:root{--md-sys-color-primary:#0b57d0;--md-sys-color-on-primary:#fff;--md-sys-color-primary-container:#d3e3fd;--md-sys-color-on-primary-container:#041e49;--md-sys-color-secondary:#00639b;--md-sys-color-on-secondary:#fff;--md-sys-color-secondary-container:#c2e7ff;--md-sys-color-on-secondary-container:#001d35;--md-sys-color-tertiary:#6e5676;--md-sys-color-on-tertiary:#fff;--md-sys-color-tertiary-container:#f7d8ff;--md-sys-color-on-tertiary-container:#271430;--md-sys-color-surface:#f8f9fa;--md-sys-color-surface-dim:#ded8e1;--md-sys-color-surface-bright:#fdfcff;--md-sys-color-surface-container-lowest:#fff;--md-sys-color-surface-container-low:#f3f4f8;--md-sys-color-surface-container:#edf0f7;--md-sys-color-surface-container-high:#e7ecf4;--md-sys-color-surface-container-highest:#e1e7f0;--md-sys-color-on-surface:#1f1f1f;--md-sys-color-on-surface-variant:#444746;--md-sys-color-outline:#747775;--md-sys-color-outline-variant:#c4c7c5;--md-sys-color-outline-subtle:#e0e2e0;--md-sys-color-error:#ba1a1a;--md-sys-color-on-error:#fff;--md-sys-color-error-container:#ffdad6;--md-sys-color-on-error-container:#410002;--md-sys-color-inverse-surface:#303030;--md-sys-color-inverse-on-surface:#f2f2f2;--md-sys-color-inverse-primary:#a8c7fa;--md-sys-state-hover-opacity:.08;--md-sys-state-focus-opacity:.12;--md-sys-state-pressed-opacity:.12;--md-sys-state-dragged-opacity:.16;--md-sys-shape-corner-none:0px;--md-sys-shape-corner-extra-small:4px;--md-sys-shape-corner-small:8px;--md-sys-shape-corner-medium:12px;--md-sys-shape-corner-large:16px;--md-sys-shape-corner-extra-large:28px;--md-sys-shape-corner-full:9999px;--md-sys-elevation-0:none;--md-sys-elevation-1:0px 1px 3px 1px #0000001f, 0px 1px 2px 0px #0000002e;--md-sys-elevation-2:0px 2px 6px 2px #0000001f, 0px 1px 2px 0px #0003;--md-sys-elevation-3:0px 4px 8px 3px #0000001f, 0px 1px 3px 0px #00000038;--md-sys-elevation-4:0px 6px 10px 4px #0000001f, 0px 2px 3px 0px #0000003d;--md-sys-elevation-5:0px 8px 12px 6px #0000001f, 0px 4px 4px 0px #00000040;--md-sys-typescale-font-brand:"Google Sans", "Roboto", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--md-sys-typescale-font-plain:"Roboto", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--md-sys-typescale-font-character:"Noto Serif SC", "Songti SC", "STSong", "Noto Sans SC", serif;--md-sys-motion-easing-standard:cubic-bezier(.2, 0, 0, 1);--md-sys-motion-easing-emphasized:cubic-bezier(.2, 0, 0, 1);--md-sys-motion-easing-decelerate:cubic-bezier(.05, .7, .1, 1);--md-sys-motion-duration-short:.15s;--md-sys-motion-duration-medium:.3s;--md-sys-motion-duration-long:.5s}@media (prefers-color-scheme:dark){:root{--md-sys-color-primary:#a8c7fa;--md-sys-color-on-primary:#062e6f;--md-sys-color-primary-container:#0842a0;--md-sys-color-on-primary-container:#d3e3fd;--md-sys-color-secondary:#7fcfff;--md-sys-color-on-secondary:#003353;--md-sys-color-secondary-container:#004a75;--md-sys-color-on-secondary-container:#c2e7ff;--md-sys-color-tertiary:#dfbbde;--md-sys-color-on-tertiary:#3e2846;--md-sys-color-tertiary-container:#553e5d;--md-sys-color-on-tertiary-container:#f7d8ff;--md-sys-color-surface:#131314;--md-sys-color-surface-dim:#131314;--md-sys-color-surface-bright:#37393e;--md-sys-color-surface-container-lowest:#0e0e0f;--md-sys-color-surface-container-low:#1a1b1e;--md-sys-color-surface-container:#1e1f20;--md-sys-color-surface-container-high:#28292c;--md-sys-color-surface-container-highest:#333438;--md-sys-color-on-surface:#e3e3e3;--md-sys-color-on-surface-variant:#c4c7c5;--md-sys-color-outline:#8e918f;--md-sys-color-outline-variant:#444746;--md-sys-color-outline-subtle:#2d3034;--md-sys-color-error:#f2b8b5;--md-sys-color-on-error:#601410;--md-sys-color-error-container:#8c1d18;--md-sys-color-on-error-container:#f9dedc;--md-sys-color-inverse-surface:#e3e3e3;--md-sys-color-inverse-on-surface:#1f1f1f;--md-sys-color-inverse-primary:#0b57d0;--md-sys-elevation-1:0px 