/* === Base & Variables === */
*{margin:0;padding:0;box-sizing:border-box}
:root{
--primary:#0057B8; --accent:#00B4D8; --bg:#0a1628; --card:#111d33;
--text:#e8edf5; --muted:#8899b0; --border:#1e3050;
--ok:#00c48c; --warn:#ffb347; --danger:#ff6b6b;
}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden}
a{color:var(--accent);text-decoration:none;cursor:pointer}

/* === Toast === */
#toastBox{position:fixed;top:72px;right:24px;z-index:999;display:flex;flex-direction:column;gap:8px}
.toast{background:var(--card);border:1px solid var(--border);padding:12px 20px;border-radius:10px;font-size:14px;
box-shadow:0 8px 24px rgba(0,0,0,.4);animation:slideIn .3s ease,fadeOut .4s ease 2.6s forwards;max-width:340px}
.toast.success{border-left:3px solid var(--ok)}.toast.info{border-left:3px solid var(--accent)}.toast.error{border-left:3px solid var(--danger)}
@keyframes slideIn{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}
@keyframes fadeOut{to{opacity:0;transform:translateX(40px)}}

/* === Nav === */
nav{display:flex;align-items:center;justify-content:space-between;padding:0 32px;height:56px;
background:rgba(10,22,40,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);
position:sticky;top:0;z-index:100}
.logo{font-size:21px;font-weight:700;letter-spacing:-.5px}.logo span{color:var(--accent)}
.nav-links{display:flex;gap:6px}
.nav-btn{background:none;border:1px solid transparent;color:var(--muted);padding:7px 16px;border-radius:8px;
cursor:pointer;font-size:14px;transition:.2s;font-weight:500}
.nav-btn:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-btn.active{color:var(--accent);border-color:var(--accent);background:rgba(0,180,216,.08)}
.page{display:none}.page.active{display:block}

/* === Home / Hero === */
.hero{text-align:center;padding:72px 32px 56px;background:linear-gradient(180deg,rgba(0,87,184,.12),transparent)}
.hero h1{font-size:46px;font-weight:700;line-height:1.2;margin-bottom:14px}
.hero h1 b{background:linear-gradient(135deg,var(--accent),#7c6fff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:17px;color:var(--muted);max-width:620px;margin:0 auto 28px;line-height:1.65}
.hero-btns{display:flex;gap:12px;justify-content:center}
.btn-p{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border:none;padding:13px 30px;
border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;transition:.2s}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,180,216,.3)}
.btn-s{background:transparent;color:var(--text);border:1px solid var(--border);padding:13px 30px;
border-radius:10px;font-size:15px;cursor:pointer;transition:.2s}
.btn-s:hover{border-color:var(--accent)}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:1100px;margin:0 auto 60px;padding:0 32px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px;cursor:pointer;transition:.3s}
.card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.3)}
.card-icon{font-size:38px;margin-bottom:14px}
.card h3{font-size:19px;margin-bottom:6px}
.card p{color:var(--muted);font-size:14px;line-height:1.6}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px;max-width:1100px;margin-left:auto;margin-right:auto;padding:0 32px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;text-align:center}
.stat-card .num{font-size:32px;font-weight:700;color:var(--accent);margin-bottom:4px}
.stat-card .label{font-size:12px;color:var(--muted);text-transform:uppercase}

/* === Labs & Contributors Section === */
.labs-section{max-width:1100px;margin:48px auto 40px;padding:0 32px}
.labs-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.lab-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:28px;transition:border-color .2s}
.lab-card:hover{border-color:var(--accent)}
.lab-header{display:flex;align-items:center;gap:16px;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.lab-logo-link{text-decoration:none;flex-shrink:0}
.lab-logo-img{width:56px;height:56px;object-fit:contain;border-radius:10px;padding:4px}
.matter-lab-bg{background:#1e2e2a;border-radius:10px;padding:6px}
.lab-logo-text{width:56px;height:56px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;text-align:center;line-height:1.2;flex-shrink:0}
.yudin-lab-bg{background:linear-gradient(135deg,#1a365d,#2563eb);padding:6px}
.lab-info h3{font-size:18px;font-weight:700;margin-bottom:2px}
.lab-info h3 a{color:var(--text);text-decoration:none;transition:color .2s}
.lab-info h3 a:hover{color:var(--accent)}
.lab-info p{font-size:13px;color:var(--muted)}
.lab-members{display:flex;flex-direction:column;gap:8px}
.member{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-radius:8px;background:rgba(255,255,255,.03);transition:background .15s}
.member:hover{background:rgba(0,180,216,.06)}
.member.lead{border-left:3px solid var(--ok);background:rgba(0,196,140,.06)}
.member.pi{border-left:3px solid var(--accent)}
.member-name{font-size:14px;font-weight:600;color:var(--text)}
.member-role{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
@media(max-width:768px){
  .labs-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}

