:root,:root[data-theme=light] .atom-visualizer,:root[data-theme=light] .expanded-atom-card{color-scheme:dark;--bg-dark: #050505;--bg-glow: rgba(20, 30, 50, .5);--panel: rgba(20, 20, 25, .95);--surface-0: rgba(255, 255, 255, .01);--surface-1: rgba(255, 255, 255, .02);--surface-2: rgba(255, 255, 255, .03);--surface-3: rgba(255, 255, 255, .05);--surface-4: rgba(255, 255, 255, .1);--surface-5: rgba(255, 255, 255, .15);--surface-6: rgba(255, 255, 255, .5);--surface-a04: rgba(255, 255, 255, .04);--surface-a08: rgba(255, 255, 255, .08);--surface-a20: rgba(255, 255, 255, .2);--card-bg: rgba(255, 255, 255, .03);--card-border: rgba(255, 255, 255, .1);--card-grad-a: #1a1a20;--card-grad-b: #0a0a10;--border-1: rgba(255, 255, 255, .1);--border-2: #333;--border-3: #444;--text-1: #fff;--text-main: #e0e0e0;--text-2: #e0e0e0;--text-2a: #ccc;--text-3: #bbb;--text-4: #aaa;--text-5: #888;--text-6: #666;--text-hub: #9fb0b8;--on-accent: #000;--accent-cyan: #00f3ff;--accent-pink: #ff00aa;--accent-a03: rgba(0, 243, 255, .03);--accent-a05: rgba(0, 243, 255, .05);--accent-a08: rgba(0, 243, 255, .08);--accent-a10: rgba(0, 243, 255, .1);--accent-a20: rgba(0, 243, 255, .2);--accent-a30: rgba(0, 243, 255, .3);--accent-a40: rgba(0, 243, 255, .4);--accent-a50: rgba(0, 243, 255, .5);--valence-color: #ff0055;--valence-text: #ff6699;--valence-bg: rgba(255, 0, 85, .1);--valence-bg-strong: rgba(255, 0, 85, .2);--valence-border: rgba(255, 0, 85, .3);--valence-border-strong: rgba(255, 0, 85, .4);--valence-grad-b: rgba(255, 0, 170, .1);--inner-color: #00a8ff;--isotope-text: #66ccff;--isotope-bg: rgba(0, 168, 255, .1);--isotope-border: rgba(0, 168, 255, .3);--stable-text: #66ff99;--stable-bg: rgba(0, 255, 136, .1);--stable-border: rgba(0, 255, 136, .3);--error-text: #ff6666;--error-border: rgba(255, 100, 100, .4);--danger: rgba(255, 0, 0, .8);--shadow-1: rgba(0, 0, 0, .2);--shadow-2: rgba(0, 0, 0, .3);--shadow-3: rgba(0, 0, 0, .5);--shadow-4: rgba(0, 0, 0, .8);--scrim: rgba(0, 0, 0, .9);--overlay-btn-bg: rgba(0, 0, 0, .6);--heat-ink: #fff;--heat-empty-bg: #222;--heat-empty-border: #444;--heat-empty-ink: #fff;--stage-grad-a: #0a0a15;--stage-grad-b: #151520;--stage-border: #333;--stage-scrim: rgba(0, 0, 0, .95);--stage-hint: rgba(255, 255, 255, .4);--stage-glow: rgba(0, 243, 255, .15);--stage-glow-inset: rgba(0, 243, 255, .02);--nucleus: #fff;--nucleus-glow: rgba(255, 255, 255, .5);--cat-mix: 100%}:root[data-theme=light]{color-scheme:light;--bg-dark: #eef2f5;--bg-glow: rgba(120, 170, 210, .22);--panel: rgba(255, 255, 255, .94);--surface-0: rgba(10, 25, 35, .012);--surface-1: rgba(10, 25, 35, .025);--surface-2: rgba(10, 25, 35, .04);--surface-3: rgba(10, 25, 35, .06);--surface-4: rgba(10, 25, 35, .1);--surface-5: rgba(10, 25, 35, .16);--surface-6: rgba(10, 25, 35, .45);--surface-a04: rgba(10, 25, 35, .05);--surface-a08: rgba(10, 25, 35, .08);--surface-a20: rgba(10, 25, 35, .18);--card-bg: rgba(255, 255, 255, .78);--card-border: rgba(10, 25, 35, .12);--card-grad-a: #ffffff;--card-grad-b: #eff3f7;--border-1: rgba(10, 25, 35, .12);--border-2: #c8d2da;--border-3: #b4c0ca;--text-1: #0b1418;--text-main: #1b272d;--text-2: #1b272d;--text-2a: #27343b;--text-3: #33434c;--text-4: #47585f;--text-5: #5a6a72;--text-6: #5f6f77;--text-hub: #4a5d66;--on-accent: #ffffff;--accent-cyan: #0b7c8c;--accent-pink: #b3007a;--accent-a03: rgba(11, 124, 140, .05);--accent-a05: rgba(11, 124, 