/* beta.html: the teacher beta page */
.bt { max-width: 1080px; margin: 0 auto; padding: 110px 20px 60px; }
.bt-kick { font: 500 13px var(--mono); text-transform: uppercase; letter-spacing: .14em; color: var(--ink2); margin: 0 0 12px; }
.bt-hero, .bt-invite { text-align: center; max-width: 800px; margin: 0 auto 56px; }
.bt-hero h1, .bt-invite h1 { font: 600 clamp(36px, 6vw, 64px)/1.03 var(--serif); letter-spacing: -0.04em; margin: 0 0 18px; }
.bt-hero h1 em, .bt-invite h1 em { color: var(--red); }
.bt-sub { font-size: 19px; color: var(--ink2); margin: 0 0 28px; }
.bt-invite { padding: 40px 0 20px; }
.bt-inv-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.bt-inv-actions .note { flex-basis: 100%; color: var(--mute); font-size: 14px; margin: 6px 0 0; }

.bt-two { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 70px; }
.bt-box { padding: 26px 26px 22px; border: 1.5px solid var(--ink); border-radius: 20px; background: #fbf9f4; box-shadow: 4px 4px 0 var(--ink); }
.bt-box:first-child { background: #fff4ea; box-shadow: 4px 4px 0 var(--red); }
.bt-box h2 { font-size: 28px; margin: 0 0 14px; }
.bt-box ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; font-size: 16px; }
.bt-box li { padding-left: 24px; position: relative; }
.bt-box li::before { content: '✓'; position: absolute; left: 0; color: var(--red); font-weight: 700; }
.bt-honest { margin: 16px 0 0; padding-top: 14px; border-top: 1px dashed var(--line); color: var(--ink2); font-size: 15px; }

.bt-form-wrap { scroll-margin-top: 90px; border: 1.5px solid var(--ink); border-radius: 24px; background: #fbf9f4; padding: clamp(22px, 4vw, 40px); box-shadow: 6px 6px 0 var(--ink); }
.bt-form-head h2 { font-size: 40px; margin: 0 0 6px; }
.bt-form-head p { color: var(--ink2); margin: 0 0 26px; }
.bt-form { display: grid; gap: 18px; }
.bt-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.bt-form label { display: grid; gap: 6px; align-content: start; }
.bt-form label > span { font-weight: 600; font-size: 15px; }
.bt-form label > span em { font-weight: 400; color: var(--mute); font-style: normal; }
.bt-form small { color: var(--mute); font-size: 13px; line-height: 1.4; }
.bt-form input:not([type=checkbox]), .bt-form select, .bt-form textarea { width: 100%; font: 16px var(--sans); color: var(--ink); background: #fff; border: 1.5px solid var(--line); border-radius: 12px; padding: 11px 13px; outline: none; }
.bt-form textarea { resize: vertical; min-height: 120px; line-height: 1.5; }
.bt-form input:focus, .bt-form select:focus, .bt-form textarea:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(255, 74, 28, .18); }
.bt-form .bad input, .bt-form .bad select, .bt-form .bad textarea { border-color: var(--red); }
.bt-check { grid-template-columns: auto 1fr; display: grid; gap: 12px !important; align-items: start; font-size: 15px; color: var(--ink2); cursor: pointer; }
.bt-check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--ink); }
.bt-check.bad span { color: var(--red); }
.bt-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.bt-submit { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.bt-err { margin: 0; color: #b42318; font-weight: 600; }
.bt-done { text-align: center; padding: 30px 0 10px; }
.bt-done h2 { font-size: 44px; margin: 0 0 8px; }
.bt-done > p { color: var(--ink2); font-size: 18px; margin: 0 0 24px; }

.bt-faq { margin-top: 80px; }
.bt-faq h2 { font: 600 40px var(--serif); letter-spacing: -0.03em; margin: 0 0 22px; }
.bt-faq dl { margin: 0; display: grid; gap: 0; border-top: 1.5px solid var(--ink); }
.bt-faq dl > div { padding: 18px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1.6fr; gap: 24px; }
.bt-faq dt { font: 600 19px var(--serif); }
.bt-faq dd { margin: 0; color: var(--ink2); }

@media (max-width: 760px) {
  .bt { padding-top: 56px; }
  .bt-two, .bt-row, .bt-faq dl > div { grid-template-columns: 1fr; }
  .bt-faq dl > div { gap: 6px; }
  .nav .links { display: none; }
}
.inv-form { max-width: 420px; margin: 0 auto; text-align: left; flex-basis: 100%; }
.inv-form .btn { justify-content: center; }
.inv-form .note { position: static; transform: none; text-align: center; margin: 4px 0 0; font: 15px var(--sans); color: var(--mute); }