/* === Shared Form Components === */
.rp-section{display:flex;flex-direction:column;gap:8px}
.fr-input{width:100%;background:var(--bg);border:1px solid var(--border);color:var(--text);
padding:8px 10px;border-radius:7px;font-size:12px;transition:.2s;font-family:inherit}
.fr-input:focus{outline:none;border-color:var(--accent)}
.rp-btn{width:100%;background:var(--bg);border:1px solid var(--border);color:var(--text);
padding:10px 0;border-radius:8px;cursor:pointer;font-size:13px;font-weight:500;text-align:center;transition:.15s}
.rp-btn:hover{border-color:var(--accent);color:var(--accent)}
.bond-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.bond-badge{display:inline-block;padding:4px 10px;border-radius:14px;font-size:11px;font-weight:600;
background:rgba(0,196,140,.15);color:#00c48c;border:1px solid rgba(0,196,140,.3)}
.bond-badge.broken{background:rgba(255,107,107,.15);color:#ff6b6b;border:1px solid rgba(255,107,107,.3)}

/* ========================================
   Visualizer Page - Canvas Whiteboard
   ======================================== */
.visualizer-wrap{display:flex;height:calc(100vh - 56px)}

/* Sidebar */
.viz-sidebar{width:320px;min-width:320px;background:var(--card);border-right:1px solid var(--border);
padding:14px;flex-shrink:0;overflow-y:auto;display:flex;flex-direction:column;gap:10px}
.viz-sidebar h4{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.8px}
.viz-doi-list{display:flex;flex-direction:column;gap:6px;overflow-y:auto;flex:1;min-height:0}
.viz-doi-item{padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;
cursor:pointer;font-size:13px;color:var(--muted);transition:.2s;overflow:visible;white-space:normal;word-break:break-word;overflow-wrap:break-word;line-height:1.45;flex-shrink:0}
.viz-doi-item:hover{border-color:var(--accent);color:var(--text);background:rgba(0,180,216,.05)}
.viz-doi-item.active{border-color:var(--accent);color:var(--accent);background:rgba(0,180,216,.1)}
.viz-doi-item .doi-meta{font-size:10px;color:var(--muted);margin-top:3px;opacity:.7}
.side-sep{height:1px;background:var(--border);margin:12px 0}

/* Canvas main area */
.viz-canvas-area{flex:1;display:flex;flex-direction:column;min-width:0}

/* Canvas toolbar */
.viz-toolbar{display:flex;align-items:center;gap:8px;padding:8px 16px;background:var(--card);
border-bottom:1px solid var(--border);flex-shrink:0;flex-wrap:wrap}
.viz-toolbar-group{display:flex;align-items:center;gap:4px}
.viz-tb-btn{background:var(--bg);border:1px solid var(--border);color:var(--muted);
padding:6px 10px;border-radius:6px;cursor:pointer;font-size:12px;transition:.15s;display:flex;align-items:center;gap:4px}
.viz-tb-btn:hover{border-color:var(--accent);color:var(--text)}
.viz-tb-btn.active{background:rgba(0,180,216,.15);border-color:var(--accent);color:var(--accent)}
.viz-tb-sep{width:1px;height:24px;background:var(--border);margin:0 6px}
.viz-zoom-label{font-size:11px;color:var(--muted);min-width:36px;text-align:center}
.viz-display-mode{font-size:11px;padding:3px 6px;border:1px solid var(--border);border-radius:6px;
background:#fff;color:var(--text);cursor:pointer;outline:none}

/* The canvas itself */
.viz-canvas{flex:1;overflow:hidden;position:relative;
background-color:#f8f9fc;
background-image:radial-gradient(circle, #d4d8e0 1px, transparent 1px);
background-size:24px 24px;cursor:grab}
.viz-canvas:active{cursor:grabbing}

.viz-canvas-inner{position:absolute;top:0;left:0;transform-origin:0 0;
width:6000px;height:4000px;pointer-events:none}

/* Canvas placeholder */
.viz-canvas-placeholder{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
text-align:center;color:#aab;font-size:16px;pointer-events:none}
.viz-canvas-placeholder .icon{font-size:48px;margin-bottom:12px;opacity:.4}
.viz-canvas-placeholder p{max-width:300px;line-height:1.5}

