/* ============================================================
   BactoInteractDB — approved academic visual language
   White background · navy serif headings · restrained blue accents
   ============================================================ */

:root{
  --navy:#12335f;      /* primary serif headings            */
  --navy-2:#0e2a4d;    /* deep navy (logo tile, footer)     */
  --blue:#245ea8;      /* buttons / links                    */
  --blue-2:#2e78c7;    /* brighter accent ("DB", eyebrow)    */
  --ink:#1e2a38;       /* strong body text                   */
  --muted:#5c6b7a;     /* secondary text                     */
  --muted-2:#8593a2;   /* faint captions                     */
  --line:#e3e9f1;      /* hairline borders                   */
  --line-2:#eef2f7;    /* very light rules                   */
  --soft:#f5f8fc;      /* soft panels                        */
  --card:#ffffff;      /* card surface                       */
  --hl:#eaf1fb;        /* highlight box                      */

  /* evidence / category accents */
  --c-exp:#2f6fb5;     /* experimental (blue)   */
  --c-cur:#4a9e70;     /* curated (green)       */
  --c-pred:#8560ad;    /* predicted (purple)    */
  --c-inf:#c79a3a;     /* inferred (gold)       */
  --c-coral:#cf6f6f;   /* bacterial protein     */

  --wrap:1240px;
  --radius:10px;
  --shadow:0 1px 2px rgba(16,42,77,.04), 0 8px 24px rgba(16,42,77,.05);

  --font-serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--ink);
  background:#fff;
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--navy);font-weight:600;line-height:1.2;margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 40px}
.serif{font-family:var(--font-serif)}
.muted{color:var(--muted)}

/* ---------------- Header ---------------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(6px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;min-height:78px;padding:12px 40px;max-width:var(--wrap);margin:0 auto}
.brand{display:flex;align-items:center;gap:14px;flex:none}
.brand .mark{width:44px;height:44px;flex:none}
.brand .wordmark{font-family:var(--font-serif);font-weight:700;font-size:23px;color:var(--navy);letter-spacing:.1px;line-height:1.05}
.brand .wordmark .db{color:var(--blue-2)}
.brand .tag{font-size:11.5px;color:var(--muted);font-family:var(--font-sans);line-height:1.25;margin-top:2px;max-width:230px}
.brand a{color:inherit;text-decoration:none}

.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.main-nav a{color:#33475b;font-size:14.5px;font-weight:500;padding:6px 2px;position:relative;text-decoration:none}
.main-nav a:hover{color:var(--blue)}
.main-nav a.active{color:var(--blue);font-weight:600}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--blue);border-radius:2px}

.header-actions{display:flex;align-items:center;gap:16px;flex:none;padding-left:8px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--navy);cursor:pointer}
.icon-btn:hover{border-color:#c9d6e6;background:var(--soft)}
.login-link{display:inline-flex;align-items:center;gap:7px;color:#33475b;font-size:14.5px;font-weight:500}
.login-link:hover{color:var(--blue);text-decoration:none}
.nav-toggle{display:none}

/* ---------------- Search overlay ---------------- */
.search-overlay{position:fixed;inset:0;z-index:100;background:rgba(14,42,77,.35);backdrop-filter:blur(2px);display:none;align-items:flex-start;justify-content:center;padding-top:14vh}
.search-overlay.open{display:flex}
.search-panel{width:min(760px,92vw);background:#fff;border-radius:14px;box-shadow:0 30px 80px rgba(16,42,77,.35);padding:26px}
.search-panel h3{font-size:15px;color:var(--muted);font-family:var(--font-sans);font-weight:600;text-transform:uppercase;letter-spacing:.09em;margin-bottom:12px}
.search-panel .searchbar{margin:0}
.search-panel .hint{margin-top:14px;font-size:13px;color:var(--muted)}

/* ---------------- Generic sections ---------------- */
section{padding:0}
.eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--blue-2);font-family:var(--font-sans)}
.page-head{padding:54px 0 26px}
.page-head h1{font-size:42px;margin:10px 0 12px}
.page-head p.lead{font-size:17px;color:var(--muted);max-width:940px;margin:0}
.rule{height:1px;background:var(--line);border:0;margin:0}
.section-pad{padding:60px 0}

