/* ============================================================
   COLOURS AND LOOKS
   Change a colour here and it changes everywhere on the website!
   ============================================================ */
:root {
  --moss: #5b7a3a;          /* mossy green */
  --moss-dark: #3d5a27;
  --moss-light: #e8f0dc;
  --russian-blue: #4e6e9e;  /* Russian blue */
  --russian-blue-dark: #2c3e63;
  --torch: #ffc845;         /* torchlight yellow */
  --crystal: #9b6bd6;       /* crystal purple */
  --ink: #1f2a1a;
  --paper: #fbfaf4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Nunito', system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink);
  background: var(--moss-light);
}

h1, h2, .logo, .card-title, .number, .challenge-title {
  font-family: 'Baloo 2', 'Nunito', sans-serif;
  line-height: 1.1;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 16px;
  background: var(--russian-blue-dark);
  padding: 8px 16px;
}
.logo { color: var(--torch); font-size: 1.5rem; font-weight: 800; text-decoration: none; }
.nav { display: flex; align-items: center; gap: 6px; }
.nav a, .sound-toggle {
  padding: 4px 12px;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
  background: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.nav a.current { border-color: var(--torch); color: var(--torch); }
.nav a:hover, .sound-toggle:hover { background: rgba(255, 255, 255, .12); }

main { max-width: 1140px; margin: 0 auto; padding: 0 16px 40px; }

/* ---------- Home page ---------- */
.hero {
  margin: 0 -16px;
  padding: 56px 16px 72px;
  text-align: center;
  color: #fff;
  background:
    radial-gradient(circle at 15% 30%, #8ff5e655 0 3px, transparent 4px),
    radial-gradient(circle at 70% 20%, #8ff5e655 0 2px, transparent 3px),
    radial-gradient(circle at 85% 55%, #8ff5e655 0 3px, transparent 4px),
    radial-gradient(circle at 35% 65%, #8ff5e644 0 2px, transparent 3px),
    linear-gradient(180deg, var(--russian-blue-dark), var(--russian-blue));
  clip-path: polygon(0 0, 100% 0, 100% 88%, 90% 100%, 80% 90%, 68% 100%, 55% 91%, 42% 100%, 30% 90%, 18% 100%, 8% 91%, 0 100%);
}
.hero h1 {
  margin: 4px 0 12px;
  font-size: clamp(3rem, 10vw, 5.5rem);
  font-weight: 800;
  color: var(--torch);
  text-shadow: 0 4px 0 var(--russian-blue-dark);
}
.hero-kicker { margin: 0; font-weight: 700; font-size: 1.2rem; }
.hero-text { max-width: 560px; margin: 0 auto; font-size: 1.2rem; }

.section-title { font-size: 2rem; color: var(--moss-dark); margin: 32px 0 16px; }

.cave-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.cave-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border-radius: 22px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  border: 4px solid #fff;
  box-shadow: 0 6px 0 var(--moss);
  transition: transform .15s, box-shadow .15s;
}
.cave-card:hover, .cave-card:focus-visible {
  transform: translateY(-4px) rotate(-.5deg);
  box-shadow: 0 10px 0 var(--russian-blue);
  outline: none;
}
.thumb { display: block; width: 100%; aspect-ratio: 5 / 3; height: auto; background: var(--russian-blue); }
.card-body { display: flex; flex-direction: column; gap: 4px; padding: 12px 16px 18px; }
.card-title { font-size: 1.4rem; font-weight: 800; color: var(--russian-blue-dark); }
.where { color: var(--moss-dark); font-weight: 700; margin: 0; }
.hook { font-size: 1rem; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; }
.badge {
  margin-top: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--torch);
  font-weight: 700;
  font-size: .9rem;
}
.quiz-badge { background: #e7dcf7; }
.number {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--torch);
  color: var(--ink);
  font-size: 1.6rem;
  font-weight: 800;
  border: 3px solid #fff;
}

.quiz-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding: 18px 22px;
  border-radius: 22px;
  background: var(--crystal);
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  box-shadow: 0 6px 0 #6f45a8;
}
.quiz-banner strong { font-family: 'Baloo 2', sans-serif; font-size: 1.6rem; }
.quiz-banner-icon { font-size: 3rem; }
.quiz-banner .btn { margin-left: auto; flex: none; }

/* ---------- Cave page ---------- */
.back { display: inline-block; margin: 16px 0 8px; color: var(--russian-blue-dark); font-weight: 700; }
.cave-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.cave-head h1 { margin: 0; font-size: clamp(1.9rem, 5vw, 3rem); color: var(--russian-blue-dark); }
.number.big { position: static; flex: none; width: 60px; height: 60px; font-size: 2.1rem; }