/* ── Canvas Elements (draggable) ── */
.cv-element{position:absolute;cursor:grab;user-select:none;pointer-events:all;transition:box-shadow .15s}
.cv-element:hover{z-index:9999 !important}
.cv-element.dragging{cursor:grabbing;box-shadow:0 12px 40px rgba(0,0,0,.3);opacity:.9}

/* Molecule box */
.cv-mol{display:flex;flex-direction:column;align-items:center;gap:6px}
.cv-mol-box{background:#fff;border:2px solid #e0e4ec;border-radius:12px;display:flex;align-items:center;
justify-content:center;overflow:hidden;transition:border-color .2s;padding:8px}
.cv-mol-box:hover{border-color:var(--accent)}
.cv-mol-box svg{width:100%;height:100%;display:block}
.cv-mol-label{font-size:15px;font-weight:700;color:#555;background:rgba(255,255,255,.85);
padding:4px 12px;border-radius:10px;text-align:center}
.cv-na{color:#aaa;font-size:13px}

/* Title */
.cv-title{font-size:24px;font-weight:700;color:#333;padding:10px 20px;background:#fff;
border-radius:10px;border:2px solid #e0e4ec;box-shadow:0 2px 8px rgba(0,0,0,.06);white-space:nowrap}
.cv-title a{color:var(--primary);text-decoration:underline}

/* Plus sign */
.cv-plus{font-size:34px;font-weight:700;color:#888;text-align:center;line-height:1}

/* Big reaction arrow */
.cv-big-arrow{display:flex;flex-direction:column;align-items:center;gap:6px}
.cv-arrow-line{height:4px;background:#0057B8;position:relative;border-radius:2px;width:140px}
.cv-arrow-head{position:absolute;right:-2px;top:-7px;width:0;height:0;
border-top:9px solid transparent;border-bottom:9px solid transparent;border-left:14px solid #0057B8}
.cv-arrow-label{font-size:13px;color:#666;text-align:center;max-width:180px;word-break:break-word}

/* Step number */
.cv-step-num{background:#0057B8;color:#fff;font-size:15px;font-weight:700;padding:6px 16px;
border-radius:16px;text-align:center;white-space:nowrap}

/* Bond changes */
.cv-bond-changes{display:flex;flex-direction:column;align-items:center;gap:6px;min-width:140px;max-width:220px;overflow-y:auto;max-height:360px}
.cv-bond-group{display:flex;flex-wrap:wrap;gap:4px;justify-content:center}
.cv-small-arrow{font-size:24px;color:#0057B8;font-weight:700}

/* Editable bond controls */
.cv-bond-edit-section{display:flex;flex-direction:column;align-items:center;gap:4px;width:100%}
.cv-bond-item-row{display:flex;align-items:center;gap:3px}
.cv-bond-color{width:18px;height:18px;border:1px solid #ccc;border-radius:4px;padding:0;cursor:pointer;
background:none;flex-shrink:0;-webkit-appearance:none;appearance:none}
.cv-bond-color::-webkit-color-swatch-wrapper{padding:1px}
.cv-bond-color::-webkit-color-swatch{border:none;border-radius:2px}
.cv-bond-order{font-size:12px;font-weight:700;color:#888;flex-shrink:0;min-width:20px}
.cv-bond-editable{cursor:default;font-size:13px}
.cv-bond-type-label{font-size:11px;font-weight:600;padding:2px 5px;border-radius:3px;flex-shrink:0;text-transform:uppercase}
.cv-bond-type-formed{color:#00c48c;background:rgba(0,196,140,.12)}
.cv-bond-type-broken{color:#ff6b6b;background:rgba(255,107,107,.12)}
.cv-bond-remove{font-size:10px;cursor:pointer;color:#ccc;font-weight:700;line-height:1;transition:.15s;flex-shrink:0}
.cv-bond-remove:hover{color:#ff4444}
.cv-bond-add-row{display:flex;gap:4px;margin-top:3px}
.cv-bond-add-btn{background:#fff;border:1px dashed #ccc;color:#888;padding:2px 8px;border-radius:10px;
font-size:10px;cursor:pointer;font-weight:600;transition:.15s}
.cv-bond-add-btn:hover{border-color:#00c48c;color:#00c48c;background:rgba(0,196,140,.06)}
.cv-bond-add-btn.cv-bond-add-broken:hover{border-color:#ff6b6b;color:#ff6b6b;background:rgba(255,107,107,.06)}
.cv-bond-source{font-size:9px;color:#aaa;font-style:italic;margin-top:1px}

