/* NIA Math Academy — design system v2 (2026-10-31) */
:root{
  --bg:#ffffff;--bg-soft:#f6f7fb;--bg-tint:#f1f0ff;
  --ink:#0e1024;--ink-2:#2c3050;--muted:#646985;--line:#e6e7f0;--line-2:#d6d8e6;
  --brand:#4f46e5;--brand-2:#6d5cf6;--brand-ink:#3127b8;--brand-soft:#eef0ff;
  --accent:#ff8a3d;--accent-soft:#fff1e7;
  --mint:#10b981;--mint-soft:#e7f8f1;--sky:#0ea5e9;--sky-soft:#e6f6fd;--sun:#f5b301;--sun-soft:#fff7dc;
  --danger:#dc2626;--danger-soft:#fdecec;
  --night:#0b0d1f;--night-2:#151935;
  --r-sm:10px;--r:14px;--r-lg:22px;--r-xl:32px;
  --sh-1:0 1px 2px rgba(14,16,36,.06),0 1px 1px rgba(14,16,36,.04);
  --sh-2:0 10px 30px -12px rgba(30,27,94,.18),0 2px 6px rgba(14,16,36,.05);
  --sh-3:0 30px 80px -30px rgba(49,39,184,.35),0 10px 30px -15px rgba(14,16,36,.15);
  --f-head:"Manrope",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1180px;
  /* legacy aliases used by older views */
  --green:var(--brand);--gold:var(--sun);--cream:var(--bg-soft);--deep:var(--night);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--f-body);font-feature-settings:"cv11","ss01";-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--f-head);font-feature-settings:"locl" 0;color:var(--ink);letter-spacing:-.025em;line-height:1.12;margin:0 0 .5em;font-weight:800}
h1{font-size:clamp(2.4rem,5.2vw,4.25rem);letter-spacing:-.04em;line-height:1.04}
h2{font-size:clamp(1.8rem,3.4vw,2.85rem);letter-spacing:-.035em}
h3{font-size:1.2rem;letter-spacing:-.015em}
p{margin:0 0 1em}
ul{padding-left:1.2em}
::selection{background:#c9c5ff}
:focus-visible{outline:3px solid #a5a0ff;outline-offset:2px;border-radius:6px}
.wrap{width:min(var(--wrap),calc(100% - 32px));margin-inline:auto}
.grad{background:linear-gradient(100deg,var(--brand) 0%,var(--brand-2) 55%,#a855f7 100%);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);-webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{height:80px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{font-feature-settings:"locl" 0;display:inline-flex;align-items:center;gap:10px;font:800 1.05rem/1 var(--f-head);letter-spacing:-.02em;white-space:nowrap}
.brand-logo{display:block;width:auto;flex:0 0 auto}
@media(max-width:860px){.nav{height:68px}.site-header .brand-logo{height:50px}}
.brand-mark{flex:0 0 auto;border-radius:10px;box-shadow:0 6px 16px -6px rgba(79,70,229,.7)}
.brand small{font:600 .95rem/1 var(--f-head);color:var(--muted);letter-spacing:-.01em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links>a:not(.btn){padding:8px 12px;border-radius:999px;color:var(--ink-2);font-weight:550;font-size:.95rem}
.nav-links>a:not(.btn):hover{background:var(--bg-soft);color:var(--ink)}
.nav-links form{margin:0}
.nav-toggle{display:none}
@media(max-width:860px){
  .nav-links{position:fixed;inset:68px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;padding:12px 16px 20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-2);transform:translateY(-8px);opacity:0;pointer-events:none;transition:.18s}
  .nav-links>a:not(.btn){padding:12px 10px;font-size:1rem}
  .nav-links .btn,.nav-links form .btn{width:100%;margin-top:6px}
  .nav-open .nav-links{transform:none;opacity:1;pointer-events:auto}
  .nav-toggle{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;padding:0}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;box-shadow:0 6px 0 var(--ink),0 -6px 0 var(--ink)}
}

/* ---------- buttons ---------- */
:where(form,.panel) button:where(:not(.plain,.nav-toggle,.seg-btn)),.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:11px 18px;background:var(--brand);color:#fff;font:650 .95rem/1.2 var(--f-body);letter-spacing:-.005em;cursor:pointer;white-space:nowrap;transition:background .15s,box-shadow .15s,transform .15s,border-color .15s;box-shadow:0 1px 0 rgba(255,255,255,.18) inset,0 6px 16px -8px rgba(79,70,229,.7)}
:where(form,.panel) button:where(:not(.plain,.nav-toggle,.seg-btn)):hover,.btn:hover{background:var(--brand-ink)}
