:root{
  /* Фирменная палитра IXTIRIUM, снята с ixtirium.uz */
  --bg:#fafafa; --card:#fff; --ink:#1c1c1c; --muted:#7a7a7a; --line:#e5e3df;
  --accent:#ff4f20;        /* заливки: кнопки, акценты */
  --accent-ink:#d13c12;    /* тот же оранжевый, но контрастный для текста */
  --accent-soft:#fff2d9;   /* тёплый кремовый фон */
  --blue:#b4ccfa; --blue-soft:#eef4fe;
  --shadow:0 1px 2px rgba(28,28,28,.05),0 4px 16px rgba(28,28,28,.05);
  --radius:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Arial,sans-serif;}
a{color:var(--accent-ink);text-decoration:none}
a:hover{text-decoration:underline}
h1{font-size:2rem;line-height:1.2;margin:.2em 0 .6em;letter-spacing:-.02em}
h2{font-size:1.35rem;margin:2rem 0 .8rem;letter-spacing:-.01em}
h3{font-size:1.05rem;margin:0 0 .3rem}
.muted{color:var(--muted);font-size:.9rem;font-style:normal}

.top{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.9rem 1.5rem;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:700;letter-spacing:.08em;color:var(--ink);text-decoration:none}
.brand b{color:var(--accent);font-weight:700}
.brand span{display:block;font-weight:400;font-size:.7rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted)}
.top-nav{display:flex;align-items:center;gap:1.1rem;font-size:.92rem}
.who{color:var(--muted)}
main{max-width:780px;margin:0 auto;padding:2rem 1.5rem 5rem}
main.wide{max-width:1060px}

.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:1.2rem}
.crumbs i{margin:0 .45rem;font-style:normal;opacity:.5}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent-ink)}

.module{margin-bottom:2.5rem}
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.1rem 1.2rem;box-shadow:var(--shadow)}
.card.course{position:relative;color:inherit;text-decoration:none;transition:.15s}
.card.course:hover{border-color:var(--accent);transform:translateY(-2px);text-decoration:none}
.card.course .num{position:absolute;top:.8rem;right:1rem;font-size:1.6rem;font-weight:700;color:var(--blue)}

.lessons{list-style:none;counter-reset:l;padding:0;margin:1.5rem 0 0}
.lessons li{counter-increment:l}
.lessons a{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;
  background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:.85rem 1.1rem;margin-bottom:.5rem;color:inherit;text-decoration:none}
.lessons a:hover{border-color:var(--accent);text-decoration:none}
.lessons a::before{content:counter(l);color:var(--blue);font-variant-numeric:tabular-nums;min-width:1.4em}
.lesson-title{flex:1}
.lesson-meta{color:var(--muted);font-size:.83rem;white-space:nowrap}

.facts{display:flex;flex-wrap:wrap;gap:1.5rem;margin:0 0 1.5rem;padding:.9rem 1.1rem;
  background:var(--accent-soft);border-radius:10px}
.facts div{margin:0}
.facts dt{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.facts dd{margin:0;font-weight:600}

.slides{margin:0 0 2rem}
.slides iframe{width:100%;aspect-ratio:16/9;border:1px solid var(--line);border-radius:10px;background:#000}
.slides a{display:inline-block;margin-top:.5rem}

.prose h2{font-size:1.3rem}
.prose h3{font-size:1.05rem;margin-top:1.6rem}
.prose ul,.prose ol{padding-left:1.3rem}
.prose blockquote{margin:1.2rem 0;padding:.6rem 1rem;border-left:3px solid var(--accent);
  background:var(--card);color:var(--muted)}
.prose code{background:var(--card);border:1px solid var(--line);border-radius:5px;padding:.1em .35em;font-size:.9em}

.pager{display:flex;justify-content:space-between;gap:1rem;margin-top:3rem;
  padding-top:1.2rem;border-top:1px solid var(--line);font-size:.92rem}
.pager .next{margin-left:auto;text-align:right}

.empty{text-align:center;padding:4rem 1rem;color:var(--muted)}
.empty h1{color:var(--ink)}

