/* VaultAgent course — Local AI for Recruitment */

:root{
  color-scheme: light;
  --bg:#f5f6f5;
  --surface:#ffffff;
  --surface-2:#eef1ef;
  --ink:#14171a;
  --ink-2:#4a5158;
  --ink-3:#767d85;
  --rule:#dde1e4;
  --accent:#1f5f4f;
  --accent-ink:#154337;
  --accent-soft:#eaf3ef;
  --bomb-bg:#f1ecf9;   --bomb-ink:#4a3aa7;  --bomb-rule:#c9bdf0;
  --warn-bg:#fbedeb;   --warn-ink:#a3352a;  --warn-rule:#f0c4bd;
  --tech-bg:#eef1f4;   --tech-ink:#3f4a55;  --tech-rule:#d3dae0;
  --key-bg:#e9f1fb;    --key-ink:#1a5299;   --key-rule:#bcd6f2;
  --do-bg:#e8f4ec;     --do-ink:#1f6b42;    --do-rule:#b8ddc6;
  --max:720px;
  --serif: Georgia, 'Iowan Old Style', 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:where(:not([data-theme="light"])){
    color-scheme: dark;
    --bg:#111413; --surface:#191d1c; --surface-2:#222726;
    --ink:#f2f4f3; --ink-2:#b9c0c2; --ink-3:#8b9296;
    --rule:#2c3231;
    --accent:#6fc3a6; --accent-ink:#8fd4bb; --accent-soft:#1b2a26;
    --bomb-bg:#221d33; --bomb-ink:#b4a6f0; --bomb-rule:#3b3159;
    --warn-bg:#2c1c1a; --warn-ink:#e89a8f; --warn-rule:#4d2e2a;
    --tech-bg:#1e2326; --tech-ink:#a9b4bd; --tech-rule:#2f383e;
    --key-bg:#152234; --key-ink:#8ebbf0; --key-rule:#25405f;
    --do-bg:#152a1e; --do-ink:#7fca9f; --do-rule:#254a34;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:17px/1.68 var(--sans);-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent-ink);text-underline-offset:2px}
@media (prefers-color-scheme: dark){a{color:var(--accent)}}

/* ---------- shell ---------- */
.shell{display:grid;grid-template-columns:264px minmax(0,1fr);min-height:100vh}
.side{
  background:var(--surface);border-right:1px solid var(--rule);
  padding:24px 18px 40px;position:sticky;top:0;height:100vh;overflow-y:auto;
}
.brand{display:block;text-decoration:none;color:var(--ink);margin-bottom:6px}
.brand b{display:block;font-size:15.5px;line-height:1.3;letter-spacing:-.01em}
.brand span{display:block;font-size:11.5px;color:var(--ink-3);margin-top:3px;letter-spacing:.02em}
.progress-wrap{margin:16px 0 20px}
.progress-bar{height:5px;background:var(--surface-2);border-radius:3px;overflow:hidden}
.progress-bar i{display:block;height:100%;background:var(--accent);width:0;transition:width .4s ease}
.progress-txt{font-size:11.5px;color:var(--ink-3);margin-top:6px}
.mod{margin-bottom:16px}
.mod h4{
  font-size:10.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-3);
  margin:0 0 7px;font-weight:700;
}
.side a.lsn{
  display:flex;gap:8px;align-items:baseline;text-decoration:none;color:var(--ink-2);
  font-size:13.5px;line-height:1.4;padding:5px 8px;border-radius:6px;margin-bottom:1px;
}
.side a.lsn:hover{background:var(--surface-2);color:var(--ink)}
.side a.lsn.on{background:var(--accent-soft);color:var(--accent-ink);font-weight:600}
@media (prefers-color-scheme: dark){.side a.lsn.on{color:var(--accent)}}
.side a.lsn .num{color:var(--ink-3);font-variant-numeric:tabular-nums;font-size:12px;flex:none}
.side a.lsn.done .num::after{content:"✓";color:var(--accent);margin-left:2px}
.side .util{border-top:1px solid var(--rule);margin-top:18px;padding-top:14px}

.main{padding:0 0 80px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- topbar (mobile) ---------- */
.topbar{display:none}
@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .side{
    position:fixed;inset:0 auto 0 0;width:280px;z-index:50;height:100vh;
    transform:translateX(-100%);transition:transform .25s ease;
  }
  .side.open{transform:none;box-shadow:0 0 40px rgba(0,0,0,.25)}
  .topbar{
    display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:40;
    background:var(--surface);border-bottom:1px solid var(--rule);padding:11px 16px;
  }
  .topbar button{
    background:var(--surface-2);border:1px solid var(--rule);color:var(--ink);
    border-radius:7px;padding:7px 11px;font:inherit;font-size:14px;cursor:pointer;
  }
  .topbar .t{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .scrim{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:45;display:none}
  .scrim.on{display:block}
}

