/* ===== Academia IA — estilos ===== */
:root{
  --ink:#1E1B4B;          /* morado oscuro (barra superior) */
  --ink-2:#2E2A6B;
  --primary:#5B3FD1;      /* botones */
  --primary-h:#4A30B8;
  --accent:#FBBF24;       /* dorado */
  --pink:#DB2777;
  --text:#1F1D2B;
  --muted:#6B6880;
  --line:#E7E5EF;
  --bg:#FFFFFF;
  --soft:#F6F5FB;
  --ok:#0F7A4A;
  --err:#B42318;
  --radius:12px;
  --display:'Bricolage Grotesque', system-ui, sans-serif;
  --body:'DM Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--body);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--primary)}
a:hover{color:var(--primary-h)}
h1,h2,h3{font-family:var(--display);line-height:1.15;margin:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.wrap{width:100%;max-width:1220px;margin:0 auto;padding:0 16px}
.muted{color:var(--muted)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:10px 20px;border-radius:8px;border:2px solid transparent;font:700 16px/1.2 var(--body);text-decoration:none;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.btn--primary{background:var(--primary);color:#fff}
.btn--primary:hover{background:var(--primary-h);color:#fff}
.btn--accent{background:var(--accent);color:var(--ink)}
.btn--accent:hover{background:#F59E0B;color:var(--ink)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn--ghost-dark{background:transparent;border-color:rgba(255,255,255,.35);color:#fff}
.btn--ghost-dark:hover{border-color:#fff}
.btn--danger{background:transparent;border-color:#F3C9C4;color:var(--err)}
.btn--danger:hover{background:#FDECEA}
.btn--block{display:flex;width:100%}
.btn--small{min-height:36px;padding:6px 12px;font-size:14px;border-radius:6px;background:var(--soft);color:var(--text)}
.btn--small.btn--primary{background:var(--primary);color:#fff}
.btn--small.btn--ghost{background:transparent}
.btn--small.btn--danger{background:transparent}
.btn b{font-weight:800}

/* ---------- Barra superior ---------- */
.topbar{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20}
.topbar__inner{max-width:1220px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:24px;min-height:64px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font:800 24px/1 var(--display);letter-spacing:-.5px}
.logo:hover{color:#fff}
.logo svg{color:var(--accent)}
.logo__badge{font:700 12px/1 var(--body);background:var(--accent);color:var(--ink);padding:4px 8px;border-radius:999px;letter-spacing:.5px}
.topnav{display:flex;gap:20px}
.topnav a{color:#E4E1FA;text-decoration:none;font-weight:500;padding:8px 0;border-bottom:2px solid transparent}
.topnav a:hover,.topnav a.is-active{color:#fff;border-color:var(--accent)}
.search{flex:1;min-width:200px;display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.1);border-radius:8px;padding:0 14px;color:#CFCBEF}
.search:focus-within{background:rgba(255,255,255,.16)}
.search input{flex:1;background:transparent;border:0;color:#fff;font:16px var(--body);min-height:42px;outline:none}
.search input::placeholder{color:#B9B4E3}
.topbar__cta{margin-left:auto}

/* ---------- Migas ---------- */
.crumbs{border-bottom:1px solid var(--line);font-size:14px}
.crumbs .wrap{display:flex;gap:10px;align-items:center;min-height:48px;flex-wrap:wrap}
.crumbs a{color:var(--text);text-decoration:none}
.crumbs a:hover{color:var(--primary)}
.crumbs span{color:var(--muted)}

/* ---------- Hero ---------- */
.hero{background:var(--ink);color:#fff;overflow:hidden}
.hero__inner{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:40px;align-items:center;padding-top:56px;padding-bottom:56px;position:relative}
.hero h1{font-size:clamp(40px,6vw,72px);font-weight:800;letter-spacing:-1.5px;margin:18px 0 16px}
.hero h1 span{color:var(--accent);display:block}
.hero p{font-size:19px;color:#DDD6FE;max-width:620px;margin:0 0 28px}
.hero__art{color:#8B85E8;opacity:.45;width:100%;max-width:380px;justify-self:end}
.pill{display:inline-block;background:var(--accent);color:var(--ink);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;padding:7px 16px;border-radius:999px}

/* ---------- Layout catálogo ---------- */
.layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;padding-top:40px;padding-bottom:72px}
.sidebar h2{font:700 16px/1.3 var(--body);margin:0 0 14px}
.sidebar ul{list-style:none;margin:0 0 28px;padding:0 0 24px;border-bottom:1px solid var(--line)}
.sidebar li a{display:flex;justify-content:space-between;gap:8px;color:var(--muted);text-decoration:none;padding:6px 0 6px 10px;margin-left:-10px;border-left:3px solid transparent;font-size:15px}
.sidebar li a:hover{color:var(--text)}
.sidebar li a.is-active{color:var(--text);font-weight:700;border-left-color:var(--primary)}
.sidebar .count{font-size:12px;background:var(--soft);color:var(--muted);border-radius:999px;padding:1px 8px;align-self:center}
.sidebar__toggle{display:none}

