:root{
    --bg:#F7F6F2;
    --surface:#FFFFFF;
    --surface-2:#EFEDE6;
    --ink:#1B1F27;
    --muted:#5C6270;
    --faint:#8D9199;
    --line:#E3E0D8;
    --line-strong:#CBC7BB;
    --accent:#2B3A8F;
    --accent-soft:#E7E9F5;
    --nova:#1F7A70;   --nova-soft:#E2EFEC;
    --atlas:#9C6A17;  --atlas-soft:#F2E8D6;
    --libra:#7C4560;  --libra-soft:#F0E3EB;
    --scribe:#39623C; --scribe-soft:#E2EBE1;
    --iris:#3E6E96;   --iris-soft:#E1EBF2;
    --vesta:#A14B3B;  --vesta-soft:#F3E2DE;
    --manual:#6B665C; --manual-soft:#EDEAE1;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --bg:#14161B;
      --surface:#1B1E25;
      --surface-2:#20232B;
      --ink:#EAE8E1;
      --muted:#A2A7B2;
      --faint:#6C7079;
      --line:#2B2E36;
      --line-strong:#393D46;
      --accent:#8593E0;
      --accent-soft:#232741;
      --nova:#5FBFB2;   --nova-soft:#1A2C29;
      --atlas:#D3A24E;  --atlas-soft:#302411;
      --libra:#CB93AF;  --libra-soft:#2E1F27;
      --scribe:#83BF85;  --scribe-soft:#1B2A1C;
      --iris:#7FA8D6;   --iris-soft:#1C2A38;
      --vesta:#E0846E;  --vesta-soft:#34211C;
      --manual:#A6A093; --manual-soft:#242219;
    }
  }
  :root[data-theme="dark"]{
    --bg:#14161B;
    --surface:#1B1E25;
    --surface-2:#20232B;
    --ink:#EAE8E1;
    --muted:#A2A7B2;
    --faint:#6C7079;
    --line:#2B2E36;
    --line-strong:#393D46;
    --accent:#8593E0;
    --accent-soft:#232741;
    --nova:#5FBFB2;   --nova-soft:#1A2C29;
    --atlas:#D3A24E;  --atlas-soft:#302411;
    --libra:#CB93AF;  --libra-soft:#2E1F27;
    --scribe:#83BF85;  --scribe-soft:#1B2A1C;
    --iris:#7FA8D6;   --iris-soft:#1C2A38;
    --vesta:#E0846E;  --vesta-soft:#34211C;
    --manual:#A6A093; --manual-soft:#242219;
  }

  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
    font-size:16px;
    line-height:1.65;
    font-weight:400;
  }
  h1,h2,h3{
    font-family:"Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
    text-wrap:balance;
    margin:0;
    color:var(--ink);
    letter-spacing:-0.015em;
  }
  a{ color:inherit; }
  img,svg{ max-width:100%; }

  .wrap{ max-width:1180px; margin:0 auto; padding:0 48px; }

  /* ---------- top nav ---------- */
  .topnav{
    position:sticky; top:0; z-index:20;
    background:color-mix(in srgb, var(--bg) 90%, transparent);
    backdrop-filter: blur(10px);
    border-bottom:1px solid var(--line);
  }
  .topnav-inner{
    max-width:1180px; margin:0 auto; padding:20px 48px;
    display:flex; align-items:center; gap:28px; flex-wrap:wrap;
  }
  .brand{ font-weight:800; font-size:.94rem; letter-spacing:-0.01em; margin-right:auto; }
  .topnav nav{ display:flex; gap:24px; flex-wrap:wrap; }
  .topnav nav a{
    text-decoration:none; font-size:.82rem; color:var(--muted);
    font-weight:500;
    padding:4px 1px; border-bottom:1px solid transparent;
    transition:color .15s, border-color .15s;
  }
  .topnav nav a:hover, .topnav nav a:focus-visible{ color:var(--ink); border-color:var(--ink); outline:none; }