/* ---------- lesson ---------- */
.eyebrow{
  font-size:11.5px;text-transform:uppercase;letter-spacing:.11em;color:var(--accent-ink);
  font-weight:700;margin:40px 0 10px;
}
@media (prefers-color-scheme: dark){.eyebrow{color:var(--accent)}}
h1{font-size:35px;line-height:1.16;letter-spacing:-.025em;margin:0 0 12px;font-weight:700}
.deck{font-size:19.5px;line-height:1.48;color:var(--ink-2);margin:0 0 34px;font-weight:400}
h2{font-size:22px;line-height:1.3;letter-spacing:-.015em;margin:38px 0 12px;font-weight:650}
h3{font-size:17px;margin:28px 0 8px;font-weight:650}
p{margin:0 0 18px}
.lead{font-size:18.5px}
ul,ol{margin:0 0 18px;padding-left:22px}
li{margin-bottom:8px}
strong{font-weight:650}
hr{border:none;border-top:1px solid var(--rule);margin:34px 0}
code{
  font:0.88em/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:var(--surface-2);padding:2px 5px;border-radius:4px;
}
pre{
  background:var(--surface-2);border:1px solid var(--rule);border-radius:9px;
  padding:15px 17px;overflow-x:auto;margin:0 0 20px;
}
pre code{background:none;padding:0;font-size:14px;line-height:1.65}
blockquote{
  margin:0 0 20px;padding:2px 0 2px 18px;border-left:3px solid var(--rule);color:var(--ink-2);
}
table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:15.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
thead th{
  font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;
  color:var(--ink-2);font-weight:700;background:var(--surface-2);
}
tbody tr:last-child td{border-bottom:none}
.table-scroll{overflow-x:auto;margin-bottom:22px}
.table-scroll table{margin-bottom:0}

/* ---------- callouts ---------- */
.co{border-radius:11px;padding:18px 20px;margin:26px 0;border:1px solid;font-size:16.5px;line-height:1.62}
.co p{margin:0 0 12px}
.co p:last-child{margin-bottom:0}
.co ol,.co ul{margin-bottom:0}
.co .co-h{
  display:flex;align-items:center;gap:8px;font-weight:700;font-size:12px;
  text-transform:uppercase;letter-spacing:.09em;margin-bottom:10px;
}
.co-bomb{background:var(--bomb-bg);border-color:var(--bomb-rule)}
.co-bomb .co-h{color:var(--bomb-ink)}
.co-warn{background:var(--warn-bg);border-color:var(--warn-rule)}
.co-warn .co-h{color:var(--warn-ink)}
.co-key{background:var(--key-bg);border-color:var(--key-rule)}
.co-key .co-h{color:var(--key-ink)}
.co-do{background:var(--do-bg);border-color:var(--do-rule)}
.co-do .co-h{color:var(--do-ink)}

details.tech{
  background:var(--tech-bg);border:1px solid var(--tech-rule);border-radius:11px;
  margin:26px 0;overflow:hidden;
}
details.tech>summary{
  cursor:pointer;list-style:none;padding:14px 20px;font-size:12px;font-weight:700;
  text-transform:uppercase;letter-spacing:.09em;color:var(--tech-ink);
  display:flex;align-items:center;gap:8px;user-select:none;
}
details.tech>summary::-webkit-details-marker{display:none}
details.tech>summary::after{content:"+";margin-left:auto;font-size:16px;line-height:1}
details.tech[open]>summary::after{content:"−"}
details.tech .tech-body{padding:0 20px 16px;font-size:16px;line-height:1.62;color:var(--ink-2)}
details.tech .tech-body p:last-child{margin-bottom:0}

/* ---------- media placeholders ---------- */
.media{
  border:1px dashed var(--rule);border-radius:11px;background:var(--surface);
  padding:26px 20px;margin:26px 0;text-align:center;color:var(--ink-3);
}
.media .icon{font-size:24px;display:block;margin-bottom:8px}
.media .lab{font-size:11px;text-transform:uppercase;letter-spacing:.1em;font-weight:700;color:var(--ink-3)}
.media .desc{font-size:14.5px;margin-top:6px;line-height:1.5}
.media.filled{border-style:solid;padding:0;overflow:hidden;background:#000}
.media.filled iframe,.media.filled img{display:block;width:100%;border:0}

/* ---------- calculator embed ---------- */
.calc-embed{border:1px solid var(--rule);border-radius:12px;overflow:hidden;margin:26px 0;background:var(--surface)}
.calc-embed iframe{display:block;width:100%;height:1100px;border:0}
.calc-note{font-size:14px;color:var(--ink-3);margin-top:-14px;margin-bottom:26px}

/* ---------- buttons & cta ---------- */
.btn{
  display:inline-block;background:var(--accent);color:#fff;text-decoration:none;
  padding:13px 24px;border-radius:9px;font-weight:650;font-size:16px;border:none;cursor:pointer;
  font-family:inherit;
}
.btn:hover{background:var(--accent-ink)}
@media (prefers-color-scheme: dark){
  .btn{color:#0e1412}
  .btn:hover{background:var(--accent-ink)}
}
.btn.ghost{background:transparent;color:var(--accent-ink);border:1px solid var(--rule)}
@media (prefers-color-scheme: dark){.btn.ghost{color:var(--accent)}}

