:root{--color-bg:#fff;--color-surface:#f5f5f5;--color-border:#e0e0e0;--color-text:#1a1a1a;--color-text-muted:#666;--color-accent:#c0392b;--color-accent-hover:#a93226;--color-success:#27ae60;--color-warn:#e67e22;--font-sans:system-ui, -apple-system, sans-serif;--font-kanji:"Noto Sans JP", "Yu Gothic", sans-serif;--radius:6px;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:32px;--spacing-xl:64px;--max-width:960px;--nav-height:56px}@media (prefers-color-scheme:dark){:root{--color-bg:#121212;--color-surface:#1e1e1e;--color-border:#333;--color-text:#e8e8e8;--color-text-muted:#999}.kanji-card .kanji{color:#fff}.chip{color:#bbb;border-color:#4a4a4a}.setup-mode-card{border-color:#4a4a4a}.setup-mode-card span:last-of-type{color:#bbb}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);min-height:100dvh;line-height:1.6}header{z-index:10;background:var(--color-bg);border-bottom:1px solid var(--color-border);height:var(--nav-height);position:sticky;top:0}nav{align-items:center;gap:var(--spacing-lg);max-width:var(--max-width);padding:0 var(--spacing-md);height:100%;margin:0 auto;display:flex}nav a{color:var(--color-text-muted);font-size:.9rem;text-decoration:none}nav a:hover,nav a.active{color:var(--color-text)}.nav-brand{font-family:var(--font-kanji);margin-right:auto;font-size:1.5rem;font-weight:700;color:var(--color-accent)!important}#app{max-width:var(--max-width);padding:var(--spacing-lg) var(--spacing-md);margin:0 auto}.kanji{font-family:var(--font-kanji)}.btn{padding:var(--spacing-sm) var(--spacing-lg);border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);cursor:pointer;justify-content:center;align-items:center;font-size:.95rem;text-decoration:none;display:inline-flex}.btn:hover{border-color:var(--color-text)}.btn-accent{background:var(--color-accent);border-color:var(--color-accent);color:#fff}.btn-accent:hover{background:var(--color-accent-hover);border-color:var(--color-accent-hover)}.home{text-align:center;padding-top:var(--spacing-xl);flex-direction:column;align-items:center;display:flex}.browse{padding-bottom:200px}.filter-bar{gap:var(--spacing-xs);-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:2px;display:flex;overflow-x:auto}.filter-bar::-webkit-scrollbar{display:none}.chip{padding:6px var(--spacing-md);border:1px solid var(--color-border);color:var(--color-text-muted);cursor:pointer;white-space:nowrap;background:0 0;border-radius:20px;flex-shrink:0;font-size:.85rem}.chip:hover{border-color:var(--color-text);color:var(--color-text)}.chip-active{background:var(--color-accent);border-color:var(--color-accent);color:#fff}.search-bar{margin-top:var(--spacing-md)}.search-input{width:100%;padding:8px var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);font-size:.9rem;font-family:var(--font-sans);outline:none}.search-input::placeholder{color:var(--color-text-muted)}.search-input:focus{border-color:var(--color-accent)}.browse-toolbar{margin-top:var(--spacing-md);justify-content:space-between;align-items:center;gap:var(--spacing-md);display:flex}.browse-count{color:var(--color-text-muted);white-space:nowrap;font-size:.85rem}.sort-group{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);flex-shrink:0;gap:2px;padding:2px;display:flex}.sort-btn{padding:4px var(--spacing-sm);color:var(--color-text-muted);border-radius:calc(var(--radius) - 2px);cursor:pointer;white-space:nowrap;background:0 0;border:none;font-size:.8rem}.sort-btn:hover{color:var(--color-text)}.sort-btn-active{background:var(--color-bg);color:var(--color-text);font-weight:500;box-shadow:0 1px 2px #0000001a}.kanji-grid{gap:var(--spacing-xs);margin-top:var(--spacing-md);grid-template-columns:repeat(auto-fill,minmax(72px,1fr));display:grid}.browse-status{text-align:center;color:var(--color-text-muted);padding:var(--spacing-xl) 