  .lang-toggle{
    display:flex; align-items:center; border:1px solid var(--line-strong); border-radius:7px; overflow:hidden;
    flex:none;
  }
  .lang-toggle button{
    font-family:inherit; font-size:.76rem; font-weight:700; letter-spacing:.02em;
    padding:5px 11px; border:none; background:transparent; color:var(--muted); cursor:pointer;
    transition:background .15s, color .15s;
  }
  .lang-toggle button + button{ border-left:1px solid var(--line-strong); }
  .lang-toggle button:hover{ color:var(--ink); }
  .lang-toggle button.active{ background:var(--accent-soft); color:var(--accent); }
  .lang-toggle button:focus-visible{ outline:2px solid var(--accent); outline-offset:-2px; }

  /* ---------- header ---------- */
  header.hero{
    position:relative; height:calc(100vh - 69px); display:flex; flex-direction:column; justify-content:center;
    padding:56px 0 56px;
  }
  h1.title{
    font-size:clamp(3rem, 7vw, 5.4rem);
    font-weight:800; line-height:1.02; letter-spacing:-0.02em; max-width:18ch;
    opacity:0; transform:translateY(18px);
    animation:heroIn .8s cubic-bezier(.2,.7,.15,1) .1s forwards;
  }
  .lede{
    margin-top:28px; max-width:52ch; color:var(--muted); font-size:1.32rem; font-weight:400; line-height:1.5;
    opacity:0; transform:translateY(18px);
    animation:heroIn .8s cubic-bezier(.2,.7,.15,1) .28s forwards;
  }
  @keyframes heroIn{
    to{ opacity:1; transform:translateY(0); }
  }

  .scroll-indicator{
    position:absolute; left:50%; bottom:56px;
    color:var(--faint); display:flex; align-items:center; justify-content:center;
    transition:color .15s, opacity .35s ease, transform .35s ease;
    opacity:0; transform:translateX(-50%) translateY(18px);
    animation:scrollIndicatorIn .8s cubic-bezier(.2,.7,.15,1) .5s forwards;
  }
  @keyframes scrollIndicatorIn{
    to{ opacity:1; transform:translateX(-50%) translateY(0); }
  }
  .scroll-indicator:hover, .scroll-indicator:focus-visible{ color:var(--accent); outline:none; }
  .scroll-indicator.is-hidden{ opacity:0 !important; pointer-events:none; transform:translateX(-50%) translateY(10px); }
  .scroll-dot{ animation:scrollDot 1.8s ease-in-out infinite .8s; transform-origin:center; }
  @keyframes scrollDot{
    0%{ transform:translateY(0); opacity:1; }
    50%{ transform:translateY(9px); opacity:.35; }
    100%{ transform:translateY(0); opacity:1; }
  }

  /* ---------- scroll-reveal ---------- */
  .reveal{ opacity:0; transform:translateY(16px); transition:opacity .7s cubic-bezier(.2,.7,.15,1), transform .7s cubic-bezier(.2,.7,.15,1); }
  .reveal.is-visible{ opacity:1; transform:translateY(0); }

  @media (prefers-reduced-motion: reduce){
    .scroll-dot{ animation:none; }
    h1.title, .lede, .scroll-indicator{ animation:none; opacity:1; transform:none; }
    .reveal{ opacity:1; transform:none; transition:none; }
  }

  section{ padding:84px 0; border-bottom:1px solid var(--line); }
  section:last-of-type{ border-bottom:none; }
  .section-head{ margin-bottom:38px; }
  h2.section-title{ font-size:1.6rem; font-weight:700; max-width:28ch; }
  .section-dek{ margin-top:11px; color:var(--muted); max-width:62ch; font-size:.98rem; font-weight:400; }