140, .07);--accent-a08: rgba(11, 124, 140, .1);--accent-a10: rgba(11, 124, 140, .12);--accent-a20: rgba(11, 124, 140, .2);--accent-a30: rgba(11, 124, 140, .32);--accent-a40: rgba(11, 124, 140, .45);--accent-a50: rgba(11, 124, 140, .55);--valence-color: #c2185b;--valence-text: #a8144e;--valence-bg: rgba(194, 24, 91, .09);--valence-bg-strong: rgba(194, 24, 91, .16);--valence-border: rgba(194, 24, 91, .3);--valence-border-strong: rgba(194, 24, 91, .45);--valence-grad-b: rgba(179, 0, 122, .1);--inner-color: #0a62a8;--isotope-text: #075e94;--isotope-bg: rgba(7, 94, 148, .09);--isotope-border: rgba(7, 94, 148, .3);--stable-text: #12704a;--stable-bg: rgba(18, 112, 74, .09);--stable-border: rgba(18, 112, 74, .3);--error-text: #b3261e;--error-border: rgba(179, 38, 30, .4);--danger: rgba(179, 38, 30, .9);--shadow-1: rgba(14, 30, 40, .07);--shadow-2: rgba(14, 30, 40, .11);--shadow-3: rgba(14, 30, 40, .18);--shadow-4: rgba(14, 30, 40, .28);--scrim: rgba(18, 30, 38, .5);--overlay-btn-bg: rgba(255, 255, 255, .75);--heat-empty-bg: #dbe2e8;--heat-empty-border: #b9c5cd;--heat-empty-ink: #0b1418;--cat-mix: 50%}*{box-sizing:border-box;margin:0;padding:0;font-family:Microsoft YaHei,PingFang SC,system-ui,sans-serif;-webkit-tap-highlight-color:transparent}body{background-color:var(--bg-dark);color:var(--text-main);display:flex;flex-direction:column;align-items:center;min-height:100vh;overflow-x:hidden;padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px)}.app-content{width:100%;display:flex;flex-direction:column;align-items:center}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:3px}.bg-animation{position:fixed;top:0;left:0;width:100%;height:100%;z-index:-1;background:radial-gradient(circle at 50% 50%,var(--bg-glow) 0%,transparent 50%),linear-gradient(0deg,var(--accent-a03) 1px,transparent 1px),linear-gradient(90deg,var(--accent-a03) 1px,transparent 1px);background-size:100% 100%,40px 40px,40px 40px;will-change:transform}.control-panel{display:flex;flex-wrap:wrap;gap:15px;background:var(--panel);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:12px 15px;border-bottom:1px solid var(--surface-4);box-shadow:0 5px 20px var(--shadow-3);margin-bottom:15px;z-index:100;width:100%;justify-content:center;align-items:center;position:sticky;top:0}.hub-link{display:inline-flex;align-items:center;gap:7px;padding:6px 14px 6px 8px;border:1px solid var(--surface-5);border-radius:999px;background:var(--surface-a04);font-size:12px;font-weight:600;letter-spacing:.02em;color:var(--text-hub);text-decoration:none;white-space:nowrap;transition:border-color .2s,background .2s,color .2s}.hub-link:hover{border-color:var(--accent-cyan);color:var(--accent-cyan);background:var(--accent-a08)}.hub-mark{height:16px;width:auto;display:block}.title-box h1{font-size:20px;font-weight:800;text-transform:uppercase;letter-spacing:2px;background:linear-gradient(90deg,var(--text-1),var(--accent-cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap}.github-silent-link{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--surface-6);transition:color .3s,opacity .3s,transform .3s;z-index:10}.github-silent-link:hover{color:var(--text-1);transform:translateY(-50%) scale(1.1)}.mode-group{display:flex;background:var(--shadow-2);border-radius:8px;padding:4px;gap:4px;flex-wrap:wrap;justify-content:center}.mode-btn{background:transparent;border:1px solid