/* === Fixed Step Selector Bar (below toolbar) === */
.step-selector-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:6px 16px;
background:var(--card);border-bottom:1px solid var(--border);min-height:32px}
.step-selector-bar .cv-step-selector-label{font-size:12px;font-weight:600;color:var(--muted);margin-right:4px}
.step-selector-bar .cv-step-check{display:flex;align-items:center;gap:3px;font-size:12px;color:var(--text);cursor:pointer;
padding:3px 8px;border-radius:6px;transition:.15s;border:1px solid transparent}
.step-selector-bar .cv-step-check:hover{background:rgba(0,180,216,.08);border-color:rgba(0,180,216,.2)}
.step-selector-bar .cv-step-check input[type="checkbox"]{accent-color:var(--accent);cursor:pointer}
.step-selector-bar .cv-step-all-btn{background:var(--card);border:1px solid var(--border);color:var(--muted);
padding:3px 10px;border-radius:6px;cursor:pointer;font-size:11px;font-weight:600;transition:.15s}
.step-selector-bar .cv-step-all-btn:hover{border-color:var(--accent);color:var(--accent)}

/* === Step Selector Checkboxes (legacy, inside canvas) === */
.cv-step-selector{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:8px;padding:8px 12px;
background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:8px}
.cv-step-selector-label{font-size:12px;font-weight:600;color:var(--muted);margin-right:4px}
.cv-step-check{display:flex;align-items:center;gap:3px;font-size:12px;color:var(--text);cursor:pointer;
padding:3px 8px;border-radius:6px;transition:.15s;border:1px solid transparent}
.cv-step-check:hover{background:rgba(0,180,216,.08);border-color:rgba(0,180,216,.2)}
.cv-step-check input[type="checkbox"]{accent-color:var(--accent);cursor:pointer}
.cv-step-all-btn{background:var(--card);border:1px solid var(--border);color:var(--muted);
padding:3px 10px;border-radius:6px;cursor:pointer;font-size:11px;font-weight:600;transition:.15s}
.cv-step-all-btn:hover{border-color:var(--accent);color:var(--accent)}

/* === Draw Button === */
.draw-btn{background:var(--card);border:1px solid var(--border);color:var(--accent);padding:6px 12px;
border-radius:8px;cursor:pointer;font-size:12px;font-weight:600;transition:.15s;white-space:nowrap}
.draw-btn:hover{border-color:var(--accent);background:rgba(0,180,216,.1)}

/* === Ketcher Modal === */
/* === Structure Search Page === */
.search-wrap{display:flex;gap:24px;padding:24px;height:calc(100vh - 60px);overflow:hidden}
.search-draw-panel{flex:0 0 58%;display:flex;flex-direction:column;gap:10px}
.search-draw-panel h4{font-size:16px;font-weight:700;margin:0}
.search-desc{font-size:13px;color:var(--muted);margin:0}
.search-input-row{display:flex;gap:8px;align-items:center}
.search-input-row .fr-input{flex:1}

/* Drawing Toolbar */
.draw-tb{width:52px;background:var(--card);border:1px solid var(--border);border-radius:10px;
display:flex;flex-direction:column;align-items:center;padding:8px 0;gap:2px;flex-shrink:0}
.dtb-btn{width:44px;height:34px;border:none;background:transparent;color:var(--muted);border-radius:7px;
cursor:pointer;display:flex;align-items:center;justify-content:center;gap:2px;transition:.15s;flex-shrink:0;position:relative}
.dtb-btn:hover{background:rgba(255,255,255,.08);color:var(--text)}
.dtb-btn.on{background:rgba(0,180,216,.15);color:var(--accent)}
.dtb-btn:active{transform:scale(.92)}
.dtb-label{font-size:9px;font-weight:600;opacity:.6}
.dtb-btn.on .dtb-label{opacity:1}
.dtb-sep{width:32px;height:1px;background:var(--border);margin:3px 0;flex-shrink:0}

/* Canvas header with tool indicator */
.draw-canvas-header{display:flex;align-items:center;justify-content:space-between;padding:4px 4px 4px 0;flex-shrink:0}
.draw-tool-indicator{font-size:12px;font-weight:700;color:var(--accent);padding:2px 10px;
background:rgba(0,180,216,.08);border-radius:6px;letter-spacing:.3px}
.draw-hints{font-size:10px;color:var(--muted);opacity:.7}

/* Drawing Canvas */
.draw-canvas-wrap{flex:1;background:#fff;border-radius:10px;border:1px solid var(--border);position:relative;overflow:hidden;
box-shadow:inset 0 1px 3px rgba(0,0,0,.04)}
.draw-canvas-wrap canvas{display:block;position:absolute;inset:0}