  /* ---------- architecture diagram ---------- */
  .arch-diagram{
    display:flex; align-items:stretch; justify-content:center; gap:0; margin-bottom:36px;
    overflow-x:auto; padding-bottom:4px;
  }
  .arch-col{ display:flex; flex-direction:column; align-items:center; justify-content:center; min-width:150px; }
  .arch-node{
    background:var(--surface); border:1px solid var(--line-strong); border-radius:8px;
    padding:16px 14px; text-align:center; width:100%;
  }
  .arch-node .label{ font-weight:700; font-size:.92rem; }
  .arch-node .sub{ font-size:.76rem; color:var(--muted); margin-top:2px; font-weight:500; }
  .arch-node.accent{ border-color:var(--accent); background:var(--accent-soft); }
  .arch-hidden{
    border:1px dashed var(--line-strong); border-radius:10px; padding:14px 10px;
    display:flex; flex-direction:column; gap:8px; min-width:170px; background:var(--surface-2);
  }
  .arch-hidden .cap{ font-size:.68rem; letter-spacing:.06em; text-transform:uppercase; color:var(--faint); text-align:center; margin-bottom:2px; font-weight:700;}
  .arch-agent-chip{
    display:flex; align-items:center; gap:8px; padding:6px 8px; border-radius:6px;
    font-size:.78rem; font-weight:700; background:var(--surface);
  }
  .arch-agent-chip .dot{ width:9px; height:9px; border-radius:50%; flex:none; }
  .arch-arrow{ display:flex; align-items:center; justify-content:center; min-width:34px; color:var(--faint); }
  .arch-arrow svg{ display:block; }

  .role-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:8px; overflow:hidden; }
  .role-card{
    background:var(--surface); padding:22px;
  }
  .role-card h3{ font-size:1rem; font-weight:700; margin-bottom:6px; }
  .role-card p{ margin:0; font-size:.88rem; color:var(--muted); line-height:1.55; }
  .role-card .tag{
    font-size:.7rem; letter-spacing:.06em; text-transform:uppercase; font-weight:700;
    color:var(--accent); margin-bottom:9px; display:block;
  }

  /* ---------- fase timeline ---------- */
  .fase-list{ position:relative; }
  .fase-list::before{
    content:""; position:absolute; left:23px; top:8px; bottom:8px; width:1px; background:var(--line-strong);
  }
  .fase{ position:relative; padding-left:64px; margin-bottom:26px; }
  .fase:last-child{ margin-bottom:0; }
  .fase-num{
    position:absolute; left:0; top:0; width:47px; height:47px; border-radius:50%;
    background:var(--surface); border:1.5px solid var(--line-strong);
    display:flex; align-items:center; justify-content:center;
    font-weight:800; font-size:1rem; color:var(--muted);
    z-index:1;
  }
  .fase[data-agent="nova"] .fase-num{ border-color:var(--nova); color:var(--nova); }
  .fase[data-agent="atlas"] .fase-num{ border-color:var(--atlas); color:var(--atlas); }
  .fase[data-agent="libra"] .fase-num{ border-color:var(--libra); color:var(--libra); }
  .fase[data-agent="scribe"] .fase-num{ border-color:var(--scribe); color:var(--scribe); }
  .fase[data-agent="iris"] .fase-num{ border-color:var(--iris); color:var(--iris); }
  .fase[data-agent="vesta"] .fase-num{ border-color:var(--vesta); color:var(--vesta); }
  .fase[data-agent="manual"] .fase-num{ border-color:var(--manual); color:var(--manual); }