/* ---------------- Hero (home) ---------------- */
.hero{background:linear-gradient(180deg,#fbfdff 0%, #f4f8fd 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:64px 0 56px}
.hero h1{font-size:62px;line-height:1.02;letter-spacing:-.5px;margin-bottom:20px}
.hero h1 .db{color:var(--blue-2)}
.hero .subtitle{font-family:var(--font-serif);font-size:25px;color:var(--navy);font-weight:500;line-height:1.28;margin-bottom:18px}
.hero .desc{font-size:16.5px;color:var(--muted);max-width:560px;margin-bottom:26px}
.hero-art{border-radius:16px;overflow:hidden;box-shadow:0 20px 50px rgba(16,42,77,.10);border:1px solid var(--line)}
.hero-art img{width:100%;height:100%;object-fit:cover}

/* search bar */
.searchbar{display:flex;align-items:stretch;max-width:640px;border:1.5px solid #cdd9e8;border-radius:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.searchbar:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px rgba(36,94,168,.12)}
.searchbar .s-icon{display:flex;align-items:center;padding:0 6px 0 16px;color:var(--muted)}
.searchbar input{flex:1;border:0;outline:0;font-size:16px;padding:15px 10px;font-family:var(--font-sans);color:var(--ink);background:transparent}
.searchbar button{border:0;background:var(--blue);color:#fff;font-size:15px;font-weight:600;padding:0 30px;cursor:pointer;font-family:var(--font-sans)}
.searchbar button:hover{background:#1d5093}
.examples{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px;font-size:13.5px;color:var(--muted)}
.chip{display:inline-block;padding:6px 13px;border:1px solid var(--line);border-radius:20px;background:var(--soft);color:#3a4b5c;font-size:13px}
.chip.it{font-style:italic}
a.chip:hover{border-color:#c3d3e6;text-decoration:none;color:var(--blue)}

/* ---------------- Stats strip ---------------- */
.stats-strip{background:var(--soft);border:1px solid var(--line);border-radius:14px;display:grid;grid-template-columns:repeat(6,1fr);margin:-28px 0 0;overflow:hidden}
.stat{display:flex;align-items:center;gap:14px;padding:22px 20px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .s-ic{width:34px;height:34px;color:var(--blue);flex:none}
.stat .s-num{font-family:var(--font-serif);font-weight:700;font-size:23px;color:var(--navy);line-height:1}
.stat .s-lab{font-size:12.5px;color:var(--muted);margin-top:3px}

/* ---------------- Explore cards ---------------- */
.explore-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}
.explore-head h2{font-size:30px}
.explore-head .line{flex:1;height:1px;background:var(--line)}
.explore-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.ex-card{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;transition:transform .15s ease, box-shadow .15s ease;display:block;color:inherit}
.ex-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.ex-card .thumb{height:132px;overflow:hidden}
.ex-card .thumb img{width:100%;height:100%;object-fit:cover}
.ex-card .body{padding:16px 16px 18px}
.ex-card h3{font-size:18px;margin-bottom:6px}
.ex-card p{font-size:13.5px;color:var(--muted);margin:0 0 12px;min-height:38px}
.ex-card .go{width:30px;height:30px;border-radius:50%;border:1.5px solid currentColor;display:inline-flex;align-items:center;justify-content:center}

/* accent color variants */
.acc-blue{color:var(--c-exp)} .acc-coral{color:var(--c-coral)} .acc-green{color:var(--c-cur)}
.acc-gold{color:var(--c-inf)} .acc-purple{color:var(--c-pred)}

/* ---------------- Generic cards / grids ---------------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:30px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* stat cards (statistics page) */
.metric{border:1px solid var(--line);border-radius:12px;padding:24px 26px;background:#fff}
.metric .n{font-family:var(--font-serif);font-weight:700;font-size:34px;color:var(--navy);line-height:1}
.metric .l{font-size:14px;color:var(--muted);margin-top:8px}

/* ---------------- Pills / tabs ---------------- */
.pills{display:flex;flex-wrap:wrap;gap:10px}
.pill{padding:9px 18px;border:1px solid var(--line);border-radius:22px;background:#fff;color:#33475b;font-size:14px;font-weight:500;cursor:pointer}
.pill:hover{border-color:#c3d3e6;text-decoration:none;color:var(--blue)}
.pill.active{background:var(--blue);border-color:var(--blue);color:#fff}

/* ---------------- Tables ---------------- */
.table-wrap{border:1px solid var(--line);border-radius:12px;overflow:hidden}
table.data{width:100%;border-collapse:collapse;font-size:14.5px}
table.data thead th{background:var(--soft);text-align:left;font-weight:600;color:var(--navy);padding:14px 20px;border-bottom:1px solid var(--line);font-size:13.5px}
table.data td{padding:15px 20px;border-bottom:1px solid var(--line-2);color:#3a4b5c}
table.data tbody tr:last-child td{border-bottom:0}
table.data tbody tr:hover{background:#fafcfe}
table.data td.name{font-weight:600;color:var(--navy)}