0;grid-column:1/-1;font-size:.9rem}.kanji-card{aspect-ratio:1;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);cursor:pointer;padding:var(--spacing-xs);flex-direction:column;justify-content:center;align-items:center;gap:2px;transition:border-color .1s;display:flex;position:relative;overflow:hidden}.kanji-card--due:after,.kanji-card--known:after{content:"";pointer-events:none;border-radius:50%;width:5px;height:5px;position:absolute;top:4px;right:4px}.kanji-card--due:after{background:var(--color-warn)}.kanji-card--known:after{background:var(--color-success)}.kanji-card:hover,.kanji-card:focus-visible{border-color:var(--color-accent);outline:none}.kanji-card-active{background:var(--color-accent);border-color:var(--color-accent)}.kanji-card-active .kanji{color:#fff}.kanji-card-active .kanji-card-meaning{color:#fffc}.kanji-card .kanji{font-size:1.6rem;line-height:1}.kanji-card-meaning{color:var(--color-text-muted);text-overflow:ellipsis;white-space:nowrap;text-align:center;max-width:100%;font-size:.5rem;overflow:hidden}.detail-drawer{background:var(--color-surface);border-top:2px solid var(--color-border);z-index:50;max-height:55vh;transition:transform .2s;position:fixed;bottom:0;left:0;right:0;overflow-y:auto;transform:translateY(100%)}.detail-drawer-open{transform:translateY(0)}.detail-inner{max-width:var(--max-width);padding:var(--spacing-md);padding-right:calc(var(--spacing-md) + 40px);margin:0 auto;position:relative}.detail-close{top:var(--spacing-md);right:var(--spacing-md);border:1px solid var(--color-border);background:var(--color-bg);width:32px;height:32px;color:var(--color-text-muted);cursor:pointer;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.8rem;display:flex;position:absolute}.detail-close:hover{color:var(--color-text);border-color:var(--color-text)}.detail-header{align-items:center;gap:var(--spacing-md);margin-bottom:var(--spacing-sm);flex-wrap:wrap;display:flex}.detail-char{font-size:3rem;line-height:1}.detail-tags{gap:var(--spacing-xs);flex-wrap:wrap;display:flex}.tag{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius);color:var(--color-text-muted);padding:2px 6px;font-size:.75rem;display:inline-block}.detail-meanings{margin-bottom:var(--spacing-sm);color:var(--color-text);font-size:.95rem}.detail-readings{flex-direction:column;gap:4px;display:flex}.reading-row{gap:var(--spacing-sm);align-items:baseline;font-size:.9rem;display:flex}.reading-label{color:var(--color-text-muted);min-width:2.5rem;font-size:.75rem;font-family:var(--font-sans)}.detail-more-link{margin-top:var(--spacing-md);color:var(--color-accent);font-size:.85rem;text-decoration:none;display:inline-block}.detail-more-link:hover{text-decoration:underline}.kanji-detail{max-width:640px}.back-link{color:var(--color-text-muted);margin-bottom:var(--spacing-lg);font-size:.85rem;text-decoration:none;display:inline-block}.back-link:hover{color:var(--color-text)}.kanji-detail-hero{align-items:flex-start;gap:var(--spacing-lg);margin-bottom:var(--spacing-xl);display:flex}.kanji-detail-char{flex-shrink:0;font-size:6rem;line-height:1}.kanji-detail-meta{gap:var(--spacing-sm);padding-top:var(--spacing-xs);flex-direction:column;display:flex}.resource-section-title{text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);margin-bottom:var(--spacing-md);font-size:.8rem;font-weight:600}.resource-grid{gap:var(--spacing-sm);grid-template-columns:repeat(auto-fill,minmax(200px,1fr));display:grid}.resource-card{padding:var(--spacing-md);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);flex-direction:column;gap:4px;text-decoration:none;transition:border-color .1s;display:flex}.resource-card:hover{border-color:var(--color-accent)}.resource-name{color:var(--color-text);font-size:.95rem;font-weight:600}.resource-desc{color:var(--color-text-muted);font-size:.8rem;line-height:1.4}.drill-setup{max-width:480px;margin:0 auto}.drill-setup h2,.setup-group{margin-bottom:var(--spacing-lg)}.setup-label{text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted);margin-bottom:var(--spacing-sm);font-size:.8rem;font-weight:600}.setup-mode-cards{gap:var(--spacing-sm);grid-template-columns:1fr 1fr;display:grid}.setup-mode-card{align-items:center;gap:var(--spacing-xs);padding:var(--spacing-md);border:2px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);color:var(--color-text);cursor:pointer;text-align:center;flex-direction:column;transition:border-color .15s;display:flex}.setup-mode-card:hover{border-color:var(--color-text-muted)}.setup-mode-card.selected{border-color:var(--color-accent);background:var(--color-accent);color:#fff}.setup-mode-card.selected span:last-of-type{color:#ffffffbf}.setup-mode-icon{font-size:2rem;line-height:1}.setup-mode-card strong{font-size:.95rem}.setup-mode-card span:last-of-type{color:var(--color-text-muted);font-size:.8rem}.setup-start{width:100%;margin-top:var(--spacing-sm);padding:.75rem;font-size:1rem}.setup-msg{margin-top:var(--spacing-sm);color:var(--color-text-muted);text-align:center;min-height:1.2em;font-size:.85rem}.drill-session{align-items:center;gap:var(--spacing-md);flex-direction:column;max-width:480px;margin:0 auto;display:flex}.drill-progress{width:100%}.drill-progress-bar{background:var(--color-border);width:100%;height:5px;margin-bottom:var(--spacing-xs);border-radius:3px;overflow:hidden}.drill-progress-fill{background:var(--color-accent);border-radius:3px;height:100%;transition:width .35s}.drill-progress-meta{color:var(--color-text-muted);justify-content:space-between;align-items:center;font-size:.8rem;display:flex}.drill-badge{letter-spacing:.06em;border-radius:3px;padding:2px 6px;font-size:.68rem;font-weight:700}.badge-new{color:#fff;background:#2563eb}.badge-review{background:var(--color-text-muted);color:#fff}.drill-card-wrapper{perspective:1200px;align-items:center;gap:var(--spacing-xs);flex-direction:column;width:100%;display:flex}.drill-card{cursor:pointer;width:100%;max-width:420px}.drill-card-inner{width:100%;height:280px;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.4,0,.2,1);position:relative}.drill-card.flipped .drill-card-inner{transform:rotateY(180deg)}.drill-card-front,.drill-card-back{backface-visibility:hidden;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:var(--spacing-lg);justify-content:center;align-items:center;gap:var(--spacing-sm);flex-direction:column;display:flex;position:absolute;inset:0;overflow:hidden}.drill-card-back{transform:rotateY(180deg)}.drill-card-hint{color:var(--color-text-muted);opacity:.6;font-size:.75rem}.drill-kanji{font-size:5.5rem;line-height:1}.drill-keyword{text-align:center;font-size:2rem;font-weight:700;line-height:1.2}.drill-prompt{text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-muted);font-size:.8rem}.drill-meaning-primary{text-align:center;font-size:1.6rem;font-weight:600}.drill-meaning-alt,.drill-meanings{color:var(--color-text-muted);text-align:center;font-size:.9rem}.drill-readings{gap:var(--spacing-md);flex-wrap:wrap;justify-content:center;display:flex}.drill-reading-group{align-items:center;gap:4px;font-size:.9rem;display:flex}.drill-reading-label{text-transform:uppercase;color:var(--color-text-muted);background:var(--color-bg);border:1px solid var(--color-border);border-radius:3px;padding:1px 