:root {
  --ink: #3a1f0b;
  --muted: #6a4a2c;
  --paper: #fffaf0;
  --cream: #ffe8b4;
  --gold: #ffd75a;
  --red: #d94824;
  --green: #57a546;
  --blue: #2d7f7b;
  --blue-dark: #1d5d58;
  --purple: #7a3f14;
  --check: #e65a1f;
  --check-hover: #a83b12;
  --line: rgba(58, 31, 11, 0.18);
  --shadow: 0 18px 48px rgba(58, 31, 11, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 215, 90, 0.34), transparent 28rem),
    radial-gradient(circle at top right, rgba(87, 165, 70, 0.22), transparent 26rem),
    linear-gradient(180deg, #fffaf0, #fff1c7 58%, #3a1f0b);
}

button,
input {
  font: inherit;
}

h1,
h2,
p {
  margin-top: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.brief {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
}

.teacher-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.teacher-shell {
  width: min(980px, 100%);
}

.teacher-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(255, 250, 240, 0.82), rgba(255, 232, 180, 0.9)),
    url("assets/buildthetaco.png") center / cover;
  box-shadow: var(--shadow);
  padding: clamp(28px, 6vw, 72px);
}

.teacher-card h1,
.hero h1 {
  margin-bottom: 12px;
  font-size: clamp(3rem, 6vw, 6.8rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.teacher-links a,
.lock-card button,
.win-card button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fffdf5;
  background: var(--blue);
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
}

.teacher-links a:hover,
.lock-card button:hover,
.win-card button:hover {
  background: var(--blue-dark);
}

.lock-card button {
  background: var(--check);
}

.lock-card button:hover {
  background: var(--check-hover);
}

.teacher-links {
  display: grid;
  gap: 14px;
  max-width: 560px;
  margin-top: 30px;
}

.teacher-links a {
  min-height: 52px;
  padding: 0 20px;
  justify-self: start;
}

.teacher-links p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.teacher-links span {
  font-weight: 900;
}

.app-shell {
  width: min(1460px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 42px;
}

.hero {
  min-height: 210px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 24px;
  align-items: end;
  padding: 28px 0 18px;
}

.progress-panel {
  border: 1px solid var(--line);
  background: rgba(255, 250, 240, 0.92);
  padding: 18px;
  box-shadow: var(--shadow);
}

.progress-panel span:first-child {
  display: block;
  margin-bottom: 12px;
  font-weight: 900;
}

.progress-track {
  height: 12px;
  overflow: hidden;
  background: #e8cf98;
  border: 1px solid rgba(58, 31, 11, 0.1);
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--red), var(--gold), var(--green), var(--blue), var(--purple));
  transition: width 220ms ease;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 22px;
  align-items: start;
}

.clue-area,
.locks-panel {
  border: 1px solid var(--line);
  background: rgba(255, 250, 240, 0.95);
  box-shadow: var(--shadow);
}

.locks-panel {
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
}

.clue-toolbar,
.locks-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.clue-toolbar h2,
.locks-header h2 {
  margin: 0;
  font-size: 1.15rem;
}

.locks-header {
  display: block;
  position: sticky;
  top: 0;
  z-index: 2;
  background: rgba(255, 250, 240, 0.98);
}

.locks-header p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.ghost-button,
.icon-button {
  min-height: 40px;
  border: 1px solid rgba(17, 43, 84, 0.22);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
}

.ghost-button:hover,
.icon-button:hover {
  border-color: var(--blue);
}

.clue-grid,
.explore-board {
  display: grid;
  gap: 16px;
  padding: 16px;
}

.mission-card {
  margin: 0;
  border: 1px solid var(--line);
  background:
    linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 250, 240, 0.96)),
    radial-gradient(circle at 88% 18%, rgba(230, 90, 31, 0.2), transparent 10rem),
    radial-gradient(circle at 12% 88%, rgba(87, 165, 70, 0.18), transparent 12rem);
  padding: 22px;
}

.mission-card h2 {
  margin-bottom: 12px;
  font-size: clamp(1.5rem, 3vw, 2.35rem);
  line-height: 1.05;
}

.mission-card p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.62;
}

.clue-scene {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 232, 180, 0.82), rgba(255, 250, 240, 0.92)),
    radial-gradient(circle at 18% 18%, rgba(255, 215, 90, 0.24), transparent 9rem),
    radial-gradient(circle at 84% 18%, rgba(87, 165, 70, 0.2), transparent 11rem),
    #ffe8b4;
  padding: 14px;
}

.clue-card-button {
  display: grid;
  justify-items: center;
  gap: 12px;
  min-width: 0;
  border: 1px solid rgba(58, 31, 11, 0.16);
  background: #fff;
  color: var(--ink);
  padding: 16px 12px 14px;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(58, 31, 11, 0.08);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.clue-card-button:hover,
.clue-card-button:focus-visible {
  border-color: rgba(230, 90, 31, 0.68);
  box-shadow: 0 14px 30px rgba(58, 31, 11, 0.16);
  transform: translateY(-2px);
}