/* ---------------- Layout with sidebar ---------------- */
.split{display:grid;grid-template-columns:300px 1fr;gap:26px;align-items:start}
.sidecard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px}
.sidecard h3{font-size:20px;margin-bottom:16px}

/* taxonomy / doc tree */
.tree{list-style:none;margin:0;padding:0;font-size:14px}
.tree .lbl{color:var(--blue-2);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:11.5px;margin-bottom:10px}
.tree li{padding:6px 0}
.tree .lvl1{font-weight:700;color:var(--navy)}
.tree .lvl2{padding-left:16px;color:#33475b}
.tree .lvl3{padding-left:32px;color:#33475b}
.tree .cur{background:var(--hl);color:var(--blue);border-radius:7px;padding:7px 12px;margin-left:24px;font-weight:600}

.docnav{list-style:none;margin:0;padding:0}
.docnav li a{display:block;padding:10px 14px;border-radius:8px;color:#33475b;font-size:14.5px}
.docnav li a:hover{background:var(--soft);text-decoration:none}
.docnav li a.active{background:var(--hl);color:var(--blue);font-weight:600}

/* form controls */
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.04em;color:#3a4b5c;margin-bottom:6px}
.field select,.field input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:var(--font-sans);color:var(--ink);background:#fff}
.field select:focus,.field input:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px rgba(36,94,168,.12)}

/* legend */
.legend{list-style:none;margin:14px 0 0;padding:0;font-size:13.5px}
.legend li{display:flex;align-items:center;gap:9px;padding:5px 0;color:#3a4b5c}
.dot{width:12px;height:12px;border-radius:50%;flex:none}

/* ---------------- Evidence badges ---------------- */
.badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.05em;padding:3px 9px;border-radius:5px;color:#fff}
.b-exp{background:var(--c-exp)} .b-cur{background:var(--c-cur)} .b-inf{background:var(--c-inf)} .b-pred{background:var(--c-pred)}

/* ---------------- Tools cards ---------------- */
.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.tool-card{border:1px solid var(--line);border-radius:12px;padding:26px;background:#fff;transition:transform .15s,box-shadow .15s}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.tool-card .tic{width:44px;height:44px;border-radius:50%;margin-bottom:18px}
.tool-card h3{font-size:19px;margin-bottom:8px}
.tool-card p{font-size:13.5px;color:var(--muted);margin:0 0 16px}
.tool-card .open{font-size:13.5px;font-weight:700}

/* ---------------- Download page ---------------- */
.release-box{background:var(--hl);border:1px solid #cfdff3;border-radius:14px;padding:28px 32px;display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.release-box .rl{font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-2)}
.release-box h2{font-size:28px;margin:4px 0 0}
.release-box .meta{color:var(--muted);font-size:14px}
.fmt{display:inline-block;background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:9px 16px;font-weight:700;font-size:13.5px;color:var(--blue)}
.fmt.green{color:var(--c-cur)}.fmt.purple{color:var(--c-pred)}

/* ---------------- Network canvas ---------------- */
.net-canvas{background:linear-gradient(180deg,#fbfdff,#f4f8fd);border:1px solid var(--line);border-radius:14px;height:560px;min-height:560px;position:relative;overflow:hidden}
.net-canvas h3{position:absolute;top:22px;left:26px;font-size:20px;z-index:2}
.net-legend{position:absolute;bottom:20px;left:26px;font-size:12.5px;z-index:2}
.net-legend b{display:block;font-weight:700}

/* bars (statistics) */
.barrow{display:grid;grid-template-columns:190px 1fr auto;align-items:center;gap:14px;margin:16px 0}
.barrow .lab{font-size:14px;color:#3a4b5c}
.bartrack{background:#eef2f7;border-radius:8px;height:16px;overflow:hidden}
.barfill{height:100%;border-radius:8px}
.vbars{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;align-items:end;margin-top:16px}
.vbar{display:flex;flex-direction:column;align-items:center;justify-content:flex-end}
.vbar .cnt{font-family:var(--font-serif);font-weight:700;color:var(--navy);font-size:15px;margin-bottom:8px}
.vbar .track{width:100%;height:190px;background:#eef4fb;border-radius:12px 12px 0 0;position:relative;overflow:hidden}
.vbar .fill{position:absolute;left:0;right:0;bottom:0;background:var(--c-exp);border-radius:12px 12px 0 0}
.vbar .name{font-size:12px;font-weight:600;color:var(--navy);margin-top:10px;text-align:center;line-height:1.25}