4px;font-size:.68rem;font-weight:600}.drill-controls{justify-content:center;width:100%;max-width:420px;display:flex}.drill-show-btn{width:100%;padding:.75rem;font-size:1rem}.drill-ratings{gap:var(--spacing-sm);width:100%;max-width:420px;display:flex}.rating-btn{padding:.6rem var(--spacing-xs);border:none;flex:1;font-size:.9rem}.rating-again{color:#fff;background:#dc2626}.rating-again:hover{background:#b91c1c;border-color:#b91c1c}.rating-hard{color:#fff;background:#d97706}.rating-hard:hover{background:#b45309;border-color:#b45309}.rating-good{color:#fff;background:#16a34a}.rating-good:hover{background:#15803d;border-color:#15803d}.rating-easy{color:#fff;background:#2563eb}.rating-easy:hover{background:#1d4ed8;border-color:#1d4ed8}.drill-summary{text-align:center;max-width:480px;margin:0 auto}.drill-summary h2{margin-bottom:var(--spacing-lg)}.summary-highlights{gap:var(--spacing-sm);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:var(--spacing-md);margin-bottom:var(--spacing-lg);grid-template-columns:repeat(3,1fr);display:grid}.summary-highlight{flex-direction:column;align-items:center;gap:2px;display:flex}.highlight-value{color:var(--color-accent);font-size:2rem;font-weight:700;line-height:1}.highlight-label{color:var(--color-text-muted);font-size:.75rem}.summary-breakdown{gap:var(--spacing-sm);text-align:left;margin-bottom:var(--spacing-lg);flex-direction:column;display:flex}.breakdown-row{align-items:center;gap:var(--spacing-sm);display:flex}.breakdown-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px}.dot-again{background:#dc2626}.dot-hard{background:#d97706}.dot-good{background:#16a34a}.dot-easy{background:#2563eb}.breakdown-label{min-width:38px;font-size:.85rem}.breakdown-bar-wrap{background:var(--color-border);border-radius:4px;flex:1;height:8px;overflow:hidden}.breakdown-bar{border-radius:4px;min-width:0;height:100%;transition:width .5s;display:block}.bar-again{background:#dc2626}.bar-hard{background:#d97706}.bar-good{background:#16a34a}.bar-easy{background:#2563eb}.breakdown-count{text-align:right;min-width:20px;color:var(--color-text-muted);font-size:.85rem}.summary-actions{gap:var(--spacing-md);justify-content:center;display:flex}.summary-actions .btn{min-width:120px}.srs-section{margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid var(--color-border)}.srs-row{align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-md);flex-wrap:wrap;display:flex}.tag--due{border-color:var(--color-warn);color:var(--color-warn)}.tag--known{border-color:var(--color-success);color:var(--color-success)}.srs-detail{color:var(--color-text-muted);font-size:.85rem}.srs-unseen{color:var(--color-text-muted);margin-bottom:var(--spacing-md);font-size:.9rem}.srs-forget-btn{padding:var(--spacing-xs) var(--spacing-md);font-size:.85rem}.srs-confirm-text{margin-bottom:var(--spacing-sm);font-size:.9rem}.srs-confirm-actions{gap:var(--spacing-sm);display:flex}.btn-danger{color:#fff;background:#dc2626;border-color:#dc2626}.btn-danger:hover{background:#b91c1c;border-color:#b91c1c}.settings h2{margin-bottom:var(--spacing-lg)}.settings-group{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);max-width:560px;overflow:hidden}.settings-group-title{text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-muted);padding:var(--spacing-sm) var(--spacing-md);border-bottom:1px solid var(--color-border);background:var(--color-bg);font-size:.75rem;font-weight:600}.settings-row{align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);justify-content:space-between;display:flex}.settings-row-label{margin-bottom:2px;font-size:.95rem;font-weight:500}.settings-row-desc{color:var(--color-text-muted);font-size:.8rem}.settings-confirm{align-items:center;gap:var(--spacing-sm);flex-wrap:wrap;display:flex}.settings-confirm-text{color:var(--color-text-muted);white-space:nowrap;font-size:.85rem}