/* Augmented Engineering — Tool UI kit styles (condensed from augmented.css) */
:root{
  --bg-page:#0d1b2a; --bg-surface:#0f1e30; --header-bg:rgba(13,27,42,.97);
  --s-03:rgba(255,255,255,.03); --s-04:rgba(255,255,255,.04); --s-05:rgba(255,255,255,.05);
  --s-06:rgba(255,255,255,.06); --s-07:rgba(255,255,255,.07); --s-08:rgba(255,255,255,.08);
  --s-10:rgba(255,255,255,.1); --s-12:rgba(255,255,255,.12); --s-15:rgba(255,255,255,.15);
  --s-18:rgba(255,255,255,.18); --s-25:rgba(255,255,255,.25);
  --text-1:#dde6f0; --text-heading:#c8dae8; --text-2:#9ab0c4; --text-3:#7a94a8; --text-4:#4a6a7a;
  --text-muted:#2a4a5a; --text-card-desc:#5a7588;
  --green:#27ae60; --blue:#4a90e2; --peach:#f5a623; --purple:#9b59b6;
}
[data-theme="light"]{
  --bg-page:#eef2f7; --bg-surface:#ffffff; --header-bg:rgba(238,242,247,.97);
  --s-03:rgba(0,0,0,.06); --s-04:rgba(0,0,0,.07); --s-05:rgba(0,0,0,.09);
  --s-06:rgba(0,0,0,.11); --s-07:rgba(0,0,0,.13); --s-08:rgba(0,0,0,.16);
  --s-10:rgba(0,0,0,.20); --s-12:rgba(0,0,0,.24); --s-15:rgba(0,0,0,.30);
  --s-18:rgba(0,0,0,.36); --s-25:rgba(0,0,0,.45);
  --text-1:#1a2a3a; --text-heading:#243444; --text-2:#3a5a6a; --text-3:#5a7a8a; --text-4:#9ab8c8;
  --text-muted:#9ab8c8; --text-card-desc:#4a6a78;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Segoe UI',Inter,system-ui,Arial,sans-serif;background:var(--bg-page);color:var(--text-1);min-height:100vh;display:flex;flex-direction:column;transition:background .25s,color .25s}
#root{flex:1;display:flex;flex-direction:column}

/* Header */
header{position:sticky;top:0;z-index:50;text-align:center;padding:18px 20px 14px;background:var(--header-bg);border-bottom:1px solid var(--s-08);flex-shrink:0;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
header h1{font-size:20px;font-weight:300;letter-spacing:3px;color:#fff;text-transform:uppercase}
.app-version{font-size:10px;font-weight:500;letter-spacing:.5px;color:#6a8a9a;background:var(--s-08);border:1px solid var(--s-15);border-radius:4px;padding:2px 7px;vertical-align:middle;margin-left:8px}
.hdr-icon-btn{background:none;border:none;font-size:17px;cursor:pointer;margin-left:8px;vertical-align:middle;opacity:.8}
.hdr-icon-btn:hover{opacity:1}
.header-logo{position:absolute;right:20px;top:50%;transform:translateY(-50%);display:block}
.header-logo img{height:48px;width:auto;border-radius:6px;display:block}
.mode-toggle{position:absolute;left:20px;top:50%;transform:translateY(-50%);display:flex;border-radius:8px;overflow:hidden;border:1px solid var(--s-15)}
.mode-btn{padding:7px 14px;font-size:12px;font-weight:500;cursor:pointer;background:transparent;border:none;color:#6a7f94;transition:all .15s;white-space:nowrap;letter-spacing:.3px}
.mode-btn.active{background:var(--s-12);color:#fff}
.mode-btn:hover:not(.active){background:var(--s-06);color:#bbc}

/* Welcome bar */
.welcome-bar{display:flex;align-items:center;gap:10px;padding:9px 20px;background:rgba(155,89,182,.08);border-bottom:1px solid rgba(155,89,182,.15);font-size:13px;color:var(--text-2);flex-shrink:0}
.welcome-bar strong{color:var(--text-1)}
.wb-cta{color:#c8a0e8;font-weight:600;cursor:pointer;margin-left:auto}
.wb-close{background:none;border:none;color:var(--text-4);cursor:pointer;font-size:14px}