transparent;color:var(--text-4);padding:8px 12px;border-radius:5px;cursor:pointer;font-size:13px;transition:.3s;font-weight:500;white-space:nowrap}.mode-btn:hover{color:var(--text-1);background:var(--surface-3)}.mode-btn.active{background:var(--accent-cyan);color:var(--on-accent);font-weight:700;box-shadow:0 0 10px var(--accent-a40)}.language-toggle{display:flex;gap:4px;justify-content:center;margin:8px 0}.lang-btn{background:transparent;border:1px solid transparent;color:var(--text-4);padding:6px 10px;border-radius:5px;cursor:pointer;font-size:12px;transition:.3s;font-weight:500;white-space:nowrap}.lang-btn:hover{color:var(--text-1);background:var(--surface-3)}.lang-btn.active{background:var(--accent-cyan);color:var(--on-accent);font-weight:700;box-shadow:0 0 10px var(--accent-a40)}.theme-btn{background:transparent;border:1px solid var(--border-3);color:var(--text-4);width:32px;height:32px;padding:0;border-radius:5px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:.3s;flex-shrink:0}.theme-btn:hover{color:var(--accent-cyan);border-color:var(--accent-cyan);background:var(--surface-3)}.theme-btn:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:2px}.theme-btn svg{display:block}.theme-btn svg[hidden]{display:none}.search-box{width:100%;max-width:280px}.search-box input{background:var(--shadow-2);border:1px solid var(--border-3);color:var(--text-1);padding:10px 15px;border-radius:8px;outline:none;width:100%;font-size:14px}.search-box input:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:2px;border-color:var(--accent-cyan)}.table-wrapper{width:100%;overflow-x:auto;overflow-y:hidden;padding:10px;-webkit-overflow-scrolling:touch}.periodic-table{display:grid;grid-template-columns:repeat(18,68px);grid-template-rows:repeat(10,76px);gap:5px;margin:0 auto 30px;transition:.5s;width:max-content}.element{--cat-ink: color-mix(in srgb, var(--cat-color, var(--accent-cyan)) var(--cat-mix), #000);background:var(--card-bg);border:1px solid var(--card-border);border-color:var(--cat-ink);border-radius:6px;position:relative;cursor:pointer;transition:all .3s ease;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:2px;opacity:0;transform:scale(.8);will-change:transform,opacity;color:inherit;font:inherit;text-align:center}.element.visible{opacity:var(--element-opacity, 1);transform:scale(1);will-change:auto}.element:hover{transform:scale(1.15)!important;z-index:100;box-shadow:0 0 25px var(--shadow-4);border-color:var(--cat-ink)}.element .atomic-number{position:absolute;top:4px;left:5px;font-size:10px;opacity:.6}.element .symbol{color:var(--cat-ink);font-size:24px;font-weight:700;text-shadow:0 1px 3px var(--shadow-3);line-height:1.1;margin-top:4px;font-family:Arial,sans-serif}.element .name{font-size:11px;opacity:.95;margin-top:0;font-weight:500}.element .detail-val{position:absolute;bottom:3px;right:5px;font-size:9px;color:var(--accent-cyan);display:none;font-weight:700}.element.placeholder{border-style:dashed;background:var(--surface-0);justify-content:center;align-items:center;gap:2px}.element.placeholder .range-num{font-size:11px;color:var(--cat-ink);font-weight:700}.element.placeholder .name{font-size:11px;opacity:.8;margin:0}.element.placeholder:hover{background:var(--surface-a08);border-style:solid;transform:scale(1.05)!important}.periodic-table.heatmap-active .element{border-color:var(--shadow-1)}.periodic-table.heatmap-active .element .detail-val{display:block}.legend-wrapper{width:100%;padding:0 10px;margin-bottom:15px}.legend{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;max-width:1000px;margin:0 auto}.legend-item{font-size:12px;display:flex;align-items:center;padding:6px 10px;border-radius:15px;background:var(--surface-3);cursor:pointer;border:1px solid transparent;transition:.3s;color:inherit;font-family:inherit}.legend-item:hover{background:var(--surface-4)}.legend-item.active{background:var(--surface-a20);border-color:var(--accent-cyan);box-shadow:0 0 10px var(--accent-a20)}.legend-color{width:10px;height:10px;border-radius:3px;margin-right:6px;flex-shrink:0}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--scrim);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;display:flex;justify-content:center;align-items:center;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s,visibility 0s linear .3s;padding:10px;contain:layout style}.modal-overlay.open{opacity:1;visibility:visible;pointer-events:all;transition-delay:0s}.hologram-card{width:100%;max-width:1100px;max-height:90vh;background:linear-gradient(135deg,var(--card-grad-a),var(--card-grad-b));border:1px solid var(--accent-a20);box-shadow:0 0 60px var(--accent-a10);border-radius:16px;display:flex;overflow:hidden;position:relative}.close-btn{position:absolute;top:15px;right:15px;font-size:24px;color:var(--text-1);cursor:pointer;z-index:2000;width:36px;height:36px;background:var(--overlay-btn-bg);border-radius:50%;display:flex;align-items:center;justify-content:center;border:1px solid var(--surface-4);transition:all .2s;padding:0;line-height:1}.close-btn:hover{background:var(--danger);transform:rotate(90deg)}.atom-visualizer{width:30%;min-width:250px;background:radial-gradient(circle at center,var(--accent-a05),transparent 70%);display:flex;justify-content:center;align-items:center;perspective:800px;border-right:1px solid var(--surface-3);position:relative;cursor:grab;-webkit-user-select:none;user-select:none;touch-action:none}.atom-visualizer:active{cursor:grabbing}:root[data-theme=light] .atom-visualizer{background-color:var(--stage-grad-b);border-right-color:var(--stage-border)}.expand-btn{position:absolute;top:15px;left:15px;width:36px;height:36px;background:var(--accent-a10);border:1px solid var(--accent-a30);border-radius:8px;color:var(--accent-cyan);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;z-index:10}.expand-btn:hover{background:var(--accent-a20);border-color:var(--accent-cyan);transform:scale(1.1);box-shadow:0 0 15px var(--accent-a30)}.expand-btn svg{width:18px;height:18px}.visualizer-hint{position:absolute;bottom:15px;color:var(--stage-hint);font-size:12px;pointer-events:none}.atom-container{width:200px;height:200px;position:relative;transform-style:preserve-3d;transition:transform .1s linear;will-change:transform}.nucleus{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:12px;height:12px;background:var(--nucleus);border-radius:50%;box-shadow:0 0 20px var(--nucleus);z-index:20;transform-style:preserve-3d}.orbit-ring{position:absolute;top:50%;left:50%;border-radius:50%;border:1px solid var(--surface-5);transform-style:preserve-3d;will-change:transform}.electron{position:absolute;top:50%;left:50%;border-radius:50%;transform-origin:0 0}.electron.inner{width:5px;height:5px;background:var(--inner-color);box-shadow:0 0 5px