/* sinusal. · telas de entrada e painel das aulas (classes com prefixo sx- para não colidir com a aula) */
[hidden]{display:none!important}
.sx-body *,.sx-body *::before,.sx-body *::after{box-sizing:border-box}
:root{
  --sx-bg:#ffffff;--sx-ink:#202c28;--sx-ink2:#46524d;--sx-ink3:#5d6863;--sx-line:#e2ebe6;
  --sx-green:#176e5b;--sx-green-d:#125644;--sx-green-b:#38ae8b;--sx-mint:#e5f2eb;--sx-soft:#f5faf7;
  --sx-red:#9b2c47;--sx-amber:#f8efd6;--sx-amber-ink:#6e5110;
  --sx-serif:'Fraunces',Georgia,serif;--sx-sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
}
.sx-body{margin:0;min-height:100vh;background:var(--sx-bg);color:var(--sx-ink);font-family:var(--sx-sans);font-size:16px;line-height:1.55;
  background-image:radial-gradient(70% 45% at 100% 0%,#e7f4ee 0%,rgba(231,244,238,0) 70%),radial-gradient(60% 40% at 0% 100%,#eef6f2 0%,rgba(238,246,242,0) 70%)}
.sx-logo{display:inline-flex;align-items:center;gap:8px;font-weight:700;letter-spacing:-.02em;font-size:19px;color:var(--sx-ink);text-decoration:none}
.sx-logo .sx-mark{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:linear-gradient(145deg,#38ae8b,#165d4c);box-shadow:0 6px 14px -6px rgba(22,93,76,.6)}
.sx-logo .sx-mark svg{width:17px;height:17px}
.sx-logo b{color:var(--sx-green)}
.sx-glass{position:relative;border-radius:26px;border:1px solid #d3e8de;border-top-color:#fff;
  background:linear-gradient(160deg,rgba(255,255,255,.96),rgba(255,255,255,.82) 45%,rgba(239,247,243,.92));
  backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);
  box-shadow:inset 0 1px 0 #fff,0 30px 70px -40px rgba(16,60,44,.45),0 2px 10px -6px rgba(16,60,44,.12)}

/* tela de entrada */
.sx-gate{min-height:100vh;display:grid;place-items:center;padding:24px max(16px,env(safe-area-inset-right,0px)) 24px max(16px,env(safe-area-inset-left,0px))}
.sx-card{width:min(440px,100%);padding:30px 28px 24px;display:flex;flex-direction:column;gap:16px}
.sx-card h1{font-family:var(--sx-serif);font-weight:300;font-size:clamp(34px,8vw,44px);line-height:1;letter-spacing:-.03em;margin:6px 0 0}
.sx-card h1 em{color:var(--sx-green);font-style:italic}
.sx-sub{color:var(--sx-ink2);font-size:15.5px;margin:0}
.sx-tag{font-size:13px;font-weight:600;color:var(--sx-green)}
.sx-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;border-radius:999px;border:1px solid #d3e8de;background:#fff;color:var(--sx-ink);font:600 16px var(--sx-sans);cursor:pointer;padding:0 22px;transition:background .2s,border-color .2s}
.sx-btn:hover{background:var(--sx-soft);border-color:var(--sx-green-b)}
.sx-btn:focus-visible{outline:2px solid var(--sx-green);outline-offset:3px}
.sx-btn[disabled]{opacity:.6;cursor:wait}
.sx-btn.sx-primary{background:var(--sx-green);border-color:var(--sx-green);color:#fff}
.sx-btn.sx-primary:hover{background:var(--sx-green-d)}
.sx-btn.sx-small{min-height:38px;font-size:14px;padding:0 16px}
.sx-msg{font-size:14.5px;color:var(--sx-ink2);min-height:1.5em;margin:0}
.sx-msg.sx-erro{color:var(--sx-red)}
.sx-note{font-size:12.5px;color:var(--sx-ink3);margin:0}
.sx-foot{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--sx-ink3);border-top:1px solid var(--sx-line);padding-top:12px}
.sx-spin{width:18px;height:18px;border-radius:50%;border:2.5px solid #cfe5da;border-top-color:var(--sx-green);animation:sx-rot .8s linear infinite}
@keyframes sx-rot{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.sx-spin{animation:none}}