.btn:active{transform:translateY(1px)}
.btn.lg{padding:14px 22px;font-size:1rem;border-radius:14px}
.btn.sm{padding:7px 12px;font-size:.85rem;border-radius:10px}
.btn.light,button.light,.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line-2);box-shadow:var(--sh-1)}
.btn.light:hover,button.light:hover,.btn.ghost:hover{background:var(--bg-soft);border-color:#c7c9da}
.btn.dark{background:var(--ink);box-shadow:none}.btn.dark:hover{background:#262a4a}
.btn.white{background:#fff;color:var(--brand-ink);box-shadow:none}.btn.white:hover{background:var(--brand-soft)}
.btn.danger,button.danger{background:#fff;color:var(--danger);border-color:#f3c4c4;box-shadow:none}.btn.danger:hover,button.danger:hover{background:var(--danger-soft)}
.btn.link{background:none;border:0;box-shadow:none;color:var(--brand);padding:0}.btn.link:hover{background:none;color:var(--brand-ink)}

/* ---------- forms ---------- */
.field{display:grid;gap:6px;margin-bottom:16px}
label{font-weight:600;font-size:.92rem;color:var(--ink-2)}
input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=color]),select,textarea{width:100%;border:1px solid var(--line-2);border-radius:12px;padding:11px 14px;background:#fff;color:var(--ink);font:inherit;font-size:.97rem;transition:border-color .15s,box-shadow .15s}
input:focus,select,textarea:focus{outline:none}
input:not([type=checkbox]):not([type=radio]):focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,70,229,.14)}
input[type=checkbox],input[type=radio]{accent-color:var(--brand);width:18px;height:18px;vertical-align:-3px}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5 6 6.5l5-5' stroke='%23646985' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}
textarea{min-height:120px;resize:vertical}
.error{color:var(--danger);font-size:.88rem}
.muted{color:var(--muted)}

/* ---------- surfaces ---------- */
main.app{padding:40px 0 96px;background:var(--bg-soft);min-height:calc(100vh - 80px)}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,3.4vw,36px);box-shadow:var(--sh-1)}
.panel+.panel{margin-top:20px}
.card{background:#fff;border:1px solid var(--line);padding:20px;border-radius:var(--r);transition:border-color .15s,box-shadow .15s}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand-ink);font-weight:600;font-size:.78rem;line-height:1.5}
.pill.mint{background:var(--mint-soft);color:#047857}.pill.sun{background:var(--sun-soft);color:#8a6100}.pill.sky{background:var(--sky-soft);color:#0369a1}.pill.gray{background:var(--bg-soft);color:var(--muted)}.pill.danger{background:var(--danger-soft);color:#b91c1c}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0;max-width:100%}
.tabs>label.card{cursor:pointer;font-weight:500;font-size:.93rem}
.tabs>label.card:has(input:checked){border-color:var(--brand);background:var(--brand-soft)!important;color:var(--brand-ink)}
.notice{display:block;padding:14px 18px;border-radius:var(--r);background:var(--mint-soft);border:1px solid #bdeedb;color:#065f46;margin-bottom:20px;font-weight:500}
.notice.error-box{background:var(--danger-soft);border-color:#f6c9c9;color:#991b1b}
.notice ul{margin:6px 0 0}
table{width:100%;border-collapse:collapse;font-size:.94rem}
th{text-align:left;font-weight:600;color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
th,td{padding:12px 10px;border-bottom:1px solid var(--line)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand-ink);font:700 .78rem/1 var(--f-body);letter-spacing:.02em}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:currentColor;display:inline-block}
.page-head{margin-bottom:26px}
.page-head h1{font-size:clamp(1.9rem,3.6vw,2.6rem)}

/* ---------- marketing sections ---------- */
.section{padding:clamp(64px,9vw,120px) 0}
.section.soft{background:var(--bg-soft)}
.section-head{max-width:720px;margin:0 0 48px}
.section-head.center{margin-inline:auto;text-align:center}