1px 3px 1px #0006, 0px 1px 2px 0px #00000080;--md-sys-elevation-2:0px 2px 6px 2px #00000073, 0px 1px 2px 0px #0000008c;--md-sys-elevation-3:0px 4px 8px 3px #00000080, 0px 1px 3px 0px #0009;--md-sys-elevation-4:0px 6px 10px 4px #0000008c, 0px 2px 3px 0px #000000a6;--md-sys-elevation-5:0px 8px 12px 6px #0009, 0px 4px 4px 0px #000000b3}}*,:before,:after{box-sizing:border-box}html,body{min-height:100%;font-family:var(--md-sys-typescale-font-plain);background-color:var(--md-sys-color-surface);color:var(--md-sys-color-on-surface);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;margin:0;padding:0}#root{flex-direction:column;min-height:100vh;display:flex}button{cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;background:0 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var(--md-sys-motion-duration-short) ease, transform var(--md-sys-motion-duration-short) ease;justify-content:center;align-items:center;gap:12px;padding:0 28px;font-size:15px;font-weight:500;display:inline-flex;position:relative;overflow:hidden}.m3-signin-btn:after{content:"";border-radius:inherit;background-color:var(--md-sys-color-on-surface);opacity:0;transition:opacity var(--md-sys-motion-duration-short) ease;pointer-events:none;position:absolute;inset:0}.m3-signin-btn:hover:not(:disabled){background-color:var(--md-sys-color-surface-container-low);border-color:var(--md-sys-color-outline);box-shadow:var(--md-sys-elevation-2)}.m3-signin-btn:hover:not(:disabled):after{opacity:var(--md-sys-state-hover-opacity)}.m3-signin-btn:active:not(:disabled){box-shadow:var(--md-sys-elevation-1);transform:scale(.985)}.m3-signin-btn:active:not(:disabled):after{opacity:var(--md-sys-state-pressed-opacity)}.m3-signin-btn:focus-visible{outline:2px solid 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20px;font-size:14px;font-weight:500;display:inline-flex}.m3-filled-btn:hover:not(:disabled){box-shadow:var(--md-sys-elevation-2);filter:brightness(1.06)}.m3-filled-btn:active:not(:disabled){transform:scale(.98)}.m3-filled-btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.m3-outlined-btn{border-radius:var(--md-sys-shape-corner-full);border:1px solid var(--md-sys-color-outline-variant);height:40px;color:var(--md-sys-color-on-surface);font-family:var(--md-sys-typescale-font-brand);transition:all var(--md-sys-motion-duration-short) ease;background-color:#0000;justify-content:center;align-items:center;gap:8px;padding:0 18px;font-size:14px;font-weight:500;display:inline-flex}.m3-outlined-btn:hover:not(:disabled){background-color:var(--md-sys-color-surface-container-high);border-color:var(--md-sys-color-outline)}.m3-text-btn{border-radius:var(--md-sys-shape-corner-full);color:var(--md-sys-color-primary);font-family:var(--md-sys-typescale-font-brand);transition:background-color var(--md-sys-motion-duration-short) ease;align-items:center;gap:6px;padding:8px 12px;font-size:13px;font-weight:500;display:inline-flex}.m3-text-btn:hover{background-color:var(--md-sys-color-surface-container-highest)}.m3-danger-btn{border-radius:var(--md-sys-shape-corner-full);background-color:var(--md-sys-color-error-container);color:var(--md-sys-color-on-error-container);font-family:var(--md-sys-typescale-font-brand);transition:opacity