/* Keep the cave window small enough to fit on the screen */
.explorer { max-width: max(320px, calc((100vh - 300px) * 5 / 3)); margin: 0 auto; }

.hud {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 16px;
  padding: 8px 14px;
  border-radius: 14px 14px 0 0;
  background: var(--russian-blue-dark);
  color: #fff;
}
.counter strong { color: var(--torch); }

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 3;
  overflow: hidden;
  border-radius: 0 0 22px 22px;
  background: #050608;
  border: 5px solid var(--russian-blue-dark);
  border-top-width: 0;
}
#view { display: block; width: 100%; height: 100%; cursor: crosshair; touch-action: none; outline: none; }
#view:focus-visible { box-shadow: inset 0 0 0 4px var(--torch); }

.banner {
  position: absolute;
  left: 50%;
  top: 12%;
  transform: translateX(-50%);
  padding: 6px 22px;
  border-radius: 999px;
  background: rgba(10, 14, 24, .7);
  color: var(--torch);
  font: 800 clamp(1.1rem, 3vw, 2rem) 'Baloo 2', sans-serif;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
}
.banner.show { animation: banner 3.2s ease-out; }
@keyframes banner { 0% { opacity: 0; transform: translate(-50%, -10px); } 15%, 75% { opacity: 1; transform: translate(-50%, 0); } 100% { opacity: 0; } }

.note, .help {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  max-width: 90%;
  padding: 8px 16px;
  border-radius: 14px;
  background: rgba(10, 14, 24, .72);
  color: #fff;
  text-align: center;
  font-weight: 700;
  font-size: clamp(.8rem, 2vw, 1.05rem);
  pointer-events: none;
}
.note { bottom: 6%; }
.help { bottom: 8%; }
.note[hidden], .help[hidden] { display: none; }

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
}
.walk-buttons { display: flex; gap: 8px; }
.btn.walk { user-select: none; -webkit-user-select: none; touch-action: none; min-width: 56px; }
.btn.walk.forward { padding-left: 28px; padding-right: 28px; font-size: 1.35rem; }
.btn.look { background: var(--torch); color: var(--ink); border-color: #b8860b; box-shadow: 0 4px 0 #b8860b; animation: wiggle 1s ease-in-out infinite; }
.btn.look[hidden] { display: none; }

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: 3px solid var(--moss-dark);
  border-radius: 999px;
  background: var(--moss);
  color: #fff;
  font: 800 1.15rem 'Baloo 2', sans-serif;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--moss-dark);
}
.btn:hover { background: #6a8c45; }
.btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--moss-dark); }
.btn.ghost { background: #fff; color: var(--moss-dark); }

.learn {
  margin-top: 28px;
  padding: 20px 24px;
  border-radius: 22px;
  background: #fff;
  border-left: 10px solid var(--crystal);
}
.learn h2 { margin: 0 0 8px; color: var(--crystal); font-size: 1.8rem; }
.learn li { margin-bottom: 8px; }

/* ---------- Quiz ---------- */
.quiz-hero { text-align: center; padding: 28px 0 8px; }
.quiz-hero h1 { margin: 0; font-size: clamp(2.6rem, 8vw, 4rem); color: var(--crystal); }
.big-challenge {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 22px 26px;
  border-radius: 22px;
  background: var(--russian-blue);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 6px 0 var(--russian-blue-dark);
}
.challenge-title { font-size: 2rem; font-weight: 800; color: var(--torch); }
.quiz-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.quiz-list a {
  display: flex;
  flex-direction: column;
  padding: 14px 18px;
  border-radius: 18px;
  background: #fff;
  color: var(--russian-blue-dark);
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 4px 0 var(--moss);
}
.stars { font-size: 1.1rem; letter-spacing: 2px; }
.stars.muted { font-size: .9rem; color: #5f6a56; letter-spacing: 0; font-weight: 400; }
.big-challenge .stars.muted { color: #e3e9f3; }
.star-empty { filter: grayscale(1); opacity: .35; }