/* Bottom bar: SMILES + Atoms + Functional Groups */
.draw-bottom-bar{display:flex;flex-direction:column;gap:6px;padding:8px 0;flex-shrink:0}
.draw-live-smiles{background:var(--bg);border:1px solid var(--border);border-radius:6px;
padding:7px 12px;font-family:'Courier New',monospace;font-size:12px;color:var(--muted);
overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.draw-bar-label{font-size:10px;color:var(--muted);font-weight:700;letter-spacing:.5px;text-transform:uppercase;
white-space:nowrap;flex-shrink:0;min-width:46px}
.draw-elem-section,.draw-frag-section{display:flex;align-items:center;gap:8px}
.draw-elem-grid{display:flex;gap:4px;flex-wrap:wrap}
.draw-elem-grid .el-btn{width:38px;height:34px;border:1.5px solid var(--border);background:var(--bg);
border-radius:7px;cursor:pointer;font-size:15px;font-weight:700;text-align:center;transition:.15s;
display:flex;align-items:center;justify-content:center}
.draw-elem-grid .el-btn:hover{background:rgba(255,255,255,.08);transform:translateY(-1px);box-shadow:0 2px 8px rgba(0,0,0,.2)}
.draw-elem-grid .el-btn.on{background:rgba(0,180,216,.18);border-color:var(--accent);box-shadow:0 0 10px rgba(0,180,216,.3)}
.draw-frag-grid{display:flex;gap:4px;flex-wrap:wrap}
.draw-frag-grid .fg-btn{height:32px;padding:0 10px;border:1px solid var(--border);background:var(--bg);color:var(--text);
border-radius:7px;cursor:pointer;font-size:12px;font-weight:600;text-align:center;transition:.15s;white-space:nowrap;
display:flex;align-items:center;justify-content:center}
.draw-frag-grid .fg-btn:hover{border-color:var(--accent);color:var(--accent);background:rgba(0,180,216,.06);transform:translateY(-1px)}
.draw-frag-grid .fg-btn.on{background:rgba(0,180,216,.18);border-color:var(--accent);color:var(--accent);box-shadow:0 0 10px rgba(0,180,216,.3)}

/* Atom element picker popup (double-click) */
.draw-atom-popup{position:fixed;z-index:500;background:var(--card);border:1px solid var(--border);border-radius:10px;
padding:6px;display:flex;flex-wrap:wrap;gap:3px;width:180px;box-shadow:0 8px 24px rgba(0,0,0,.5);
animation:popIn .15s ease}
.atom-popup-btn{width:32px;height:30px;border:1px solid var(--border);background:var(--bg);border-radius:6px;
cursor:pointer;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:.1s}
.atom-popup-btn:hover{border-color:var(--accent);background:rgba(0,180,216,.1);transform:scale(1.08)}
.atom-popup-btn.current{border-color:var(--accent);background:rgba(0,180,216,.2);box-shadow:0 0 6px rgba(0,180,216,.3)}

/* ── Search Result Detail Modal ── */
.sr-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:400;
align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.sr-overlay.on{display:flex}
.sr-modal{background:var(--card);border:1px solid var(--border);border-radius:16px;
width:520px;max-width:92vw;display:flex;flex-direction:column;animation:popIn .2s ease;
overflow:hidden;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.sr-close{position:absolute;top:12px;right:12px;background:none;border:none;color:var(--muted);
font-size:20px;cursor:pointer;padding:4px 8px;border-radius:6px;transition:.15s;z-index:1}
.sr-close:hover{color:var(--text);background:rgba(255,255,255,.08)}
.sr-mol-display{background:#fff;display:flex;align-items:center;justify-content:center;
padding:28px;min-height:200px;border-bottom:1px solid var(--border)}
.sr-mol-display svg{max-width:100%;max-height:220px}
.sr-details{padding:20px 24px 24px}
.sr-smiles-row{display:flex;align-items:center;gap:8px;margin-bottom:16px}
.sr-smiles{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:8px;
padding:10px 14px;font-family:'Courier New',monospace;font-size:13px;color:var(--accent);
overflow-x:auto;white-space:nowrap;word-break:break-all;display:block}
.sr-copy-btn{background:var(--bg);border:1px solid var(--border);color:var(--text);
padding:8px 14px;border-radius:8px;cursor:pointer;font-size:12px;font-weight:600;
transition:.15s;white-space:nowrap;flex-shrink:0}
.sr-copy-btn:hover{border-color:var(--accent);color:var(--accent);background:rgba(0,180,216,.08)}
.sr-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}
.sr-meta-item{display:flex;flex-direction:column;gap:2px}
.sr-meta-label{font-size:10px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.sr-meta-value{font-size:13px;color:var(--text);font-weight:500;word-break:break-word}
.sr-actions{display:flex;gap:10px}
.sr-action-btn{flex:1;padding:12px;border:1px solid var(--border);border-radius:10px;
cursor:pointer;font-size:14px;font-weight:600;text-align:center;transition:.2s;background:var(--bg);color:var(--text)}
.sr-action-btn:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(0,0,0,.3)}
.sr-btn-db{border-color:rgba(0,180,216,.3);color:var(--accent)}
.sr-btn-db:hover{background:rgba(0,180,216,.1);border-color:var(--accent)}
.sr-btn-viz{border-color:rgba(0,87,184,.3);color:var(--primary)}
.sr-btn-viz:hover{background:rgba(0,87,184,.1);border-color:var(--primary)}

