:root{color-scheme:light;--canvas: #f3f7f5;--surface: #fcfdfc;--surface-raised: #fff;--ink: #17312f;--muted: #526d67;--line: #cddad5;--accent: #147765;--accent-hover: #0b6858;--accent-contrast: #fff;--soft-accent: #d9ebe4;--success: #276d4d;--warning: #8c4c0c;--danger: #a23a35;--shadow: 0 18px 56px rgba(28, 70, 64, .09), 0 2px 8px rgba(28, 70, 64, .06);--display: "Iowan Old Style", "Noto Serif CJK SC", "Yu Mincho", "Songti SC", Georgia, serif;--ui: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", sans-serif}:root[data-theme=dark]{color-scheme:dark;--canvas: #102927;--surface: #173432;--surface-raised: #1c3b38;--ink: #f2f8f5;--muted: #aac1ba;--line: #3b5c57;--accent: #65c4ae;--accent-hover: #7cd1bd;--accent-contrast: #102927;--soft-accent: #244c45;--success: #82c9a2;--warning: #f1af68;--danger: #f19891;--shadow: 0 24px 70px rgba(0, 0, 0, .25), 0 2px 8px rgba(0, 0, 0, .22)}*{box-sizing:border-box}html{min-width:320px;background:var(--canvas);scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--canvas);color:var(--ink);font:16px/1.55 var(--ui);text-rendering:optimizeLegibility}button,input,textarea,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:var(--accent);text-underline-offset:.2em}img{max-width:100%}.skip-link{position:fixed;left:16px;top:-80px;z-index:100;padding:12px 16px;background:var(--ink);color:var(--canvas);border-radius:10px}.skip-link:focus{top:16px}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.app-shell{min-height:100vh}.site-header{max-width:1240px;margin:0 auto;padding:max(18px,env(safe-area-inset-top)) clamp(18px,4vw,48px) 16px;display:flex;align-items:center;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:700 20px/1 var(--display);letter-spacing:-.02em}.brand-mark{width:35px;height:35px}.primary-nav{display:flex;align-items:center;gap:5px;margin-left:auto}.nav-link{min-height:44px;padding:10px 14px;display:inline-grid;place-items:center;border-radius:99px;color:var(--muted);font-weight:650;text-decoration:none}.nav-link:hover,.nav-link[aria-current=page]{color:var(--ink);background:var(--soft-accent)}.icon-button{width:44px;height:44px;display:inline-grid;place-items:center;border:1px solid transparent;border-radius:50%;background:transparent;cursor:pointer}.icon-button:hover{background:var(--soft-accent)}.icon-button svg{width:20px}main{width:min(1160px,calc(100% - 36px));margin:0 auto;padding:clamp(36px,6vw,78px) 0 max(72px,env(safe-area-inset-bottom))}h1,h2,h3,p{margin-top:0}h1{max-width:830px;margin-bottom:20px;font:500 clamp(2.5rem,7vw,4.9rem)/.98 var(--display);letter-spacing:-.045em}h2{margin-bottom:16px;font:600 clamp(1.65rem,3vw,2.3rem)/1.12 var(--display);letter-spacing:-.025em}h3{margin-bottom:8px;font:700 1.08rem/1.3 var(--ui)}.eyebrow{margin-bottom:12px;color:var(--accent);font-size:.82rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.lede{max-width:680px;margin-bottom:32px;color:var(--muted);font-size:clamp(1.05rem,2vw,1.23rem)}.muted{color:var(--muted)}.tiny{color:var(--muted);font-size:.83rem}.mono-count{font-variant-numeric:tabular-nums}.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);align-items:center;gap:clamp(32px,7vw,88px)}.hero-copy{padding:16px 0}.hero-art{position:relative}.hero-art:before{content:"";position:absolute;inset:7% -3% -4% 8%;border:1px solid var(--line);border-radius:44% 56% 42% 58%/52% 44% 56% 48%;transform:rotate(-2deg)}.hero-art img{position:relative;display:block;aspect-ratio:3/2;width:100%;object-fit:cover;border-radius:42% 58% 46% 54%/50% 43% 57% 50%;filter:saturate(.83);box-shadow:var(--shadow)}.hero-actions,.toolbar,.form-actions,.review-actions,.settings-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.button{min-height:46px;padding:11px 18px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:13px;background:var(--surface);color:var(--ink);cursor:pointer;font-weight:750;text-decoration:none;transition:transform .16s ease,background-color .16s ease,border-color .16s ease}.button:hover{border-color:var(--accent);background:var(--soft-accent)}.button:active{transform:translateY(1px)}.button.primary{border-color:var(--accent);background:var(--accent);color:var(--accent-contrast)}.button.primary:hover{background:var(--accent-hover)}.button.danger{color:var(--danger)}.button.quiet{border-color:transparent;background:transparent}.button.small{min-height:44px;padding:9px 13px;font-size:.9rem}.button