/* Mathnetic Online Academy — design system */
:root{
  --navy-950:#071433;--navy-900:#0a1a3f;--navy-800:#0f2557;--navy-700:#153070;--royal:#1f4fd8;--royal-600:#1a43b8;--royal-100:#e6edff;--royal-50:#f1f5ff;
  --gold:#f2b134;--gold-600:#d9961a;--gold-100:#fff4d9;
  --bg:#f5f7fc;--surface:#fff;--text:#152042;--muted:#5a6788;--border:#e1e7f3;--border-strong:#c9d3e8;
  --ok:#0e9f6e;--ok-bg:#e3f7ee;--warn:#c47a05;--warn-bg:#fff2d6;--bad:#d03b3b;--bad-bg:#fde8e8;--info:#1f4fd8;--info-bg:#e6edff;
  --radius:14px;--radius-sm:9px;--shadow:0 1px 2px rgba(10,26,63,.05),0 6px 20px rgba(10,26,63,.06);--shadow-lg:0 10px 40px rgba(10,26,63,.16);
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;--font-h:'Plus Jakarta Sans','Inter',system-ui,sans-serif;
}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.55;font-size:15px}
h1,h2,h3,h4{font-family:var(--font-h);line-height:1.2;margin:0 0 .5em;color:var(--navy-900);letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.5vw,3.3rem);font-weight:800}h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800}h3{font-size:1.15rem;font-weight:700}h4{font-size:1rem;font-weight:700}
p{margin:0 0 1em}a{color:var(--royal);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%}button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(31,79,216,.45);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}.small{font-size:.86rem}.center{text-align:center}.right{text-align:right}.nowrap{white-space:nowrap}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.row.between{justify-content:space-between}.stack{display:flex;flex-direction:column;gap:12px}.grow{flex:1}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.icon{width:1.15em;height:1.15em;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.2em;flex:none}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:999px;border:1.5px solid transparent;font-weight:600;font-size:.94rem;cursor:pointer;background:var(--royal);color:#fff;transition:.15s;text-decoration:none!important;line-height:1.2;white-space:nowrap}
.btn:hover{background:var(--royal-600);transform:translateY(-1px)}.btn:active{transform:none}.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.btn.gold{background:var(--gold);color:var(--navy-950)}.btn.gold:hover{background:var(--gold-600)}
.btn.ghost{background:transparent;color:var(--navy-900);border-color:var(--border-strong)}.btn.ghost:hover{background:var(--royal-50);border-color:var(--royal)}
.btn.light{background:#fff;color:var(--navy-900)}.btn.light:hover{background:var(--royal-50)}
.btn.outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}.btn.outline-light:hover{background:rgba(255,255,255,.12)}
.btn.danger{background:var(--bad)}.btn.danger:hover{background:#b62f2f}.btn.sm{padding:6px 12px;font-size:.84rem}.btn.lg{padding:14px 26px;font-size:1.02rem}.btn.block{width:100%}
.btn.link{background:none;color:var(--royal);padding:4px 6px;border:none}.btn.link:hover{background:var(--royal-50);transform:none}

/* badges */
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.76rem;font-weight:700;background:#eef1f8;color:var(--muted);white-space:nowrap;text-transform:capitalize}
.badge.ok,.badge.active,.badge.paid,.badge.graded,.badge.present,.badge.published,.badge.approved,.badge.verified,.badge.completed,.badge.matched{background:var(--ok-bg);color:var(--ok)}
.badge.warn,.badge.pending,.badge.submitted,.badge.late,.badge.under_review,.badge.needs_review,.badge.awaiting_verification,.badge.draft,.badge.reviewing,.badge.interview,.badge.demo_required,.badge.new,.badge.scheduled,.badge.paused,.badge.upcoming{background:var(--warn-bg);color:var(--warn)}
.badge.bad,.badge.overdue,.badge.absent,.badge.rejected,.badge.suspended,.badge.cancelled,.badge.removed,.badge.void,.badge.closed,.badge.dropped{background:var(--bad-bg);color:var(--bad)}
.badge.info,.badge.live,.badge.available,.badge.in_progress,.badge.excused,.badge.returned{background:var(--info-bg);color:var(--info)}

/* cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.card.flat{box-shadow:none}.card h3{margin-bottom:.6em}.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.card-head h3{margin:0}