/* ---- interactive network (cytoscape) ---- */
#cy{position:absolute;left:0;right:0;top:56px;bottom:0}
.net-info{margin-top:16px;padding:12px 14px;background:var(--soft);border:1px solid var(--line);border-radius:8px;font-size:13px;min-height:64px;line-height:1.5}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--blue);font-weight:600;font-size:13.5px;cursor:pointer}
.btn:hover{border-color:#c9d6e6;background:var(--soft)}

/* ---- 3D structure viewer ---- */
.viewer-head{margin-bottom:12px}
.viewer-wrap{position:relative;width:100%;height:560px;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.viewer-wrap #molstar-viewer{position:absolute;inset:0;width:100%;height:100%}
.msp-plugin .msp-layout-standard{border:none}
.mini-search{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:13.5px;margin-bottom:12px;font-family:inherit}
.mini-search:focus{outline:none;border-color:var(--blue-2)}
.struct-list{max-height:560px;overflow-y:auto;display:flex;flex-direction:column;gap:6px;padding-right:4px}
.struct-item{display:flex;flex-wrap:wrap;align-items:center;gap:8px;text-align:left;width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;font-family:inherit}
.struct-item:hover{border-color:#c9d6e6;background:var(--soft)}
.struct-item.active{border-color:var(--blue);background:var(--hl)}
.struct-item.complex{border-left:3px solid var(--c-pred)}
.struct-item .pid{font-family:monospace;font-weight:700;color:var(--navy);font-size:13.5px}
.struct-item .cx{font-size:10.5px;font-weight:700;color:var(--c-pred);background:#efe9f7;border-radius:4px;padding:1px 6px}
.struct-item .g{flex-basis:100%;font-size:12px;color:var(--muted)}

/* ---------------- Footer ---------------- */
.site-footer{background:#0e2a4d;color:#c6d4e6;margin-top:80px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1.3fr;gap:48px;padding:56px 40px 40px;max-width:var(--wrap);margin:0 auto}
.footer-brand .wordmark{font-family:var(--font-serif);font-weight:700;font-size:22px;color:#fff}
.footer-brand .wordmark .db{color:#7fb0e0}
.footer-brand p{font-size:13.5px;color:#9db4d0;margin-top:12px;max-width:340px}
.footer-col h4{font-family:var(--font-sans);font-size:12.5px;letter-spacing:.11em;text-transform:uppercase;color:#7fa0c4;margin-bottom:16px;font-weight:700}
.footer-col a{display:block;color:#c6d4e6;font-size:14px;padding:5px 0}
.footer-col a:hover{color:#fff;text-decoration:none}
.dev-block{font-size:13.5px;color:#c6d4e6;line-height:1.65}
.dev-block .name{color:#fff;font-weight:600}
.dev-block a{color:#9db4d0}
.ksu-wrap{margin-top:18px}
.ksu-wrap img{width:220px;border-radius:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom .fb{max-width:var(--wrap);margin:0 auto;padding:18px 40px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8ea6c4}

/* ---------------- Responsive ---------------- */
@media(max-width:1080px){
  .main-nav{gap:18px}
  .brand .tag{display:none}
  .stats-strip{grid-template-columns:repeat(3,1fr)}
  .stat:nth-child(3n){border-right:0}
  .explore-grid{grid-template-columns:repeat(3,1fr)}
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:50px}
}
@media(max-width:820px){
  .wrap,.header-inner{padding-left:22px;padding-right:22px}
  .nav-toggle{display:inline-flex}
  .main-nav{position:fixed;inset:78px 0 auto 0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:8px 22px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.18s}
  .main-nav.open{transform:none;opacity:1;pointer-events:auto}
  .main-nav a{padding:13px 2px;border-bottom:1px solid var(--line-2)}
  .main-nav a.active::after{display:none}
  .header-actions .login-link span{display:none}
  .hero-grid{grid-template-columns:1fr;gap:28px}
  .hero h1{font-size:44px}
  .grid-2,.grid-3,.grid-4,.split{grid-template-columns:1fr}
  .stats-strip{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3n){border-right:1px solid var(--line)}
  .stat:nth-child(2n){border-right:0}
  .explore-grid{grid-template-columns:1fr 1fr}
  .tool-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .vbars{grid-template-columns:repeat(3,1fr);height:auto;gap:22px 16px}
  .vbar{height:180px}
  .page-head h1{font-size:32px}
}
@media(max-width:520px){
  .explore-grid{grid-template-columns:1fr}
  .searchbar button{padding:0 18px}
}