:root {
  --navy: #061d2d;
  --navy2: #0d334a;
  --gold: #ffd861;
  --paper: #f6f0e2;
  --ink: #26323a;
  --green: #28765b;
  --red: #b44747;
  --shadow: 0 16px 45px rgba(0,0,0,.28);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  color: var(--ink);
  background: #051826;
}

button, input { font: inherit; }

button { cursor: pointer; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: linear-gradient(180deg, #061d2d, #082638);
  color: white;
  border-bottom: 1px solid rgba(255,255,255,.15);
  padding: 12px 16px 10px;
}

.brand {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.brand h1 {
  margin: 0;
  font-size: clamp(22px, 3vw, 38px);
  color: var(--gold);
  letter-spacing: -.04em;
}

.brand p {
  margin: 3px 0 0;
  font-size: 14px;
  opacity: .92;
}

.brand-star { color: var(--gold); font-size: 20px; }

.top-actions {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.hud-btn, .hud-chip {
  min-height: 44px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  border: 1px solid #35576b;
  border-radius: 13px;
  background: #0b2738;
  color: #fff;
  padding: 8px 12px;
  font-weight: 800;
}

.hud-btn:hover { background: #12384e; }

.game-shell {
  width: min(1700px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 0;
  background: #082334;
}

.scene-wrap { min-width: 0; }

.scene {
  position: relative;
  overflow: hidden;
  background: #111;
  min-height: 660px;
}

.scene-image {
  width: 100%;
  height: 100%;
  min-height: 660px;
  object-fit: cover;
  display: block;
}

.hotspot {
  position: absolute;
  z-index: 8;
  border: 2px dashed #ffde68;
  color: #ffe985;
  background: rgba(14, 27, 32, .76);
  border-radius: 10px;
  padding: 6px 9px;
  font-weight: 900;
  line-height: 1.25;
  box-shadow: 0 0 0 1px rgba(0,0,0,.55), 0 5px 20px rgba(0,0,0,.28);
  text-shadow: 0 1px 2px #000;
}

.hotspot:hover,
.hotspot:focus-visible {
  transform: translateY(-2px) scale(1.035);
  background: rgba(10, 35, 47, .92);
  outline: 3px solid rgba(255,238,144,.45);
}

.hotspot span { pointer-events: none; }

.computer { left: 24%; top: 35%; }
.books { left: 12%; top: 49%; }
.locker { left: 56%; top: 43%; }
.trash { left: 51%; top: 61%; }
.teacher { right: 8%; top: 53%; }
.door { right: 4%; top: 35%; }

.guide-card {
  position: absolute;
  left: 3%;
  bottom: 3%;
  z-index: 9;
  width: min(470px, 52%);
  display: flex;
  gap: 14px;
  align-items: center;
  background: rgba(249, 243, 228, .96);
  border: 1px solid rgba(0,0,0,.22);
  border-radius: 16px;
  padding: 14px 38px 14px 14px;
  box-shadow: var(--shadow);
}

.guide-card h3 {
  margin: 0 0 5px;
  font-size: 18px;
}

.guide-card p {
  margin: 0;
  line-height: 1.55;
  font-size: 14px;
}

.guide-avatar { font-size: 58px; }

#closeGuide {
  position: absolute;
  top: 5px;
  right: 8px;
  border: 0;
  background: transparent;
  font-size: 28px;
  color: #555;
}

.sidebar {
  background: #0b2a3c;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.paper-panel {
  background: var(--paper);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 8px 24px rgba(0,0,0,.22);
  border: 1px solid rgba(255,255,255,.25);
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 30px;
}

.panel-heading h2 {
  margin: 0;
  font-size: 25px;
}

.panel-heading p {
  margin: 3px 0 0;
  font-size: 13px;
  font-weight: 600;
  color: #5c6468;
}

.inventory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
  margin-top: 14px;
}

.inventory-slot {
  min-height: 72px;
  display: grid;
  place-items: center;
  border: 2px solid #dfd1b8;
  border-radius: 10px;
  background: rgba(255,255,255,.42);
  font-size: 30px;
}

.inventory-slot.filled {
  background: #fff8cf;
  border-color: #cab051;
  animation: pop .32s ease;
}

.clue-list {
  padding-left: 29px;
  margin: 16px 0 0;
}

.clue-list li {
  padding: 8px 0;
  font-size: 18px;
}

.clue-list strong {
  display: inline-block;
  min-width: 25px;
  color: #ac3d32;
  font-size: 24px;
}