var(--md-sys-motion-duration-short) ease;align-items:center;padding:6px 14px;font-size:12px;font-weight:500;display:inline-flex}.m3-danger-btn:hover{opacity:.9}.m3-back-btn{border-radius:var(--md-sys-shape-corner-full);width:38px;height:38px;color:var(--md-sys-color-on-surface-variant);transition:background-color var(--md-sys-motion-duration-short) ease;justify-content:center;align-items:center;display:inline-flex}.m3-back-btn:hover{background-color:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface)}.radical-learner-viewport{background-color:var(--md-sys-color-surface);background-image:radial-gradient(circle at 50% 40%, var(--md-sys-color-surface-container-low) 0%, var(--md-sys-color-surface) 75%);box-sizing:border-box;flex-direction:column;width:100%;min-height:100vh;display:flex}.learner-header{border-bottom:1px solid var(--md-sys-color-outline-subtle);background-color:var(--md-sys-color-surface-container);z-index:40;justify-content:space-between;align-items:center;height:64px;padding:0 24px;display:flex;position:sticky;top:0}.learner-header-left{align-items:center;gap:12px;display:flex}.learner-session-title{font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface);font-size:15px;font-weight:600}.learner-progress-wrap{flex:0 320px;align-items:center;gap:14px;display:flex}.learner-progress-bar{background-color:var(--md-sys-color-surface-container-highest);border-radius:var(--md-sys-shape-corner-full);flex:1;height:6px;overflow:hidden}.learner-progress-fill{background-color:var(--md-sys-color-primary);border-radius:var(--md-sys-shape-corner-full);height:100%;transition:width var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard)}.learner-progress-text{font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface-variant);white-space:nowrap;font-size:12px;font-weight:500}.learner-header-right{align-items:center;gap:8px;display:flex}.learner-icon-btn{border-radius:var(--md-sys-shape-corner-full);width:36px;height:36px;color:var(--md-sys-color-on-surface-variant);transition:all var(--md-sys-motion-duration-short) ease;justify-content:center;align-items:center;display:inline-flex}.learner-icon-btn:hover{background-color:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface)}.learner-icon-btn.active{color:var(--md-sys-color-primary);background-color:var(--md-sys-color-primary-container)}.learner-main-content{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:24px;width:100%;max-width:580px;margin:0 auto;padding:32px 20px 48px;display:flex}.radical-display-card{background-color:var(--md-sys-color-surface-container-low);border:1px solid var(--md-sys-color-outline-subtle);border-radius:var(--md-sys-shape-corner-extra-large);width:100%;box-shadow:var(--md-sys-elevation-1);transition:transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard), box-shadow var(--md-sys-motion-duration-medium) ease;flex-direction:column;align-items:center;padding:36px 32px 32px;display:flex;position:relative}.card-top-chips{justify-content:space-between;align-items:center;width:100%;margin-bottom:8px;display:flex}.srs-stage-pill{border-radius:var(--md-sys-shape-corner-full);font-family:var(--md-sys-typescale-font-brand);text-transform:uppercase;letter-spacing:.5px;border:1.5px solid;align-items:center;gap:6px;padding:4px 12px;font-size:11px;font-weight:600;display:inline-flex}.srs-dot{border-radius:50%;width:7px;height:7px}.category-pill{font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface-variant);font-size:12px;font-weight:500}.radical-hero-stage{cursor:pointer;outline:none;margin:12px 0 