:root{
  --ink:#10263b; --ink-2:#34495e; --muted:#6b7c8d; --line:#e4eaf0; --bg:#f5f7fa; --card:#fff;
  --primary:#0e7c86; --primary-d:#0a5f67; --accent:#f2a93b; --sidebar:#10263b;
  --bs-primary:#0e7c86; --bs-primary-rgb:14,124,134; --bs-link-color:#0e7c86; --bs-link-hover-color:#0a5f67;
  --bs-body-font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif; --bs-body-color:#1c2b3a; --bs-border-radius:.6rem;
}
body{background:var(--bg);font-size:.95rem}
h1,h2,h3,.page-title,.hero h1{font-family:'Fraunces',Georgia,serif;color:var(--ink)}
.btn-primary{--bs-btn-bg:var(--primary);--bs-btn-border-color:var(--primary);--bs-btn-hover-bg:var(--primary-d);--bs-btn-hover-border-color:var(--primary-d);--bs-btn-active-bg:var(--primary-d)}
.btn-outline-primary{--bs-btn-color:var(--primary);--bs-btn-border-color:var(--primary);--bs-btn-hover-bg:var(--primary);--bs-btn-hover-border-color:var(--primary)}
.btn:focus-visible,.form-control:focus,.form-select:focus,a:focus-visible{outline:3px solid rgba(242,169,59,.6);outline-offset:1px;box-shadow:none}
.brand{display:flex;align-items:center;gap:.6rem;font-family:'Fraunces',serif;font-weight:700;font-size:1.15rem;color:var(--ink);text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:1.05rem}

/* app shell */
.topbar{position:sticky;top:0;z-index:1030;height:60px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:.75rem;padding:0 1rem}
.shell{display:flex;min-height:calc(100vh - 60px)}
.sidebar{width:236px;flex:0 0 236px;background:var(--sidebar);padding:.75rem .6rem}
.sidebar .nav-link{display:flex;align-items:center;gap:.7rem;color:#b9c7d4;padding:.55rem .8rem;border-radius:.55rem;font-weight:500}
.sidebar .nav-link i{font-size:1.05rem;width:1.2rem}
.sidebar .nav-link:hover{background:rgba(255,255,255,.07);color:#fff}
.sidebar .nav-link.active{background:var(--primary);color:#fff}
@media (max-width:991.98px){.sidebar{background:var(--sidebar);width:260px;flex-basis:auto}}
.content{flex:1;min-width:0;padding:1.5rem}
.page-title{font-size:1.6rem;margin:0}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--ink);font-weight:700;font-size:.75rem;display:grid;place-items:center}
.badge-dot{position:absolute;top:-4px;right:-4px;background:#d9453b;color:#fff;border-radius:10px;font-size:.65rem;padding:1px 6px;font-weight:600}

/* cards */
.card{border:1px solid var(--line);border-radius:.85rem;box-shadow:0 1px 2px rgba(16,38,59,.04)}
.card-header{background:#fff;border-bottom:1px solid var(--line);font-weight:600;border-radius:.85rem .85rem 0 0!important}
.stat{display:flex;gap:.9rem;align-items:center;padding:1rem 1.1rem}
.stat .ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:1.25rem;background:#e6f3f4;color:var(--primary)}
.stat .num{font-size:1.55rem;font-weight:700;line-height:1;color:var(--ink)}
.stat .lbl{color:var(--muted);font-size:.8rem;margin-top:.2rem}
.stat.amber .ico{background:#fdf1dc;color:#b97a0c}.stat.rose .ico{background:#fce8e6;color:#c2372d}.stat.violet .ico{background:#ece9fb;color:#5b45c9}
.table>:not(caption)>*>*{padding:.65rem .8rem}
.table thead th{font-size:.74rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);font-weight:600;border-bottom-width:1px;background:#fafbfc;white-space:nowrap}
.table-responsive{border-radius:.85rem}
.empty{text-align:center;padding:2.5rem 1rem;color:var(--muted)}.empty i{font-size:2.2rem;display:block;margin-bottom:.4rem;color:#a9b7c4}
.progress{height:.9rem;border-radius:1rem;background:#e9eef3}.progress-bar{font-size:.68rem;font-weight:600}
.session-card{border-left:4px solid var(--primary)}
.session-card.live{border-left-color:#d9453b}
.dl-row{display:flex;gap:.75rem;align-items:center;padding:.6rem 0;border-bottom:1px dashed var(--line)}.dl-row:last-child{border:0}
.ft-ico{width:36px;height:36px;border-radius:9px;background:#eef3f7;display:grid;place-items:center;color:var(--ink-2);flex:0 0 auto}
.lesson-body{line-height:1.7}.lesson-body img{max-width:100%}
.passage{background:#fbf8ef;border:1px solid #efe4bf;border-radius:.6rem;padding:1rem;white-space:pre-wrap;max-height:340px;overflow:auto;line-height:1.65}
.q-card{border:1px solid var(--line);border-radius:.8rem;padding:1rem;background:#fff;margin-bottom:1rem}
.q-num{display:inline-grid;place-items:center;width:28px;height:28px;background:var(--ink);color:#fff;border-radius:8px;font-weight:600;font-size:.8rem;margin-right:.5rem}
.timer{position:sticky;top:68px;z-index:20;background:var(--ink);color:#fff;border-radius:.7rem;padding:.6rem 1rem;display:flex;justify-content:space-between;align-items:center;font-variant-numeric:tabular-nums}
.timer.warn{background:#b3322a}
.ratio-16x9 iframe,.ratio-16x9 video{border:0;width:100%;height:100%;background:#000}

