/* ════════════ LOGIN ════════════ */
.login-stage{
  min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:20px;padding:24px;padding-bottom:max(24px,env(safe-area-inset-bottom));position:relative;overflow:hidden;
}
.login-stage::before{content:'';position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%,rgba(127,224,192,.35),transparent 55%),
    radial-gradient(ellipse 60% 50% at 90% 20%,rgba(59,130,246,.15),transparent 50%),
    linear-gradient(165deg,#0a3d2e,#0f5d46 40%,#1f7a5e 75%,#2f9e7d);
}
.login-particles{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.login-particles i{position:absolute;bottom:-30px;color:rgba(255,255,255,.12);font-size:16px;animation:rise2 linear infinite}
@keyframes rise2{to{transform:translateY(-110vh) rotate(360deg);opacity:0}}
.login-shell{
  position:relative;z-index:1;width:100%;max-width:1000px;display:grid;grid-template-columns:1.05fr 1fr;
  background:rgba(255,255,255,.07);backdrop-filter:blur(24px);
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r-xl);overflow:hidden;
  box-shadow:0 32px 80px rgba(0,0,0,.35);
}
.lf-brand{padding:40px 36px;color:#eafaf3;display:flex;flex-direction:column;min-height:520px}
.lf-logo{
  width:56px;height:56px;border-radius:16px;background:var(--xp-titlebar);
  display:flex;align-items:center;justify-content:center;font-size:28px;color:#fff;
  box-shadow:var(--shadow-glow);margin-bottom:18px;
}
.lf-appname{font-size:22px;font-weight:800;letter-spacing:-.02em}
.lf-tag{font-size:13px;opacity:.75;margin-top:4px}
.lf-big{font-size:clamp(24px,4vw,30px);font-weight:800;line-height:1.25;margin:24px 0 20px;letter-spacing:-.02em}
.lf-big span{background:linear-gradient(90deg,#7fe0c0,#bff4df,#7fe0c0);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200%;animation:shine 4s linear infinite}
@keyframes shine{to{background-position:200%}}
.lf-feats{display:flex;flex-direction:column;gap:10px;margin-bottom:auto}
.lf-feat{display:flex;gap:14px;align-items:center;padding:12px;border-radius:var(--r);transition:.2s}
.lf-feat:hover{background:rgba(255,255,255,.08);transform:translateX(4px)}
.lf-feat-ic{width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.12);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.lf-feat-t{font-size:14px;font-weight:700}.lf-feat-d{font-size:12px;opacity:.7;margin-top:1px}
.lf-stats{display:flex;gap:24px;margin-top:24px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}
.lf-stat-v{font-size:24px;font-weight:800;background:linear-gradient(90deg,#7fe0c0,#bff4df);-webkit-background-clip:text;background-clip:text;color:transparent}
.lf-stat-l{font-size:10px;opacity:.65;text-transform:uppercase;letter-spacing:.06em;margin-top:2px}
.lf-form{background:var(--paper);padding:36px 32px;display:flex;flex-direction:column;justify-content:center}
.lf-mini{display:none;align-items:center;gap:12px;margin-bottom:20px}
.lf-mini .lf-logo{width:44px;height:44px;font-size:22px;margin:0}
.lf-title{font-size:26px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.lf-subtitle{font-size:14px;color:var(--muted);margin:6px 0 24px}
.lf{display:flex;flex-direction:column;gap:14px}
.lf.shake{animation:shake .45s}
@keyframes shake{0%,100%{transform:none}20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
.lf-input-wrap{position:relative}
.lf-input-wrap .lf-ic{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:17px}
.lf-input-wrap .input{padding-left:42px}
.lf-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--muted);cursor:pointer;font-size:17px;padding:8px}
.lf-submit{
  position:relative;display:block;width:100%;height:52px;border:0;border-radius:14px;overflow:hidden;cursor:pointer;
  background:var(--xp-titlebar);box-shadow:var(--shadow-glow);color:#fff;font-family:inherit;font-weight:700;font-size:15px;
  transition:transform .15s,box-shadow .15s;
}
.lf-submit:hover{transform:translateY(-1px);box-shadow:0 14px 32px var(--mint-glow)}
.lf-submit-state{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:8px;opacity:0;visibility:hidden;transition:opacity .2s}
.lf-submit-state-default{opacity:1;visibility:visible}
.lf-submit[data-state="loading"] .lf-submit-state-default,.lf-submit[data-state="success"] .lf-submit-state-default,.lf-submit[data-state="error"] .lf-submit-state-default{opacity:0;visibility:hidden}
.lf-submit[data-state="loading"] .lf-submit-state-loading{opacity:1;visibility:visible}
.lf-submit[data-state="success"] .lf-submit-state-success{opacity:1;visibility:visible}
.lf-submit[data-state="error"] .lf-submit-state-error{opacity:1;visibility:visible}
.lf-submit[data-state]{pointer-events:none}
.lf-submit[data-state="success"]{background:linear-gradient(135deg,#34d399,#10b981)}
.lf-submit[data-state="error"]{background:linear-gradient(135deg,#f87171,#ef4444)}
.lf-submit-status{display:inline-block;min-width:130px;text-align:left}
.lf-dots{display:inline-flex;gap:4px}.lf-dots span{width:7px;height:7px;border-radius:50%;background:#fff;animation:bounce 1s infinite}
.lf-dots span:nth-child(2){animation-delay:.15s}.lf-dots span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,100%{transform:translateY(0);opacity:.5}50%{transform:translateY(-6px);opacity:1}}
.lf-switch{text-align:center;font-size:13px;color:var(--muted);margin-top:16px}
.lf-google-wrap{display:flex;justify-content:center;margin:0 0 12px}
.lf-google-btn-host{display:flex;justify-content:center;width:100%;min-height:44px}
