* { box-sizing: border-box; }

body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  background: #eef2f6;
  color: #1f2937;
  font-family: "Malgun Gothic", Arial, sans-serif;
}

button, input { font: inherit; }
button { border: 0; border-radius: 8px; cursor: pointer; font-weight: 700; }
.hidden { display: none !important; }

#start-container {
  min-height: 100vh;
  padding: 28px;
  background: #243447;
  color: #fff;
}

#start-container h1 {
  width: min(760px, 100%);
  margin: 0 0 20px;
  font-size: 42px;
  letter-spacing: 0;
}

#seed-input-box {
  width: min(760px, 100%);
  margin: 0 0 14px;
  text-align: left;
}

#seed-input-box label { color: #dbeafe !important; font-size: 14px !important; }
#seed-input-box input {
  width: 100%;
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid #475569;
  border-radius: 8px;
  background: #fff;
  color: #111827;
  text-align: left;
}

#start-btns {
  width: min(760px, 100%);
  display: grid !important;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: stretch !important;
}

.exam-settings {
  grid-column: 1 / -1;
  width: 100%;
  margin: 0;
  padding: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  border: 1px solid #475569;
  border-radius: 8px;
  background: rgba(15, 23, 42, .32);
}

.setting-row {
  min-height: 44px;
  padding: 0 4px;
  color: #dbeafe;
  font-size: 14px;
}

.setting-row input[type="number"] {
  width: 76px;
  padding: 8px;
  border: 1px solid #475569;
  border-radius: 8px;
}

.trend-note {
  grid-column: 1 / -1;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,.18);
  color: #cbd5e1;
  text-align: left;
}

.mode-btn {
  width: 100%;
  min-height: 84px;
  margin: 0;
  padding: 18px;
  align-items: flex-start;
  color: #fff;
  text-align: left;
  box-shadow: none;
}

.mode-btn:hover { transform: none; filter: brightness(.95); }
.mode-btn span { margin-top: 6px; color: rgba(255,255,255,.82); }
.btn-exam { background: #d94841; }
.btn-study { background: #2f80ed; }

#start-btns > div:last-child {
  grid-column: 1 / -1;
  width: 100% !important;
  margin-top: 2px !important;
  text-align: left !important;
}

.record-btn {
  width: fit-content;
  margin: 0;
  padding: 11px 16px;
  border: 0;
  border-radius: 8px;
  background: #0f172a;
  color: #fff;
}

#records-list {
  margin-top: 12px !important;
  border: 1px solid #475569;
  border-radius: 8px;
  background: rgba(15, 23, 42, .45) !important;
  color: #e5e7eb !important;
}

#quiz-container { height: 100vh; }
#main-content {
  flex: 1;
  min-width: 0;
  padding: 20px;
  background: #111827;
}

.image-box { height: calc(100vh - 92px); }
.question-frame { position: relative; display: inline-block; max-width: 100%; max-height: 100%; }
.image-box img {
  display: none;
  max-width: calc(100vw - 450px);
  max-height: calc(100vh - 112px);
  padding: 0;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 16px 40px rgba(0,0,0,.35);
}

#question-marker.pin-marker {
  position: absolute;
  left: var(--pin-x);
  top: var(--pin-y);
  width: 28px;
  height: 46px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  transform: translate(calc(-50% + 2px), -100%);
  pointer-events: none;
  z-index: 2;
}

#question-marker.pin-marker::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 4px;
  height: 31px;
  transform: translateX(-50%);
  border-radius: 3px;
  background: linear-gradient(90deg, #5a5a5a 0%, #d2d2d2 58%, #777 100%);
  box-shadow: 0 4px 10px rgba(0,0,0,.35);
}

#question-marker.pin-marker::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 18px;
  height: 18px;
  transform: translateX(-50%);
  border: 2px solid #6e0000;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,220,220,.8) 0 18%, transparent 19%), #b41414;
  box-shadow: 0 5px 12px rgba(0,0,0,.38);
}