  .fase-card{
    background:var(--surface); border:1px solid var(--line); border-radius:10px;
    padding:22px 24px;
  }
  .fase-top{ display:flex; align-items:flex-start; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-bottom:13px; }
  .fase-title{ font-size:1.14rem; font-weight:700; letter-spacing:-0.01em; }
  .agent-badge{
    display:inline-flex; align-items:center; gap:7px; padding:5px 11px; border-radius:999px;
    font-size:.76rem; font-weight:700; white-space:nowrap;
  }
  .agent-badge .dot{ width:8px; height:8px; border-radius:50%; }
  .fase[data-agent="nova"] .agent-badge{ background:var(--nova-soft); color:var(--nova); }
  .fase[data-agent="nova"] .agent-badge .dot{ background:var(--nova); }
  .fase[data-agent="atlas"] .agent-badge{ background:var(--atlas-soft); color:var(--atlas); }
  .fase[data-agent="atlas"] .agent-badge .dot{ background:var(--atlas); }
  .fase[data-agent="libra"] .agent-badge{ background:var(--libra-soft); color:var(--libra); }
  .fase[data-agent="libra"] .agent-badge .dot{ background:var(--libra); }
  .fase[data-agent="scribe"] .agent-badge{ background:var(--scribe-soft); color:var(--scribe); }
  .fase[data-agent="scribe"] .agent-badge .dot{ background:var(--scribe); }
  .fase[data-agent="iris"] .agent-badge{ background:var(--iris-soft); color:var(--iris); }
  .fase[data-agent="iris"] .agent-badge .dot{ background:var(--iris); }
  .fase[data-agent="vesta"] .agent-badge{ background:var(--vesta-soft); color:var(--vesta); }
  .fase[data-agent="vesta"] .agent-badge .dot{ background:var(--vesta); }
  .fase[data-agent="manual"] .agent-badge{ background:var(--manual-soft); color:var(--manual); }
  .fase[data-agent="manual"] .agent-badge .dot{ background:var(--manual); }

  .fase-agent-full{ font-size:.78rem; color:var(--faint); margin-top:-7px; margin-bottom:13px; font-weight:500; }
  .model-chip{
    position:relative;
    display:inline-flex; align-items:center; gap:5px; padding:4px 10px; border-radius:999px;
    font-size:.72rem; font-weight:700; background:var(--surface-2); border:1px solid var(--line-strong); color:var(--muted);
    cursor:help;
  }
  .model-chip::before{ content:""; width:6px; height:6px; border-radius:50%; background:var(--faint); flex:none; }
  .fase-agent-full .model-chip{ margin-left:14px; vertical-align:middle; }

  .model-chip[data-tip]:hover::after,
  .model-chip[data-tip]:focus-visible::after{
    content:attr(data-tip);
    position:absolute; bottom:calc(100% + 9px); left:50%; transform:translateX(-50%);
    width:230px; padding:9px 11px; border-radius:8px;
    background:var(--ink); color:var(--bg);
    font-size:.74rem; font-weight:500; line-height:1.45; text-align:left; letter-spacing:0;
    white-space:normal; text-transform:none;
    box-shadow:0 10px 24px -8px rgba(0,0,0,.4);
    z-index:30; pointer-events:none;
  }
  .model-chip[data-tip]:hover::before,
  .model-chip[data-tip]:focus-visible::before{
    content:""; position:absolute; bottom:calc(100% + 4px); left:50%; transform:translateX(-50%);
    border:5px solid transparent; border-top-color:var(--ink);
    z-index:30; pointer-events:none;
  }
  .model-chip:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; }
  .fase-row{ display:grid; grid-template-columns:104px 1fr; gap:8px 14px; font-size:.91rem; margin-top:9px; }
  .fase-row dt{ color:var(--faint); font-size:.72rem; text-transform:uppercase; letter-spacing:.05em; font-weight:700; padding-top:2px; }
  .fase-row dd{ margin:0; color:var(--ink); font-weight:400; }
  .fase-row + .fase-row{ border-top:1px solid var(--line); padding-top:9px; }
  .datalaag-note{
    margin-top:13px; padding:10px 13px; border-radius:7px; background:var(--surface-2);
    font-size:.82rem; color:var(--muted); display:flex; gap:8px; align-items:flex-start; font-weight:500;
  }