.lf-or{display:flex;align-items:center;gap:12px;margin:0 0 14px;color:var(--muted);font-size:12px}
.lf-or::before,.lf-or::after{content:'';flex:1;height:1px;background:rgba(15,61,46,.12)}
.lf-or span{white-space:nowrap;font-weight:500}
.lf-switch a{font-weight:700;cursor:pointer;color:var(--mint-2)}
.lf-demo{margin-top:20px;padding:14px 12px;border:1.5px dashed rgba(47,158,125,.3);border-radius:var(--r);background:var(--mint-soft)}
.lf-demo-head{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;color:var(--mint-2);margin-bottom:10px}
.lf-demo-head .demo-pill{margin-left:auto;padding:3px 10px;background:linear-gradient(135deg,#fcd34d,#f59e0b);color:#78350f;border-radius:99px;font-size:10px;font-weight:800}
.lf-demo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.lf-demo-card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:12px 8px;background:#fff;border:1px solid var(--line-soft);border-radius:12px;cursor:pointer;transition:.2s}
.lf-demo-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:var(--mint-3)}
.lf-demo-ic{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px}
.lf-mobile-top{display:none}
.donut-chart{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.donut-svg{width:160px;height:160px;flex-shrink:0}
.donut-legend{flex:1;min-width:140px}
.mob-only{display:none!important}
.desk-only{display:block}
.mob-list{flex-direction:column;gap:10px}
.mob-list.mob-only{display:none!important}
@media(max-width:768px){
  .mob-list.mob-only{display:flex!important}
}
.mob-card{
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--r);
  padding:14px 16px;display:flex;flex-direction:column;gap:10px;
}
.mob-card-head{display:flex;align-items:center;gap:10px}
.mob-card-row{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:13px;flex-wrap:wrap}
.mob-card-actions{display:flex;gap:8px;justify-content:flex-end;padding-top:8px;border-top:1px solid var(--line-soft)}
.mob-card-link{cursor:pointer;transition:.15s}
.mob-card-link:hover,.mob-card-link:focus-visible{border-color:var(--mint-3);box-shadow:var(--shadow-xs);outline:none}
.panel-body > .mob-list.mob-only{margin-top:0}
.panel > .mob-list.mob-only{padding:16px}
.lesson-meta{font-size:12px;color:var(--muted);margin-top:2px}
.approval-item .ap-actions{display:flex;gap:8px;flex-shrink:0;align-items:center}
.cat-list{display:flex;flex-direction:column;gap:12px}
.cat-row.panel{margin:0}
.cat-row .panel-body{
  display:grid;grid-template-columns:auto 1fr auto;gap:16px 20px;align-items:center;
  padding:16px 20px;
}
.cat-icon{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:22px;flex-shrink:0;
}
.cat-info{min-width:0}
.cat-name{font-weight:700;font-size:15px;line-height:1.35}
.cat-meta{font-size:12px;color:var(--muted);margin-top:3px}
.cat-actions{display:flex;gap:8px;flex-shrink:0}
.lf-demo-card[data-role="admin"] .lf-demo-ic{background:linear-gradient(135deg,#fde68a,#f59e0b);color:#78350f}
.lf-demo-card[data-role="teacher"] .lf-demo-ic{background:linear-gradient(135deg,#a7f3d0,#34d399);color:#065f46}
.lf-demo-card[data-role="student"] .lf-demo-ic{background:linear-gradient(135deg,#bfdbfe,#60a5fa);color:#1e3a8a}
.lf-demo-role{font-size:11px;font-weight:700}.lf-demo-user{font-size:9px;color:var(--muted);font-family:monospace}
.lf-demo-note{text-align:center;font-size:11px;color:var(--muted);margin-top:10px}

/* ════════════ SHELL ════════════ */
#app-root.shell{display:grid;grid-template-columns:272px 1fr;min-height:100vh;min-height:100dvh}
.sidebar{
  position:sticky;top:0;height:100vh;height:100dvh;overflow-y:auto;overflow-x:hidden;
  background:linear-gradient(180deg,#0c3528 0%,#0f5d46 50%,#103f30 100%);
  color:#d6f0e6;display:flex;flex-direction:column;z-index:50;
  border-right:1px solid rgba(255,255,255,.06);
}
.sb-head{padding:20px 16px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.sb-logo{display:flex;align-items:center;gap:12px}
.sb-logo-ic{
  width:46px;height:46px;border-radius:14px;background:var(--xp-titlebar);
  display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;
  box-shadow:0 4px 20px rgba(127,224,192,.35);flex-shrink:0;
}
.sb-app{font-size:16px;font-weight:800;color:#fff;letter-spacing:-.02em}
.sb-org{font-size:11px;opacity:.65;margin-top:2px}
.sb-clock{
  margin-top:16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r);padding:12px 14px;text-align:center;
}
.sb-clock-time{font-size:24px;font-weight:800;color:#bff4df;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.sb-clock-date{font-size:11px;opacity:.7;margin-top:4px}
.sb-user{
  margin-top:14px;display:flex;align-items:center;gap:11px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r);padding:10px 12px;
}
.sb-avatar{
  width:40px;height:40px;border-radius:12px;background:var(--xp-titlebar);
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px;object-fit:cover;flex-shrink:0;
}
.sb-uname{font-size:13px;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sb-nav{flex:1;padding:12px 10px 20px;overflow-y:auto;-webkit-overflow-scrolling:touch}
.sb-section{
  font-size:10px;text-transform:uppercase;letter-spacing:.1em;opacity:.45;
  padding:16px 12px 8px;font-weight:700;
}
.sb-link{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:12px;
  color:rgba(234,250,243,.85);font-size:14px;font-weight:500;cursor:pointer;
  position:relative;transition:.18s;margin-bottom:3px;
}
.sb-link:hover{background:rgba(255,255,255,.08);color:#fff}
.sb-link i{font-size:18px;width:22px;text-align:center;opacity:.9}
