:root {
  --ink: #17233d;
  --ink-soft: #36415a;
  --paper: #f6f0e3;
  --paper-light: #fffdf8;
  --rule: rgba(23, 35, 61, 0.16);
  --gold: #d8a637;
  --rust: #a7462f;
  --teal: #247e82;
  --shadow: 0 22px 60px rgba(23, 35, 61, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 4%, rgba(216, 166, 55, 0.16), transparent 25rem),
    linear-gradient(180deg, #fbf8f0 0%, var(--paper) 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(23, 35, 61, 0.025) 1px, transparent 1px);
  background-size: 100% 28px;
  content: "";
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.65rem 0.9rem;
  color: white;
  background: var(--ink);
  border-radius: 0.35rem;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.page-shell {
  width: min(1120px, calc(100% - 2rem));
  min-height: 100vh;
  margin: 0 auto;
  padding: 1.5rem 0 2rem;
}

.site-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--rule);
}

.student-session { margin-left:auto; text-align:right; }
.student-session form,.student-session div { display:flex;gap:.45rem;align-items:center;justify-content:flex-end; }
.student-session [hidden] { display:none!important; }
.student-session input { width:11.5rem;padding:.55rem .65rem;border:1px solid var(--rule);border-radius:.35rem;font:inherit; }
.student-session button { padding:.55rem .75rem;border:0;border-radius:.35rem;background:var(--ink);color:#fff;font-weight:700;cursor:pointer; }
.student-session p { min-height:1.2em;margin:.25rem 0 0;color:var(--rust);font-size:.78rem; }
#studentName { font-weight:750; }
.access-pending .activity-card { pointer-events:none; }

.brand-mark {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  color: var(--paper-light);
  background: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: inset 0 0 0 3px var(--paper-light);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.55rem;
  font-weight: 700;
}

.eyebrow,
.section-label,
.card-kicker {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--rust);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.05;
}

h1 {
  margin-top: 0.14rem;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(20rem, 1.1fr) minmax(22rem, 0.9fr);
  gap: clamp(1.75rem, 5vw, 4.25rem);
  align-items: center;
  padding: clamp(2rem, 5vw, 3.25rem) 0 clamp(1.75rem, 4vw, 2.6rem);
}

.welcome {
  max-width: 710px;
}

.section-label {
  margin-bottom: 0.65rem;
  color: var(--teal);
}

.welcome h2 {
  max-width: 680px;
  font-size: clamp(2.35rem, 7vw, 4.8rem);
  letter-spacing: -0.035em;
}

.welcome > p:last-child {
  max-width: 600px;
  margin: 1rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 2vw, 1.16rem);
}

.school-opening {
  width: min(100%, 450px);
  margin: 0 0 0 auto;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--paper-light);
  border: 1px solid var(--rule);
  box-shadow: 0 12px 28px rgba(23, 35, 61, 0.1);
}

.school-opening img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.activity-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 3vw, 1.75rem);
  max-width: 900px;
  margin: 0 auto;
}

.activity-card {
  display: grid;
  min-height: 430px;
  overflow: hidden;
  color: inherit;
  background: var(--paper-light);
  border: 1px solid var(--rule);
  box-shadow: 0 9px 25px rgba(23, 35, 61, 0.08);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.activity-card:hover {
  border-color: rgba(23, 35, 61, 0.38);
  box-shadow: var(--shadow);
  transform: translateY(-5px);
}

.activity-card:focus-visible {
  outline: 4px solid var(--gold);
  outline-offset: 4px;
}

.card-art {
  position: relative;
  min-height: 180px;
  overflow: hidden;
  color: #fff8e9;
  background: var(--rust);
}

.card-art::after {
  position: absolute;
  inset: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
  content: "";
}

.card-number {
  position: absolute;
  bottom: -0.15em;
  left: 1.8rem;
  z-index: 1;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(5.5rem, 15vw, 8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.08em;
}

.document-line {
  position: absolute;
  right: 2rem;
  z-index: 1;
  height: 3px;
  background: rgba(255, 248, 233, 0.72);
}

.document-line--one {
  top: 3rem;
  width: 26%;
}

.document-line--two {
  top: 4.2rem;
  width: 34%;
}

.document-line--three {
  top: 5.4rem;
  width: 20%;
}

.card-art--colonies,
.card-art--maps {
  color: #ecf9f6;
  background: #1d5f66;
}

.card-art--midwest {
  color: #fff8e9;
  background: #3e4f78;
}

.activity-card--midwest .card-kicker {
  color: #52689b;
}

.activity-card--maps .card-kicker {
  color: var(--teal);
}

.activity-card--maps .card-number {
  font-size: clamp(4.3rem, 11vw, 6.8rem);
}

.card-art--rpg {
  color: #f8b800;
  background: #0c0c10;
}

.card-art--rpg .card-number {
  font-family: "Courier New", ui-monospace, monospace;
  letter-spacing: 0;
  text-shadow: 6px 6px 0 #d82800;
}