.clue-card-button:focus-visible {
  outline: 4px solid rgba(230, 90, 31, 0.24);
  outline-offset: 3px;
}

.clue-thumb-wrap {
  position: relative;
  display: block;
  width: min(100%, 172px);
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid rgba(58, 31, 11, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 232, 180, 0.9)),
    repeating-linear-gradient(45deg, rgba(87, 165, 70, 0.08) 0 10px, rgba(255, 215, 90, 0.16) 10px 20px);
}

.clue-thumb {
  display: block;
  width: 100%;
  height: 100%;
  padding: 12px;
  object-fit: contain;
  background: #fff;
}

.clue-thumb-fallback {
  position: absolute;
  inset: 0;
  display: none;
  align-content: center;
  justify-items: center;
  gap: 9px;
  padding: 18px;
  color: var(--muted);
  text-align: center;
}

.clue-thumb-fallback span {
  color: var(--blue);
  font-weight: 900;
  line-height: 1.12;
}

.clue-thumb-fallback small {
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1.35;
}

.is-missing-image .clue-thumb {
  display: none;
}

.is-missing-image .clue-thumb-fallback {
  display: grid;
}

.clue-card-title {
  min-height: 2.5em;
  color: var(--ink);
  font-weight: 900;
  line-height: 1.25;
}

.link-note {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  color: #112b54;
  background: var(--gold);
  font-size: 0.82rem;
  font-weight: 900;
}

.clue-card {
  margin: 0;
  border: 1px solid var(--line);
  background: #fff;
}

.supply-quiz-card {
  overflow: hidden;
}

.quiz-header {
  border-top: 18px solid #ff9638;
  padding: 18px 20px 14px;
  background: #fffdf7;
}

.quiz-header span {
  display: inline-flex;
  margin: -36px 0 16px;
  min-height: 48px;
  align-items: center;
  padding: 0 18px;
  border-radius: 8px 8px 0 0;
  color: #111111;
  background: #ff9638;
  font-weight: 900;
}

.quiz-header h3 {
  margin: 0 0 12px;
  padding-bottom: 12px;
  border-bottom: 3px solid #8c5a22;
  color: #202124;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
}

.quiz-header p {
  margin: 0;
  color: #202124;
  font-size: 1.1rem;
  font-weight: 700;
}

.quiz-stage {
  padding: 18px 20px 22px;
}

.quiz-question h4 {
  margin: 0 0 14px;
  color: #202124;
  font-size: 1.45rem;
}

.quiz-image {
  display: block;
  width: min(680px, 100%);
  max-height: 460px;
  margin: 0 auto 20px;
  object-fit: contain;
  background: #ffffff;
  cursor: zoom-in;
}

.quiz-question label {
  display: block;
  margin-bottom: 10px;
  color: #202124;
  font-size: 1.05rem;
  font-weight: 900;
}

.quiz-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 92px;
  gap: 10px;
  max-width: 560px;
}

.quiz-row input {
  width: 100%;
  min-height: 44px;
  border: 1px solid rgba(17, 43, 84, 0.22);
  padding: 9px 10px;
  text-transform: uppercase;
}

.quiz-row input:focus {
  outline: 3px solid rgba(29, 111, 209, 0.24);
  border-color: var(--blue);
}

.quiz-row button {
  min-height: 44px;
  border: 0;
  color: #fffdf5;
  background: var(--blue);
  font-weight: 900;
  cursor: pointer;
}

.quiz-row button:hover {
  background: var(--blue-dark);
}

.quiz-feedback {
  min-height: 22px;
  margin: 8px 0 0;
  color: var(--red);
  font-size: 0.92rem;
}

.riddle-card {
  padding: clamp(18px, 4vw, 30px);
  border-left: 8px solid var(--blue);
  background: #ffffff;
}

.riddle-card p {
  margin: 0 0 14px;
  color: #111111;
  font-size: clamp(1.35rem, 4vw, 2rem);
  font-weight: 900;
  line-height: 1.3;
}

.clue-image {
  display: block;
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  background: #eef6ff;
  cursor: zoom-in;
  touch-action: pan-y;
  user-select: none;
}

.clue-image:focus-visible {
  outline: 4px solid rgba(29, 111, 209, 0.34);
  outline-offset: 4px;
}

figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.locks-list {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.lock-card {
  border: 1px solid var(--line);
  background: #fff;
  padding: 14px;
}

.lock-card.solved {
  border-color: rgba(59, 155, 74, 0.65);
  background: #eff9f0;
}

.lock-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.lock-title {
  display: flex;
  align-items: center;
  gap: 9px;
}

.lock-icon-svg {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  overflow: visible;
}