.search-results-panel{flex:1;display:flex;flex-direction:column;gap:12px;overflow:hidden}
.search-results-panel h4{font-size:16px;font-weight:700;margin:0}
.search-results{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px}
.search-placeholder{color:var(--muted);font-size:13px;text-align:center;padding:40px 20px}
.search-result-card{background:var(--card);border:1px solid var(--border);border-radius:10px;
padding:12px;display:flex;gap:12px;align-items:center;cursor:pointer;transition:.15s}
.search-result-card:hover{border-color:var(--accent);background:rgba(0,180,216,.04)}
.search-result-mol{width:80px;height:80px;background:#fff;border-radius:6px;border:1px solid #e0e4ec;
display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}
.search-result-mol svg{max-width:100%;max-height:100%}
.search-result-info{flex:1;min-width:0}
.search-result-doi{font-size:13px;font-weight:600;color:var(--accent);word-break:break-word}
.search-result-smiles{font-size:11px;color:var(--muted);font-family:monospace;overflow:hidden;
text-overflow:ellipsis;white-space:nowrap;margin-top:2px}
.search-result-step{font-size:11px;color:var(--muted);margin-top:2px}
.search-result-highlight{display:inline-block;background:rgba(0,180,216,.12);color:var(--accent);
font-size:10px;padding:1px 6px;border-radius:4px;margin-top:4px}
.search-backend-badge{display:inline-flex;align-items:center;font-size:11px;font-weight:600;
padding:3px 10px;border-radius:20px;margin-left:8px;white-space:nowrap}
.search-backend-badge.online{background:rgba(0,196,140,.15);color:#00c48c;border:1px solid rgba(0,196,140,.3)}
.search-backend-badge.offline{background:rgba(0,180,216,.1);color:var(--accent);border:1px solid rgba(0,180,216,.2)}

/* Reagent label */
.cv-reagent{font-size:10px;color:#888;font-style:italic;text-align:center;
background:rgba(255,179,71,.1);border:1px solid rgba(255,179,71,.3);border-radius:6px;padding:3px 8px}

/* Step connector */
.cv-step-connector{font-size:28px;color:#0057B8;font-weight:700}

/* Section title */
.cv-section-title{font-size:14px;font-weight:700;color:#555;text-transform:uppercase;
letter-spacing:1px;padding:6px 14px;background:#fff;border-radius:8px;border:1px dashed #ccc}

/* Text note (user-added) */
.cv-text-note{font-size:14px;color:#333;padding:8px 14px;background:#fffbe6;border:2px solid #ffd54f;
border-radius:8px;min-width:80px;min-height:30px;outline:none;cursor:text;line-height:1.4}
.cv-text-note:focus{border-color:#ffb347}

/* Draggable arrow */
.cv-draggable-arrow{padding:10px 0;cursor:grab}

/* Circle marker */
.cv-circle-marker{width:60px;height:60px;border:3px solid #ff0000;border-radius:50%;
background:rgba(255,0,0,.08);cursor:grab}

/* Resize handles - 4 corners */
.cv-resize-handle{position:absolute;width:12px;height:12px;
background:var(--accent);border:2px solid #fff;border-radius:2px;
opacity:0;transition:opacity .2s;z-index:10}
.cv-mol:hover .cv-resize-handle{opacity:.7}
.cv-resize-handle:hover{opacity:1 !important;transform:scale(1.25)}
.cv-resize-handle.cv-rh-se{bottom:-4px;right:-4px;cursor:nwse-resize}
.cv-resize-handle.cv-rh-sw{bottom:-4px;left:-4px;cursor:nesw-resize}
.cv-resize-handle.cv-rh-ne{top:-4px;right:-4px;cursor:nesw-resize}
.cv-resize-handle.cv-rh-nw{top:-4px;left:-4px;cursor:nwse-resize}