/* ---------- lesson nav ---------- */
.lnav{
  display:flex;justify-content:space-between;gap:14px;margin:44px 0 0;
  padding-top:26px;border-top:1px solid var(--rule);
}
.lnav a{
  flex:1;text-decoration:none;color:var(--ink);background:var(--surface);
  border:1px solid var(--rule);border-radius:10px;padding:14px 16px;
}
.lnav a:hover{border-color:var(--accent)}
.lnav .dir{font-size:11px;text-transform:uppercase;letter-spacing:.09em;color:var(--ink-3);font-weight:700}
.lnav .ttl{font-size:15px;margin-top:4px;line-height:1.35}
.lnav a.next{text-align:right}
.lnav a.spacer{visibility:hidden}

.mark-done{
  display:flex;align-items:center;gap:10px;margin-top:30px;padding:14px 18px;
  background:var(--surface);border:1px solid var(--rule);border-radius:10px;font-size:15px;
}
.mark-done input{width:18px;height:18px;accent-color:var(--accent);cursor:pointer}
.mark-done label{cursor:pointer;color:var(--ink-2)}

/* ---------- gate ---------- */
.gate{
  position:fixed;inset:0;background:var(--bg);z-index:100;
  display:flex;align-items:center;justify-content:center;padding:24px;
}
.gate[hidden]{display:none!important}
.gate .box{max-width:420px;width:100%;text-align:center}
.gate h2{font-size:24px;margin:0 0 8px}
.gate p{color:var(--ink-2);font-size:15.5px;margin-bottom:20px}
.gate input{
  width:100%;padding:13px 15px;font:inherit;font-size:16px;text-align:center;
  background:var(--surface);color:var(--ink);border:1px solid var(--rule);border-radius:9px;margin-bottom:12px;
}
.gate input:focus{outline:2px solid var(--accent);outline-offset:1px}
.gate .err{color:var(--warn-ink);font-size:14px;min-height:20px;margin-top:10px}
.gate .btn{width:100%}
body.locked{overflow:hidden}

/* ---------- toolkit cards ---------- */
.kit{display:grid;gap:16px;margin:28px 0}
.kit a{
  display:block;text-decoration:none;color:inherit;background:var(--surface);
  border:1px solid var(--rule);border-radius:12px;padding:20px 22px;
}
.kit a:hover{border-color:var(--accent)}
.kit .kt{font-size:17.5px;font-weight:650;margin-bottom:5px}
.kit .kd{font-size:15px;color:var(--ink-2);line-height:1.55}
.kit .kf{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-3);margin-top:9px;font-weight:700}

/* ---------- landing ---------- */
.landing{max-width:760px;margin:0 auto;padding:0 24px 90px}
.landing .hero{padding:74px 0 44px}
.landing h1{font-size:44px;letter-spacing:-.03em}
.landing .hero .deck{font-size:21px;margin-bottom:30px}
.price{display:flex;align-items:baseline;gap:12px;margin-bottom:22px;flex-wrap:wrap}
.price .amt{font-size:36px;font-weight:700;letter-spacing:-.02em}
.price .note{color:var(--ink-3);font-size:15px}
.panel{background:var(--surface);border:1px solid var(--rule);border-radius:13px;padding:26px 28px;margin:30px 0}
.panel h3{margin-top:0}
.modlist{display:grid;gap:12px;margin:22px 0}
.modrow{background:var(--surface);border:1px solid var(--rule);border-radius:11px;padding:18px 20px}
.modrow .mh{font-weight:650;font-size:17px;margin-bottom:4px}
.modrow .md{color:var(--ink-2);font-size:15px;line-height:1.55}
.modrow .ml{font-size:13.5px;color:var(--ink-3);margin-top:9px;line-height:1.6}
.faq details{border-bottom:1px solid var(--rule);padding:14px 0}
.faq summary{cursor:pointer;font-weight:650;font-size:16.5px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"→ ";color:var(--accent)}
.faq details[open] summary::before{content:"↓ "}
.faq .a{color:var(--ink-2);font-size:16px;padding-top:10px;line-height:1.62}
footer.site{border-top:1px solid var(--rule);margin-top:50px;padding-top:22px;color:var(--ink-3);font-size:13.5px;line-height:1.7}

@media (max-width:600px){
  body{font-size:16.5px}
  h1{font-size:29px}
  .landing h1{font-size:33px}
  .deck{font-size:18px}
  h2{font-size:20px}
  .wrap{padding:0 18px}
  .landing{padding:0 18px 70px}
  .landing .hero{padding:44px 0 30px}
  .lnav{flex-direction:column}
  .calc-embed iframe{height:1500px}
}
@media print{
  .side,.topbar,.lnav,.mark-done,.gate{display:none!important}
  .shell{display:block}
  body{background:#fff}
}