.lock-card.solved .lock-icon-svg {
  animation: lockPop 320ms ease both;
}

.open-lock .lock-shackle {
  animation: shackleOpen 340ms cubic-bezier(0.2, 1.45, 0.38, 1) both;
  transform-origin: 26px 30px;
}

.lock-top h3 {
  margin: 0;
  font-size: 1rem;
}

.lock-card label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.35;
}

.lock-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 82px;
  gap: 8px;
}

.lock-card input {
  width: 100%;
  min-height: 40px;
  border: 1px solid rgba(17, 43, 84, 0.22);
  padding: 9px 10px;
  text-transform: uppercase;
}

.lock-card input:focus {
  outline: 3px solid rgba(29, 111, 209, 0.24);
  border-color: var(--blue);
}

.lock-card button {
  min-height: 40px;
  border: 0;
}

.feedback {
  min-height: 22px;
  margin: 8px 0 0;
  color: var(--red);
  font-size: 0.88rem;
  line-height: 1.35;
}

.solved .feedback {
  color: var(--green);
}

.image-dialog,
.quiz-dialog,
.win-dialog {
  width: min(1180px, calc(100% - 28px));
  border: 0;
  padding: 0;
  background: #fffdf5;
  color: var(--ink);
  box-shadow: 0 24px 80px rgba(20, 20, 20, 0.28);
}

.image-dialog::backdrop,
.quiz-dialog::backdrop,
.win-dialog::backdrop {
  background: rgba(17, 43, 84, 0.5);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.dialog-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.icon-button {
  width: 40px;
  padding: 0;
  font-weight: 900;
}

.image-dialog img {
  display: block;
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
  background: #eef6ff;
}

.win-dialog {
  width: min(720px, calc(100% - 28px));
}

.win-card {
  padding: 28px;
  text-align: center;
}

.win-card h2 {
  margin-bottom: 12px;
  font-size: 2rem;
}

.win-card p:not(.eyebrow) {
  max-width: 520px;
  margin: 0 auto 20px;
  color: var(--muted);
  line-height: 1.55;
}

.win-card button {
  min-height: 42px;
  border: 0;
  padding: 0 18px;
}

.school-celebration {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 20;
}

.taco-confetti {
  position: absolute;
  top: -44px;
  left: var(--x);
  width: 34px;
  height: 22px;
  border: 2px solid #7a3f14;
  border-bottom-width: 4px;
  border-radius: 34px 34px 7px 7px;
  background:
    radial-gradient(circle at 25% 72%, #d94824 0 3px, transparent 4px),
    radial-gradient(circle at 52% 74%, #57a546 0 3px, transparent 4px),
    radial-gradient(circle at 74% 72%, #d94824 0 3px, transparent 4px),
    linear-gradient(180deg, #ffd75a 0 58%, #e9a93b 59% 100%);
  opacity: 0;
  box-shadow:
    inset -4px -5px 0 rgba(122, 63, 20, 0.12),
    0 8px 18px rgba(58, 31, 11, 0.12);
  animation: tacoFall var(--duration) linear var(--delay) forwards;
}

.taco-confetti::before,
.taco-confetti::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  height: 4px;
  border-radius: 999px;
}

.taco-confetti::before {
  top: 8px;
  background: #57a546;
  box-shadow:
    7px -3px 0 #57a546,
    15px -1px 0 #57a546;
}

.taco-confetti::after {
  bottom: 4px;
  background: #f5f0d6;
  box-shadow:
    9px -1px 0 #f5f0d6,
    18px 0 0 #f5f0d6;
}

@keyframes lockPop {
  0% { transform: scale(1); }
  45% { transform: scale(1.18) rotate(-4deg); }
  100% { transform: scale(1); }
}

@keyframes shackleOpen {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(7px, -3px) rotate(21deg); }
}

@keyframes tacoFall {
  0% {
    opacity: 0;
    transform: translate3d(0, -40px, 0) rotate(0deg);
  }
  10% {
    opacity: 0.95;
  }
  100% {
    opacity: 0.9;
    transform: translate3d(var(--drift), 110vh, 0) rotate(var(--spin));
  }
}

@media (max-width: 980px) {
  .hero,
  .workspace {
    grid-template-columns: 1fr;
  }

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

  .locks-panel {
    order: -1;
    position: static;
    max-height: none;
    overflow: visible;
  }
}

@media (max-width: 680px) {
  .app-shell {
    width: min(100% - 20px, 1460px);
    padding-top: 12px;
  }

  .hero {
    min-height: 0;
    padding-top: 14px;
  }

  .teacher-card h1,
  .hero h1 {
    font-size: 3rem;
  }

  .brief {
    font-size: 1rem;
  }

  .lock-row {
    grid-template-columns: 1fr;
  }

  .clue-scene {
    grid-template-columns: 1fr;
  }

  .quiz-row {
    grid-template-columns: 1fr;
  }

  .teacher-page {
    padding: 12px;
  }

  .teacher-card {
    padding: 24px;
  }
}