/* Main layout */
.main{display:flex;align-items:flex-start}
.main.presentatie{align-items:center;justify-content:center}
.venn-section{width:42%;min-width:320px;flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:10px;padding:20px 12px 16px 20px;border-right:1px solid var(--s-07)}
.main.presentatie .venn-section{width:100%;border-right:none;justify-content:center}
.main.presentatie .toolbox-section,.main.presentatie .verdieping-panel{display:none}
#venn-wrapper{position:relative;width:100%;overflow:hidden;flex-shrink:0}
.main.presentatie #venn-wrapper{width:min(1120px,90%);max-height:none;padding-bottom:20px}
#venn{display:block;width:100%;height:auto;aspect-ratio:620/560;max-height:55vh;object-fit:contain}

/* Zone buttons */
.zone-btn{position:absolute;left:var(--px);top:var(--py);transform:translate(-50%,-50%);width:46px;height:46px;border-radius:12px;border:2px solid var(--s-25);background:var(--bg-surface);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;box-shadow:0 3px 12px rgba(0,0,0,.35);z-index:10;padding:0;color:#dde6f0}
.zone-btn::before{content:'';position:absolute;inset:0;border-radius:10px;background:var(--c);opacity:0;transition:opacity .18s}
.zone-btn:hover{transform:translate(-50%,-50%) scale(1.18);border-color:var(--c);box-shadow:0 0 18px var(--c),0 4px 16px rgba(0,0,0,.35);color:var(--c)}
.zone-btn:hover::before{opacity:.28}
.zone-btn.active{border-color:var(--c);box-shadow:0 0 22px var(--c);color:var(--c)}
.zone-btn.active::before{opacity:.35}
.zone-btn svg{width:24px;height:24px;pointer-events:none;position:relative;z-index:1}
.venn-subtitle{font-size:11px;color:var(--text-muted);text-align:center;cursor:pointer;letter-spacing:.4px;padding:4px 12px;border-radius:6px;transition:color .2s}
.venn-subtitle:hover{color:#6a9ab4}

/* Toolbox */
.toolbox-section{width:100%;display:flex;flex-direction:column;gap:6px;padding:0 2px 16px}
.vn-strip{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:6px 0}
.vn-label{font-size:11px;color:var(--text-4);font-weight:600}
.vn-btn{font-size:11px;padding:4px 10px;border-radius:6px;background:var(--s-04);border:1px solid var(--s-08);color:var(--text-3);cursor:pointer;transition:all .15s}
.vn-btn:hover{background:var(--s-08);color:var(--text-2)}
.vn-btn.active{background:var(--s-12);color:#fff;border-color:var(--s-18)}
.toolbox-header{display:flex;align-items:center;gap:6px;font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:var(--text-muted);padding:6px 2px 2px}
.toolbox-group-label{font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);padding:8px 2px 2px}
.tool-card{width:100%;background:var(--s-04);border:1px solid var(--s-08);border-radius:10px;padding:10px 12px;cursor:pointer;display:flex;align-items:flex-start;gap:10px;text-align:left;transition:background .15s,border-color .15s;border-left:3px solid var(--tc)}
.tool-card:hover{background:var(--s-08);border-color:var(--s-18)}
.tool-card.active{background:var(--s-07);border-color:var(--tc);box-shadow:0 0 14px rgba(0,0,0,.3)}
.tool-card-icon{font-size:20px;flex-shrink:0;line-height:1;margin-top:2px}
.tool-card-body{display:flex;flex-direction:column;gap:3px;min-width:0}
.tool-card-name{font-size:13.5px;font-weight:700;color:var(--text-heading)}
.tool-card-desc{font-size:12px;color:var(--text-card-desc);line-height:1.5}
.tool-card-tag{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.6px;color:var(--tc);margin-top:2px}