.stat{display:flex;gap:14px;align-items:center}.stat .ico{width:44px;height:44px;border-radius:12px;background:var(--royal-100);color:var(--royal);display:grid;place-items:center;font-size:1.2rem;flex:none}
.stat .val{font-family:var(--font-h);font-size:1.7rem;font-weight:800;color:var(--navy-900);line-height:1}.stat .lbl{font-size:.82rem;color:var(--muted);margin-top:4px}
.stat.gold .ico{background:var(--gold-100);color:var(--gold-600)}.stat.ok .ico{background:var(--ok-bg);color:var(--ok)}.stat.warn .ico{background:var(--warn-bg);color:var(--warn)}
a.stat-link{color:inherit;text-decoration:none}a.stat-link:hover .card{border-color:var(--royal)}

/* progress */
.bar{height:9px;background:#e9eefa;border-radius:99px;overflow:hidden}.bar>span{display:block;height:100%;background:linear-gradient(90deg,var(--royal),#4f7bf0);border-radius:99px;transition:width .5s}
.bar.gold>span{background:linear-gradient(90deg,var(--gold-600),var(--gold))}.bar.ok>span{background:var(--ok)}.bar.bad>span{background:var(--bad)}
.donut{position:relative;width:110px;height:110px;flex:none}.donut svg{transform:rotate(-90deg)}.donut .n{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--font-h);font-weight:800;font-size:1.35rem;color:var(--navy-900)}

/* forms */
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:14px}.field label,.field .lbl{font-weight:600;font-size:.86rem;color:var(--navy-800)}.field .req{color:var(--bad)}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1.5px solid var(--border-strong);border-radius:var(--radius-sm);background:#fff;transition:.15s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--royal);outline:none;box-shadow:0 0 0 3px rgba(31,79,216,.15)}
.field textarea{min-height:90px;resize:vertical}.field .help{font-size:.8rem;color:var(--muted)}
.checks{display:flex;flex-wrap:wrap;gap:8px}.checks label{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1.5px solid var(--border-strong);border-radius:99px;font-weight:500;font-size:.86rem;cursor:pointer;background:#fff}
.checks input{width:auto;accent-color:var(--royal)}.checks label:has(input:checked){border-color:var(--royal);background:var(--royal-50);color:var(--royal)}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 18px}.form-grid .full{grid-column:1/-1}@media(max-width:640px){.form-grid{grid-template-columns:1fr}}
.form-error{background:var(--bad-bg);color:var(--bad);padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:12px;font-size:.9rem;font-weight:500}
.form-ok{background:var(--ok-bg);color:var(--ok);padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:12px;font-weight:500}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.filters input,.filters select{padding:9px 12px;border:1.5px solid var(--border-strong);border-radius:99px;background:#fff;min-width:140px}.filters input[type=search]{min-width:220px}

/* tables */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:.9rem}th{background:#f6f8fd;text-align:left;font-size:.76rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);padding:11px 14px;white-space:nowrap}
td{padding:12px 14px;border-top:1px solid var(--border);vertical-align:middle}tr:hover td{background:#fafbff}td.actions{white-space:nowrap;text-align:right}
@media(max-width:720px){.table-wrap.cards{border:none;background:none}.cards table,.cards tbody,.cards tr,.cards td{display:block}.cards thead{display:none}.cards tr{background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;padding:8px 4px}
  .cards td{border:none;padding:6px 14px;display:flex;justify-content:space-between;gap:12px;text-align:right}.cards td::before{content:attr(data-label);font-weight:600;color:var(--muted);text-align:left;font-size:.8rem}.cards td.actions{justify-content:flex-end}}

/* empty state */
.empty{text-align:center;padding:36px 20px;color:var(--muted)}.empty .ico{width:56px;height:56px;border-radius:50%;background:var(--royal-50);color:var(--royal);display:grid;place-items:center;margin:0 auto 12px;font-size:1.5rem}.empty h4{color:var(--navy-800);margin-bottom:4px}.empty p{max-width:420px;margin:0 auto 12px}
.notice{background:var(--gold-100);border:1px solid #f5d98d;color:#6b4a05;padding:10px 14px;border-radius:var(--radius-sm);font-size:.88rem}.notice.info{background:var(--royal-50);border-color:#c6d5fb;color:var(--navy-800)}

