/* Public start page (body.lp): calm, large images, clear type, plenty of space.
   Palette as base.css / teacher.css; no blur effects, no decorative gradients beyond the image shade. */
body.lp { background: #0d1119; --lp-ink: #eef2f8; --lp-text: #c4cddb; --lp-soft: #93a0b5; --lp-line: rgba(148, 168, 200, .16); }
body.lp main { max-width: none; min-height: 0; margin: 0; padding: 0; }
body.lp .site-footer { max-width: 1240px; margin: 0 auto; padding: 26px 40px 34px; border-top: 1px solid var(--lp-line); color: var(--lp-soft); font-size: 12px; flex-wrap: wrap; }
body.lp .notice { max-width: 1160px; margin: 18px auto 0; }

/* hero ---------------------------------------------------------------------------------- */
.lp-hero { position: relative; isolation: isolate; overflow: hidden; min-height: min(84vh, 820px); display: flex; align-items: flex-end; }
.lp-hero-img { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; object-position: 60% 55%; }
.lp-hero::before { content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(90deg, rgba(10, 13, 20, .9) 0%, rgba(10, 13, 20, .72) 34%, rgba(10, 13, 20, .18) 70%, rgba(10, 13, 20, .05) 100%),
              linear-gradient(0deg, #0d1119 0%, rgba(13, 17, 25, 0) 32%); }
.lp-hero-inner { width: 100%; max-width: 1240px; margin: 0 auto; padding: 120px 40px 72px; display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 56px; align-items: end; }
.lp-hero-text { max-width: 640px; padding-bottom: 8px; animation: lp-rise .7s ease-out both; }
.lp-hero .eyebrow { font: 600 11.5px var(--mono); letter-spacing: .16em; color: #7fdbe4; margin: 0 0 18px; }
.lp-hero h1 { font-size: 52px; line-height: 1.08; letter-spacing: -.025em; font-weight: 620; color: var(--lp-ink); margin: 0 0 22px; max-width: 640px; text-wrap: balance; }
.lp-subline { font-size: 18px; line-height: 1.6; color: #d3dae5; margin: 0; max-width: 560px; }

/* sign-in card ----------------------------------------------------------------------------- */
.lp-login { background: #111723; border: 1px solid rgba(148, 168, 200, .24); border-radius: 14px; padding: 28px 28px 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .38); animation: lp-rise .7s .12s ease-out both; }
.lp-login .eyebrow { font: 600 11px var(--mono); letter-spacing: .14em; color: var(--cyan); }
.lp-login h2 { font-size: 21px; line-height: 1.25; letter-spacing: -.01em; font-weight: 640; color: var(--lp-ink); margin: 8px 0 6px; }
.lp-login-lead { color: var(--lp-text); font-size: 14px; margin: 0 0 18px; }
.lp-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.lp-field label { font-size: 13px; font-weight: 600; color: var(--lp-ink); }
.lp-field input { height: 44px; padding: 0 12px; border-radius: 9px; border: 1px solid rgba(148, 168, 200, .32); background: #0b0f17; color: var(--lp-ink); font-size: 15px; width: 100%; }
.lp-field input:focus-visible { outline: 2px solid #f3bc69; outline-offset: 1px; border-color: transparent; }
.lp-error { margin: 0 0 14px; padding: 9px 12px; border-radius: 8px; background: rgba(224, 96, 42, .14); border: 1px solid rgba(224, 96, 42, .4); color: #ffc3a6; font-size: 13.5px; }
button.lp-submit { width: 100%; min-height: 46px; border-radius: 9px; background: var(--cyan); border-color: var(--cyan); color: #06202a; font-size: 15px; font-weight: 650; }
button.lp-submit:hover:not(:disabled) { background: #8ee5ed; border-color: #8ee5ed; }
.lp-login-hint { margin: 16px 0 0; color: var(--lp-soft); font-size: 12.5px; line-height: 1.55; }

