/* Aetherion Learn: teacher pages (teachers.html and guides/*.html). Light and dark aware, print friendly. */
@font-face{font-family:Cinzel;src:url(/fonts/cinzel-latin.woff2) format("woff2");font-display:swap}
@font-face{font-family:Manrope;src:url(/fonts/manrope-latin.woff2) format("woff2");font-display:swap}
:root{--bg:#0b0e20;--card:#121633;--ink:#eef1ff;--muted:#b4bde3;--line:#2a3160;--accent:#9fb2ff;--gold:#ffd479;--btn:#3b4fd6}
@media (prefers-color-scheme:light){:root{--bg:#f6f7fc;--card:#ffffff;--ink:#141833;--muted:#47506f;--line:#d9ddef;--accent:#2f45c4;--gold:#7a4f00;--btn:#2f45c4}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 Manrope,system-ui,sans-serif}
a{color:var(--accent)}
a:focus-visible,button:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:16px;background:var(--card);padding:8px 12px;z-index:9}
.wrap{max-width:1000px;margin:0 auto;padding:24px 16px 48px}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.brand{font:600 20px Cinzel,serif;letter-spacing:.14em;text-decoration:none;color:var(--ink)}
h1{font:600 clamp(28px,5vw,42px)/1.15 Cinzel,serif;letter-spacing:.04em;margin:28px 0 8px}
h2{font:600 clamp(22px,3.2vw,28px)/1.2 Cinzel,serif;margin:36px 0 10px}
h3{font-size:14px;text-transform:uppercase;letter-spacing:.09em;color:var(--gold);margin:22px 0 6px}
.lead{color:var(--muted);font-size:19px;max-width:48em}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:10px;background:var(--btn);color:#fff;text-decoration:none;font-weight:700;border:0;cursor:pointer;font-size:15px;font-family:inherit}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.row{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}
.card h4{font:600 21px/1.25 Cinzel,serif;margin:4px 0 6px}
.tag{display:inline-block;font-size:13px;color:var(--muted);margin-right:10px}
.unit{font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gold)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.steps div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
table{width:100%;border-collapse:collapse;margin:8px 0;background:var(--card);border-radius:12px;overflow:hidden}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:14px;color:var(--muted)}
kbd{display:inline-block;padding:0 6px;border:1px solid var(--line);border-radius:5px;font:13px/1.6 ui-monospace,monospace}
.chips{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0}
.chips li{border:1px solid var(--line);border-radius:999px;padding:2px 10px;font-size:15px}
.ask{border-left:4px solid var(--gold);padding:8px 12px;margin:10px 0;background:var(--card);border-radius:0 10px 10px 0}
.tx h4{margin:18px 0 4px;font-size:17px}
.note{color:var(--muted);font-size:15px}
footer{margin-top:40px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:15px;display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between}
@media print{body{background:#fff;color:#000;font-size:12pt}.top,.row,.noprint,footer .noprint{display:none!important}.card,.ask,table{border:1px solid #999;background:#fff}h3,.unit{color:#000}a{color:#000;text-decoration:none}}