20px}.radical-hero-stage:focus-visible .character-glyph{color:var(--md-sys-color-primary);transform:scale(1.05)}.radical-glyph{font-size:clamp(120px,24vw,175px)!important}.pronounce-hint{border-radius:var(--md-sys-shape-corner-full);background-color:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant);font-size:11px;font-family:var(--md-sys-typescale-font-brand);opacity:0;transition:all var(--md-sys-motion-duration-short) ease;pointer-events:none;align-items:center;gap:4px;padding:3px 8px;font-weight:500;display:inline-flex;position:absolute;top:6px;right:-8px;transform:translateY(4px)}.radical-hero-stage:hover .pronounce-hint,.radical-hero-stage:focus-visible .pronounce-hint{opacity:1;transform:translateY(0)}.radical-variants-row{background-color:var(--md-sys-color-surface-container-high);border-radius:var(--md-sys-shape-corner-full);align-items:center;gap:8px;margin-bottom:16px;padding:4px 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solid var(--md-sys-color-outline-variant);border-radius:var(--md-sys-shape-corner-full);box-shadow:var(--md-sys-elevation-1);transition:all var(--md-sys-motion-duration-short) ease;align-items:center;padding:4px 6px 4px 18px;display:flex}.pinyin-input-box:focus-within{border-color:var(--md-sys-color-primary);box-shadow:0 0 0 3px var(--md-sys-color-primary-container)}.pinyin-input-box.input-success{background-color:#2e7d3214;border-color:#2e7d32;box-shadow:0 0 0 3px #2e7d3240}.pinyin-input-box.input-error{border-color:var(--md-sys-color-error);box-shadow:0 0 0 3px var(--md-sys-color-error-container)}.pinyin-native-input{font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface);letter-spacing:.2px;background:0 0;border:none;outline:none;flex:1;height:40px;font-size:16px;font-weight:500}.pinyin-native-input::placeholder{color:var(--md-sys-color-outline);font-size:14px;font-weight:400}.pinyin-submit-btn{border-radius:var(--md-sys-shape-corner-full);background-color:var(--md-sys-color-primary);width:36px;height:36px;color:var(--md-sys-color-on-primary);transition:all var(--md-sys-motion-duration-short) ease;justify-content:center;align-items:center;display:inline-flex}.pinyin-submit-btn:disabled{opacity:.35;background-color:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant);cursor:default}.pinyin-input-box.input-success .pinyin-submit-btn{color:#fff;background-color:#2e7d32}.typing-error-notice{color:var(--md-sys-color-error);text-align:center;font-size:13px;font-family:var(--md-sys-typescale-font-brand);margin-top:10px;animation:.2s fadeInNotice}@keyframes fadeInNotice{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.card-success-pulse{animation:.5s cardSuccessPulse}@keyframes cardSuccessPulse{0%{transform:scale(1)}40%{transform:scale(1.02)}to{transform:scale(1)}}.card-error-shake{animation:.4s cubic-bezier(.36,.07,.19,.97) both cardShake}@keyframes cardShake{10%,90%{transform:translate(-3px)}20%,80%{transform:translate(5px)}30%,50%,70%{transform:translate(-6px)}40%,60%{transform:translate(6px)}}.radical-extra-actions{align-items:center;gap:10px;margin-top:4px;display:flex}.extra-pill-btn{border-radius:var(--md-sys-shape-corner-full);background-color:var(--md-sys-color-surface-container-high);color:var(--md-sys-color-on-surface-variant);font-family:var(--md-sys-typescale-font-brand);transition:all var(--md-sys-motion-duration-short) ease;align-items:center;padding:6px 