.section-head p{font-size:1.1rem;color:var(--muted);margin-top:14px}
.lead{font-size:clamp(1.05rem,1.4vw,1.2rem);color:var(--ink-2);max-width:620px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;transition:transform .2s,box-shadow .2s,border-color .2s}
.feature:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#d9d8f7}
.feature p{color:var(--muted);margin:0;font-size:.97rem}
.ico{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;background:var(--brand-soft);color:var(--brand)}
.ico svg{width:22px;height:22px}
.ico.mint{background:var(--mint-soft);color:var(--mint)}.ico.sun{background:var(--sun-soft);color:#c98a00}.ico.sky{background:var(--sky-soft);color:var(--sky)}.ico.accent{background:var(--accent-soft);color:var(--accent)}
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.checklist li{display:flex;gap:12px;align-items:flex-start;color:var(--ink-2)}
.checklist li::before{content:"";flex:0 0 22px;height:22px;border-radius:50%;background:var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='10' fill='none'%3E%3Cpath d='m1 5 3.2 3L11 1.5' stroke='%234f46e5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center no-repeat;margin-top:1px}
.dark-band{background:radial-gradient(1200px 500px at 85% -10%,rgba(109,92,246,.45),transparent 60%),radial-gradient(900px 500px at 0% 110%,rgba(14,165,233,.22),transparent 60%),var(--night);color:#e7e8f5}
.dark-band h2,.dark-band h3{color:#fff}
.dark-band .muted,.dark-band p{color:#a9acc8}
.dark-band .feature{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.09)}
.dark-band .feature:hover{border-color:rgba(165,160,255,.4);box-shadow:none}
.dark-band .ico{background:rgba(124,113,255,.16);color:#b7b1ff}

/* ---------- footer ---------- */
.site-footer{background:var(--night);color:#a9acc8;padding:64px 0 36px;font-size:.94rem}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:32px}
.site-footer h4{color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;font-family:var(--f-body);font-weight:700;margin-bottom:14px}
.site-footer a{display:block;padding:4px 0;color:#c7c9e0}.site-footer a:hover{color:#fff}
.site-footer .brand{color:#fff;margin-bottom:14px}
.site-footer .brand small{color:#8d90b0}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.08);margin-top:44px;padding-top:24px;font-size:.86rem}

/* ---------- classroom mock (home + recruitment) ---------- */
.mock{position:relative;border-radius:20px;background:#fff;border:1px solid #e3e4f0;box-shadow:var(--sh-3);overflow:hidden}
.mock-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:#fbfbfe;font-size:.82rem;color:var(--muted)}
.dots{display:flex;gap:6px}.dots i{width:10px;height:10px;border-radius:50%;background:#e2e3ee}.dots i:first-child{background:#ff6b6b}.dots i:nth-child(2){background:#ffc145}.dots i:nth-child(3){background:#36d07b}
.mock-title{font-weight:600;color:var(--ink-2)}
.live{margin-left:auto;display:inline-flex;align-items:center;gap:6px;padding:4px 9px;border-radius:999px;background:#ffecec;color:#d92d2d;font-weight:700;font-size:.72rem;letter-spacing:.04em}
.live::before{content:"";width:7px;height:7px;border-radius:50%;background:#ef4444;animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.35}}
.mock-body{display:grid;grid-template-columns:44px 1fr 168px;min-height:360px}
.mock-tools{border-right:1px solid var(--line);padding:10px 6px;display:flex;flex-direction:column;gap:6px;align-items:center;background:#fbfbfe}
.mock-tools b{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;color:var(--muted);font:600 .8rem/1 var(--f-body)}
.mock-tools b.on{background:var(--brand-soft);color:var(--brand)}
.board{position:relative;background-image:radial-gradient(#dfe1ee 1px,transparent 1px);background-size:18px 18px;padding:22px 24px}
.board{padding-top:30px!important}.board .eq{font:600 1.55rem/1.2 "Cambria Math","Times New Roman",serif;color:var(--ink)}
.board .eq.hand{color:var(--brand);font-style:italic}