.sb-link.active{
  background:rgba(127,224,192,.15);color:#fff;font-weight:700;
  box-shadow:inset 0 0 0 1px rgba(127,224,192,.2);
}
.sb-link.active::before{
  content:'';position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:0 4px 4px 0;
  background:linear-gradient(180deg,#7fe0c0,#43b88f);box-shadow:0 0 12px rgba(127,224,192,.5);
}
.sb-link .sb-badge{margin-left:auto;background:var(--rose);color:#fff;font-size:10px;font-weight:800;padding:2px 8px;border-radius:99px;min-width:20px;text-align:center}
.sb-link.logout{color:#ffb4ac;margin-top:4px}
.sb-link.logout:hover{background:rgba(239,68,68,.12)}

.main-area{display:flex;flex-direction:column;min-width:0;min-height:100vh;min-height:100dvh;position:relative}
.navbar{
  position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:12px;
  padding:12px 20px;padding-top:max(12px,env(safe-area-inset-top));
  background:var(--glass);backdrop-filter:blur(20px) saturate(1.2);
  border-bottom:1px solid rgba(212,233,223,.6);
}
.nav-burger{
  display:none;width:var(--touch);height:var(--touch);border:1px solid var(--line-soft);
  border-radius:12px;background:var(--paper);cursor:pointer;font-size:20px;color:var(--mint-2);
  align-items:center;justify-content:center;flex-shrink:0;
}
.nav-page-ic{
  width:42px;height:42px;border-radius:13px;background:var(--xp-titlebar);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:19px;
  box-shadow:var(--shadow-xs);flex-shrink:0;
}
.nav-title{font-size:17px;font-weight:800;color:var(--ink);line-height:1.15;letter-spacing:-.02em}
.nav-sub{font-size:12px;color:var(--muted);margin-top:2px}
.nav-sp{flex:1}
.nav-pill{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:99px;
  background:var(--mint-soft);color:var(--mint-2);font-size:12px;font-weight:600;
  border:1px solid rgba(47,158,125,.12);
}
.nav-pill .pulse{width:7px;height:7px;border-radius:50%;background:#10b981;animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(16,185,129,0)}}
.nav-profile{
  display:flex;align-items:center;gap:8px;padding:5px 10px 5px 5px;
  border-radius:12px;border:1px solid var(--line-soft);background:var(--paper);cursor:pointer;
  transition:box-shadow .15s,border-color .15s;
}
.nav-profile:hover{border-color:var(--mint-3);box-shadow:var(--shadow-xs)}
.nav-profile .sb-avatar{width:34px;height:34px;font-size:13px;border-radius:10px}
.nav-pop{
  position:absolute;top:68px;right:20px;z-index:60;width:min(280px,calc(100vw - 32px));
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;animation:popIn .2s var(--ease);
}
@keyframes popIn{from{opacity:0;transform:translateY(-6px) scale(.97)}to{opacity:1;transform:none}}
.nav-pop-head{padding:16px;background:linear-gradient(135deg,var(--mint-soft),#fff);display:flex;gap:12px;align-items:center;border-bottom:1px solid var(--line-soft)}
.nav-pop-item{display:flex;align-items:center;gap:11px;padding:13px 16px;cursor:pointer;font-size:14px;color:var(--ink-2);transition:background .12s;min-height:var(--touch)}
.nav-pop-item i{font-size:17px;color:var(--muted);width:20px}
.nav-pop-item:hover{background:var(--mint-soft)}
.nav-pop-item.danger{color:var(--rose)}.nav-pop-item.danger i{color:var(--rose)}
.page-wrap{
  flex:1;padding:20px 24px;max-width:1320px;width:100%;margin:0 auto;
  padding-bottom:max(20px,env(safe-area-inset-bottom));
}
.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(10,40,32,.55);backdrop-filter:blur(3px);z-index:45;opacity:0;transition:opacity .25s}
.sidebar-backdrop.show{display:block;opacity:1}

/* ════════════ FOOTER ════════════ */
.app-footer{
  margin:0 24px 20px;padding:16px 20px;background:var(--paper);
  border:1px solid var(--line-soft);border-radius:var(--r-lg);box-shadow:var(--shadow-xs);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:12px;color:var(--muted);
}
.af-year{background:var(--xp-titlebar);color:#fff;padding:4px 11px;border-radius:99px;font-weight:800;font-variant-numeric:tabular-nums;font-size:11px}
.af-ver{padding:3px 9px;background:var(--mint-soft);color:var(--mint-2);border-radius:99px;font-size:11px;font-weight:700;margin-left:6px}
.af-dev{display:flex;align-items:center;gap:12px}
.af-dev-logo{width:42px;height:42px;border-radius:50%;border:2px solid var(--line-soft);object-fit:cover;transition:transform .2s}
.af-dev-link:hover .af-dev-logo{transform:scale(1.06)}
.af-dev-name{font-weight:700;color:var(--ink)}.af-dev-url{color:var(--mint-2);font-weight:600;font-size:11px}
.landing .lnd-body > .app-footer{margin:28px 0 0}
.login-stage > .app-footer{
  width:100%;max-width:1000px;margin:16px auto 0;position:relative;z-index:1;
}

/* ════════════ LANDING ════════════ */
.landing{min-height:100vh;min-height:100dvh}
.lnd-nav{
  position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:14px;
  padding:14px 24px;padding-top:max(14px,env(safe-area-inset-top));
  background:var(--glass-strong);backdrop-filter:blur(20px);border-bottom:1px solid var(--line-soft);
}
.lnd-nav .sb-logo-ic{width:42px;height:42px;font-size:20px}
.lnd-hero{
  position:relative;overflow:hidden;color:#fff;padding:clamp(48px,8vw,72px) 24px clamp(56px,10vw,80px);text-align:center;
  background:linear-gradient(155deg,#0a3d2e,#0f5d46 45%,#1f7a5e 80%,#2f9e7d);
}
.lnd-hero::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 60% at 50% 0%,rgba(127,224,192,.25),transparent 60%);
  animation:floaty 14s ease-in-out infinite;
}
@keyframes floaty{0%,100%{transform:translate(0,0)}50%{transform:translate(-12px,14px)}}