var(--inner-color)}.electron.valence{width:8px;height:8px;background:var(--valence-color);box-shadow:0 0 12px var(--valence-color);z-index:10}.electron.expanded.inner{width:8px;height:8px;box-shadow:0 0 10px var(--inner-color)}.electron.expanded.valence{width:12px;height:12px;box-shadow:0 0 20px var(--valence-color)}.info-panel{flex:1;padding:20px 25px;display:flex;flex-direction:column;overflow-y:auto;min-width:0}.header-row{display:flex;align-items:flex-start;gap:15px;margin-bottom:15px;padding-bottom:15px;border-bottom:1px solid var(--surface-4);padding-right:40px}.big-symbol{font-size:52px;font-weight:700;color:color-mix(in srgb,var(--cat-color, var(--accent-cyan)) var(--cat-mix),#000);line-height:1;font-family:Arial,sans-serif}.header-details{flex:1;min-width:0}.big-name{font-size:22px;color:var(--text-1);font-weight:700;margin-bottom:8px}.en-name{font-size:14px;color:var(--text-5);margin-left:8px;font-weight:400}.header-meta{display:flex;flex-wrap:wrap;gap:8px}.category-tag,.phase-tag,.block-tag{padding:4px 10px;border:1px solid var(--border-3);border-radius:4px;font-size:11px;color:var(--text-4);text-transform:uppercase}.category-tag{color:color-mix(in srgb,var(--cat-color, var(--text-4)) var(--cat-mix),#000);border-color:color-mix(in srgb,var(--cat-color, var(--border-3)) var(--cat-mix),#000)}.phase-tag{background:var(--surface-3)}.block-tag{background:var(--accent-a10);border-color:var(--accent-a30);color:var(--accent-cyan);font-weight:700}.summary-box{background:var(--surface-1);padding:12px 15px;border-radius:8px;margin-bottom:15px;border-left:3px solid var(--accent-a30)}.summary-box p{font-size:13px;line-height:1.6;color:var(--text-3)}.tab-nav{display:flex;gap:4px;background:var(--shadow-2);padding:4px;border-radius:8px;margin-bottom:15px}.tab-btn{flex:1;background:transparent;border:none;color:var(--text-5);padding:8px 12px;border-radius:5px;cursor:pointer;font-size:12px;transition:.3s;font-weight:500}.tab-btn:hover{color:var(--text-1);background:var(--surface-3)}.tab-btn.active{background:var(--accent-cyan);color:var(--on-accent);font-weight:700}.tab-content{flex:1;overflow-y:auto}.tab-pane{display:none}.tab-pane.active{display:block}.tab-pane[hidden]{display:none}.info-section{margin-bottom:18px}.info-section h3{font-size:12px;color:var(--accent-cyan);margin-bottom:10px;text-transform:uppercase;letter-spacing:1px;border-bottom:1px solid var(--accent-a20);padding-bottom:5px}.config-box{background:var(--accent-a05);padding:12px 15px;border-radius:8px;font-family:Courier New,monospace}.config-text{font-size:14px;color:var(--text-main);letter-spacing:1px;word-break:break-all;line-height:1.5}.config-semantic,.config-shell{font-size:12px;color:var(--text-5);margin-top:5px}.props-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.props-grid-4{grid-template-columns:repeat(4,1fr)}.prop-item{background:var(--surface-1);padding:8px 10px;border-radius:6px;border-left:3px solid var(--accent-a30)}.prop-item label{font-size:10px;color:var(--text-5);display:block;margin-bottom:3px}.prop-item span{font-size:14px;color:var(--text-1);font-weight:500}.valence-tags{display:flex;flex-wrap:wrap;gap:8px}.valence-tag{background:linear-gradient(135deg,var(--valence-bg-strong),var(--valence-grad-b));border:1px solid var(--valence-border-strong);padding:4px 12px;border-radius:15px;font-size:14px;color:var(--valence-text);font-weight:600}.isotope-tags{display:flex;flex-wrap:wrap;gap:8px}.isotope-tag{background:var(--isotope-bg);border:1px