/* V6 · Aula de estudio, selector claro y visor de material compartido */
.study-mode-box{border:1px solid #dce6f2;background:linear-gradient(135deg,#fff,#f7faff);border-radius:18px;padding:20px;margin-bottom:20px}
.study-modes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.study-mode-card{appearance:none;border:1.5px solid #dbe5f2;border-radius:15px;padding:18px;text-align:left;background:#fff;display:flex;flex-direction:column;gap:7px;align-items:flex-start;color:#203756;min-width:0;transition:background .18s,border-color .18s,transform .18s}
.study-mode-card:hover{transform:translateY(-1px);border-color:#93afd5}
.study-mode-card.active{background:#ecf3ff;border-color:#386bc4;box-shadow:0 0 0 2px #386bc414}
.study-mode-title{font-size:14px;font-weight:850;letter-spacing:-.3px}
.study-mode-card strong{font-size:23px;line-height:1.15;letter-spacing:-.6px;color:#174990}
.study-mode-card small{font-size:12px;line-height:1.5;color:#667c98}
.study-mode-help{margin:14px 2px 0!important}
.study-cta-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:14px 0 25px}
.study-cta-row .btn{min-width:0;height:auto;min-height:48px;font-size:13px;white-space:normal}
.study-module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin-bottom:24px}
.study-module,.study-doc-card{min-width:0;display:flex;flex-direction:column;padding:20px;background:#fff;border:1px solid #dfe7f2;border-radius:16px;box-shadow:0 5px 17px #233f6c09}
.study-module h3,.study-doc-card h3{font-size:16px;letter-spacing:-.35px;line-height:1.36;margin:9px 0 7px;color:#1f375b}
.study-module p,.study-doc-card p{font-size:12px;color:#71839b;line-height:1.65;margin:0 0 17px;flex:1}
.study-module-meta,.study-doc-kicker{font-size:10px;color:#3566a8;text-transform:uppercase;font-weight:790;letter-spacing:.6px}
.study-link{display:inline-flex;gap:7px;align-items:center;align-self:flex-start;font-size:12px;text-decoration:none;font-weight:760;color:#265cb0}
.study-link .icon-svg,.study-doc-open .icon-svg{width:14px;height:14px}
.study-filters{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:16px}
.study-doc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.study-doc-buttons{display:flex;align-items:center;flex-wrap:wrap;gap:9px}
.study-doc-open,.study-doc-read{border:1px solid #d9e5f6;border-radius:10px;padding:10px 12px;background:#eef4ff;text-decoration:none;font-weight:780;font-size:12px;color:#2459a2;display:flex;align-items:center;gap:6px}
.study-doc-read{background:#fff;color:#607793}
.study-doc-open:hover,.study-doc-read:hover{border-color:#7ca4da}
.study-reader{margin:23px 0;padding:18px;border-radius:16px;background:#fff;border:1px solid #dfe7f2}
.study-reader .panel-head{gap:10px}.study-reader h2{margin:0;font-size:17px}
.study-reader iframe{width:100%;height:min(78vh,800px);border:1px solid #e5eaf3;border-radius:11px;background:#f4f6fb;margin:10px 0}
.study-notice{margin:22px 0}
@media(max-width:1000px) and (min-width:800px){.study-module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.site-toolbar .bottom-nav .navitem{padding:0 8px!important;font-size:11px!important}}
@media(max-width:799px){.study-mode-box{padding:14px}.study-modes{gap:8px}.study-mode-card{padding:14px 10px}.study-mode-title{font-size:12px}.study-mode-card strong{font-size:18px}.study-mode-card small{font-size:10px}.study-cta-row{grid-template-columns:1fr}.study-module-grid,.study-doc-grid{grid-template-columns:1fr}.study-module,.study-doc-card{padding:17px}.site-toolbar .bottom-nav .navitem{font-size:8.3px;letter-spacing:-.2px}.site-toolbar .bottom-nav .navitem .icon-svg{width:18px;height:18px}.study-reader iframe{height:55vh}}
@media(max-width:360px){.site-toolbar .bottom-nav .navitem{font-size:7.7px}.study-mode-card strong{font-size:16px}}
body.dark .study-mode-box,body.dark .study-module,body.dark .study-doc-card,body.dark .study-reader{background:#192b41;border-color:#344a68}
body.dark .study-mode-card{background:#203450;border-color:#3d5471;color:#ecf4ff}
body.dark .study-mode-card.active{background:#284974;border-color:#76a0e0}
body.dark .study-mode-card strong,body.dark .study-module h3,body.dark .study-doc-card h3{color:#d7e8ff}
body.dark .study-mode-card small,body.dark .study-module p,body.dark .study-doc-card p{color:#b2c4dd}
body.dark .study-mode-title{color:#edf5ff}
body.dark .study-doc-read{background:#213951;color:#dce9ff}