.lnd-hero>*{position:relative;z-index:1}
.lnd-hero h1{font-size:clamp(28px,6vw,42px);font-weight:800;margin:0 0 14px;max-width:720px;margin-inline:auto;line-height:1.2;letter-spacing:-.03em}
.lnd-hero h1 span{background:linear-gradient(90deg,#bff4df,#7fe0c0,#bff4df);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200%;animation:shine 4s linear infinite}
.lnd-hero p{font-size:clamp(15px,2.5vw,17px);opacity:.9;max-width:560px;margin:0 auto 24px;line-height:1.6}
.lnd-hero-stats,.pub-stats{display:flex;gap:clamp(12px,4vw,32px);justify-content:center;flex-wrap:wrap;margin-top:32px}
.lnd-hs-v{font-size:clamp(26px,5vw,34px);font-weight:800;background:linear-gradient(90deg,#bff4df,#7fe0c0);-webkit-background-clip:text;background-clip:text;color:transparent}
.lnd-hs-l{font-size:12px;opacity:.75;margin-top:4px}
.pub-stats{margin-top:0}
.pub-stat-v{font-size:clamp(20px,4vw,28px);font-weight:800;color:var(--mint-2);line-height:1}
.pub-stat-l{font-size:11px;color:var(--muted);margin-top:4px;font-weight:500}
.lf-stats.pub-stats-dark{margin-top:auto;padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}
.lf-stats.pub-stats-dark .pub-stat-v{font-size:22px;background:linear-gradient(90deg,#7fe0c0,#bff4df);-webkit-background-clip:text;background-clip:text;color:transparent}
.lf-stats.pub-stats-dark .pub-stat-l{opacity:.7;color:#eafaf3;font-size:10px}
.lf-tag-mobile{display:none;font-size:12px;color:var(--muted);margin-top:2px}
.lnd-body{max-width:1240px;margin:0 auto;padding:32px 24px 40px;scroll-margin-top:72px}

/* ── Public footer (landing / login) ── */
.pub-footer{
  display:flex;align-items:center;gap:14px;padding:16px 20px;border-radius:var(--r-lg);
  margin-top:28px;font-size:12px;line-height:1.55;
}
.pub-footer--light{
  background:var(--paper);border:1px solid var(--line-soft);box-shadow:var(--shadow-xs);color:var(--muted);
}
.pub-footer--light .pub-footer-copy{color:var(--ink-2);font-weight:600}
.pub-footer--light .pub-footer-dev-link{color:var(--mint-2);font-weight:600}
.pub-footer--dark{
  position:relative;z-index:1;width:100%;max-width:1000px;margin:12px auto 0;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  color:#cdeadf;backdrop-filter:blur(10px);
}
.pub-footer--dark .pub-footer-copy{color:#eafaf3;font-weight:600}
.pub-footer--dark .pub-footer-dev-link{color:#bff4df;font-weight:600}
.pub-footer-logo{flex-shrink:0;line-height:0}
.pub-footer-logo img{width:40px;height:40px;border-radius:50%;border:2px solid rgba(255,255,255,.25);object-fit:cover}
.pub-footer--light .pub-footer-logo img{border-color:var(--line-soft)}
.pub-footer-body{flex:1;min-width:0}
.pub-footer-dev-link{display:block;font-size:11px;text-decoration:none}
.pub-footer-dev-link:hover{text-decoration:underline}
.pub-footer--auth .pub-footer-inner{display:flex;align-items:center;gap:14px;width:100%}
.pub-footer--auth .pub-footer-dev{margin-top:4px}
.learn-media-actions{display:flex;justify-content:flex-end;margin-bottom:10px}
.quiz-take-wrap{display:flex;flex-direction:column;gap:0}
.quiz-take-foot{
  position:sticky;bottom:0;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);
  padding:14px;border-radius:16px;box-shadow:var(--shadow);margin-top:8px;
  display:flex;gap:12px;align-items:center;flex-wrap:wrap;
}
/* ── Class manage actions ── */
.class-act-bar{margin-bottom:18px}
.class-act-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.class-act-card{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;
  padding:16px 10px 14px;border:1px solid var(--line-soft);border-radius:var(--r-lg);
  background:var(--paper);cursor:pointer;font-family:inherit;color:inherit;
  text-decoration:none;transition:border-color .18s,box-shadow .18s,transform .15s;
  -webkit-tap-highlight-color:transparent;
}
.class-act-card:hover{border-color:var(--mint-3);box-shadow:var(--shadow-sm);transform:translateY(-2px)}
.class-act-ic{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:22px;box-shadow:var(--shadow-xs);
}
.class-act-t{font-size:14px;font-weight:700;color:var(--ink);line-height:1.25}
.class-act-d{font-size:11px;color:var(--muted);line-height:1.3}
.class-act-add{width:100%;margin-top:12px;justify-content:center;min-height:44px}
@media(max-width:768px){
  .class-act-grid{grid-template-columns:1fr;gap:8px}
  .class-act-card{flex-direction:row;text-align:left;padding:14px 16px;gap:14px}
  .class-act-ic{width:44px;height:44px;font-size:20px;flex-shrink:0}
  .class-act-t{font-size:15px}
  .class-act-d{font-size:12px}
}

/* ── Mobile bottom dock ── */
.mob-dock{display:none}
.mob-dock-bar{display:flex;align-items:flex-end;justify-content:space-between;gap:6px}
.mob-dock-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:6px;
  padding:0 6px 4px;border:0;background:none;cursor:pointer;font-family:inherit;
  color:var(--muted);font-size:10px;font-weight:600;text-decoration:none;
  max-width:88px;min-width:0;-webkit-tap-highlight-color:transparent;
  transition:color .2s var(--ease),transform .15s var(--ease-spring);
}
.mob-dock-ic{
  display:flex;align-items:center;justify-content:center;width:46px;height:38px;
  border-radius:13px;transition:background .2s,transform .2s var(--ease-spring),box-shadow .2s;
}
.mob-dock-ic i{font-size:20px;line-height:1}
.mob-dock-lbl{
  line-height:1.2;text-align:center;white-space:nowrap;overflow:hidden;
  text-overflow:ellipsis;max-width:100%;letter-spacing:0;padding:0 2px;
}
.mob-dock-item:active{transform:scale(.94)}