/* modal / toast */
.modal-back{position:fixed;inset:0;background:rgba(7,20,51,.55);display:grid;place-items:center;z-index:100;padding:16px;overflow-y:auto;backdrop-filter:blur(2px)}
.modal{background:#fff;border-radius:18px;width:100%;max-width:640px;max-height:92vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:pop .18s}.modal.wide{max-width:920px}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:2}.modal-head h3{margin:0}.modal-body{padding:22px}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.98)}}
#toasts{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:10px;z-index:200}.toast{background:var(--navy-900);color:#fff;padding:12px 18px;border-radius:12px;box-shadow:var(--shadow-lg);max-width:340px;font-size:.92rem;animation:pop .2s}.toast.err{background:var(--bad)}.toast.ok{background:var(--ok)}
.spinner{width:28px;height:28px;border:3px solid var(--royal-100);border-top-color:var(--royal);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}@keyframes spin{to{transform:rotate(360deg)}}
.tabs{display:flex;gap:4px;border-bottom:2px solid var(--border);margin-bottom:18px;overflow-x:auto}.tab{padding:10px 16px;font-weight:600;color:var(--muted);cursor:pointer;border:none;background:none;border-bottom:3px solid transparent;margin-bottom:-2px;white-space:nowrap}.tab.on{color:var(--royal);border-color:var(--royal)}
.kv{display:grid;grid-template-columns:150px 1fr;gap:8px 14px;font-size:.92rem}.kv dt{color:var(--muted)}.kv dd{margin:0;word-break:break-word}
.list{list-style:none;margin:0;padding:0}.list li{padding:12px 0;border-bottom:1px solid var(--border);display:flex;gap:12px;align-items:center;justify-content:space-between}.list li:last-child{border:none}

/* logo */
.logo{display:inline-flex;align-items:center;gap:10px;color:inherit;text-decoration:none!important}.logo-mark{width:40px;height:40px;border-radius:11px;background:linear-gradient(135deg,var(--royal),var(--navy-800));color:#fff;display:grid;place-items:center;font-family:var(--font-h);font-weight:800;font-size:1.05rem;letter-spacing:-.04em;position:relative;overflow:hidden;flex:none}
.logo-mark::after{content:"";position:absolute;right:-8px;bottom:-8px;width:20px;height:20px;border-radius:50%;background:var(--gold);opacity:.95}.logo-mark img{width:100%;height:100%;object-fit:contain;background:#fff}.logo-mark.has-img::after{display:none}
.logo-txt{font-family:var(--font-h);font-weight:800;line-height:1.05;color:var(--navy-900)}.logo-txt small{display:block;font-weight:600;font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.on-dark .logo-txt,.on-dark .logo-txt small{color:#fff}.on-dark .logo-txt small{opacity:.7}

/* ===== PUBLIC SITE ===== */
.pub-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.pub-header .container{display:flex;align-items:center;gap:22px;height:70px}.pub-nav{display:flex;gap:2px;align-items:center;flex:1;justify-content:center}
.pub-nav a,.pub-nav button.more{padding:8px 11px;border-radius:9px;color:var(--navy-800);font-weight:600;font-size:.9rem;text-decoration:none;background:none;border:none;cursor:pointer}.pub-nav a:hover,.pub-nav button.more:hover,.pub-nav a.on{background:var(--royal-50);color:var(--royal);text-decoration:none}
.dd{position:relative}.dd-menu{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;min-width:210px;display:none;z-index:60}.dd.open .dd-menu{display:block}.dd-menu a{display:block}
.pub-actions{display:flex;gap:8px;align-items:center}.burger{display:none;background:none;border:1px solid var(--border);border-radius:10px;padding:8px;cursor:pointer;color:var(--navy-900);font-size:1.3rem}
@media(max-width:1700px){.pub-nav{display:none}.burger{display:inline-flex}.pub-header .container{justify-content:space-between}.pub-actions .hide-m{display:none}.pub-nav.open{display:flex;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);max-height:calc(100vh - 70px);overflow-y:auto}}
.hero{background:radial-gradient(1200px 500px at 85% -10%,rgba(79,123,240,.45),transparent 60%),linear-gradient(160deg,var(--navy-950),var(--navy-800) 70%);color:#fff;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:repeating-radial-gradient(circle at 92% 30%,transparent 0 46px,rgba(255,255,255,.045) 47px 48px);pointer-events:none}