.region-text-container {
  width: min(100%, 900px);
  margin-top: 12px;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: auto 1px minmax(0, 1fr);
  align-items: center;
  column-gap: 12px;
  border: 1px solid #334155;
  border-left: 0;
  border-radius: 8px;
  background: #1e293b;
}
.region-checkbox-label { margin: 0; color: #cbd5e1; white-space: nowrap; }
.region-divider { margin: 0; }
#region-box { min-width: 0; color: #e2e8f0; font-size: 14px; letter-spacing: 0; }

#sidebar {
  width: 410px;
  padding: 22px;
  gap: 16px;
  background: #fff;
  border-left: 1px solid #d8dee8;
  box-shadow: none;
}
.quiz-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
#sidebar h1 { margin: 0; padding: 0; border: 0; color: #1f2937; font-size: 24px; }
.home-link {
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid #d8dee8;
  border-radius: 8px;
  color: #475569;
  background: #f8fafc;
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}
.home-link:hover { border-color: #94a3b8; color: #0f172a; }
#timer-display {
  margin: 0;
  padding: 8px 10px;
  border: 0;
  border-radius: 8px;
  background: #e8f1ff;
  color: #1d4ed8;
  font-size: 16px;
}
.timer-warning { background: #fee2e2 !important; color: #b91c1c !important; }
#progress { margin: 0; color: #1f2937; font-size: 20px; }

.input-box { margin: 0; }
.input-box label { color: #64748b; }
#user-input {
  width: 100%;
  padding: 14px 15px;
  border: 2px solid #cbd5e1;
  border-radius: 8px;
  font-size: 18px;
}
#user-input:focus { border-color: #2563eb; box-shadow: 0 0 0 3px rgba(37,99,235,.15); }

#study-answer-box {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
}
#answer-hint {
  margin-bottom: 10px;
  padding: 12px;
  border-radius: 8px;
  background: #fff7ed;
  color: #9a3412;
  text-align: left;
}
.btn-hint { min-height: 46px; border-radius: 8px; background: #64748b; }
.btn-hint:hover { background: #475569; }

.controls { gap: 10px; }
.nav-row { gap: 10px; }
button.nav-action { min-height: 46px; padding: 10px; border-radius: 8px; }
.btn-nav { background: #2563eb; }
.btn-nav:hover { background: #1d4ed8; transform: none; }
.btn-finish { margin: 0; background: #16a34a; }

#result-container { padding: 24px; background: #f8fafc; }
#result-container > h1 { margin-top: 0; }
.score-display { color: #1f2937; }
#result-table { border: 1px solid #e5e7eb; box-shadow: none; }
#result-table th, #result-table td { padding: 12px; border: 0; border-bottom: 1px solid #e5e7eb; }
#result-table th { background: #e8eef6; color: #334155; }
.correct-btn { border-radius: 8px; background: #ef4444; }
.correct-btn.is-correct { background: #16a34a; }
.btn-img { border-radius: 8px; background: #475569; }

.modal { padding: 24px; background: rgba(0,0,0,.86); }
.modal-content {
  max-width: 96vw;
  max-height: 92vh;
  padding: 0;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
}
.modal-content img { max-width: 96vw; max-height: 92vh; border-radius: 8px; background: #fff; }
.close-btn {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  color: #111827;
  font-size: 28px;
  z-index: 21;
}

@media (max-width: 900px) {
  body { overflow: auto; height: auto; }
  #start-container { height: auto; min-height: 100vh; }
  #start-container h1 { font-size: 34px; }
  #start-btns, .exam-settings { grid-template-columns: 1fr; }
  #quiz-container { height: auto; min-height: 100vh; flex-direction: column; }
  #main-content { min-height: 52vh; }
  .image-box { height: auto; min-height: 45vh; }
  .image-box img { max-width: calc(100vw - 28px); max-height: 50vh; }
  #sidebar { width: 100%; border-left: 0; border-top: 1px solid #d8dee8; }
}