.catalog__head{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.catalog__head h2{font-size:28px;font-weight:600}
.sort{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}
.sort select{font:700 15px var(--body);color:var(--text);border:0;border-bottom:1px solid var(--text);background:transparent;padding:8px 4px;min-height:40px;cursor:pointer}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:28px}
.empty{text-align:center;padding:60px 20px;background:var(--soft);border-radius:var(--radius)}

/* ---------- Tarjeta ---------- */
.card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 1px 3px rgba(30,27,75,.08),0 6px 18px rgba(30,27,75,.06);display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);box-shadow:0 2px 6px rgba(30,27,75,.1),0 14px 30px rgba(30,27,75,.12)}
.card__media{position:relative;display:block;aspect-ratio:16/9;background:var(--ink);overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover}
.card__media::after{content:"";position:absolute;inset:auto 0 0 0;height:48%;background:linear-gradient(to top,rgba(10,8,30,.75),transparent);pointer-events:none}
.card__tags{position:absolute;top:12px;left:12px;display:flex;gap:6px;flex-wrap:wrap;z-index:1}
.card__tags--static{position:static;margin-bottom:14px}
.tag{font:800 11px/1 var(--body);letter-spacing:.3px;padding:6px 9px;border-radius:999px}
.tag--0{background:var(--accent);color:var(--ink)}
.tag--1{background:var(--pink);color:#fff}
.tag--2{background:#fff;color:var(--primary);box-shadow:inset 0 0 0 2px var(--primary)}
.card__meta{position:absolute;left:12px;right:12px;bottom:10px;display:flex;justify-content:space-between;align-items:center;color:#fff;font-weight:700;font-size:13px;z-index:1}
.card__meta span{display:inline-flex;align-items:center;gap:5px}
.dots{display:inline-flex;gap:3px;margin-right:3px}
.dots i{width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.5)}
.dots i:first-child{background:#fff}
.card__body{padding:16px 14px 14px;display:flex;flex-direction:column;gap:10px;flex:1}
.card__title{font:600 18px/1.3 var(--body)}
.card__title a{color:var(--text);text-decoration:none}
.card__title a:hover{color:var(--primary)}
.card__row{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted)}
.card__author{color:var(--text)}
.card__stats{display:flex;gap:12px}
.card__stats span{display:inline-flex;align-items:center;gap:4px}
.card__price{font-size:14px;min-height:21px;margin-top:auto}
.discount{color:var(--err);font-weight:700}
.card__price s,.enroll s{color:var(--err);opacity:.8}
.free{color:var(--ok);font-weight:700}

/* ---------- Página de curso ---------- */
.course-hero{background:var(--ink);color:#fff}
.course-hero__inner{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:48px;align-items:center;padding-top:48px;padding-bottom:48px}
.course-hero h1{font-size:clamp(34px,4.6vw,54px);font-weight:800;letter-spacing:-1px}
.lead{font-size:19px;color:#DDD6FE;margin:16px 0 8px}
.byline{color:#C4BEF0;margin:0 0 24px}
.byline b{color:#fff}
.facts{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:12px}
.facts li{background:var(--ink-2);border:1px solid #4C46A0;border-radius:10px;padding:10px 16px;display:flex;flex-direction:column}
.facts span{font-size:12px;color:#C4BEF0;text-transform:uppercase;letter-spacing:1px}
.facts b{font-size:16px}
.course-hero__img{border-radius:var(--radius);width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;box-shadow:0 20px 50px rgba(0,0,0,.35)}

.course{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:56px;padding-top:48px;padding-bottom:80px;align-items:start}
.course__main section{margin-bottom:44px}
.course__main h2{font-size:28px;margin-bottom:16px}
.course__main p{font-size:17px;margin:0 0 14px;color:#38354A}
.syllabus{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.syllabus li{display:flex;gap:18px;align-items:baseline;padding:16px 0;border-bottom:1px solid var(--line);font-size:17px}
.syllabus .num{font:800 15px var(--display);color:var(--primary);min-width:26px}
.course__aside{position:sticky;top:88px}
.enroll{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 10px 30px rgba(30,27,75,.08);display:flex;flex-direction:column;gap:14px}
.enroll__price{display:flex;flex-direction:column;gap:4px}
.enroll__price b{font:800 32px/1.1 var(--display)}
.seats{margin:0;font-weight:700;color:var(--primary)}
.seats--low{color:var(--err)}

/* ---------- Formularios ---------- */
.form{display:flex;flex-direction:column;gap:14px}
.form h2{font-size:22px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-weight:700;font-size:14px}
.opt{font-weight:400;color:var(--muted)}
.field input,.field select,.field textarea,.inline input,.filters select{font:16px var(--body);color:var(--text);border:1.5px solid #CFCBE0;border-radius:8px;padding:10px 12px;min-height:44px;background:#fff;width:100%}
.field textarea{resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus,.inline input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px rgba(91,63,209,.18)}
.field [aria-invalid="true"]{border-color:var(--err)}
.err{color:var(--err);font-size:13px}
.field-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.fine{font-size:13px;color:var(--muted);margin:0;text-align:center}
.hp{position:absolute;left:-9999px}
.alert{padding:12px 16px;border-radius:8px;font-weight:500}
.alert--ok{background:#E7F6EE;color:var(--ok);border:1px solid #B5E2C9}
.alert--err{background:#FDECEA;color:var(--err);border:1px solid #F3C9C4}
.check{display:flex;align-items:center;gap:10px;min-height:44px;font-weight:500;cursor:pointer}
.check input{width:20px;height:20px;accent-color:var(--primary)}