/* calendar */
.cal .cal-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}
.cal-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:.6rem;overflow:hidden}
.cal-dow{background:#fafbfc;padding:.3rem;text-align:center;font-size:.7rem;text-transform:uppercase;color:var(--muted);font-weight:600}
.cal-cell{background:#fff;min-height:88px;padding:.25rem;font-size:.75rem}
.cal-cell.off{background:#fafbfc;color:#a9b7c4}.cal-cell.today .d{background:var(--primary);color:#fff}
.cal-cell .d{display:inline-grid;place-items:center;min-width:22px;height:22px;border-radius:11px;font-weight:600}
.cal-ev{display:block;margin-top:2px;padding:1px 5px;border-radius:4px;background:#e6f3f4;color:var(--primary-d);text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.7rem}
.cal-ev.warning{background:#fdf1dc;color:#8a5a06}.cal-ev.danger{background:#fce8e6;color:#a12a22}
@media (max-width:575px){.cal-cell{min-height:58px}.cal-ev{font-size:.6rem;padding:0 2px}}

/* public */
.public-nav{background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.public-foot{background:var(--ink);color:#fff;margin-top:4rem}
.hero{background:radial-gradient(1200px 500px at 85% -10%,rgba(14,124,134,.18),transparent),linear-gradient(180deg,#fff,#eef4f6);padding:4.5rem 0 4rem}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.1;font-weight:700}
.hero .lead{color:var(--ink-2);max-width:34rem}
.hero-panel{background:#fff;border:1px solid var(--line);border-radius:1.1rem;box-shadow:0 20px 45px -25px rgba(16,38,59,.35);padding:1.25rem}
.band-chip{display:inline-flex;align-items:center;gap:.4rem;background:#fdf1dc;color:#8a5a06;border-radius:2rem;padding:.25rem .75rem;font-weight:600;font-size:.8rem}
.feature{padding:1.25rem;border:1px solid var(--line);border-radius:.9rem;background:#fff;height:100%}
.feature i{font-size:1.5rem;color:var(--primary)}
.course-card{transition:transform .15s,box-shadow .15s;height:100%}
.course-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px -18px rgba(16,38,59,.4)}
.course-card .top{height:8px;border-radius:.85rem .85rem 0 0;background:linear-gradient(90deg,var(--primary),var(--accent))}
.auth-wrap{min-height:calc(100vh - 140px);display:grid;place-items:center;padding:2rem 1rem}
.auth-card{width:100%;max-width:440px}

/* certificate + print */
.cert{background:#fff;border:10px double var(--primary);padding:3rem 2rem;text-align:center;max-width:900px;margin:0 auto;position:relative}
.cert h1{font-size:2.6rem}.cert .name{font-family:'Fraunces',serif;font-size:2.2rem;border-bottom:2px solid var(--accent);display:inline-block;padding:0 1.5rem;margin:.6rem 0}
@media print{
  body{background:#fff}.topbar,.sidebar,.no-print,.public-nav,.public-foot,.btn,.alert{display:none!important}
  .shell,.content{display:block;padding:0}.card{box-shadow:none;break-inside:avoid}
  .cert{border-width:8px}
}