/* content sections ------------------------------------------------------------------------- */
.lp-body { max-width: 1240px; margin: 0 auto; padding: 0 40px; }
.lp-section { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr); gap: 72px; align-items: center; padding: 96px 0; }
.lp-section + .lp-section { border-top: 1px solid var(--lp-line); }
.lp-section.flip .lp-figure { order: 2; }
.lp-figure { margin: 0; }
.lp-figure img { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 14px; background: #151b27; }
.lp-copy { max-width: 560px; }
.lp-copy h2 { font-size: 34px; line-height: 1.15; letter-spacing: -.02em; font-weight: 620; color: var(--lp-ink); margin: 0 0 22px; }
.lp-copy p { font-size: 16.5px; line-height: 1.7; color: var(--lp-text); margin: 0 0 16px; }
.lp-copy p.lp-intro { color: var(--lp-ink); margin-bottom: 20px; }
.lp-steps { list-style: none; margin: 0; padding: 0; }
.lp-steps li { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 4px 12px; padding: 14px 0; border-top: 1px solid var(--lp-line); }
.lp-steps li:last-child { border-bottom: 1px solid var(--lp-line); }
.lp-step-no { font: 600 13px var(--mono); color: #f08d62; padding-top: 2px; letter-spacing: .04em; }
.lp-steps h3 { font-size: 16px; font-weight: 640; color: var(--lp-ink); margin: 0 0 3px; }
.lp-steps p { font-size: 15px; line-height: 1.6; margin: 0; }
.lp-facts { list-style: none; margin: 0; padding: 0; }
.lp-facts li { position: relative; padding: 0 0 0 22px; margin: 0 0 14px; font-size: 15.5px; line-height: 1.65; color: var(--lp-text); }
.lp-facts li::before { content: ""; position: absolute; left: 0; top: .78em; width: 10px; height: 2px; background: var(--cyan); }
.lp-roles { margin: 0; }
.lp-roles > div { padding: 14px 0; border-top: 1px solid var(--lp-line); }
.lp-roles > div:last-child { border-bottom: 1px solid var(--lp-line); }
.lp-roles dt { font-size: 16px; font-weight: 640; color: var(--lp-ink); margin-bottom: 3px; }
.lp-roles dd { margin: 0; font-size: 15px; line-height: 1.6; color: var(--lp-text); }

/* header on the start page ------------------------------------------------------------------- */
button.mc-signin { margin-left: auto; min-height: 36px; padding: 6px 16px; border-radius: 9px; background: transparent; border: 1px solid rgba(95, 208, 220, .55); color: #a3e8ef; font-weight: 600; font-size: 13.5px; }
button.mc-signin:hover:not(:disabled) { background: rgba(95, 208, 220, .1); border-color: var(--cyan); }

@keyframes lp-rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .lp-hero-text, .lp-login { animation: none; } }

@media (max-width: 1080px) {
  .lp-hero-inner { grid-template-columns: minmax(0, 1fr) 340px; gap: 36px; padding: 96px 32px 56px; }
  .lp-hero h1 { font-size: 46px; }
  .lp-section { gap: 48px; padding: 80px 0; }
  .lp-body { padding: 0 32px; }
}
@media (max-width: 860px) {
  .lp-hero { min-height: 0; display: block; }
  .lp-hero::before { background: linear-gradient(180deg, rgba(10, 13, 20, .35) 0%, rgba(10, 13, 20, .78) 46%, #0d1119 78%); }
  .lp-hero-img { height: 70%; }
  .lp-hero-inner { grid-template-columns: 1fr; gap: 28px; padding: 150px 24px 40px; }
  .lp-hero h1 { font-size: 38px; }
  .lp-subline { font-size: 16.5px; }
  .lp-login { max-width: 460px; }
  .lp-section, .lp-section.flip { grid-template-columns: 1fr; gap: 28px; padding: 56px 0; }
  .lp-section.flip .lp-figure { order: 0; }
  .lp-copy { max-width: none; }
  .lp-copy h2 { font-size: 28px; margin-bottom: 16px; }
  .lp-body { padding: 0 24px; }
  body.lp .site-footer { padding: 22px 24px 30px; }
}
@media (max-width: 480px) {
  .lp-hero-inner { padding: 120px 16px 32px; }
  .lp-hero h1 { font-size: 32px; }
  .lp-login { padding: 22px 18px 18px; }
  .lp-body { padding: 0 16px; }
  .lp-copy p, .lp-facts li { font-size: 15.5px; }
  body.lp .site-footer { padding: 20px 16px 28px; }
}