14px;font-size:12px;font-weight:500;display:inline-flex}.extra-pill-btn:hover{background-color:var(--md-sys-color-surface-container-highest);color:var(--md-sys-color-on-surface)}.extra-pill-btn.active{background-color:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.mnemonic-drawer,.examples-drawer{border-radius:var(--md-sys-shape-corner-medium);background-color:var(--md-sys-color-surface-container);border:1px solid var(--md-sys-color-outline-subtle);width:100%;margin-top:16px;padding:14px 18px;animation:.25s fadeInDrawer}@keyframes fadeInDrawer{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.mnemonic-text{color:var(--md-sys-color-on-surface-variant);text-align:center;margin:0;font-size:13.5px;line-height:1.5}.examples-list{justify-content:space-around;gap:12px;display:flex}.example-item{flex-direction:column;align-items:center;gap:2px;display:flex}.example-char{font-family:var(--md-sys-typescale-font-character);color:var(--md-sys-color-on-surface);font-size:24px;font-weight:700}.example-pinyin{color:var(--md-sys-color-primary);font-size:12px;font-weight:600}.example-meaning{color:var(--md-sys-color-on-surface-variant);font-size:11px}.learner-shortcuts-bar{color:var(--md-sys-color-on-surface-variant);align-items:center;gap:18px;font-size:12px;display:flex}.shortcut-item kbd{font-size:10.5px;font-family:var(--md-sys-typescale-font-brand);background-color:var(--md-sys-color-surface-container-high);border:1px solid var(--md-sys-color-outline-variant);color:var(--md-sys-color-on-surface);border-radius:4px;padding:2px 6px;display:inline-block;box-shadow:0 1px 1px #0000001a}.learner-summary-card{background-color:var(--md-sys-color-surface-container-low);border:1px solid var(--md-sys-color-outline-subtle);border-radius:var(--md-sys-shape-corner-extra-large);text-align:center;width:100%;max-width:480px;box-shadow:var(--md-sys-elevation-2);flex-direction:column;align-items:center;margin:auto;padding:44px 36px;display:flex}.summary-badge{border-radius:var(--md-sys-shape-corner-full);background-color:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container);align-items:center;gap:8px;margin-bottom:16px;padding:6px 16px;font-size:13px;font-weight:600;display:inline-flex}.summary-title{font-size:26px;font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface);margin:0 0 8px}.summary-subtitle{color:var(--md-sys-color-on-surface-variant);margin:0 0 28px;font-size:14px}.summary-stats-grid{grid-template-columns:repeat(3,1fr);gap:16px;width:100%;margin-bottom:32px;display:grid}.summary-stat-box{background-color:var(--md-sys-color-surface-container);border-radius:var(--md-sys-shape-corner-medium);flex-direction:column;align-items:center;gap:4px;padding:16px 8px;display:flex}.summary-stat-num{color:var(--md-sys-color-primary);font-size:24px;font-weight:700;font-family:var(--md-sys-typescale-font-brand)}.summary-stat-label{color:var(--md-sys-color-on-surface-variant);text-transform:uppercase;letter-spacing:.5px;font-size:11px;font-weight:500}.summary-actions{justify-content:center;gap:12px;width:100%;display:flex}.learner-empty-card{text-align:center;background-color:var(--md-sys-color-surface-container-low);border:1px solid var(--md-sys-color-outline-subtle);border-radius:var(--md-sys-shape-corner-extra-large);width:100%;max-width:440px;margin:auto;padding:40px 32px}.empty-icon{color:#fff;background-color:#2e7d32;border-radius:50%;justify-content:center;align-items:center;width:48px;height:48px;margin:0 auto 16px;font-size:24px;font-weight:700;display:flex}.radicals-overview-main{flex:1;justify-content:center;padding:36px 24px 60px;display:flex}.radicals-container{flex-direction:column;gap:32px;width:100%;max-width:1080px;display:flex}.srs-dashboard-card{background-color:var(--md-sys-color-surface-container-low);border:1px