.mob-dock-item.active{color:var(--mint-2)}
.mob-dock-item.active .mob-dock-ic{background:var(--mint-soft);box-shadow:inset 0 0 0 1px rgba(47,158,125,.12)}
.mob-dock-item.active .mob-dock-ic i{transform:scale(1.06)}
.mob-dock-fab{
  flex:1;max-width:92px;margin-top:-14px;padding:0 8px 4px;
}
.mob-dock-fab .mob-dock-ic{
  width:52px;height:52px;border-radius:17px;
  background:var(--xp-titlebar);color:#fff;
  box-shadow:0 8px 22px var(--mint-glow),0 2px 8px rgba(15,93,70,.12);
}
.mob-dock-fab .mob-dock-ic i{font-size:24px}
.mob-dock-fab .mob-dock-lbl{color:var(--ink-2);font-weight:700;font-size:10px;margin-top:0}
.mob-dock-fab.active .mob-dock-ic{
  background:linear-gradient(145deg,#1a6b52,#2f9e7d 55%,#43b88f);
  box-shadow:0 12px 32px var(--mint-glow),0 0 0 3px rgba(47,158,125,.18);
}
.mob-dock-fab:active{transform:scale(.96)}
.mob-dock-fab:active .mob-dock-ic{transform:scale(.96)}
.lnd-filter{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px;justify-content:center}
.lnd-chip{
  padding:9px 18px;border-radius:99px;border:1.5px solid var(--line);background:var(--paper);
  font-size:13px;font-weight:600;cursor:pointer;color:var(--ink-2);transition:.18s;
  display:inline-flex;gap:7px;align-items:center;min-height:40px;
}
.lnd-chip:hover{border-color:var(--mint-3);background:var(--mint-soft)}
.lnd-chip.active{background:var(--xp-titlebar);color:#fff;border-color:transparent;box-shadow:var(--shadow-glow)}
.lnd-cat-title{display:flex;align-items:center;gap:12px;font-size:clamp(17px,3vw,20px);font-weight:800;color:var(--ink);margin:32px 0 16px;letter-spacing:-.02em}
.lnd-cat-title .cat-ic{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;box-shadow:var(--shadow-xs)}
.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:18px}

/* ── Classroom card ── */
.cl-card{
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--r-xl);
  overflow:hidden;box-shadow:var(--shadow-xs);transition:.25s var(--ease);
  cursor:pointer;display:flex;flex-direction:column;
}
.cl-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(47,158,125,.25)}
.cl-card:active{transform:translateY(-2px)}
.cl-cover{
  height:140px;position:relative;background:var(--xp-titlebar);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.cl-cover::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(15,93,70,.35));pointer-events:none}
.cl-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.cl-card:hover .cl-cover img{transform:scale(1.04)}
.cl-cover .cl-cover-ic{font-size:48px;color:rgba(255,255,255,.5)}
.cl-cover .cl-cat-badge{
  position:absolute;top:12px;left:12px;padding:5px 12px;border-radius:99px;
  font-size:11px;font-weight:700;color:#fff;backdrop-filter:blur(8px);
  background:rgba(15,93,70,.6);border:1px solid rgba(255,255,255,.15);z-index:1;
}
.cl-cover .cl-reg-badge{
  position:absolute;top:12px;right:12px;padding:5px 11px;border-radius:99px;
  font-size:11px;font-weight:700;background:rgba(255,255,255,.95);color:#166534;
  box-shadow:var(--shadow-xs);z-index:1;
}
.cl-cover .cl-reg-badge.off{color:#991b1b}
.cl-body{padding:16px 18px 18px;flex:1;display:flex;flex-direction:column}
.cl-grade{font-size:11px;font-weight:700;color:var(--mint-2);text-transform:uppercase;letter-spacing:.04em}
.cl-title{font-size:17px;font-weight:800;color:var(--ink);margin:4px 0 6px;line-height:1.35;letter-spacing:-.02em}
.cl-desc{font-size:13px;color:var(--muted);line-height:1.55;margin-bottom:14px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1}
.cl-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);padding-top:12px;border-top:1px solid var(--line-soft);flex-wrap:wrap}
.cl-meta .cl-teacher{display:flex;align-items:center;gap:7px;flex:1;min-width:0}
.cl-meta .sb-avatar{width:26px;height:26px;font-size:11px;border-radius:8px}
.cl-meta .cl-teacher span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:500}
.cl-meta .cl-students{display:inline-flex;gap:4px;align-items:center;color:var(--mint-2);font-weight:700;padding:4px 10px;background:var(--mint-soft);border-radius:99px;font-size:11px}
.cl-meta .cl-rating{display:inline-flex;gap:4px;align-items:center;color:var(--gold);font-weight:700;font-size:11px;padding:4px 10px;background:#fff8e6;border-radius:99px}
.cl-meta .cl-rating .bi-star-fill{font-size:10px}

/* ════════════ APP MENU GRID (mobile) ════════════ */
.app-menu-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.app-tile{display:flex;flex-direction:column;align-items:center;gap:8px;padding:6px;text-decoration:none;cursor:pointer;-webkit-tap-highlight-color:transparent}
.app-tile .ic{
  width:56px;height:56px;border-radius:18px;color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:24px;
  box-shadow:0 6px 18px rgba(31,122,94,.22);transition:transform .18s var(--ease-spring);
}
.app-tile:active .ic{transform:scale(.9)}
.app-tile .lb{font-size:11px;font-weight:600;color:var(--ink-2);text-align:center;line-height:1.3}
.app-tile .ic[data-g="mint"]{background:linear-gradient(135deg,#43b88f,#1f7a5e)}
.app-tile .ic[data-g="sky"]{background:linear-gradient(135deg,#38bdf8,#0284c7)}
.app-tile .ic[data-g="violet"]{background:linear-gradient(135deg,#a78bfa,#7c3aed)}
.app-tile .ic[data-g="amber"]{background:linear-gradient(135deg,#fcd34d,#d97706)}
.app-tile .ic[data-g="rose"]{background:linear-gradient(135deg,#fb7185,#e11d48)}
.app-tile .ic[data-g="pink"]{background:linear-gradient(135deg,#f472b6,#db2777)}
.app-tile .ic[data-g="slate"]{background:linear-gradient(135deg,#94a3b8,#475569)}
