:root{--primary:#173b72;--primary-2:#245ea8;--accent:#18a999;--bg:#f4f7fb;--surface:#fff;--text:#172033;--muted:#667085;--border:#dfe5ee;--danger:#b42318;--warning:#b54708;--success:#067647;--shadow:0 10px 30px rgba(23,59,114,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}a{color:inherit}.topbar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:30}.nav{max-width:1180px;margin:auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;color:var(--primary)}.brand img{height:54px;width:auto}.navlinks{display:flex;gap:18px;align-items:center}.navlinks a{text-decoration:none;color:var(--muted);font-weight:650}.navlinks a:hover{color:var(--primary)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:11px;padding:11px 17px;font-weight:750;text-decoration:none;cursor:pointer}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-2)}.btn-soft{background:#eaf1fb;color:var(--primary)}.btn-outline{border:1px solid var(--border);background:#fff;color:var(--primary)}.hero{background:linear-gradient(135deg,#173b72,#245ea8 58%,#18a999);color:#fff;padding:86px 22px}.hero-inner{max-width:1180px;margin:auto;display:grid;grid-template-columns:1.25fr .75fr;gap:34px;align-items:center}.hero h1{font-size:clamp(2.2rem,5vw,4.2rem);line-height:1.04;margin:0 0 18px}.hero p{font-size:1.12rem;max-width:720px;color:#eaf2ff}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:20px;padding:22px;backdrop-filter:blur(8px)}.container{max-width:1180px;margin:auto;padding:46px 22px}.section-title{margin-bottom:22px}.section-title h2{font-size:2rem;margin:0 0 8px}.section-title p{margin:0;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:24px;box-shadow:var(--shadow)}.card h3{margin-top:0}.muted{color:var(--muted)}.badge{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eaf1fb;color:var(--primary);font-size:.8rem;font-weight:800}.dashboard{min-height:100vh;display:grid;grid-template-columns:260px 1fr}.sidebar{background:#102f5a;color:#fff;padding:24px 18px}.sidebar .brand{color:#fff;margin-bottom:28px}.sidebar nav{display:grid;gap:8px}.sidebar nav a{color:#dbe8fa;text-decoration:none;padding:11px 12px;border-radius:9px}.sidebar nav a:hover,.sidebar nav a.active{background:rgba(255,255,255,.12);color:#fff}.main{padding:28px}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:24px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:22px}.stat{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px}.stat strong{display:block;font-size:1.55rem;color:var(--primary)}.list{display:grid;gap:12px}.list-item{background:#fff;border:1px solid var(--border);border-radius:13px;padding:16px;display:flex;align-items:center;justify-content:space-between;gap:14px}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#eaf1fb,#f7fbff)}.login-card{width:min(440px,100%);background:#fff;border:1px solid var(--border);border-radius:20px;padding:30px;box-shadow:var(--shadow)}.login-card .brand{justify-content:center;margin-bottom:18px}.field{margin-bottom:15px}.field label{display:block;font-weight:750;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:12px;border:1px solid #cfd7e3;border-radius:10px;font:inherit}.field input:focus,.field select:focus,.field textarea:focus{outline:3px solid #dceafd;border-color:var(--primary-2)}.notice{padding:12px 14px;border-radius:10px;background:#fff6e8;color:#7a4300;font-size:.9rem;margin:14px 0}.footer{padding:35px 22px;text-align:center;color:var(--muted)}.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.course-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px}.progress{height:9px;border-radius:999px;background:#e8edf5;overflow:hidden}.progress span{display:block;height:100%;background:var(--accent)}
@media(max-width:900px){.hero-inner,.grid,.course-grid{grid-template-columns:1fr}.dashboard{grid-template-columns:1fr}.sidebar{display:none}.stats{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.navlinks{display:none}.main{padding:18px}.stats{grid-template-columns:1fr}.page-head{display:block}}

/* ===== Sefirá v3 · Gestor de contenidos docente ===== */