/* Edge resize zones (invisible hover zones for cursor change) */
.cv-mol-box{position:relative}
.cv-edge-zone{position:absolute;z-index:5;opacity:0}
.cv-edge-zone.cv-ez-right{right:-5px;top:10%;width:10px;height:80%;cursor:ew-resize}
.cv-edge-zone.cv-ez-bottom{bottom:-5px;left:10%;width:80%;height:10px;cursor:ns-resize}
.cv-edge-zone.cv-ez-left{left:-5px;top:10%;width:10px;height:80%;cursor:ew-resize}
.cv-edge-zone.cv-ez-top{top:-5px;left:10%;width:80%;height:10px;cursor:ns-resize}

/* Bond marking mode */
.cv-mol-box.marking-mode{cursor:crosshair !important}
.cv-mol-box.marking-mode svg{cursor:crosshair !important}
.cv-mol-box.marking-mode:hover{border-color:#ffa500;box-shadow:0 0 0 2px rgba(255,165,0,.3)}

/* Marked bond overlay */
.cv-bond-mark{position:absolute;border-radius:50%;pointer-events:all;cursor:pointer;
opacity:.8;transition:transform .15s;z-index:8}
.cv-bond-mark:hover{transform:scale(1.3);opacity:1}
.cv-bond-mark.formed{background:rgba(0,196,140,.5);border:2px solid #00c48c;box-shadow:0 0 6px rgba(0,196,140,.5)}
.cv-bond-mark.broken{background:rgba(255,107,107,.5);border:2px solid #ff6b6b;box-shadow:0 0 6px rgba(255,107,107,.5)}

/* Active marking mode buttons */
.viz-tb-btn.mark-active-formed{background:rgba(0,196,140,.2) !important;border-color:#00c48c !important;color:#00c48c !important}
.viz-tb-btn.mark-active-broken{background:rgba(255,107,107,.2) !important;border-color:#ff6b6b !important;color:#ff6b6b !important}

/* Atom selection highlight (first atom selected, waiting for second) */
.cv-atom-select{pointer-events:none;transition:opacity .15s}
/* Atom/bond mark overlays */
.cv-mark-overlay{pointer-events:none}

/* SMILES text fallback */
.cv-smiles-text{font-family:'Courier New',monospace;font-size:10px;color:#666;
padding:6px;word-break:break-all;text-align:center;line-height:1.3}

/* Step connectors */
.cv-step-connector-h{font-size:24px;color:#0057B8;font-weight:700}
.cv-step-connector-v{font-size:12px;color:#0057B8;font-weight:600;text-align:center}

/* Selection rectangle */
.cv-selection-rect{position:absolute;border:2px dashed #0057B8;background:rgba(0,87,184,.08);
z-index:99990;pointer-events:none;border-radius:2px}

/* Selection action bar */
.cv-sel-action-bar{position:absolute;z-index:99991;display:flex;gap:4px;padding:4px;
background:#fff;border:1px solid #d0d5dd;border-radius:8px;box-shadow:0 4px 16px rgba(0,0,0,.15)}
.cv-sel-btn{background:#fff;border:1px solid #d0d5dd;color:#333;padding:6px 12px;border-radius:6px;
cursor:pointer;font-size:12px;font-weight:500;transition:.15s;white-space:nowrap}
.cv-sel-btn:hover{background:#f0f4ff;border-color:#0057B8;color:#0057B8}
.cv-sel-btn-close{padding:6px 8px;color:#999}
.cv-sel-btn-close:hover{color:#ff4444;border-color:#ff4444;background:#fff0f0}

/* Context menu */
.cv-context-menu{position:absolute;z-index:99995;background:#fff;border:1px solid #d0d5dd;
border-radius:10px;box-shadow:0 8px 32px rgba(0,0,0,.18);padding:6px 0;min-width:220px}
.cv-ctx-item{padding:8px 16px;font-size:13px;color:#333;cursor:pointer;transition:.1s}
.cv-ctx-item:hover{background:#f0f4ff;color:#0057B8}
.cv-ctx-sep{height:1px;background:#e8ecf0;margin:4px 0}