  /* ---------- human-in-the-loop cycle ---------- */
  .loop-diagram{
    position:relative; aspect-ratio:1/1; max-width:520px; margin:0 auto;
  }
  .loop-svg{ position:absolute; inset:0; width:100%; height:100%; }
  .loop-node{
    position:absolute; transform:translate(-50%,-50%);
    display:flex; flex-direction:column; align-items:center; gap:2px; text-align:center;
    background:var(--surface); border:1.5px solid var(--line-strong); border-radius:12px;
    padding:14px 12px; width:132px; z-index:2;
  }
  .loop-node-label{ font-weight:800; font-size:.94rem; letter-spacing:-0.01em; }
  .loop-node-sub{ font-size:.7rem; color:var(--muted); font-weight:500; }
  .loop-node--docent{ top:8.3%; left:50%; }
  .loop-node--odin{ top:50%; left:91.7%; border-color:var(--accent); background:var(--accent-soft); }
  .loop-node--sub{ top:91.7%; left:50%; width:216px; }
  .loop-node--mcp{ top:50%; left:8.3%; }

  .loop-caption{
    position:absolute; width:148px; font-size:.76rem; color:var(--muted); font-weight:500; line-height:1.42;
  }
  .loop-caption b{ display:block; color:var(--ink); font-weight:700; font-size:.78rem; margin-bottom:2px; }
  .loop-caption--tr{ top:2%; right:2%; text-align:right; }
  .loop-caption--br{ bottom:2%; right:2%; text-align:right; }
  .loop-caption--bl{ bottom:2%; left:2%; text-align:left; }
  .loop-caption--tl{ top:2%; left:2%; text-align:left; }

  .loop-center{
    position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
    font-size:.68rem; font-weight:800; letter-spacing:.06em; text-transform:uppercase;
    color:var(--faint); text-align:center; line-height:1.5; z-index:1;
  }

  @media (max-width:640px){
    .loop-diagram{ aspect-ratio:auto; max-width:340px; }
    .loop-caption{ display:none; }
    .loop-svg{ display:none; }
    .loop-node{ position:static; transform:none; width:auto; margin:0 auto 10px; }
    .loop-node--sub{ width:auto; }
    .loop-center{ display:none; }
    .loop-diagram::after{
      content:"Docent → ODIN → Sub-agents → MCP → terug naar Docent";
      display:block; text-align:center; font-size:.78rem; color:var(--faint); margin-top:4px;
    }
  }

  /* ---------- planning ---------- */
  .plan-header-row{ display:grid; grid-template-columns:1.15fr 1fr; gap:0; margin-bottom:6px; }
  .plan-col-head{ padding-bottom:20px; }
  .plan-col-head--agents{ padding-right:40px; }
  .plan-col-head--edu{ padding-left:40px; border-left:1px solid var(--line); }
  .plan-col-head h3{ font-size:1.1rem; font-weight:800; letter-spacing:-0.01em; }
  .plan-col-head--agents h3{ color:var(--accent); }
  .plan-col-head--edu h3{ color:var(--muted); }
  .plan-col-head p{ margin:4px 0 0; font-size:.83rem; color:var(--faint); font-weight:500; }

  .plan-rows{ display:flex; flex-direction:column; }
  .plan-row{
    display:grid; grid-template-columns:1.15fr 1fr; gap:0;
    padding:26px 0; border-bottom:1px solid var(--line); align-items:start;
  }
  .plan-row:last-child{ border-bottom:none; padding-bottom:0; }
  .plan-row-agents{ padding-right:40px; }
  .plan-row-edu{ padding-left:40px; border-left:1px solid var(--line); }

  .plan-month-head{
    display:flex; align-items:baseline; gap:12px; margin-bottom:13px;
    padding-bottom:8px; border-bottom:1px solid var(--line-strong);
  }
  .plan-month-head h3{ font-size:1.05rem; font-weight:800; }
  .plan-month-head span{ font-size:.76rem; color:var(--faint); font-weight:500; }

