:root {
  --ink: #0f172a;
  --soft: #475569;
  --paper: #fff7ed;
  --card: #ffffff;
  --hot: #ea580c;
  --line: #fed7aa;
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(900px 400px at -10% -20%, #fdba74 0%, transparent 50%),
    radial-gradient(700px 380px at 110% 0%, #93c5fd 0%, transparent 46%),
    var(--paper);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100vh;
  padding-bottom: 96px;
}

.top {
  background: linear-gradient(135deg, #1e3a8a 0%, #0369a1 55%, #0ea5e9 100%);
  color: #fff;
  padding: 1.25rem 1.1rem 1rem;
  box-shadow: 0 8px 24px rgba(30, 58, 138, .28);
}
.kicker {
  margin: 0 0 .2rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: .72rem;
  opacity: .85;
  font-weight: 700;
}
.top h1 { margin: 0 0 .3rem; font-size: 1.55rem; letter-spacing: -.03em; }
.sub { margin: 0 0 .9rem; color: #dbeafe; font-size: .95rem; }

.progress-wrap { margin-bottom: .7rem; }
.progress-label { font-size: .8rem; font-weight: 700; margin-bottom: .35rem; }
.bar {
  height: 10px;
  background: rgba(255,255,255,.22);
  border-radius: 999px;
  overflow: hidden;
}
.bar span {
  display: block;
  height: 100%;
  width: 12.5%;
  background: linear-gradient(90deg, #fbbf24, #fb7185);
  border-radius: 999px;
  transition: width .25s ease;
}

.dots { display: flex; gap: .4rem; flex-wrap: wrap; }
.dots button {
  width: 28px; height: 28px;
  border: 0; border-radius: 999px;
  background: rgba(255,255,255,.22);
  color: #fff; font-weight: 800; font-size: .75rem;
  cursor: pointer;
}
.dots button.on { background: #fbbf24; color: #0f172a; }
.dots button.done { background: #86efac; color: #14532d; }

main { max-width: 760px; margin: 0 auto; padding: 1.1rem; }
.step { display: none; }
.step.on { display: block; animation: in .25s ease; }
@keyframes in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.badge {
  display: inline-block;
  background: #dbeafe; color: #1e3a8a;
  font-weight: 800; font-size: .78rem;
  letter-spacing: .04em; text-transform: uppercase;
  padding: .28rem .65rem; border-radius: 999px;
  margin: 0 0 .5rem;
}
.badge.pink { background: #ffe4e6; color: #9f1239; }
.badge.gold { background: #fef3c7; color: #92400e; }
.hot-badge { background: #ffedd5; color: #c2410c; }
.teal-badge { background: #ccfbf1; color: #115e59; }

h2 { margin: 0 0 .55rem; font-size: 1.35rem; letter-spacing: -.02em; }
h3 { margin: 0 0 .4rem; font-size: 1.05rem; }
p { margin: .45rem 0 .7rem; }

.do-now {
  background: #fff7ed;
  border: 3px solid #f97316;
  border-radius: 16px;
  padding: 1rem 1.05rem;
  margin: .8rem 0 1rem;
  font-size: 1.05rem;
}
.do-now b {
  display: block;
  color: #c2410c;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .78rem;
  margin-bottom: .35rem;
}

.trap, .tip, .big {
  border-radius: 14px;
  padding: .9rem 1rem;
  margin: 1rem 0;
}
.trap { background: #fff1f2; border: 1px solid #fecdd3; }
.trap b, .tip b, .big b { display: block; margin-bottom: .25rem; }
.trap b { color: #be123c; }
.tip { background: #fef3c7; border: 1px solid #fcd34d; }
.tip b { color: #92400e; }
.big { background: #e0f2fe; border: 1px solid #7dd3fc; }

.pair { display: grid; gap: .7rem; }
@media (min-width: 640px) { .pair { grid-template-columns: 1fr 1fr; } }
.flash { border-radius: 16px; padding: 1rem; color: #fff; }
.flash.lat { background: linear-gradient(160deg, #f43f5e, #fb7185); }
.flash.lon { background: linear-gradient(160deg, #6d28d9, #a78bfa); }

.moves { list-style: none; padding: 0; margin: .4rem 0 1rem; }
.moves li { display: flex; gap: .65rem; align-items: flex-start; margin: .45rem 0; }
.moves .n {
  flex: 0 0 28px; height: 28px; border-radius: 999px;
  background: var(--ink); color: #fff; font-weight: 800; font-size: .85rem;
  display: grid; place-items: center;
}