/* ---------- Pie ---------- */
.footer{background:var(--ink);color:#DDD6FE}
.footer__inner{max-width:1220px;margin:0 auto;padding:40px 16px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.footer__brand{font:800 24px var(--display);color:#fff;margin-bottom:6px}
.footer p{margin:0}
.footer__contact{display:flex;gap:12px;flex-wrap:wrap}
.footer .btn--ghost{color:#fff;border-color:rgba(255,255,255,.35)}
.footer .btn--ghost:hover{border-color:var(--accent);color:var(--accent)}
.footer__legal{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:16px;font-size:13px;color:#B9B4E3}

/* ---------- Panel de administración ---------- */
.admin{background:var(--soft)}
.admin-main{padding-top:32px;padding-bottom:64px;display:flex;flex-direction:column;gap:20px}
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.admin-head h1{font-size:32px}
.admin-sub{font-size:22px;margin-top:20px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.stat{background:#fff;border-radius:var(--radius);padding:18px 20px;border:1px solid var(--line);display:flex;flex-direction:column;text-decoration:none;color:var(--text)}
.stat span{color:var(--muted);font-size:14px}
.stat b{font:800 34px var(--display)}
.stat--link:hover{border-color:var(--primary);color:var(--text)}
.table-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius);border:1px solid var(--line)}
.table{width:100%;border-collapse:collapse;font-size:15px}
.table th{text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);padding:12px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.table td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.table tr:last-child td{border-bottom:0}
.tcourse{display:flex;align-items:center;gap:12px;min-width:220px}
.tcourse img{width:72px;height:40px;object-fit:cover;border-radius:6px}
.actions{display:flex;gap:8px;align-items:center;justify-content:flex-end;flex-wrap:wrap}
.actions form,.cat-row form{margin:0}
.badge{display:inline-block;background:#FEF3C7;color:#92400E;font-size:12px;font-weight:700;padding:2px 8px;border-radius:999px}
.status{display:inline-block;font-size:13px;font-weight:700;padding:3px 10px;border-radius:999px;background:#EEEDF3;color:var(--muted)}
.status--on{background:#E7F6EE;color:var(--ok)}
.nowrap{white-space:nowrap}
.inline{display:flex;gap:8px;align-items:center}
.inline input{min-height:36px;padding:6px 10px;max-width:280px}
.cats{background:#fff;border-radius:var(--radius);border:1px solid var(--line);padding:8px 16px}
.cat-row{display:flex;align-items:center;gap:16px;padding:10px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.cat-row .inline{flex:1}
.cat-new{padding:12px 0}
.filters{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-weight:700;font-size:14px}
.filters select{width:auto;min-width:180px}
.estado{font:700 13px var(--body);border-radius:999px;padding:6px 10px;border:1.5px solid var(--line);min-height:36px;cursor:pointer;background:#fff}
.estado--nuevo{background:#FEF3C7;border-color:#FCD34D;color:#92400E}
.estado--confirmado,.estado--pagado{background:#E7F6EE;border-color:#B5E2C9;color:var(--ok)}
.estado--cancelado{background:#FDECEA;border-color:#F3C9C4;color:var(--err)}
details summary{cursor:pointer;color:var(--primary);font-size:13px;margin-top:4px}
details p{margin:6px 0 0;font-size:14px;max-width:340px}
.admin-form{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:24px;align-items:start}
.admin-form__main,.admin-form__side{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:16px}
.preview{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;border-radius:8px}
.login{max-width:420px;margin:40px auto;width:100%}
.login h1{font-size:28px}

/* ---------- Responsive ---------- */
@media (max-width: 960px){
  .hero__inner,.course-hero__inner{grid-template-columns:1fr}
  .hero__art{display:none}
  .course{grid-template-columns:1fr;gap:32px}
  .course__aside{position:static}
  .admin-form{grid-template-columns:1fr}
}
@media (max-width: 760px){
  .topbar__inner{gap:12px}
  .topnav{display:none}
  .search{order:3;flex-basis:100%}
  .layout{grid-template-columns:1fr;gap:20px;padding-top:24px}
  .sidebar__toggle{display:flex;width:100%;justify-content:space-between;align-items:center;min-height:44px;padding:10px 14px;border:1.5px solid var(--line);border-radius:8px;background:#fff;font:700 15px var(--body);color:var(--text);cursor:pointer}
  .sidebar__toggle::after{content:"+";font-size:20px}
  .sidebar__toggle[aria-expanded="true"]::after{content:"–"}
  .sidebar__panel{display:none;padding-top:20px}
  .sidebar__panel.is-open{display:block}
  .catalog__head h2{font-size:24px}
  .field-row{grid-template-columns:1fr}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;scroll-behavior:auto!important}
}