/* forms */
label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:.9rem}
input,select{display:block;width:100%;margin-top:.3rem;padding:.6rem .7rem;font:inherit;
  color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:9px}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
button{font:inherit;cursor:pointer}
button.primary{background:var(--accent);color:#fff;border:0;border-radius:9px;
  padding:.65rem 1.3rem;font-weight:600}
button.primary:hover{filter:brightness(1.08)}
.linkish{background:none;border:0;color:var(--accent-ink);padding:0;font-size:inherit}
.linkish:hover{text-decoration:underline}
form{display:inline}

.centered{display:grid;place-items:center;min-height:100vh}
.login{width:min(370px,92vw);padding:2rem}
.login h1{font-size:1.2rem;letter-spacing:.1em;margin-bottom:1.6rem}
.login h1 span{display:block;font-size:.72rem;font-weight:400;letter-spacing:.04em;
  text-transform:none;color:var(--muted);margin-top:.3rem}
.login button{width:100%;margin-top:.4rem}
.hint{font-size:.8rem;color:var(--muted);text-align:center;margin:1rem 0 0}
.error{background:#fdecec;color:#a32020;border-radius:8px;padding:.6rem .8rem;font-size:.87rem;margin:0 0 1rem}
.notice{background:var(--blue-soft);border:1px solid var(--blue);border-radius:10px;padding:.8rem 1rem;font-size:.92rem}
.notice code{background:#fff;padding:.15em .5em;border-radius:5px;font-size:1.05em}

/* admin */
.tabs{display:flex;gap:1.4rem;margin-bottom:1.5rem;font-size:.92rem;
  border-bottom:1px solid var(--line);padding-bottom:.7rem}
.tabs .on{color:var(--ink);font-weight:600;box-shadow:0 .7rem 0 -.63rem var(--accent)}
.grid-table{width:100%;border-collapse:collapse;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:.92rem}
.grid-table th{text-align:left;font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;
  color:var(--muted);padding:.7rem 1rem;border-bottom:1px solid var(--line)}
.grid-table td{padding:.7rem 1rem;border-bottom:1px solid var(--line);vertical-align:middle}
.grid-table tr:last-child td{border-bottom:0}
.grid-table tr.off{opacity:.5}
.actions{display:flex;gap:.9rem;flex-wrap:wrap;justify-content:flex-end}
.tag{font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;background:var(--accent-soft);
  color:var(--accent-ink);padding:.12em .5em;border-radius:20px;vertical-align:middle}
.tag.grey{background:var(--line);color:var(--muted)}
.row-form{display:flex;gap:1rem;align-items:flex-end;flex-wrap:wrap;margin-top:1rem}
.row-form label{margin:0}
.module-box{border:1px solid var(--line);background:var(--card);border-radius:var(--radius);
  padding:1rem 1.2rem;margin:0 0 1rem}
.module-box legend{font-weight:600;padding:0 .4rem}
.module-box legend button{margin-left:.6rem;font-size:.78rem;font-weight:400}
.check{display:flex;align-items:center;gap:.6rem;margin:0;padding:.35rem 0;
  color:var(--ink);font-size:.95rem;cursor:pointer}
.check input{width:auto;margin:0}
.sticky-save{position:sticky;bottom:0;display:flex;align-items:center;gap:1.2rem;
  padding:1rem 0;background:linear-gradient(transparent,var(--bg) 35%)}

@media (max-width:600px){
  main{padding:1.2rem 1rem 4rem}
  h1{font-size:1.5rem}
  .actions{justify-content:flex-start}
}

.prose table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.93rem;
  background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.prose th{text-align:left;background:var(--blue-soft);color:var(--ink);
  padding:.55rem .8rem;border-bottom:1px solid var(--line);font-size:.85rem}
.prose td{padding:.55rem .8rem;border-bottom:1px solid var(--line)}
.prose tr:last-child td{border-bottom:0}

.slides.placeholder{display:grid;place-items:center;text-align:center;aspect-ratio:16/9;
  border:2px dashed var(--line);border-radius:10px;color:var(--muted);padding:2rem;background:var(--card)}
.slides.placeholder p{margin:0;max-width:34ch;font-size:.92rem;line-height:1.6}
.slides.placeholder b{color:var(--ink)}

/* в колонке действий оранжевым только основное действие, остальное приглушено */
.actions .linkish{color:var(--muted)}
.actions .linkish:hover{color:var(--accent-ink)}
.actions a{font-weight:600}
.check input[type=checkbox]{accent-color:var(--accent);width:1.05em;height:1.05em}