.hero .container{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding-top:76px;padding-bottom:84px}
.hero h1{color:#fff}.hero h1 em{font-style:normal;color:var(--gold)}.hero p.lead{font-size:1.16rem;color:#d3ddf5;max-width:560px}.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:14px}
.hero-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:20px;padding:26px;backdrop-filter:blur(6px)}.hero-card h3{color:#fff}.hero-card li{color:#dbe4fb;padding:8px 0;display:flex;gap:10px;align-items:flex-start;list-style:none}.hero-card ul{margin:0;padding:0}.hero-card .icon{color:var(--gold);margin-top:3px}
@media(max-width:900px){.hero .container{grid-template-columns:1fr;padding-top:48px;padding-bottom:56px}}
.section{padding:72px 0}.section.alt{background:#fff;border-block:1px solid var(--border)}.section.dark{background:var(--navy-900);color:#dbe4fb}.section.dark h2,.section.dark h3{color:#fff}
.section-head{max-width:680px;margin:0 auto 40px;text-align:center}.section-head p{color:var(--muted);font-size:1.05rem}.section.dark .section-head p{color:#b9c7ea}
.feature{padding:24px}.feature .ico{width:50px;height:50px;border-radius:14px;background:var(--royal-100);color:var(--royal);display:grid;place-items:center;font-size:1.4rem;margin-bottom:14px}.feature p{color:var(--muted);margin:0}
.chip{display:inline-block;padding:6px 14px;border-radius:99px;background:#fff;border:1px solid var(--border-strong);font-weight:600;font-size:.86rem;color:var(--navy-800);margin:4px}.chip.soft{background:var(--royal-50);border-color:#cbd8fb;color:var(--royal)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.step{counter-increment:s;position:relative;padding:22px 18px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}.step::before{content:counter(s);display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--navy-900);color:var(--gold);font-weight:800;margin-bottom:10px;font-family:var(--font-h)}.step h4{margin-bottom:4px}.step p{color:var(--muted);font-size:.88rem;margin:0}
@media(max-width:980px){.steps{grid-template-columns:1fr 1fr}}@media(max-width:560px){.steps{grid-template-columns:1fr}}
.tutor-card{display:flex;flex-direction:column;gap:10px}.avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--royal),var(--navy-800));color:#fff;display:grid;place-items:center;font-weight:800;font-family:var(--font-h);font-size:1.3rem;overflow:hidden;flex:none}.avatar img{width:100%;height:100%;object-fit:cover}
.cta-band{background:linear-gradient(120deg,var(--navy-800),var(--royal-600));color:#fff;border-radius:22px;padding:44px;display:flex;justify-content:space-between;gap:24px;align-items:center;flex-wrap:wrap}.cta-band h2{color:#fff;margin:0 0 6px}.cta-band p{margin:0;color:#d3ddf5}
.page-hero{background:linear-gradient(160deg,var(--navy-900),var(--navy-700));color:#fff;padding:56px 0}.page-hero h1{color:#fff;font-size:clamp(1.8rem,3.6vw,2.6rem);margin:0 0 8px}.page-hero p{color:#cbd8f6;max-width:660px;margin:0}
.prose{max-width:780px}.prose h2{margin-top:1.6em;font-size:1.4rem}.prose h3{margin-top:1.3em}.prose li{margin-bottom:.4em}
details.faq{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:2px 18px;margin-bottom:10px}details.faq summary{cursor:pointer;font-weight:700;padding:14px 0;color:var(--navy-900);list-style:none;display:flex;justify-content:space-between;gap:10px}details.faq summary::after{content:"+";font-size:1.3rem;color:var(--royal)}details.faq[open] summary::after{content:"–"}details.faq p{color:var(--muted)}
.pub-footer{background:var(--navy-950);color:#aab8dc;padding:56px 0 24px}.pub-footer h4{color:#fff;font-size:.9rem;margin-bottom:12px}.pub-footer a{color:#aab8dc;display:block;padding:3px 0;font-size:.9rem}.pub-footer a:hover{color:#fff}.pub-footer .cols{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:32px}@media(max-width:800px){.pub-footer .cols{grid-template-columns:1fr 1fr}}
.pub-footer .fine{border-top:1px solid rgba(255,255,255,.1);margin-top:32px;padding-top:18px;font-size:.82rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.placeholder-flag{display:inline-block;background:var(--gold-100);color:#7a5406;border:1px dashed var(--gold-600);border-radius:6px;padding:0 6px;font-size:.72rem;font-weight:700;vertical-align:middle;margin-left:4px}