.teacher-top{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:22px}.teacher-profile{display:flex;align-items:center;gap:10px}.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:#dceafd;color:var(--primary);font-weight:900}.content-types{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin:18px 0 22px}.type-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px 12px;text-align:center;cursor:pointer;transition:.18s ease;min-height:140px}.type-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.type-card.active{border:2px solid #2684ff;background:#f5f9ff}.type-icon{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;margin:0 auto 10px;background:#eaf1fb;font-size:1.4rem}.type-card strong{display:block;font-size:1.02rem}.type-card small{display:block;color:var(--muted);margin-top:4px}.creator-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:18px}.creator-card{background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:var(--shadow)}.creator-card h2,.creator-card h3{margin-top:0}.form-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.delivery-options{display:flex;gap:8px;flex-wrap:wrap}.delivery-option{border:1px solid var(--border);background:#fff;border-radius:10px;padding:9px 12px;cursor:pointer}.delivery-option input{margin-right:6px}.dropzone{border:2px dashed #acd0ff;border-radius:14px;padding:24px;text-align:center;background:#f8fbff;cursor:pointer;transition:.18s ease}.dropzone.dragover{border-color:#2684ff;background:#edf6ff}.dropzone strong{display:block;color:var(--primary);font-size:1.02rem}.file-list{margin-top:10px;display:grid;gap:6px}.file-chip{display:flex;justify-content:space-between;gap:8px;align-items:center;background:#f4f7fb;border:1px solid var(--border);padding:8px 10px;border-radius:9px;font-size:.88rem}.template-list{display:grid;gap:8px}.template-btn{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;text-align:left;border:1px solid var(--border);background:#fff;border-radius:11px;padding:11px 12px;cursor:pointer}.template-btn:hover{background:#f7faff}.template-btn strong{display:block}.template-btn small{color:var(--muted)}.group-checks{display:grid;gap:9px}.group-check{display:flex;align-items:flex-start;gap:9px}.group-check input{margin-top:4px}.creator-actions{display:flex;justify-content:space-between;gap:12px;margin-top:18px}.success-box{display:none;margin-top:14px;padding:12px 14px;border-radius:11px;background:#ecfdf3;color:var(--success);border:1px solid #abefc6}.success-box.show{display:block}.activity-table{width:100%;border-collapse:collapse}.activity-table th,.activity-table td{text-align:left;padding:11px 8px;border-bottom:1px solid var(--border);vertical-align:top}.activity-pill{display:inline-flex;padding:4px 8px;border-radius:999px;font-size:.76rem;font-weight:800;background:#eef4ff;color:#264d86}.side-note{background:#edf7ff;color:#24527a;padding:11px 12px;border-radius:10px;font-size:.88rem;margin-top:12px}.mini-actions{display:flex;gap:8px;flex-wrap:wrap}.dashboard.sidebar-light{grid-template-columns:240px 1fr}.sidebar.sidebar-v3{background:#fff;color:var(--text);border-right:1px solid var(--border)}.sidebar.sidebar-v3 .brand{color:var(--primary)}.sidebar.sidebar-v3 nav a{color:#526174}.sidebar.sidebar-v3 nav a:hover,.sidebar.sidebar-v3 nav a.active{background:#e9f8f6;color:#087c78}.sidebar.sidebar-v3 .sidebar-foot{margin-top:36px;color:var(--muted);font-size:.86rem;padding:12px}.top-search{max-width:440px;width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:11px;background:#f5f7fa}.field-help{font-size:.8rem;color:var(--muted);margin-top:5px}.required::after{content:' *';color:#d92d20}.hidden{display:none!important}
@media(max-width:1080px){.creator-layout{grid-template-columns:1fr}.content-types{grid-template-columns:repeat(3,1fr)}}
@media(max-width:720px){.content-types{grid-template-columns:1fr 1fr}.form-grid-2{grid-template-columns:1fr}.creator-actions{flex-direction:column}.teacher-top{align-items:flex-start;flex-direction:column}}

/* v3.1 hardening helpers */
.login-message{color:var(--danger,#b42318)}
.btn-block{width:100%}