/* formulário de entrada: nome, turma e WhatsApp */
.sx-form{display:flex;flex-direction:column;gap:14px}
.sx-field{display:flex;flex-direction:column;gap:6px}
.sx-field label,.sx-label{font-size:14px;font-weight:600;color:var(--sx-ink)}
.sx-field input[type=text],.sx-field input[type=tel]{height:48px;border-radius:14px;border:1px solid #d3e8de;background:#fff;padding:0 14px;font:16px var(--sx-sans);color:var(--sx-ink)}
.sx-field input:focus{outline:2px solid var(--sx-green-b);outline-offset:0;border-color:transparent}
.sx-field input[aria-invalid=true]{border-color:var(--sx-red);background:#fdf3f5}
.sx-hint{font-size:12.5px;color:var(--sx-ink3)}
.sx-turmas{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}
.sx-turmas label{position:relative;cursor:pointer}
.sx-turmas input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.sx-turmas span{display:grid;place-items:center;height:44px;border-radius:12px;border:1px solid #d3e8de;background:#fff;font-weight:650;font-size:16px;color:var(--sx-ink2);transition:background .15s,border-color .15s,color .15s}
.sx-turmas input:checked+span{background:var(--sx-green);border-color:var(--sx-green);color:#fff}
.sx-turmas input:focus-visible+span{outline:2px solid var(--sx-green);outline-offset:2px}
.sx-form .sx-btn{margin-top:4px}

/* entrada com conta: abas, senha, "ou", links */
.sx-field input[type=email],.sx-field input[type=password]{height:48px;border-radius:14px;border:1px solid #d3e8de;background:#fff;padding:0 14px;font:16px var(--sx-sans);color:var(--sx-ink);width:100%;box-sizing:border-box}
.sx-field input[type=text],.sx-field input[type=tel]{width:100%;box-sizing:border-box}
.sx-abas{display:grid;grid-template-columns:1fr 1fr;padding:4px;border-radius:15px;background:#eef5f1;border:1px solid var(--sx-line)}
.sx-abas button{min-height:42px;border:0;border-radius:11px;background:none;font:600 15px var(--sx-sans);color:var(--sx-ink2);cursor:pointer}
.sx-abas button[aria-selected=true]{background:#fff;color:var(--sx-green-d);box-shadow:0 1px 5px rgba(16,60,44,.14)}
.sx-abas button:focus-visible{outline:2px solid var(--sx-green);outline-offset:1px}
.sx-pass{position:relative}
.sx-pass input{padding-right:92px!important}
.sx-olho{position:absolute;right:6px;top:6px;height:36px;padding:0 12px;border:0;border-radius:10px;background:var(--sx-soft);font:600 13px var(--sx-sans);color:var(--sx-ink2);cursor:pointer}
.sx-olho:focus-visible{outline:2px solid var(--sx-green);outline-offset:1px}
.sx-link{align-self:center;border:0;background:none;padding:8px 4px;font:600 14px var(--sx-sans);color:var(--sx-green-d);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.sx-link:hover{color:var(--sx-green)}
.sx-ou{display:flex;align-items:center;gap:12px;color:var(--sx-ink3);font-size:13px}
.sx-ou::before,.sx-ou::after{content:"";flex:1;border-top:1px solid var(--sx-line)}
.sx-info{margin:0;padding:12px 14px;border-radius:14px;background:var(--sx-soft);border:1px solid var(--sx-line);font-size:14.5px;color:var(--sx-ink2)}
.sx-info .sx-link{padding:0;font-size:14px}
.sx-msg.sx-ok{color:var(--sx-green-d)}
.sx-appfoot .sx-link{padding:0;font-size:12.5px;color:var(--sx-ink3)}