.map-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: .7rem;
  margin: .8rem 0;
}
.realmap { position: relative; max-width: 420px; margin: 0 auto; }
.realmap img { width: 100%; height: auto; display: block; background: #fff; }
.dot {
  position: absolute;
  width: 22px; height: 22px;
  margin: -11px 0 0 -11px;
  border-radius: 50%;
  background: #dc2626;
  color: #fff;
  font-size: .72rem;
  font-weight: 800;
  display: grid;
  place-items: center;
  box-shadow: 0 0 0 3px #fff, 0 2px 6px rgba(0,0,0,.35);
}

.coord-list, .quiz-rows, .city-grid { display: grid; gap: .55rem; margin: .8rem 0; }
.coord, .city {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: .75rem .85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .6rem;
}
.coord .where, .city .where { color: var(--soft); font-size: .85rem; font-weight: 600; }
.btn.tiny { padding: .4rem .7rem; font-size: .8rem; }

.qrow {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: .8rem;
}
.qrow .choices { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .5rem; }
.choices button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: .35rem .7rem;
  font-weight: 700;
  cursor: pointer;
  font-size: .85rem;
}
.choices button.right { background: #dcfce7; border-color: #86efac; color: #166534; }
.choices button.wrong { background: #ffe4e6; border-color: #fda4af; color: #9f1239; }
.feedback { margin: .45rem 0 0; font-size: .9rem; font-weight: 600; min-height: 1.2em; }

.template {
  background: #fff;
  border: 2px dashed #fdba74;
  border-radius: 16px;
  padding: .9rem 1rem;
  margin: 1rem 0;
}
.template-label {
  margin: 0 0 .4rem;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--hot);
}
blockquote { margin: 0; font-size: .98rem; line-height: 1.6; }

.checklist { display: grid; gap: .45rem; margin: 1rem 0; }
.checklist label {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: .7rem .8rem;
  display: flex; gap: .55rem; align-items: flex-start;
  font-weight: 600;
}
.checklist input { margin-top: .2rem; width: 1.1rem; height: 1.1rem; }

.hint { color: var(--soft); font-size: .9rem; }
.row { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .7rem; }

.btn {
  border: 0;
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: .7rem 1.1rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 2px 0 rgba(15, 23, 42, .08);
}
.btn.ghost { background: #ffedd5; color: #9a3412; }
.btn.primary {
  background: linear-gradient(90deg, #f97316, #ef4444);
  color: #fff;
}
.btn:disabled { opacity: .4; cursor: not-allowed; }

.paper { margin: 1.25rem 0 0; }
.paper-tag {
  display: inline-block;
  background: #fb7185;
  color: #fff;
  font-weight: 800;
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: .28rem .7rem;
  border-radius: 999px 999px 12px 0;
  margin: 0 0 .45rem .4rem;
}
.apex {
  background: #fff;
  color: #111;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 14px 14px 18px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, .14);
  font-size: .92rem;
}
.apex-head {
  display: flex;
  justify-content: space-between;
  gap: .6rem;
  border-bottom: 2px solid #111;
  padding-bottom: .45rem;
  margin-bottom: .7rem;
  font-family: Arial, Helvetica, sans-serif;
}
.apex-head h3 { margin: 0; font-size: 1.02rem; }
.apex-head .course { font-style: italic; font-size: .82rem; color: #334155; }
.apex-head .right { text-align: right; font-size: .82rem; }
.apex .q { font-weight: 700; margin: .7rem 0 .35rem; font-size: .88rem; }
.apex .note {
  background: #f8fafc;
  border-left: 3px solid #64748b;
  padding: .4rem .6rem;
  font-size: .82rem;
  margin: .4rem 0 .7rem;
}
.chart {
  border: 1px solid #334155;
  margin: .35rem 0 .7rem;
  font-size: .82rem;
}
.chart .head, .chart .row {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
}
.chart.two .head, .chart.two .row { grid-template-columns: 1.2fr 1fr; }
.chart .head { background: #d1fae5; font-weight: 800; }
.chart span { padding: .32rem .45rem; border: 1px solid #94a3b8; }
.hw {
  font-family: "Patrick Hand", "Segoe Print", "Comic Sans MS", cursive;
  color: #1d4ed8;
  font-size: 1.15rem;
}
.blank { color: transparent; border-bottom: 1px solid #94a3b8; display: inline-block; min-width: 6rem; }
.fresh { background: #fef08a; }
.write {
  min-height: 4rem;
  border-bottom: 1px dotted #94a3b8;
  margin: .3rem 0 .8rem;
  padding: .2rem 0;
}
.paper figcaption {
  margin: .55rem 4px 0;
  font-size: .88rem;
  color: var(--soft);
  font-weight: 600;
}

.nav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  gap: .6rem;
  justify-content: space-between;
  padding: .75rem 1rem calc(.75rem + env(safe-area-inset-bottom));
  background: rgba(255, 247, 237, .92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--line);
}
.nav .btn { min-width: 44%; }