.app-tile .ic[data-g="cyan"]{background:linear-gradient(135deg,#22d3ee,#0891b2)}

/* ════════════ DASH MOBILE ════════════ */
.dash-mobile{display:none}

/* ════════════ Misc shared ════════════ */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:18px}
.toolbar .search{flex:1;min-width:min(100%,200px);position:relative}
.toolbar .search i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:16px;pointer-events:none}
.toolbar .search input{padding-left:42px;border-radius:12px}
.chips{display:flex;gap:8px;flex-wrap:wrap;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:4px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{
  padding:8px 16px;border-radius:99px;border:1.5px solid var(--line);background:var(--paper);
  font-size:13px;cursor:pointer;color:var(--ink-2);font-weight:600;transition:.18s;
  white-space:nowrap;min-height:38px;display:inline-flex;align-items:center;gap:6px;
}
.chip:hover{border-color:var(--mint-3);background:var(--mint-soft)}
.chip.active{background:var(--xp-titlebar);color:#fff;border-color:transparent;box-shadow:var(--shadow-xs)}
.section-title{font-size:17px;font-weight:800;color:var(--ink);margin:0 0 14px;display:flex;align-items:center;gap:10px;letter-spacing:-.02em}
.section-title i{color:var(--mint-2)}
.medal{width:28px;height:28px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;color:#fff;flex-shrink:0}
.medal-1{background:linear-gradient(135deg,#fcd34d,#f59e0b)}.medal-2{background:linear-gradient(135deg,#e5e7eb,#9ca3af)}.medal-3{background:linear-gradient(135deg,#fbbf24,#b45309)}.medal-n{background:#cbd5e1;color:#475569}
.lesson-item{
  display:flex;align-items:center;gap:14px;padding:14px 16px;
  border:1px solid var(--line-soft);border-radius:var(--r);margin-bottom:10px;
  background:var(--paper);transition:.18s var(--ease);
}
.lesson-item-ic{flex-shrink:0;display:flex;align-items:center;justify-content:center}
.lesson-item-ic .learn-nav-ic-box{width:36px;height:36px;font-size:15px;border-radius:11px}
.lesson-item-ic-sec .learn-nav-ic-box{width:36px;height:36px;font-size:16px}
.lesson-item:hover{border-color:var(--mint-3);box-shadow:var(--shadow-xs);transform:translateX(2px)}
.lesson-num{
  width:36px;height:36px;border-radius:11px;background:var(--mint-soft);color:var(--mint-2);
  display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0;font-size:14px;
}
.lesson-num.done{background:linear-gradient(135deg,#34d399,#10b981);color:#fff;box-shadow:0 3px 10px rgba(16,185,129,.3)}
.lesson-info{flex:1;min-width:0}.lesson-t{font-weight:700;color:var(--ink);font-size:14px;line-height:1.4}
.quiz-q{
  background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:18px;margin-bottom:16px;box-shadow:var(--shadow-xs);
}
.quiz-q-num{font-size:12px;font-weight:700;color:var(--mint-2);margin-bottom:8px;text-transform:uppercase;letter-spacing:.04em}
.quiz-q-text{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:14px;line-height:1.5}
.quiz-choice{
  display:flex;align-items:center;gap:12px;padding:14px 16px;
  border:1.5px solid var(--line-soft);border-radius:var(--r);margin-bottom:10px;
  cursor:pointer;transition:.15s;min-height:var(--touch);
}
.quiz-choice:hover{border-color:var(--mint-3);background:#f7fcf9}
.quiz-choice.selected{border-color:var(--mint-1);background:var(--mint-soft);box-shadow:0 0 0 3px rgba(47,158,125,.1)}
.quiz-choice .qc-letter{
  width:32px;height:32px;border-radius:10px;border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0;font-size:14px;
}
.quiz-choice.selected .qc-letter{background:var(--mint-1);color:#fff;border-color:transparent}

/* ════════════ LESSON PLAYER ════════════ */
.learn-player{display:grid;grid-template-columns:1fr min(320px,32vw);gap:20px;align-items:start}
.learn-main{min-width:0}
.learn-main-body{padding:24px!important}
.learn-toolbar{margin-bottom:14px}
.learn-lesson-head{margin-bottom:20px}
.learn-type-pill{margin-bottom:10px}
.learn-lesson-title{font-size:clamp(20px,4vw,26px);font-weight:800;color:var(--ink);margin:0;line-height:1.35;letter-spacing:-.02em}
.learn-desc{font-size:15px;color:var(--ink-2);line-height:1.65;margin:0 0 18px}
.learn-video{width:100%;max-height:min(72vh,520px);border-radius:var(--r-lg);margin-bottom:14px;background:#000;box-shadow:var(--shadow-sm)}
.learn-pdf{width:100%;border:0;border-radius:var(--r-lg);margin-bottom:14px;background:var(--cream);box-shadow:var(--shadow-xs)}
.learn-embed{position:relative;padding-bottom:56.25%;height:0;margin-bottom:14px;border-radius:var(--r-lg);overflow:hidden;background:#000;box-shadow:var(--shadow-sm)}
.learn-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.learn-empty{color:var(--muted);padding:32px;text-align:center}
.learn-lesson-foot{
  display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;
  margin-top:24px;padding-top:20px;border-top:1px solid var(--line-soft);
}
.learn-foot-mid{display:flex;justify-content:center}
.learn-sidebar{position:sticky;top:80px;max-height:calc(100vh - 100px);display:flex;flex-direction:column}
.learn-nav-panel{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}
.learn-nav-prog{padding:12px 16px 0;border-bottom:1px solid var(--line-soft)}
.learn-nav-list{padding:10px!important;overflow-y:auto;flex:1;max-height:calc(100vh - 220px);-webkit-overflow-scrolling:touch}
.learn-nav-section{margin-bottom:14px}
.learn-nav-section:last-child{margin-bottom:0}