solid var(--md-sys-color-outline-subtle);border-radius:var(--md-sys-shape-corner-extra-large);box-shadow:var(--md-sys-elevation-1);padding:36px 36px 28px}.srs-card-header{justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:28px;display:flex}.srs-subhead-pill{background-color:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container);border-radius:var(--md-sys-shape-corner-full);text-transform:uppercase;letter-spacing:.6px;margin-bottom:12px;padding:4px 12px;font-size:11px;font-weight:600;display:inline-block}.srs-headline{color:var(--md-sys-color-on-surface);letter-spacing:-.4px;margin:0 0 8px;font-size:28px;font-weight:600}.srs-description{color:var(--md-sys-color-on-surface-variant);max-width:600px;margin:0;font-size:14.5px;line-height:1.5}.primary-start-btn{white-space:nowrap;height:48px;padding:0 28px;font-size:15px}.srs-metrics-grid{grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:24px;display:grid}.srs-metric-item{background-color:var(--md-sys-color-surface-container);border-radius:var(--md-sys-shape-corner-medium);flex-direction:column;gap:4px;padding:18px 20px;display:flex}.metric-val{color:var(--md-sys-color-on-surface);font-size:26px;font-weight:700;font-family:var(--md-sys-typescale-font-brand)}.metric-val.due-val{color:var(--md-sys-color-primary)}.metric-val.mastered-val{color:#ffa726}.metric-label{color:var(--md-sys-color-on-surface);font-size:13px;font-weight:500}.metric-sublabel{color:var(--md-sys-color-on-surface-variant);font-size:11.5px}.metric-bar{background-color:var(--md-sys-color-surface-container-highest);border-radius:2px;height:4px;margin-top:8px;overflow:hidden}.metric-bar-fill{background-color:var(--md-sys-color-primary);border-radius:2px;height:100%}.srs-stages-strip{border-top:1px solid var(--md-sys-color-outline-subtle);flex-wrap:wrap;align-items:center;gap:18px;padding-top:16px;display:flex}.stage-chip{color:var(--md-sys-color-on-surface-variant);align-items:center;gap:8px;font-size:12px;font-weight:500;display:inline-flex}.stage-chip .dot{border-radius:50%;width:8px;height:8px}.radicals-filter-bar{flex-direction:column;gap:16px;display:flex}.filter-tabs{border-bottom:1px solid var(--md-sys-color-outline-subtle);gap:8px;padding-bottom:2px;display:flex;overflow-x:auto}.filter-tab{font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface-variant);transition:all var(--md-sys-motion-duration-short) ease;white-space:nowrap;border-bottom:2px solid #0000;padding:8px 16px;font-size:13.5px;font-weight:500}.filter-tab:hover{color:var(--md-sys-color-on-surface)}.filter-tab.active{color:var(--md-sys-color-primary);border-bottom-color:var(--md-sys-color-primary)}.filter-controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.search-field-box{background-color:var(--md-sys-color-surface-container);border-radius:var(--md-sys-shape-corner-full);width:280px;height:40px;color:var(--md-sys-color-on-surface-variant);align-items:center;gap:10px;padding:0 16px;display:flex}.search-field-input{font-size:13.5px;font-family:var(--md-sys-typescale-font-brand);color:var(--md-sys-color-on-surface);background:0 0;border:none;outline:none;width:100%}.search-clear-btn{color:var(--md-sys-color-outline);cursor:pointer;font-size:18px}.category-scroll-chips{align-items:center;gap:8px;padding:2px 0;display:flex;overflow-x:auto}.cat-chip{border-radius:var(--md-sys-shape-corner-full);background-color:var(--md-sys-color-surface-container);border:1px solid var(--md-sys-color-outline-subtle);color:var(--md-sys-color-on-surface-variant);white-space:nowrap;transition:all