svg{width:18px;height:18px}.feature-river{margin-top:clamp(52px,9vw,100px);display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature{padding-top:20px;border-top:1px solid var(--line)}.feature-number{color:var(--accent);font:600 1.5rem/1 var(--display)}.feature p{max-width:30ch;color:var(--muted)}.page-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:36px}.page-head h1{margin-bottom:10px;font-size:clamp(2.5rem,6vw,4.2rem)}.page-head p{margin-bottom:0}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:16px}.word-card{position:relative;min-height:226px;padding:24px;border:1px solid var(--line);border-radius:26px 34px 28px 30px;background:var(--surface);box-shadow:0 1px #ffffff59 inset;display:flex;flex-direction:column}.word-card:nth-child(3n+2){border-radius:34px 25px 31px 28px}.word-card .glyph{margin:3px 0 2px;font:500 clamp(2.3rem,5vw,3.5rem)/1.15 var(--display);overflow-wrap:anywhere}.word-card .reading{color:var(--accent);font-weight:750}.word-card .meaning{margin:13px 0 0;font-size:1.05rem}.word-card .example{margin:auto 0 0;padding-top:22px;color:var(--muted)}.card-menu{position:absolute;top:14px;right:14px}.empty-panel{max-width:680px;margin:36px auto 0;text-align:center}.empty-panel img{width:min(520px,100%);aspect-ratio:3/2;object-fit:cover;border-radius:45% 55% 48% 52%/52% 42% 58% 48%;box-shadow:var(--shadow)}.empty-panel h2{margin-top:30px}.empty-panel p{max-width:530px;margin:0 auto 24px;color:var(--muted)}.dialog-backdrop{position:fixed;inset:0;z-index:50;padding:20px;display:grid;place-items:center;background:#081f1da3;backdrop-filter:blur(5px)}.dialog{width:min(690px,100%);max-height:min(860px,calc(100vh - 40px));overflow-y:auto;padding:clamp(24px,5vw,40px);border:1px solid var(--line);border-radius:32px 25px 30px 27px;background:var(--surface);box-shadow:var(--shadow)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}.dialog-head h2{margin:0}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field{margin-bottom:18px}.field.full{grid-column:1 / -1}label,legend{display:block;margin-bottom:7px;font-size:.9rem;font-weight:750}.optional{color:var(--muted);font-weight:500}input,textarea,select{width:100%;min-height:48px;padding:11px 13px;border:1px solid var(--line);border-radius:12px;background:var(--surface-raised);color:var(--ink)}textarea{min-height:88px;resize:vertical}input::placeholder,textarea::placeholder{color:var(--muted);opacity:.82}.field-hint{margin:6px 0 0;color:var(--muted);font-size:.83rem}.form-error{min-height:24px;margin:0 0 8px;color:var(--danger);font-weight:650}.form-actions{justify-content:flex-end}.record-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.recording{color:var(--danger);font-weight:750}.mode-shell{display:grid;grid-template-columns:230px minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:start}.mode-rail{position:sticky;top:20px}.mode-rail h2{font:700 .9rem/1.3 var(--ui);letter-spacing:.08em;text-transform:uppercase}.segmented{display:grid;gap:8px}.mode-button{width:100%;min-height:52px;padding:10px 13px;display:flex;align-items:center;gap:12px;border:1px solid transparent;border-radius:14px;background:transparent;color:var(--muted);text-align:left;cursor:pointer;font-weight:700}.mode-button:hover{background:var(--soft-accent);color:var(--ink)}.mode-button[aria-pressed=true]{border-color:var(--accent);background:var(--soft-accent);color:var(--ink)}.key{min-width:25px;padding:2px 6px;border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;font-size:.74rem;text-align:center}.practice-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}.progress{display:flex;align-items:center;gap:10px;color:var(--muted);font-variant-numeric:tabular-nums}.progress-track{width:100px;height:5px;overflow:hidden;border-radius:99px;background:var(--line)}.progress-bar{height:100%;background:var(--accent);transition:width .24s ease}.study-card{min-height:min(590px,calc(100vh - 260px));padding:clamp(30px,7vw,74px);display:grid;grid-template-rows:1fr auto;border:1px solid var(--line);border-radius:42px 31px 48px 35px;background:var(--surface);box-shadow:var(--shadow)}.layers{display:grid;align-content:center;text-align:center}.layer{padding:16px 10px}.layer+.layer{border-top:1px solid var(--line)}.layer-label{display:block;margin-bottom:7px;color:var(--muted);font-size:.76rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.study-glyph{font:500 clamp(3.4rem,10vw,7.4rem)/1.08 