solid var(--isotope-border);padding:4px 10px;border-radius:4px;font-size:12px;color:var(--isotope-text)}.isotope-tag .mass-num{font-size:9px;vertical-align:super}.isotope-stable{background:var(--stable-bg);border-color:var(--stable-border);color:var(--stable-text)}.appearance-text{font-size:14px;color:var(--text-2a);line-height:1.5}.ionization-list{display:flex;flex-direction:column;gap:6px;max-height:200px;overflow-y:auto}.ionization-item{display:flex;justify-content:space-between;align-items:center;padding:6px 10px;background:var(--surface-1);border-radius:4px}.ion-label{font-size:12px;color:var(--text-5)}.ion-value{font-size:13px;color:var(--text-1);font-weight:500}.history-item{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--surface-3)}.history-item label{font-size:12px;color:var(--text-5)}.history-item span{font-size:13px;color:var(--text-1)}.source-link{display:inline-flex;align-items:center;gap:8px;color:var(--accent-cyan);text-decoration:none;font-size:13px;padding:8px 12px;background:var(--accent-a10);border-radius:6px;transition:.3s}.source-link:hover{background:var(--accent-a20)}.media-container{min-height:100px}.load-media-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;width:100%;padding:25px;background:var(--surface-1);border:2px dashed var(--surface-4);border-radius:10px;color:var(--text-5);cursor:pointer;transition:.3s}.load-media-btn:hover{background:var(--accent-a05);border-color:var(--accent-a30);color:var(--accent-cyan)}.load-media-btn.disabled{opacity:.4;cursor:not-allowed}.load-media-btn.disabled:hover{background:var(--surface-1);border-color:var(--surface-4);color:var(--text-5)}.load-media-btn.loading{pointer-events:none;border-color:var(--accent-a50);color:var(--accent-cyan)}.load-media-btn.loading svg{animation:spin 1s linear infinite}.load-media-btn.error{border-color:var(--error-border);color:var(--error-text);cursor:not-allowed}.load-media-btn.error:hover{background:var(--surface-1);border-color:var(--error-border);color:var(--error-text)}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.image-display{text-align:center}.image-display img{max-width:100%;max-height:250px;border-radius:8px;object-fit:contain;background:var(--shadow-1)}.image-caption{font-size:11px;color:var(--text-5);margin-top:8px;line-height:1.4}.image-attribution{font-size:10px;color:var(--text-5);opacity:.75;margin-top:4px;line-height:1.35;word-break:break-word}.model-viewer{width:100%;height:300px;border-radius:8px;overflow:hidden;background:var(--shadow-2)}.no-data{color:var(--text-6);font-size:13px}.expanded-atom-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--stage-scrim);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);z-index:2000;display:flex;justify-content:center;align-items:center;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s,visibility 0s linear .3s}.expanded-atom-overlay.open{opacity:1;visibility:visible;pointer-events:all;transition-delay:0s}.expanded-atom-card{width:90vw;height:90vh;max-width:900px;max-height:700px;background:linear-gradient(135deg,var(--stage-grad-a),var(--stage-grad-b));border:1px solid var(--accent-a30);border-radius:20px;display:flex;flex-direction:column;position:relative;box-shadow:0 0 80px var(--stage-glow),inset 0 0 60px var(--stage-glow-inset)}.expanded-atom-header{padding:20px 