var(--md-sys-motion-duration-short) ease;padding:6px 14px;font-size:12.5px;font-weight:500}.cat-chip:hover{background-color:var(--md-sys-color-surface-container-high)}.cat-chip.active{background-color:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container);border-color:#0000}.gallery-header-row{justify-content:space-between;align-items:center;display:flex}.gallery-count{color:var(--md-sys-color-on-surface-variant);font-size:13px;font-weight:500}.practice-selection-btn{font-size:13px;font-weight:600}.radicals-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:16px;display:grid}.radical-grid-card{background-color:var(--md-sys-color-surface-container-low);border:1px solid var(--md-sys-color-outline-subtle);border-radius:var(--md-sys-shape-corner-medium);text-align:center;cursor:pointer;transition:all var(--md-sys-motion-duration-short) ease;outline:none;flex-direction:column;align-items:center;padding:16px 12px 14px;display:flex;position:relative}.radical-grid-card:hover{background-color:var(--md-sys-color-surface-container);border-color:var(--md-sys-color-outline-variant);box-shadow:var(--md-sys-elevation-2);transform:translateY(-2px)}.radical-grid-card:focus-visible{outline:2px solid var(--md-sys-color-primary);outline-offset:2px}.radical-grid-card.is-due{border-color:var(--md-sys-color-primary)}.grid-card-status{justify-content:space-between;align-items:center;width:100%;margin-bottom:8px;display:flex}.srs-indicator-dot{border-radius:50%;width:8px;height:8px}.due-badge{text-transform:uppercase;color:var(--md-sys-color-primary);background-color:var(--md-sys-color-primary-container);border-radius:var(--md-sys-shape-corner-full);padding:1px 6px;font-size:10px;font-weight:600}.variant-tag{font-family:var(--md-sys-typescale-font-character);color:var(--md-sys-color-outline);font-size:12px}.grid-card-char{margin:6px 0 10px}.char-glyph{font-family:var(--md-sys-typescale-font-character);color:var(--md-sys-color-on-surface);transition:transform var(--md-sys-motion-duration-short) ease;font-size:44px;font-weight:700;line-height:1}.radical-grid-card:hover .char-glyph{color:var(--md-sys-color-primary);transform:scale(1.08)}.grid-card-info{flex-direction:column;gap:2px;width:100%;display:flex}.grid-pinyin{color:var(--md-sys-color-primary);font-size:13px;font-weight:600}.grid-meaning{color:var(--md-sys-color-on-surface-variant);white-space:nowrap;text-overflow:ellipsis;font-size:11.5px;overflow:hidden}.radicals-empty-state{text-align:center;color:var(--md-sys-color-on-surface-variant);flex-direction:column;align-items:center;gap:16px;padding:48px 20px;display:flex}.radicals-footer-options{justify-content:center;padding:24px 0;display:flex}.reset-progress-link{color:var(--md-sys-color-outline);cursor:pointer;transition:color var(--md-sys-motion-duration-short) ease;font-size:12px;text-decoration:underline}.reset-progress-link:hover{color:var(--md-sys-color-error)}.reset-confirm-box{border-radius:var(--md-sys-shape-corner-medium);background-color:var(--md-sys-color-surface-container);border:1px solid var(--md-sys-color-outline-subtle);flex-direction:column;align-items:center;gap:12px;padding:16px 24px;font-size:13px;display:flex}.reset-confirm-buttons{gap:10px;display:flex}@media (width<=768px){.srs-card-header{flex-direction:column}.srs-metrics-grid{grid-template-columns:repeat(2,1fr)}.filter-controls{flex-direction:column;align-items:stretch}.search-field-box{width:100%}.learner-progress-wrap{flex:0 180px}.radical-display-card{padding:28px 20px 24px}}