var(--display);overflow-wrap:anywhere}.study-reading{color:var(--accent);font-size:clamp(1.3rem,3vw,1.7rem);font-weight:750}.study-meaning{font-size:clamp(1.25rem,3vw,1.65rem)}.hidden-layer{min-height:94px;display:grid;place-items:center}.hidden-chip{min-height:46px;padding:10px 16px;border:1px dashed var(--accent);border-radius:13px;background:var(--soft-accent);color:var(--ink);cursor:pointer;font-weight:750}.example-block{margin-top:25px;color:var(--muted);font-family:var(--display);font-size:1.08rem}ruby rt{color:var(--accent);font:650 .55em var(--ui)}.study-footer{padding-top:30px}.reveal-button{width:100%;min-height:54px}.review-actions{justify-content:center}.review-actions .button{flex:1;max-width:240px}.audio-button{margin:10px auto 0}.completion{min-height:500px;display:grid;place-items:center;text-align:center}.completion-mark{width:78px;height:78px;margin:0 auto 24px;display:grid;place-items:center;border-radius:45% 55% 48% 52%;background:var(--soft-accent);color:var(--success);font-size:2rem}.settings-layout{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:24px}.settings-section{padding:clamp(24px,4vw,36px);border:1px solid var(--line);border-radius:28px 34px 30px 26px;background:var(--surface)}.settings-section+.settings-section{margin-top:24px}.settings-section p{color:var(--muted)}.theme-options{display:flex;flex-wrap:wrap;gap:10px}.theme-choice{position:relative}.theme-choice input{position:absolute;opacity:0;width:1px;height:1px}.theme-choice span{min-height:46px;padding:11px 16px;display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:13px;cursor:pointer;font-weight:700}.theme-choice input:checked+span{border-color:var(--accent);background:var(--soft-accent)}.theme-choice input:focus-visible+span{outline:3px solid var(--accent);outline-offset:3px}.supporter{background:color-mix(in srgb,var(--soft-accent) 45%,var(--surface))}.price{color:var(--ink);font:600 2rem/1 var(--display)}.license-status{padding:10px 0;color:var(--success);font-weight:750}.import-label{position:relative;overflow:hidden}.import-label input{position:absolute;opacity:0;inset:0;cursor:pointer}.danger-zone{border-color:color-mix(in srgb,var(--danger) 45%,var(--line))}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat{padding:18px;border-radius:18px;background:var(--canvas)}.stat strong{display:block;font:600 1.8rem/1.15 var(--display);font-variant-numeric:tabular-nums}.legal{max-width:720px}.legal h1{font-size:clamp(2.7rem,6vw,4rem)}.legal h2{margin-top:36px;font-size:1.55rem}.legal p,.legal li{color:var(--muted)}.site-footer{max-width:1160px;margin:0 auto;padding:24px 18px max(30px,env(safe-area-inset-bottom));display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.84rem}.footer-links{display:flex;flex-wrap:wrap;gap:18px}.footer-links a{color:var(--muted)}.toast-region{position:fixed;z-index:80;right:18px;bottom:max(18px,env(safe-area-inset-bottom));width:min(360px,calc(100% - 36px))}.toast{padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--line);border-radius:16px;background:var(--ink);color:var(--canvas);box-shadow:var(--shadow)}.toast button{color:inherit}.offline-banner{padding:8px 18px;background:#8c4c0c;color:#fff;text-align:center;font-size:.88rem;font-weight:750}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:760px){.site-header{padding-inline:18px;flex-wrap:wrap}.primary-nav{order:3;width:100%;justify-content:space-between;border-top:1px solid var(--line);padding-top:8px}.nav-link{flex:1;padding-inline:8px}.theme-toggle{margin-left:auto}main{padding-top:36px}.hero{grid-template-columns:1fr}.hero-art{order:-1}.hero-art img{max-height:320px}.feature-river{grid-template-columns:1fr}.page-head{align-items:start;flex-direction:column}.field-grid,.mode-shell{grid-template-columns:1fr}.mode-rail{position:static}.mode-rail h2{margin-bottom:8px}.segmented{grid-template-columns:repeat(3,1fr);gap:6px}.mode-button{min-height:58px;flex-direction:column;justify-content:center;gap:2px;padding:5px;text-align:center;font-size:.78rem}.key{display:none}.study-card{min-height:480px;padding:30px 20px;border-radius:28px 23px 31px 25px}.settings-layout{grid-template-columns:1fr}.site-footer{margin-inline:18px}}@media(max-width:420px){.brand{font-size:18px}.hero-art{display:none}.hero{min-height:56vh}.toolbar .button{flex:1}.library-grid{grid-template-columns:1fr}.study-glyph{font-size:clamp(3rem,19vw,5rem)}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}