.auth-wrap{min-height:calc(100vh - 70px);display:grid;place-items:center;padding:36px 16px;background:linear-gradient(160deg,var(--royal-50),#fff)}.auth-card{width:100%;max-width:460px}.auth-card.wide{max-width:820px}
.stepper{display:flex;gap:8px;margin-bottom:22px}.stepper span{flex:1;height:6px;border-radius:9px;background:#e4eafa}.stepper span.on{background:var(--royal)}

/* ===== APP SHELL ===== */
.app{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.side{background:var(--navy-900);color:#c4d0ee;position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column;padding:18px 14px}
.side .logo{padding:4px 8px 18px}.side nav{display:flex;flex-direction:column;gap:2px;flex:1}.side .grp{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:#7385b3;padding:14px 12px 6px}
.side a.nav{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;color:#c4d0ee;font-weight:500;font-size:.92rem;text-decoration:none}.side a.nav:hover{background:rgba(255,255,255,.07);color:#fff}.side a.nav.on{background:var(--royal);color:#fff}
.side a.nav .count{margin-left:auto;background:var(--gold);color:var(--navy-950);font-size:.7rem;font-weight:800;border-radius:99px;padding:1px 8px}
.side .who{border-top:1px solid rgba(255,255,255,.1);padding:14px 8px 0;margin-top:14px;font-size:.84rem}.side .who b{color:#fff;display:block}
.main{min-width:0;display:flex;flex-direction:column}
.topbar{height:64px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:14px;padding:0 24px;position:sticky;top:0;z-index:30}
.topbar .burger{display:none}.topbar h2{font-size:1.15rem;margin:0;font-weight:800}.topbar .sp{flex:1}
.bell{position:relative;background:none;border:1px solid var(--border);border-radius:11px;width:40px;height:40px;display:grid;place-items:center;cursor:pointer;font-size:1.1rem;color:var(--navy-800)}.bell .dot{position:absolute;top:-5px;right:-5px;background:var(--bad);color:#fff;font-size:.66rem;font-weight:800;border-radius:99px;min-width:18px;height:18px;display:grid;place-items:center;padding:0 4px}
.notif-pop{position:absolute;right:0;top:48px;width:340px;max-height:420px;overflow-y:auto;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-lg);z-index:70;text-align:left}.notif-pop .it{padding:12px 16px;border-bottom:1px solid var(--border);display:block;color:var(--text);text-decoration:none;cursor:pointer}.notif-pop .it.unread{background:var(--royal-50)}.notif-pop .it b{display:block;font-size:.9rem}.notif-pop .it span{font-size:.82rem;color:var(--muted)}
.content{padding:26px;max-width:1360px;width:100%}.page-title{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;margin-bottom:22px}.page-title h1{font-size:1.65rem;margin:0}.page-title p{margin:4px 0 0;color:var(--muted)}
.scrim{display:none}
@media(max-width:980px){.app{grid-template-columns:1fr}.side{position:fixed;left:0;top:0;bottom:0;width:272px;z-index:90;transform:translateX(-100%);transition:transform .2s}.app.nav-open .side{transform:none}.app.nav-open .scrim{display:block;position:fixed;inset:0;background:rgba(7,20,51,.5);z-index:80}.topbar .burger{display:inline-grid}.content{padding:18px 14px 90px}.topbar{padding:0 14px}
  .student-tabbar{display:flex}}
.student-tabbar{display:none;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);z-index:40;justify-content:space-around;padding:6px 4px calc(6px + env(safe-area-inset-bottom))}.student-tabbar a{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.66rem;color:var(--muted);padding:4px 8px;text-decoration:none;font-weight:600;border-radius:8px}.student-tabbar a.on{color:var(--royal)}.student-tabbar .icon{font-size:1.35rem}
.hello{background:linear-gradient(120deg,var(--navy-800),var(--royal-600));color:#fff;border-radius:var(--radius);padding:24px 26px;position:relative;overflow:hidden}.hello h1{color:#fff;font-size:1.5rem;margin:0 0 4px}.hello p{color:#cfdcfb;margin:0}.hello::after{content:"";position:absolute;right:-40px;top:-40px;width:200px;height:200px;border-radius:50%;border:26px solid rgba(255,255,255,.07)}