  /* Agent side: the primary, developer-facing deliverable */
  .plan-agent-block{ display:flex; flex-direction:column; gap:10px; }
  .plan-agent-item{
    display:flex; flex-direction:column; gap:6px;
    padding:14px 16px; border-radius:9px;
    background:var(--surface-2); border:1px solid var(--line);
  }
  .plan-agent-item-head{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
  .plan-agent-chip{ display:inline-flex; align-items:center; gap:6px; font-weight:800; font-size:.82rem; }
  .plan-agent-chip .dot{ width:8px; height:8px; border-radius:50%; flex:none; }
  .plan-agent-date{ margin-left:auto; font-weight:700; font-size:.78rem; color:var(--muted); font-variant-numeric:tabular-nums; }
  .plan-agent-item p{ margin:0; font-size:.92rem; color:var(--ink); font-weight:400; line-height:1.52; }
  .plan-agent-item p b{ font-weight:700; }

  .plan-quiet{
    font-size:.83rem; color:var(--faint); font-style:italic; margin:0;
  }

  /* Education column: secondary context, visually quieter */
  .plan-edu-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; }
  .plan-edu-list li{ font-size:.85rem; color:var(--muted); line-height:1.55; }
  .plan-edu-date{ font-weight:700; color:var(--muted); margin-right:5px; font-variant-numeric:tabular-nums; }

  @media (max-width:820px){
    .plan-header-row{ grid-template-columns:1fr; }
    .plan-col-head--edu{ padding-left:0; border-left:none; padding-top:16px; }
    .plan-row{ grid-template-columns:1fr; gap:20px; }
    .plan-row-agents{ padding-right:0; }
    .plan-row-edu{ padding-left:0; border-left:none; }
  }

  footer{ padding:44px 0 68px; text-align:center; }
  footer p{ font-size:.8rem; color:var(--faint); margin:0; font-weight:500; }

  @media (max-width:720px){
    .role-grid{ grid-template-columns:1fr; }
    .arch-diagram{ flex-direction:column; align-items:stretch; overflow-x:visible; }
    .arch-col{ min-width:0; }
    .arch-hidden{ min-width:0; }
    .arch-arrow{ transform:rotate(90deg); min-height:28px; min-width:0; }
    .fase-row{ grid-template-columns:1fr; }
    .fase-row dt{ padding-top:0; }
  }

  @media (prefers-reduced-motion: reduce){
    *{ transition:none !important; animation:none !important; }
  }

  /* ---------- mobile ---------- */
  @media (max-width:640px){
    .wrap{ padding:0 20px; }

    .topnav-inner{ padding:12px 20px; gap:12px; }
    .topnav nav{ gap:14px; order:3; flex-basis:100%; }
    .topnav nav a{ font-size:.78rem; }
    .brand{ font-size:.88rem; }
    .lang-toggle{ margin-left:auto; }

    header.hero{ height:auto; min-height:calc(100vh - 96px); padding:44px 0 64px; }
    h1.title{ font-size:clamp(2.1rem, 9vw, 3rem); max-width:100%; }
    .lede{ font-size:1.05rem; margin-top:18px; }
    .scroll-indicator{ bottom:28px; }

    section{ padding:56px 0; }
    .section-head{ margin-bottom:26px; }
    h2.section-title{ font-size:1.32rem; }
    .section-dek{ font-size:.92rem; }

    .fase-card{ padding:18px 16px; }
    .fase-top{ gap:10px; }
    .fase-title{ font-size:1.02rem; }
    .fase-agent-full{ display:flex; flex-direction:column; align-items:flex-start; gap:6px; }
    .fase-agent-full .model-chip{ margin-left:0; }

    .model-chip[data-tip]:hover::after,
    .model-chip[data-tip]:focus-visible::after{ width:min(78vw, 230px); }

    .plan-agent-item-head{ gap:8px; }
    .plan-agent-date{ margin-left:0; }

    .plan-row{ padding:20px 0; }

    .datalaag-note{ font-size:.8rem; }
  }