60px 20px 25px;border-bottom:1px solid var(--surface-4);display:flex;align-items:center;gap:15px}.expanded-atom-symbol{font-size:42px;font-weight:700;font-family:Arial,sans-serif;color:var(--accent-cyan)}.expanded-atom-name{font-size:20px;color:var(--text-5)}.expanded-atom-wrapper{flex:1;display:flex;justify-content:center;align-items:center;perspective:1200px;cursor:grab;-webkit-user-select:none;user-select:none;background:radial-gradient(circle at center,var(--accent-a03),transparent 60%);position:relative;overflow:hidden;touch-action:none}.expanded-atom-wrapper:active{cursor:grabbing}.expanded-atom-container{width:500px;height:500px;position:relative;transform-style:preserve-3d;transition:transform .1s linear;will-change:transform}.expanded-atom-container .nucleus{width:20px;height:20px;box-shadow:0 0 40px var(--nucleus),0 0 80px var(--nucleus-glow)}.expanded-atom-container .orbit-ring{border-width:2px;border-color:var(--surface-a20)}.expanded-atom-info{padding:15px 25px 20px;border-top:1px solid var(--surface-4);display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:15px}.shell-legend{display:flex;flex-wrap:wrap;gap:12px}.shell-legend-item{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-5);padding:4px 10px;background:var(--surface-2);border-radius:4px}.shell-legend-item.valence{background:var(--valence-bg);border:1px solid var(--valence-border);color:var(--valence-text)}.shell-dot{width:10px;height:10px;border-radius:50%}.shell-dot.inner{background:var(--inner-color);box-shadow:0 0 6px var(--inner-color)}.shell-dot.valence{background:var(--valence-color);box-shadow:0 0 8px var(--valence-color)}.expanded-hint{color:var(--stage-hint);font-size:12px}.rotate-hint{display:none;position:fixed;top:0;left:0;right:0;background:var(--accent-a10);border-bottom:1px solid var(--accent-cyan);padding:8px 15px;text-align:center;font-size:12px;color:var(--accent-cyan);z-index:99}@media(max-width:900px){.hologram-card{flex-direction:column;max-height:95vh}.atom-visualizer{width:100%;min-width:auto;height:180px;border-right:none;border-bottom:1px solid var(--stage-border);flex-shrink:0}.atom-container{width:160px;height:160px}.props-grid,.props-grid-4{grid-template-columns:repeat(2,1fr)}.info-panel{padding:15px 20px}.big-symbol{font-size:40px}.big-name{font-size:18px}.expanded-atom-card{width:95vw;height:85vh}.expanded-atom-container{width:350px;height:350px}}@media(max-width:600px){.rotate-hint{display:block}.control-panel{padding:10px;gap:10px;flex-direction:column;align-items:stretch}.title-box{text-align:center}.title-box h1{font-size:18px}.mode-group{justify-content:center;padding:3px;gap:3px}.mode-btn{padding:6px 8px;font-size:11px}.search-box{max-width:100%}.search-box input{padding:12px 15px;font-size:16px}.table-wrapper{padding:5px}.periodic-table{grid-template-columns:repeat(18,52px);grid-template-rows:repeat(10,60px);gap:3px}.element .atomic-number{font-size:8px;top:2px;left:3px}.element .symbol{font-size:18px;margin-top:2px}.element .name{font-size:9px}.element .detail-val{font-size:7px;bottom:2px;right:3px}.element:hover{transform:scale(1.1)!important}.legend-wrapper{padding:0 5px;margin-bottom:10px}.legend{gap:5px}.legend-item{font-size:10px;padding:5px 8px}.legend-color{width:8px;height:8px;margin-right:4px}.modal-overlay{padding:0;align-items:flex-end}.hologram-card{max-height:100dvh;height:100dvh;border-radius:16px 