.class-item{display:flex;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid var(--border)}.class-item:last-child{border:none}.datebox{width:54px;text-align:center;border-radius:12px;background:var(--royal-50);padding:6px 0;flex:none}.datebox b{display:block;font-size:1.25rem;line-height:1.1;color:var(--navy-900);font-family:var(--font-h)}.datebox span{font-size:.68rem;text-transform:uppercase;font-weight:700;color:var(--royal);letter-spacing:.06em}
.chart{display:flex;align-items:flex-end;gap:8px;height:150px;padding-top:10px}.chart .col{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:6px;height:100%;min-width:0}.chart .col i{display:block;width:100%;max-width:44px;background:linear-gradient(180deg,#5b86f5,var(--royal));border-radius:8px 8px 3px 3px;min-height:3px}.chart .col small{font-size:.68rem;color:var(--muted);text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.chart .col b{font-size:.72rem}
.hbars .r{display:grid;grid-template-columns:minmax(80px,150px) 1fr 44px;gap:10px;align-items:center;margin-bottom:9px;font-size:.86rem}.hbars .r span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lesson-row{display:flex;gap:12px;align-items:center;padding:11px 12px;border-radius:10px;cursor:pointer;border:1px solid transparent}.lesson-row:hover{background:var(--royal-50)}.lesson-row .tick{width:22px;height:22px;border-radius:50%;border:2px solid var(--border-strong);display:grid;place-items:center;color:#fff;font-size:.8rem;flex:none}.lesson-row.done .tick{background:var(--ok);border-color:var(--ok)}
.q-card{border:1.5px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:14px;background:#fff}.q-card .opt{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1.5px solid var(--border-strong);border-radius:10px;margin-top:8px;cursor:pointer}.q-card .opt:hover{background:var(--royal-50)}.q-card .opt:has(input:checked){border-color:var(--royal);background:var(--royal-50)}.q-card .opt input{accent-color:var(--royal);width:auto}
.q-card.ok{border-color:var(--ok)}.q-card.wrong{border-color:var(--bad)}
.exam-bar{position:sticky;top:64px;z-index:20;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:12px 18px;display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;box-shadow:var(--shadow)}.timer{font-family:var(--font-h);font-weight:800;font-size:1.4rem;color:var(--navy-900);font-variant-numeric:tabular-nums}.timer.low{color:var(--bad)}
.qnav{display:flex;flex-wrap:wrap;gap:6px}.qnav button{width:34px;height:34px;border-radius:9px;border:1.5px solid var(--border-strong);background:#fff;font-weight:700;cursor:pointer}.qnav button.done{background:var(--royal);color:#fff;border-color:var(--royal)}
.msg-wrap{display:grid;grid-template-columns:280px 1fr;gap:16px;min-height:480px}@media(max-width:760px){.msg-wrap{grid-template-columns:1fr}}
.thread{display:flex;flex-direction:column;gap:8px;max-height:400px;overflow-y:auto;padding:6px}.bubble{max-width:78%;padding:9px 14px;border-radius:16px;background:#eef2fb;align-self:flex-start;font-size:.92rem;white-space:pre-wrap;word-break:break-word}.bubble.me{background:var(--royal);color:#fff;align-self:flex-end}
.contact-item{padding:10px 12px;border-radius:10px;cursor:pointer;display:flex;gap:10px;align-items:center}.contact-item:hover,.contact-item.on{background:var(--royal-50)}
.pipeline{display:flex;gap:6px;flex-wrap:wrap}.pipeline .st{padding:5px 12px;border-radius:99px;background:#eef1f8;font-size:.8rem;font-weight:600;color:var(--muted)}.pipeline .st.on{background:var(--royal);color:#fff}
.secret{font-family:ui-monospace,monospace;background:#0a1a3f;color:#fff;padding:10px 14px;border-radius:10px;word-break:break-all;user-select:all}
@media print{.side,.topbar,.student-tabbar,.btn{display:none!important}.app{display:block}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* responsive safety net: inline multi-column grids collapse to one column on narrow screens */
@media(max-width:800px){.grid[style*="grid-template-columns"]{grid-template-columns:minmax(0,1fr)!important}}
.grid>*,.content>*,.stack>*{min-width:0}
.pub-nav a{white-space:nowrap}
/* Phase 3: long page titles must never push the bell/menu off-screen on phones */
.topbar h2{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar .bell{flex:none}