.learn-nav-sec-head{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:800;color:var(--ink);padding:8px 10px 6px}
.learn-nav-sec-head .bi{color:var(--mint-2);font-size:14px;flex-shrink:0}
.learn-nav-topic{margin-bottom:6px}
.learn-nav-topic:last-child{margin-bottom:0}
.learn-nav-topic-head{display:flex;align-items:flex-start;gap:7px;font-size:12px;font-weight:700;color:var(--ink-2);padding:6px 10px 5px 18px;line-height:1.45}
.learn-nav-topic-head .bi{color:var(--muted);font-size:12px;margin-top:2px;flex-shrink:0}
.learn-nav-topic-head span{min-width:0}
.learn-nav-depth-1{padding-left:14px}
.learn-nav-depth-2{padding-left:26px}
.learn-nav-item{display:flex;align-items:flex-start;gap:9px;text-decoration:none;color:inherit;transition:.15s;border:1px solid transparent;border-radius:11px}
.learn-nav-leaf{padding:8px 10px;margin-bottom:3px;font-size:12px;min-height:38px}
.learn-nav-leaf:hover{background:var(--mint-soft);border-color:rgba(47,158,125,.15)}
.learn-nav-leaf.is-active{background:var(--mint-soft);border-color:var(--mint-1);box-shadow:0 0 0 2px rgba(47,158,125,.08)}
.learn-nav-leaf.is-disabled{opacity:.45;pointer-events:none;cursor:default}
.learn-nav-ic-box{width:28px;height:28px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0;transition:.15s var(--ease-spring)}
.learn-nav-ic-done{background:linear-gradient(135deg,#34d399,#10b981);color:#fff;box-shadow:0 2px 8px rgba(16,185,129,.35)}
.learn-nav-ic-pending{box-shadow:var(--shadow-xs)}
.learn-nav-ic-quiz-pre{background:linear-gradient(135deg,#fde68a,#fbbf24);color:#92400e}
.learn-nav-ic-quiz-post{background:linear-gradient(135deg,#93c5fd,#3b82f6);color:#1e3a8a}
.learn-nav-ic-quiz-unit{background:linear-gradient(135deg,#c4b5fd,#8b5cf6);color:#4c1d95}
.learn-nav-ic-lesson-media{background:linear-gradient(135deg,#7fe0c0,#2f9e7d);color:#0f5d46}
.learn-nav-ic-lesson-doc{background:linear-gradient(135deg,#e2e8f0,#94a3b8);color:#334155}
.learn-nav-ic-lesson-other{background:linear-gradient(135deg,#fbcfe8,#f472b6);color:#831843}
.learn-nav-leaf.is-pending:hover .learn-nav-ic-box{transform:scale(1.08)}
.learn-nav-leaf.is-active .learn-nav-ic-box{box-shadow:0 0 0 2px rgba(47,158,125,.25)}
.learn-nav-leaf .learn-nav-title{font-weight:600;color:var(--ink);line-height:1.45;min-width:0}
.learn-nav-leaf.is-pending .learn-nav-title{color:var(--ink-2)}
.learn-nav-empty{font-size:12px;color:var(--muted);padding:8px 18px;margin:0}

/* ════════════ Cards & extras ════════════ */
.continue-card{
  background:var(--xp-titlebar);color:#fff;border-radius:var(--r-xl);padding:20px;
  display:flex;align-items:center;gap:18px;margin-bottom:20px;box-shadow:var(--shadow);
  transition:transform .2s,box-shadow .2s;cursor:pointer;
}
.continue-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.continue-card .cc-ic{
  width:56px;height:56px;border-radius:16px;background:rgba(255,255,255,.15);
  backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0;
}
.continue-card .cc-body{flex:1;min-width:0}
.mission{display:flex;align-items:center;gap:14px;padding:13px 16px;border-radius:var(--r);border:1px solid var(--line-soft);background:var(--paper);margin-bottom:10px;transition:.15s}
.mission.done{background:#f0faf5;opacity:.8}
.mission-check{width:28px;height:28px;border-radius:9px;border:2px solid var(--line);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.mission.done .mission-check{background:linear-gradient(135deg,#34d399,#10b981);border-color:transparent;color:#fff}
.svg-chart{width:100%;height:auto}
.vis-icon-btn{transition:.15s!important}
.vis-icon-btn:hover{transform:scale(1.04)}

/* ════════════ RESPONSIVE ════════════ */
@media(max-width:960px){
  .learn-player{grid-template-columns:1fr}
  .learn-sidebar{position:static;max-height:none}
  .learn-nav-list{max-height:300px}
  .learn-lesson-foot{grid-template-columns:1fr 1fr;grid-template-rows:auto auto}
  .learn-foot-mid{grid-column:1/-1;order:-1}
}
@media(max-width:768px){
  .landing{padding-bottom:calc(108px + env(safe-area-inset-bottom))}
  .lnd-nav-actions{display:none!important}
  .mob-dock{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:55;
    padding-bottom:env(safe-area-inset-bottom);pointer-events:none;
  }
  .mob-dock-bar{
    pointer-events:auto;position:relative;
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(28px) saturate(1.5);
    border-top:1px solid rgba(212,233,223,.9);
    box-shadow:0 -12px 40px rgba(15,93,70,.07);
    padding:16px 18px 14px;min-height:72px;
  }
  .mob-dock-bar::before{
    content:'';position:absolute;left:50%;top:8px;transform:translateX(-50%);
    width:40px;height:4px;border-radius:99px;background:rgba(47,158,125,.18);
  }
  .lnd-body{padding-bottom:16px}
  .pub-footer{margin-top:20px;margin-bottom:8px}
  .pub-footer--auth{width:100%;max-width:420px;margin-left:auto;margin-right:auto}
  .pub-footer--auth .pub-footer-inner{
    flex-direction:column;align-items:center;text-align:center;gap:8px;
    padding:14px 10px 6px;border-top:1px solid rgba(47,158,125,.12);
  }
  .login-stage .pub-footer--auth{
    background:transparent;border:none;box-shadow:none;backdrop-filter:none;
    margin-top:10px;padding:0;
  }
  .login-stage .pub-footer--dark .pub-footer-copy{color:var(--ink-2);font-weight:600;font-size:11px;line-height:1.5}
  .login-stage .pub-footer--dark .pub-footer-dev-link{color:var(--mint-2);font-size:11px}
  .login-stage .pub-footer-logo img{border-color:var(--line-soft)}
  .pub-footer-logo{margin-bottom:0}
  .login-stage{