16px 0 0}.close-btn{top:calc(10px + env(safe-area-inset-top,0px));right:calc(10px + env(safe-area-inset-right,0px));width:40px;height:40px;background:var(--shadow-4)}.expand-btn{top:calc(10px + env(safe-area-inset-top,0px));left:calc(10px + env(safe-area-inset-left,0px));width:32px;height:32px}.expand-btn svg{width:16px;height:16px}.atom-visualizer{height:160px;min-height:160px}.atom-container{width:140px;height:140px}.visualizer-hint{font-size:11px;bottom:8px}.info-panel{padding:12px 15px;padding-bottom:calc(80px + env(safe-area-inset-bottom,0px))}.header-row{margin-bottom:10px;padding-bottom:10px;gap:10px;padding-right:0}.big-symbol{font-size:36px}.big-name{font-size:16px;margin-bottom:6px}.en-name{font-size:12px}.header-meta{gap:5px}.category-tag,.phase-tag,.block-tag{font-size:10px;padding:3px 8px}.summary-box{padding:10px 12px;margin-bottom:12px}.summary-box p{font-size:12px}.tab-nav{margin-bottom:12px}.tab-btn{padding:6px 8px;font-size:11px}.info-section{margin-bottom:15px}.info-section h3{font-size:11px;margin-bottom:8px}.config-box{padding:10px 12px}.config-text{font-size:12px}.props-grid{grid-template-columns:repeat(2,1fr);gap:8px}.props-grid-4{grid-template-columns:repeat(2,1fr)}.prop-item{padding:6px 8px}.prop-item label{font-size:9px}.prop-item span{font-size:12px}.valence-tags,.isotope-tags{gap:6px}.valence-tag{font-size:12px;padding:3px 10px}.isotope-tag{font-size:10px;padding:3px 8px}.load-media-btn{padding:20px}.model-viewer{height:220px}.expanded-atom-card{width:100%;height:100dvh;max-width:none;max-height:none;border-radius:0}.expanded-atom-header{padding:calc(15px + env(safe-area-inset-top,0px)) 50px 15px 15px}.expanded-atom-symbol{font-size:32px}.expanded-atom-name{font-size:16px}.expanded-atom-container{width:280px;height:280px}.expanded-atom-info{padding:12px 15px calc(20px + env(safe-area-inset-bottom,0px));flex-direction:column;gap:10px}.shell-legend{gap:8px}.shell-legend-item{font-size:11px;padding:3px 8px}}@media(max-width:400px){.periodic-table{grid-template-columns:repeat(18,44px);grid-template-rows:repeat(10,52px);gap:2px}.element .atomic-number{font-size:7px}.element .symbol{font-size:15px}.element .name{font-size:8px}.mode-btn{padding:5px 6px;font-size:10px}.legend-item{font-size:9px;padding:4px 6px}.props-grid{grid-template-columns:1fr}.props-grid-4{grid-template-columns:repeat(2,1fr)}.expanded-atom-container{width:240px;height:240px}}@media(max-height:500px)and (orientation:landscape){.rotate-hint{display:none}.control-panel{padding:8px calc(15px + env(safe-area-inset-right,0px)) 8px calc(15px + env(safe-area-inset-left,0px));flex-direction:row}.hologram-card{flex-direction:row;height:100vh;max-height:100vh;border-radius:0;padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px)}.atom-visualizer{width:30%;height:100%;min-width:180px}.info-panel{padding:12px 15px}.header-row{margin-bottom:8px;padding-bottom:8px}.big-symbol{font-size:28px}.big-name{font-size:14px}.summary-box{margin-bottom:10px;padding:8px 10px}.tab-nav,.info-section{margin-bottom:10px}.props-grid{grid-template-columns:repeat(3,1fr);gap:6px}.expanded-atom-card{flex-direction:row;height:100vh;max-height:100vh;border-radius:0;padding-left:env(safe-area-inset-left,0px);padding-right:env(safe-area-inset-right,0px)}.expanded-atom-container{width:300px;height:300px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}