/* Detail panel */
.verdieping-panel{flex:1;display:flex;flex-direction:column;min-height:60vh}
.vd-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:var(--text-4);font-size:14px;text-align:center;padding:40px}
.vd-empty-arrow{font-size:30px;color:var(--purple)}
.vd-text{padding:24px 28px 40px;display:flex;flex-direction:column;gap:14px;animation:vdIn .25s ease}
@keyframes vdIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.vd-header{border-left:4px solid var(--zc);padding-left:16px}
.vd-header h2{font-size:22px;font-weight:700;color:var(--text-1)}
.vd-header p{font-size:12px;color:var(--text-4);text-transform:uppercase;letter-spacing:1px;margin-top:3px}
.vd-intro{font-size:15.5px;line-height:1.9;color:var(--text-2)}
.vd-image{width:100%;border-radius:8px;margin:12px 0}
.vd-card{background:var(--s-04);border:1px solid var(--s-08);border-radius:10px;padding:14px 16px;border-left:3px solid var(--cc);transition:background .15s}
.vd-card:hover{background:var(--s-07)}
.vd-card h3{font-size:14px;font-weight:600;color:var(--text-heading);margin-bottom:6px}
.vd-card p{font-size:13.5px;line-height:1.7;color:#6a8090}

/* Modal */
.modal-overlay{position:fixed;inset:0;z-index:100;background:rgba(5,12,22,.82);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;animation:fadeIn .18s ease;padding:20px}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-box{background:var(--bg-surface);border:1px solid var(--s-15);border-radius:18px;width:min(720px,96vw);max-height:90vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 32px 100px rgba(0,0,0,.75);animation:slideUp .2s ease}
@keyframes slideUp{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:18px 24px 14px;border-bottom:1px solid var(--s-08)}
.modal-head-left{display:flex;align-items:center;gap:12px}
.modal-dot{width:12px;height:12px;border-radius:50%}
.modal-head h2{font-size:18px;font-weight:700;color:var(--text-1)}
.modal-head p{font-size:11px;text-transform:uppercase;letter-spacing:1px;margin-top:2px;color:var(--text-4)}
.modal-close{background:var(--s-07);border:1px solid var(--s-15);color:#aabbc8;width:36px;height:36px;border-radius:10px;cursor:pointer;font-size:18px;display:flex;align-items:center;justify-content:center}
.modal-close:hover{background:var(--s-15);color:var(--text-1)}
.modal-body{overflow-y:auto;padding:22px 24px 26px;display:flex;flex-direction:column;gap:14px}

/* Markdown detail panel */
.vd-md{padding:24px 28px 40px;animation:vdIn .25s ease}
.vd-md h1{font-size:22px;font-weight:700;color:var(--text-1);border-left:4px solid var(--zc,var(--purple));padding-left:14px;margin-bottom:4px;letter-spacing:.3px}
.vd-md h2{font-size:15px;font-weight:700;color:var(--text-heading);margin:22px 0 6px;padding-left:2px}
.vd-md h3{font-size:13.5px;font-weight:600;color:var(--text-heading);margin:16px 0 4px}
.vd-md p{font-size:13.5px;line-height:1.8;color:var(--text-2);margin-bottom:10px}
.vd-md > p:first-of-type{font-size:15px;line-height:1.9;color:#8a9fb4;margin-top:0;padding-top:4px}
.vd-md em{color:var(--text-3);font-style:italic}
.vd-md strong{color:var(--text-1);font-weight:600}
.vd-md ul,.vd-md ol{padding-left:20px;margin-bottom:10px}
.vd-md li{font-size:13.5px;line-height:1.8;color:var(--text-2);margin-bottom:3px}
.vd-md code{font-family:monospace;font-size:12px;background:var(--s-08);border:1px solid var(--s-12);border-radius:4px;padding:1px 5px;color:#c8a0e8}
.vd-md pre{background:var(--s-04);border:1px solid var(--s-08);border-radius:8px;padding:14px 16px;overflow-x:auto;margin-bottom:12px}
.vd-md pre code{background:none;border:none;padding:0;font-size:12px;color:#9ab0c4}
.vd-md hr{border:none;border-top:1px solid var(--s-08);margin:20px 0}
/* Section headers (## in md) become card-like */
.vd-md h2{background:var(--s-04);border:1px solid var(--s-08);border-left:3px solid var(--zc,var(--purple));border-radius:8px;padding:10px 14px;margin-top:16px;font-size:14px}

/* Loading / error states */
.vd-loading{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-4);font-size:13px;padding:40px}
.vd-error{padding:28px;color:#c07070;font-size:13px;line-height:1.8;background:rgba(180,60,60,.06);border:1px solid rgba(180,60,60,.15);border-radius:10px;margin:24px 28px}
.vd-error strong{color:#e08080}

/* Scrollbars */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:var(--s-10);border-radius:5px}
::-webkit-scrollbar-track{background:transparent}