justify-content:center;color:var(--ink-3);font-size:13px}.seed-screen{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:var(--bg);padding:24px;text-align:center}.seed-logo{width:84px;height:84px;border-radius:24px;background:var(--primary);color:#fff;font-family:var(--font-jp);font-size:46px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-3)}.seed-title{font-size:22px;font-weight:800;margin-top:6px}.seed-sub{color:var(--ink-2);font-size:14px}.seed-bar{width:min(280px,80%);height:8px;border-radius:999px;background:var(--border);overflow:hidden;margin-top:18px}.seed-bar-fill{height:100%;background:var(--primary);border-radius:999px;transition:width .25s}.seed-hint{font-size:13px;color:var(--ink-3)}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0}.setting-row+.setting-row{border-top:1px solid var(--border)}.setting-label{font-weight:600;font-size:14.5px}.setting-desc{font-size:12px;color:var(--ink-3);margin-top:2px}.switch{position:relative;width:46px;height:27px;border-radius:999px;background:var(--border-strong);transition:background .2s;flex-shrink:0}.switch.on{background:var(--primary)}.switch:after{content:"";position:absolute;top:3px;left:3px;width:21px;height:21px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px #00000040}.switch.on:after{transform:translate(19px)}.seg{display:inline-flex;background:var(--surface-2);border-radius:var(--r-pill);padding:3px;gap:2px}.seg button{padding:6px 14px;border-radius:var(--r-pill);font-size:13px;font-weight:600;color:var(--ink-2);transition:background .15s,color .15s}.seg button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow-1)}.range-row{display:flex;align-items:center;gap:12px}.range-row input[type=range]{flex:1;accent-color:var(--primary)}.danger-zone{display:flex;flex-direction:column;gap:8px;padding-top:4px}.kana-section-head{display:flex;align-items:center;gap:8px;margin:18px 0 8px}.kana-section-head .chip{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--border-strong)}.kana-table{display:flex;flex-direction:column;gap:6px}.kana-row{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.kana-cell{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:10px 2px;border-radius:12px;background:var(--surface-2);border:1px solid transparent;transition:background .15s,border-color .15s,transform .1s}.kana-cell:not(:disabled):hover{background:var(--primary-soft);border-color:var(--primary)}.kana-cell:not(:disabled):active{transform:scale(.95)}.kana-cell:disabled{opacity:0;pointer-events:none}.kana-char{font-size:21px;font-weight:700;line-height:1.2}.kana-char.dim{color:var(--ink-3)}.kana-ro{font-size:10.5px;color:var(--ink-3);letter-spacing:.3px}.swipe-card{min-height:260px;display:flex!important;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;-webkit-user-select:none;user-select:none}.swipe-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.spell-input{width:100%;text-align:center;font-size:20px;letter-spacing:2px;padding:12px;border-radius:var(--r-md);background:var(--surface-2);color:var(--ink)}.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(86px,1fr));gap:10px}.ach-item{display:flex;flex-direction:column;align-items:center;gap:3px;text-align:center;padding:10px 4px;border-radius:var(--r-md);background:var(--surface-2);opacity:.72}.ach-item.done{background:var(--good-soft);opacity:1}.ach-badge{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;background:var(--surface);color:var(--ink-3)}.ach-item.done .ach-badge{background:var(--good);color:#fff}.ach-name{font-size:11.5px;font-weight:600;color:var(--ink)}.ach-desc{font-size:10px;color:var(--ink-3)}.dict-block{margin-top:14px}.dict-entry{padding:10px 0;border-bottom:1px solid var(--border)}.dict-entry:last-child{border-bottom:none}.dict-sense{display:flex;gap:8px;margin-top:4px}.dict-sense .tag{flex-shrink:0}.ex-ja{cursor:pointer}.ex-vol{width:12px;height:12px;opacity:.55;display:inline-block;margin-left:2px;vertical-align:-1px}