.pixel-flag {
  position: absolute;
  top: 2.4rem;
  right: 2.6rem;
  z-index: 1;
  width: 72px;
  height: 48px;
  background:
    linear-gradient(#0058f8, #0058f8) 0 0 / 30px 24px no-repeat,
    repeating-linear-gradient(#d82800 0 8px, #fcfcfc 8px 16px);
  box-shadow: 0 0 0 4px #000;
}

.activity-card--rpg .card-kicker {
  color: #a7462f;
}

.lock-badge {
  position: absolute;
  top: 2.25rem;
  right: 2.25rem;
  z-index: 2;
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  background: rgba(23, 35, 61, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 50%;
  font-size: 1.2rem;
}

.activity-card:not(.is-locked) .lock-badge,
.access-pending .lock-badge {
  display: none;
}

.activity-card.is-locked {
  cursor: not-allowed;
  filter: saturate(0.55);
  opacity: 0.78;
}

.activity-card.is-locked:hover {
  border-color: var(--rule);
  box-shadow: 0 9px 25px rgba(23, 35, 61, 0.08);
  transform: none;
}

@media (max-width:700px){
  .site-header{align-items:flex-start;flex-wrap:wrap}
  .student-session{width:100%;text-align:left}
  .student-session form,.student-session div{justify-content:flex-start}
}

.map-dot {
  position: absolute;
  z-index: 2;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--gold);
  border: 2px solid #ecf9f6;
  border-radius: 50%;
}

.map-dot--one {
  top: 2.5rem;
  right: 3.2rem;
}

.map-dot--two {
  top: 5.2rem;
  right: 6.7rem;
}

.map-dot--three {
  top: 7rem;
  right: 2.6rem;
}

.map-route {
  position: absolute;
  top: 3.2rem;
  right: 3.3rem;
  z-index: 1;
  width: 4.4rem;
  height: 4rem;
  border-bottom: 2px dashed rgba(236, 249, 246, 0.65);
  border-left: 2px dashed rgba(236, 249, 246, 0.65);
  transform: rotate(-17deg);
}

.card-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(1.35rem, 4vw, 2rem);
}

.card-kicker {
  margin-bottom: 0.65rem;
  color: var(--rust);
}

.activity-card--colonies .card-kicker {
  color: var(--teal);
}

.card-body h3 {
  font-size: clamp(1.85rem, 4vw, 2.65rem);
}

.card-body > p:not(.card-kicker) {
  max-width: 36rem;
  margin: 0.85rem 0 1.5rem;
  color: var(--ink-soft);
}

.card-action {
  margin-top: auto;
  padding-bottom: 0.18rem;
  border-bottom: 2px solid currentColor;
  font-weight: 800;
}

.card-action span {
  display: inline-block;
  margin-left: 0.25rem;
  transition: transform 180ms ease;
}

.activity-card:hover .card-action span {
  transform: translateX(4px);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-top: 1.2rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  font-size: 0.87rem;
}

footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 1.25rem, 38rem);
    padding-top: 0.75rem;
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 1.7rem;
    padding-top: 2.2rem;
  }

  .school-opening {
    width: min(100%, 34rem);
    margin: 0 auto;
  }

  .welcome h2 {
    font-size: clamp(2.35rem, 15vw, 4rem);
  }

  .activity-grid {
    grid-template-columns: 1fr;
  }

  .activity-card {
    min-height: 390px;
  }

  footer {
    flex-direction: column;
  }
}

@media (min-width: 721px) and (max-width: 980px) {
  .intro-grid {
    grid-template-columns: minmax(16rem, 1fr) minmax(22rem, 1fr);
    gap: 1.5rem;
  }

  .welcome h2 {
    font-size: clamp(2.6rem, 6vw, 3.75rem);
  }

  .activity-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

.card-art--kamazon { background: #172839; display:flex; align-items:center; justify-content:center; }
.kamazon-mark { font: 700 clamp(2rem, 5vw, 3.5rem)/1.2 Arial, sans-serif; letter-spacing:-.055em; color:white; }
.kamazon-mark small { font-size:.45em; letter-spacing:0; }
.kamazon-mark > span { color:#ffbd43; }
.card-art--chess{background:conic-gradient(#3557ff 25%,#00157c 0 50%,#3557ff 0 75%,#00157c 0);background-size:70px 70px;display:grid;place-items:center}
.chess-mark{font-size:96px;line-height:1;color:#f6c752;text-align:center;text-shadow:0 4px 0 #00104a}.chess-mark small{display:block;font:800 12px/2 Arial,sans-serif;letter-spacing:3px;color:white;text-shadow:none}