.side-btn {
  position: relative;
  min-height: 60px;
  border-radius: 13px;
  border: 1px solid #55768a;
  background: #123f58;
  color: white;
  font-weight: 900;
  font-size: 18px;
}

.side-btn span {
  position: absolute;
  right: -5px;
  top: -8px;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #d64f43;
}

.side-btn.call { background: #17394e; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(1, 15, 24, .78);
  backdrop-filter: blur(3px);
}

.modal {
  position: relative;
  width: min(760px, 96vw);
  max-height: 92vh;
  overflow-y: auto;
  background: #fffdf7;
  border-radius: 20px;
  box-shadow: 0 28px 85px rgba(0,0,0,.45);
  padding: 26px;
  border: 4px solid #e8d3a4;
}

.modal-close {
  position: absolute;
  right: 14px;
  top: 12px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 0;
  background: #ebe4d6;
  font-size: 25px;
}

.modal-kicker {
  font-weight: 900;
  color: #a06921;
  margin-bottom: 3px;
}

.modal h2 {
  margin: 0 48px 14px 0;
  font-size: clamp(24px, 4vw, 34px);
}

.problem-copy {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.7;
}

.diagram-card {
  margin: 18px auto 4px;
  width: min(480px, 100%);
  background: #f5f5f1;
  border: 1px solid #d8d8d1;
  border-radius: 15px;
  padding: 14px;
}

.diagram-card svg {
  width: 100%;
  height: auto;
  display: block;
}

.answer-form { margin-top: 18px; }

.answer-form > label {
  display: block;
  font-weight: 900;
  margin-bottom: 7px;
}

.answer-row {
  display: flex;
  gap: 8px;
}

.answer-row input {
  flex: 1;
  min-width: 0;
  border: 2px solid #c9d0d2;
  border-radius: 11px;
  padding: 13px 14px;
  font-size: 18px;
}

.answer-row button,
.ending-card button,
#resumeBtn {
  border: 0;
  border-radius: 11px;
  background: #1f7258;
  color: white;
  font-weight: 900;
  padding: 12px 18px;
}

.feedback {
  min-height: 26px;
  font-weight: 900;
  margin-bottom: 0;
}

.feedback.good { color: #16734a; }
.feedback.bad { color: #b43e3e; }

.pause-cover,
.ending {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  text-align: center;
  background: rgba(3, 18, 28, .92);
  color: white;
  padding: 20px;
}

.pause-cover > div,
.ending-card {
  width: min(520px, 94vw);
}

.pause-icon {
  font-size: 72px;
  font-weight: 900;
}

.pause-cover h2,
.ending h2 {
  font-size: 40px;
  margin: 10px 0;
}

.ending-card {
  background: #fff7df;
  color: #24323a;
  border-radius: 24px;
  padding: 34px;
  box-shadow: 0 26px 90px rgba(0,0,0,.5);
}

.ending-emoji { font-size: 70px; }

.ending-time {
  margin: 18px 0;
  padding: 12px;
  border-radius: 12px;
  background: #efe4c4;
  font-size: 20px;
}

.hidden { display: none !important; }

@keyframes pop {
  0% { transform: scale(.7); }
  70% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

@media (max-width: 1100px) {
  .game-shell { grid-template-columns: 1fr; }
  .sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .side-btn { min-height: 54px; }
}

@media (max-width: 720px) {
  .top-actions span { display: none; }
  .hud-btn, .hud-chip { padding: 8px 10px; }
  .scene, .scene-image { min-height: 520px; }
  .scene-image { object-position: center; }
  .hotspot { font-size: 12px; padding: 5px 6px; }
  .guide-card { width: 92%; }
  .guide-avatar { font-size: 42px; }
  .sidebar { grid-template-columns: 1fr; }
  .answer-row { flex-direction: column; }
}


/* 순차 잠금 표시 */
.hotspot.locked {
  border-color: #9aa3aa;
  color: #d6dadd;
  background: rgba(18, 24, 29, .83);
  filter: grayscale(.45);
  opacity: .92;
}

.hotspot.locked:hover,
.hotspot.locked:focus-visible {
  transform: none;
  background: rgba(18, 24, 29, .9);
  outline-color: rgba(190, 197, 202, .35);
}