:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:#152b46;background:#f4f7fb}*{box-sizing:border-box}body{margin:0}header{display:flex;align-items:center;gap:14px;background:white;padding:12px 16px;border-bottom:1px solid #dce4ef}header img{width:62px;height:62px;object-fit:contain}h1{font-size:1.3rem;margin:0}small,.muted{color:#63758b}nav{display:flex;position:sticky;top:0;background:white;border-bottom:1px solid #dce4ef;z-index:2}nav button{flex:1;border:0;background:white;padding:15px 4px;font-weight:650;color:#5e7087}nav .active{color:#173e80;border-bottom:3px solid #173e80}main{max-width:850px;margin:16px auto;padding:0 12px 30px}.card{background:white;border:1px solid #dfe7f1;border-radius:14px;padding:16px;margin:12px 0;box-shadow:0 2px 8px #173e8010}h2{font-size:1.15rem;margin:0 0 12px}h3{font-size:1rem;margin:4px 0 8px}.row{display:flex;align-items:center;justify-content:space-between;gap:10px}.tag{display:inline-block;border-radius:30px;padding:4px 9px;background:#e7edf8;color:#20447c;font-size:.77rem}.danger{background:#ffebeb;color:#a02b2b}.good{background:#e7f6ed;color:#19643d}button.primary{background:#193f80;color:white;border:0;padding:11px 16px;border-radius:9px;font-weight:650}button.secondary{background:#edf2fa;color:#193f80;border:0;padding:9px 12px;border-radius:9px}button{cursor:pointer}label{display:block;font-size:.87rem;font-weight:650;margin:12px 0 5px}input,select,textarea{font:inherit;width:100%;padding:10px;border:1px solid #c8d5e5;border-radius:9px;background:white}textarea{min-height:75px}.check{display:flex;gap:8px;align-items:center;margin:12px 0}.check input{width:auto}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat{background:#f0f4fa;padding:12px;border-radius:10px}.stat b{font-size:1.5rem;display:block}.session{border-left:4px solid #3167b3}.session.done{border-left-color:#2c9c68}.session time{color:#657992;font-size:.82rem}.item{border-bottom:1px solid #e8edf4;padding:10px 0}.item:last-child{border:0}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.hint{font-size:.83rem;color:#5f7188}.warning{background:#fff4e3;padding:12px;border-radius:10px;color:#704b13}footer{text-align:center;padding:15px;color:#6b7c90;font-size:.75rem}@media(min-width:650px){header{justify-content:center}.grid{grid-template-columns:repeat(3,1fr)}}

@media(max-width:480px){nav button{font-size:.82rem;padding:13px 2px}}

.grade-entry{padding:8px 0;border-top:1px solid #e6edf5}.grade-controls{display:flex;gap:10px;align-items:center}.grade-controls button{white-space:nowrap}.auditpre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:.72rem;background:#f1f4f8;padding:10px;border-radius:8px}details{margin-top:5px}summary{cursor:pointer;color:#193f80;font-size:.85rem}

/* Cuadro visual de calificaciones */
.score-table-wrap{overflow-x:auto}.score-table{width:100%;border-collapse:collapse;font-size:.88rem}.score-table th{text-align:left;background:#f1f5fb;color:#203c63}.score-table td,.score-table th{padding:10px 8px;border-bottom:1px solid #e4eaf3;vertical-align:middle}.score-table td:last-child,.score-table th:last-child{text-align:right}.score-pill{display:inline-block;border-radius:7px;padding:4px 7px;margin:2px;background:#eaf3ed;color:#216044;font-weight:650;font-variant-numeric:tabular-nums}.score-pill.score-low{background:#fceae8;color:#9d3430}.delete-button{color:#9d3430!important;background:#fff1ef!important}.grade-controls{flex-wrap:wrap;justify-content:flex-end}@media(max-width:480px){.score-table{font-size:.78rem}.score-table td,.score-table th{padding:9px 5px}}

/* v1.3 Android: barra de navegación desplazable, sin solapar pestañas. */
nav{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scrollbar-width:thin;align-items:stretch;gap:2px}
nav button{flex:0 0 auto;min-width:78px;white-space:nowrap;padding:13px 12px}
nav a{flex:0 0 auto;white-space:nowrap}
@media(max-width:650px){nav button{font-size:.88rem;padding:13px 12px;min-width:78px}header{padding:10px 12px}header img{width:52px;height:52px}.card{padding:14px}}