    padding:max(20px,env(safe-area-inset-top)) 18px max(20px,env(safe-area-inset-bottom));
    justify-content:center;align-items:center;min-height:100dvh;
    background:linear-gradient(160deg,#e6f4ed 0%,var(--cream) 45%,#dceee4 100%);
  }
  .login-stage::before,.login-particles,.lf-brand,.lf-mobile-top{display:none}
  .login-shell{
    width:100%;max-width:420px;border-radius:24px;
    background:var(--paper);border:1px solid rgba(212,233,223,.85);
    box-shadow:0 16px 48px rgba(15,93,70,.1);backdrop-filter:none;
    display:flex;flex-direction:column;grid-template-columns:1fr;overflow:hidden;
  }
  .login-shell::before{
    content:'';display:block;height:5px;
    background:linear-gradient(90deg,#1f7a5e,#43b88f,#7fe0c0);
  }
  .lf-form{
    flex:1;display:flex;flex-direction:column;
    border-radius:0;padding:28px 22px 22px;box-shadow:none;margin:0;
  }
  .lf-mini{
    display:flex!important;flex-direction:column;align-items:center;text-align:center;
    gap:8px;margin-bottom:18px;
  }
  .lf-mini .lf-logo{width:52px;height:52px;font-size:26px;margin:0}
  .lf-mini .lf-appname{color:var(--ink)!important;font-size:17px!important}
  .lf-title{font-size:21px;margin-top:0;text-align:center}
  .lf-subtitle{margin-bottom:18px;text-align:center}
  .lf-switch{margin-top:12px;padding:8px 0 0}
  .lf-switch a{display:inline-flex;align-items:center;padding:6px 4px;min-height:36px;font-weight:700}
  .lf-demo{margin-top:16px}
  .lf-row{grid-template-columns:1fr!important}
  #app-root.shell{grid-template-columns:1fr}
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;width:min(288px,88vw);
    transform:translateX(-105%);transition:transform .28s var(--ease);
    box-shadow:var(--shadow-lg);z-index:50;
  }
  .sidebar.open{transform:translateX(0)}
  .nav-burger{display:none!important}
  .nav-sub{display:none}
  .nav-pill{display:none}
  .nav-class-tools:not(:empty){display:flex!important;flex-shrink:0}
  .nav-edit-toggle{padding:6px 11px;font-size:12px;min-height:36px}
  .nav-title{font-size:16px}
  .page-wrap{padding:16px;padding-bottom:calc(108px + env(safe-area-inset-bottom))}
  .navbar{padding:10px 16px;padding-top:max(10px,env(safe-area-inset-top))}
  .lf-brand{display:none}
  .desk-only{display:none!important}
  .mob-only:not(.mob-list){display:block!important}
  .dash-donut-wrap{display:flex;justify-content:center}
  .donut-chart{flex-direction:column;align-items:center;justify-content:center;text-align:center}
  .donut-legend{min-width:0;width:100%;max-width:220px}
  .approval-item{flex-wrap:wrap;align-items:flex-start}
  .approval-item .lesson-info{flex:1 1 calc(100% - 52px);min-width:0}
  .approval-item .ap-actions{flex:1 1 100%;justify-content:flex-end;padding-top:4px}
  .class-hero .kpi-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .class-hero .hero-title{font-size:20px;line-height:1.3}
  .class-toolbar{flex-wrap:wrap}
  .class-toolbar .btn{flex:1 1 auto;min-width:calc(50% - 4px)}
  .panel-head{flex-wrap:wrap;gap:8px}
  .panel-head .btn{margin-left:auto}
  .lnd-hero{padding:48px 20px 56px}
  .lnd-body{padding:24px 16px 60px}
  .landing .lnd-body > .app-footer{margin-bottom:calc(108px + env(safe-area-inset-bottom))}
  .login-stage > .app-footer{max-width:420px;margin-top:12px}
  .app-footer{flex-direction:column-reverse;text-align:center;margin:0 16px 16px;margin-bottom:calc(108px + env(safe-area-inset-bottom))}
  .login-stage > .app-footer,.landing .lnd-body > .app-footer{margin-left:0;margin-right:0}
  .login-stage > .app-footer{margin-bottom:max(16px,env(safe-area-inset-bottom))}
  .dash-desktop{display:none}
  .dash-mobile{display:block}
  .lf-demo-grid{grid-template-columns:repeat(2,1fr)}
  .hero{padding:22px 20px;border-radius:var(--r-lg)}
  .hero-title{font-size:22px}
  .kpi-grid{grid-template-columns:repeat(2,1fr)}
  .md-footer{flex-direction:column-reverse;gap:8px}
  .md-footer .btn{width:100%}
  .panel-body{padding:16px}
  .lesson-item{padding:12px 14px;gap:12px;flex-wrap:wrap;align-items:flex-start}
  .lesson-item .lesson-info{flex:1 1 calc(100% - 52px);min-width:0}
  .lesson-item > .btn,.lesson-item > .btn-sm,.lesson-item > .btn-icon,.lesson-item > .btn-ghost{margin-left:auto;flex-shrink:0}
  .lesson-item .btn-sm{min-height:36px}
  .topic-block > div:first-child{flex-wrap:wrap;gap:8px!important}
  .topic-block > div:first-child > div[style*="flex:1"]{flex:1 1 100%!important;min-width:0}
  .toolbar{gap:8px}
  .toolbar .btn{flex:1;min-width:0;justify-content:center}
  .tbl th,.tbl td{padding:10px 12px;font-size:13px}
  .cl-cover{height:120px}
  .cl-body{padding:14px 16px}
  .nav-pop{right:16px}
}
@media(max-width:480px){
  .nav-edit-toggle span{display:none}
  .nav-edit-toggle{padding:8px;min-width:36px;justify-content:center;gap:0}
  .class-grid{grid-template-columns:1fr}
  .app-menu-grid{grid-template-columns:repeat(4,1fr);gap:10px}
  .app-tile .ic{width:50px;height:50px;font-size:22px;border-radius:16px}
  .sd-grid-2{grid-template-columns:1fr}
  .learn-lesson-foot .btn{font-size:13px;padding:0 12px}
  .chips{flex-wrap:nowrap;overflow-x:auto;margin:0 -16px;padding:0 16px 6px}
  .mob-dock-bar{padding:14px 14px 12px;gap:4px}
  .mob-dock-item{padding:0 4px 4px;max-width:76px}
  .mob-dock-fab{padding:0 6px 4px;max-width:84px;margin-top:-12px}
  .mob-dock-fab .mob-dock-ic{width:50px;height:50px}
  .mob-dock-fab .mob-dock-ic i{font-size:23px}
}
@media(min-width:769px){
  .mob-dock{display:none!important}
}