.board svg{position:absolute;right:16px;bottom:16px;width:58%;height:auto}
.sticky{position:absolute;left:22px;bottom:22px;background:#fff7dc;border:1px solid #f6e3a3;border-radius:10px;padding:8px 11px;font-size:.78rem;color:#7a5600;box-shadow:var(--sh-1);max-width:170px}
.mock-side{border-left:1px solid var(--line);padding:10px;display:flex;flex-direction:column;gap:8px;background:#fbfbfe}
.vid{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:4/3;background:linear-gradient(135deg,#c7d2fe,#e9d5ff)}
.vid img{width:100%;height:100%;object-fit:cover}
.vid.st{background:linear-gradient(135deg,#bae6fd,#bbf7d0);display:grid;place-items:center;font:800 1.4rem/1 var(--f-head);color:#0f5132}
.vid span{position:absolute;left:6px;bottom:6px;background:rgba(14,16,36,.66);color:#fff;font-size:.66rem;padding:2px 7px;border-radius:6px}
.bubble{background:#fff;border:1px solid var(--line);border-radius:10px;padding:7px 9px;font-size:.74rem;color:var(--ink-2)}
.bubble b{display:block;font-size:.68rem;color:var(--brand)}
.float{position:absolute;z-index:2;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh-2);padding:10px 14px;font-size:.84rem;display:flex;align-items:center;gap:10px;font-weight:600}
.float small{display:block;font-weight:500;color:var(--muted);font-size:.75rem}
.float .em{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-size:1rem}
.f1{left:-34px;top:-22px}.f2{right:-18px;bottom:-18px}
.hero-visual{position:relative}
@media(max-width:720px){.mock-body{grid-template-columns:38px 1fr;min-height:300px}.mock-side{display:none}.board .eq{font-size:1.2rem}.sticky{display:none}.f1{display:none}.f2{right:10px;bottom:-14px}}
@media(max-width:960px){.feature-grid,.cards{grid-template-columns:repeat(2,1fr)}.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.feature-grid,.cards,.grid{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* Admin */
.admin-nav{display:flex;gap:6px;flex-wrap:wrap;padding:6px;margin:0 0 26px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--shadow-sm,0 1px 2px rgba(15,23,42,.05))}
.admin-nav a{display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:12px;font-weight:600;color:var(--ink-2,#334155);text-decoration:none}
.admin-nav a:hover{background:var(--bg-soft)}
.admin-nav a.on{background:var(--brand);color:#fff}
.admin-nav b{min-width:22px;height:22px;padding:0 7px;border-radius:99px;background:var(--danger);color:#fff;font-size:.74rem;display:inline-grid;place-items:center}
.admin-nav a.on b{background:#fff;color:var(--brand)}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.kpi{min-width:0;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;padding:18px 20px}
.kpi span{color:var(--muted);font-size:.86rem;font-weight:600}.kpi strong{display:block;font:800 1.9rem/1.1 var(--f-head);margin-top:6px}.kpi small{color:var(--muted)}
.queue{display:grid;grid-template-columns:minmax(0,1fr);gap:10px}
.qi{display:flex;gap:14px;align-items:center;flex-wrap:wrap;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.qi .grow{flex:1;min-width:min(220px,100%)}.qi form{margin:0}
.qi.urgent{border-color:#f6c9c9;background:#fffafa}
.pay-form{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:12px}
.pay-form .field{margin:0;min-width:0}.pay-form select,.pay-form input:not([type=checkbox]){width:100%;min-width:0}.pay-form .wide{grid-column:1/-1}
.ledger{width:100%;border-collapse:collapse;font-size:.92rem}.ledger th,.ledger td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line)}.ledger th{color:var(--muted);font-weight:600;font-size:.8rem}
@media(max-width:860px){.kpis{grid-template-columns:1fr 1fr}.pay-form{grid-template-columns:minmax(0,1fr)}.ledger{display:block;overflow-x:auto}.admin-nav{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}.admin-nav a{white-space:nowrap;padding:8px 12px}}
@media(max-width:560px){.kpis{grid-template-columns:1fr}.kpi strong{font-size:1.6rem}}