.quiz-card {
  max-width: 720px;
  margin: 8px auto 0;
  padding: 24px clamp(16px, 4vw, 36px) 28px;
  border-radius: 26px;
  background: #fff;
  box-shadow: 0 6px 0 var(--crystal);
}
.quiz-title { margin: 0; color: var(--crystal); font-weight: 700; }
.quiz-cave { margin: 14px 0 0; color: var(--moss-dark); font-weight: 700; }
.quiz-card h2 { margin: 6px 0 18px; font-size: clamp(1.5rem, 4vw, 2.1rem); color: var(--russian-blue-dark); }
.dots { display: flex; gap: 6px; margin-top: 10px; }
.dots span { width: 14px; height: 14px; border-radius: 50%; background: #e3e7dc; }
.dots .done { background: var(--moss); }
.dots .now { background: var(--torch); }
.answers { display: grid; gap: 10px; }
.answer {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border: 3px solid #dfe6d4;
  border-radius: 18px;
  background: var(--paper);
  font: 700 1.15rem 'Nunito', sans-serif;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.answer:hover:not(:disabled) { border-color: var(--russian-blue); }
.letter {
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--russian-blue);
  color: #fff;
  font-family: 'Baloo 2', sans-serif;
}
.answer.right { border-color: #4caf50; background: #e3f6df; }
.answer.right .letter { background: #4caf50; }
.answer.wrong { border-color: #e0533d; background: #fde4df; }
.answer.wrong .letter { background: #e0533d; }
.answer:disabled { cursor: default; }
.feedback { margin-top: 14px; }
.verdict { font-size: 1.3rem; font-weight: 700; margin: 0 0 4px; }
.result { text-align: center; }
.big-stars { font-size: 3.5rem; letter-spacing: 6px; margin-top: 10px; }

/* ---------- Real photos ---------- */
.real-photos { margin-top: 28px; }
.real-photos h2 { margin: 0; color: var(--russian-blue-dark); font-size: 1.8rem; }
.real-photos p { margin: 4px 0 12px; }
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.photo-thumb {
  display: flex;
  flex-direction: column;
  padding: 0;
  border: 4px solid #fff;
  border-radius: 18px;
  overflow: hidden;
  background: #fff;
  font: 700 .95rem 'Nunito', sans-serif;
  color: var(--ink);
  text-align: left;
  cursor: zoom-in;
  box-shadow: 0 5px 0 var(--russian-blue);
  transition: transform .15s;
}
.photo-thumb:hover, .photo-thumb:focus-visible { transform: translateY(-3px) rotate(.5deg); outline: none; }
.photo-thumb img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: block; background: var(--russian-blue-dark); }
.photo-thumb span { padding: 8px 10px 10px; }

.photo-big { margin: 0; }
.photo-big img { display: block; width: 100%; max-height: 70vh; object-fit: contain; border-radius: 14px; background: #10141f; }
.photo-big figcaption, .secret-photo figcaption { margin: 10px 0 12px; font-weight: 700; }
figcaption small { display: block; margin-top: 4px; font-weight: 400; font-size: .8rem; color: #5f6a56; }
figcaption small a { color: inherit; }
.secret-photo { margin: 12px 0 0; }
.photo-open { display: block; width: 100%; padding: 0; border: 0; border-radius: 14px; overflow: hidden; cursor: zoom-in; background: #10141f; }
.photo-open img { display: block; width: 100%; max-height: min(220px, 30vh); object-fit: cover; }

/* ---------- Pop-up ---------- */
#popup { max-width: min(500px, calc(100vw - 32px)); padding: 0; border: none; border-radius: 26px; background: transparent; }
#popup.wide { max-width: min(820px, calc(100vw - 32px)); width: 100%; }
#popup::backdrop { background: rgba(10, 14, 24, .7); }
.popup-card {
  padding: 26px 26px 24px;
  text-align: center;
  background: var(--paper);
  border: 5px solid var(--torch);
  border-radius: 26px;
}
.popup-icon { font-size: 4rem; line-height: 1; animation: pop .4s ease-out; }
.popup-kicker { margin: 8px 0 0; color: var(--crystal); font-weight: 700; text-transform: uppercase; letter-spacing: .05em; font-size: .9rem; }
.popup-card h2 { margin: 4px 0 10px; font-size: 1.9rem; color: var(--russian-blue-dark); }
.popup-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }

.footer { padding: 24px 16px; text-align: center; font-size: .9rem; color: var(--moss-dark); }

@keyframes pop { from { transform: scale(.3); } to { transform: scale(1); } }
@keyframes wiggle { 50% { transform: rotate(-3deg) scale(1.05); } }

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

@media (max-width: 600px) {
  body { font-size: 16px; }
  .controls { justify-content: center; }
  .quiz-banner { flex-wrap: wrap; }
  .quiz-banner .btn { margin-left: 0; }
}