/* ========================================
   Database Page
   ======================================== */
.data-wrap{display:flex;gap:14px;min-height:calc(100vh - 56px);padding:16px 24px 24px}
.side{width:250px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px;flex-shrink:0}
.side h4{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}
.fi{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;cursor:pointer;font-size:13px;transition:.15s}
.fi:hover{background:rgba(255,255,255,.04)}
.fi-icon{font-size:17px;flex-shrink:0}
.side-stat{padding:10px;background:var(--bg);border-radius:8px;margin-bottom:8px}
.side-stat .label{font-size:10px;color:var(--muted);text-transform:uppercase}
.side-stat .value{font-size:16px;font-weight:700;color:var(--accent);margin-top:2px}
.dm{flex:1;display:flex;flex-direction:column;gap:12px;min-width:0}
.topbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sbox{flex:1;min-width:200px;display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:9px 14px}
.sbox input{flex:1;background:none;border:none;color:var(--text);font-size:13px;outline:none}
.sbox input::placeholder{color:var(--muted)}
.dt{width:100%;background:var(--card);border:1px solid var(--border);border-radius:12px;overflow-x:auto;flex:1}
.dt table{width:100%;border-collapse:collapse;min-width:900px}
.dt th{text-align:left;padding:12px 14px;font-size:11px;color:var(--muted);text-transform:uppercase;
letter-spacing:.5px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.15);cursor:pointer;user-select:none;white-space:nowrap}
.dt th:hover{color:var(--accent)}
.dt th .arrow{font-size:10px;margin-left:4px;opacity:.4}
.dt th.sorted .arrow{opacity:1;color:var(--accent)}
.dt td{padding:10px 14px;font-size:13px;border-bottom:1px solid var(--border);vertical-align:middle}
.dt tr:last-child td{border-bottom:none}
.dt tbody tr{cursor:pointer;transition:.1s}
.dt tbody tr:hover td{background:rgba(255,255,255,.025)}
.mp{width:50px;height:50px;background:#fff;border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid #e0e4ec}
.mp svg{max-width:100%;max-height:100%}
.pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:12px}
.pag-btn{background:var(--card);border:1px solid var(--border);color:var(--muted);padding:6px 10px;
border-radius:6px;cursor:pointer;font-size:12px;transition:.15s}
.pag-btn:hover:not(:disabled){border-color:var(--accent);color:var(--text)}
.pag-btn:disabled{opacity:.5;cursor:not-allowed}
.pag-btn.active{background:rgba(0,180,216,.15);border-color:var(--accent);color:var(--accent)}

/* === Detail Overlay === */
.detail-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:300;
align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.detail-overlay.on{display:flex}
.detail-modal{background:var(--card);border:1px solid var(--border);border-radius:16px;
width:850px;max-width:95vw;max-height:90vh;display:flex;flex-direction:column;animation:popIn .25s ease;overflow:hidden}
@keyframes popIn{from{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}
.detail-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border)}
.detail-header h2{font-size:20px;font-weight:700}
.detail-close{background:none;border:none;color:var(--muted);font-size:24px;cursor:pointer;padding:4px 8px;border-radius:6px;transition:.15s}
.detail-close:hover{color:var(--text);background:rgba(255,255,255,.06)}
.detail-body{flex:1;overflow-y:auto;padding:24px}
.detail-mol-pair{display:flex;gap:20px;margin-bottom:24px}
.detail-mol-side{flex:1;display:flex;flex-direction:column}
.detail-mol-side h4{font-size:13px;color:var(--muted);text-transform:uppercase;margin-bottom:10px;text-align:center}
.detail-mol-img{width:100%;aspect-ratio:1.2;background:#fff;border-radius:12px;padding:10px;
display:flex;align-items:center;justify-content:center;border:1px solid #e0e4ec}
.detail-mol-img svg{max-width:100%;max-height:100%}
.prop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-bottom:20px}
.prop-card{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:14px}
.prop-card .lb{font-size:11px;color:var(--muted);margin-bottom:4px}
.prop-card .vl{font-size:14px;font-weight:700;word-break:break-word}

/* === Bond Legend (detail modal) === */
.detail-bond-legend{display:flex;gap:20px;justify-content:center;margin-bottom:16px;padding:8px 16px;
background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:8px}
.legend-item{display:flex;align-items:center;gap:6px;font-size:12px;font-weight:600}
.legend-dot{width:12px;height:12px;border-radius:3px}
.legend-formed .legend-dot{background:rgba(0,192,115,.35);border:2px solid #00c073}
.legend-broken .legend-dot{background:rgba(230,40,40,.35);border:2px solid #e62828}
.legend-formed{color:#00c48c}
.legend-broken{color:#ff6b6b}

/* === Loading === */
.loading-overlay{position:fixed;inset:0;background:var(--bg);z-index:9999;display:flex;
flex-direction:column;align-items:center;justify-content:center;gap:16px;transition:opacity .5s}
.loading-overlay.hide{opacity:0;pointer-events:none}
.ld-spin{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}