:root {
  color-scheme: light;
  --bg: #f5f3ee;
  --ink: #151716;
  --muted: #68716d;
  --line: #ddd5c7;
  --paper: #fffdf8;
  --soft: #ece5d9;
  --accent: #08776c;
  --accent-dark: #04574f;
  --accent-2: #d4512f;
  --bad: #9b3129;
  --good: #126e4f;
  --shadow: 0 16px 40px rgba(36, 31, 24, 0.1);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100svh;
  background:
    radial-gradient(circle at 16% -10%, rgba(212, 81, 47, 0.2), transparent 28%),
    linear-gradient(180deg, #f9f6ef 0%, var(--bg) 46%, #ece7dc 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}

.shell {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 14px max(22px, env(safe-area-inset-bottom));
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0;
}

.topbar p,
.scorebar span,
.chooser p {
  color: var(--muted);
  font-size: 13px;
}

.icon-button {
  width: 44px;
  flex: 0 0 auto;
  font-size: 22px;
  border-color: transparent;
  background: rgba(255, 253, 248, 0.74);
  box-shadow: 0 8px 22px rgba(36, 31, 24, 0.08);
}

.chooser {
  margin-bottom: 10px;
}

.chooser p {
  margin: 0 0 6px;
  font-weight: 800;
  letter-spacing: 0;
}

.mode-tabs,
.set-tabs {
  display: grid;
  gap: 5px;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.72);
  padding: 5px;
  box-shadow: 0 10px 26px rgba(36, 31, 24, 0.07);
}

.mode-tabs {
  grid-template-columns: repeat(3, 1fr);
}

.set-tabs {
  grid-template-columns: repeat(2, 1fr);
}

.mode-tabs button.active,
.set-tabs button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-color: transparent;
  color: white;
  box-shadow: 0 8px 18px rgba(8, 119, 108, 0.24);
}

.mode-tabs button,
.set-tabs button {
  border-color: transparent;
  background: transparent;
  font-weight: 800;
}

.scorebar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 12px 0;
}

.scorebar div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.86);
  padding: 10px;
  box-shadow: 0 10px 22px rgba(36, 31, 24, 0.06);
}

.scorebar strong {
  display: block;
  margin-top: 2px;
  font-size: 20px;
}

.study-card,
.summary {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.image-wrap {
  width: 100%;
  height: clamp(280px, 58svh, 520px);
  background: var(--soft);
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  display: grid;
  place-items: center;
  overflow: hidden;
  cursor: zoom-in;
}

.image-wrap img {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0;
  object-fit: contain;
}

.image-wrap:focus-visible {
  outline: 3px solid rgba(212, 81, 47, 0.42);
  outline-offset: -3px;
}

.answer-form {
  display: grid;
  gap: 8px;
  padding: 12px;
}

.answer-form label {
  font-size: 14px;
  font-weight: 700;
}

.answer-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.answer-row input {
  min-width: 0;
  min-height: 44px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: white;
}

.answer-row input:focus,
.review-search input:focus {
  border-color: var(--accent-2);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(212, 81, 47, 0.18);
}

.answer-row button,
.next-button,
.summary button,
.review-nav button {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-color: transparent;
  color: white;
  padding: 0 14px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(8, 119, 108, 0.22);
}

.feedback {
  margin: 0 12px 12px;
  border-radius: 8px;
  padding: 10px;
  line-height: 1.35;
}

.feedback strong,
.feedback span {
  display: block;
}

.feedback span {
  margin-top: 3px;
}

.feedback.good {
  background: #e2f4e9;
  color: var(--good);
}

.feedback.bad {
  background: #fae4df;
  color: var(--bad);
}

.next-button {
  width: calc(100% - 24px);
  margin: 0 12px 12px;
}

.review-panel {
  display: grid;
  gap: 12px;
  padding: 12px;
}

.review-details dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

.review-details div {
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}

.review-details div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.review-details dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.review-details dd {
  margin: 2px 0 0;
  font-size: 18px;
  font-weight: 700;
}

.review-search {
  display: grid;
  gap: 8px;
}

.review-search label {
  font-size: 14px;
  font-weight: 700;
}

.review-search input {
  min-height: 44px;
  border: 2px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: white;
}

.review-results {
  display: grid;
  gap: 6px;
}

.review-results p {
  color: var(--muted);
  font-size: 14px;
}

.review-results button {
  display: grid;
  gap: 2px;
  min-height: 0;
  padding: 8px 10px;
  text-align: left;
  background: #f8f3ea;
}

.review-results strong,
.review-results span {
  overflow-wrap: anywhere;
}

.review-results span {
  color: var(--muted);
  font-size: 13px;
}

.review-nav {
  display: grid;
  grid-template-columns: 54px 1fr 54px;
  align-items: center;
  gap: 8px;
}

.review-nav strong {
  text-align: center;
  font-size: 16px;
}

.review-nav button {
  padding: 0;
  font-size: 22px;
}

.review-nav button:disabled {
  opacity: 0.35;
}

.summary {
  margin-top: 12px;
  padding: 14px;
}

.summary h2 {
  font-size: 18px;
  margin-bottom: 6px;
}

.summary button {
  width: 100%;
  margin-top: 12px;
}

.missed-item {
  border-top: 1px solid var(--line);
  padding: 10px 0;
}

.missed-item strong {
  display: block;
}

.modal-open {
  overflow: hidden;
}

.image-modal {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
  background: rgba(12, 14, 13, 0.92);
}

.image-modal img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
}

.image-modal-close {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  right: 12px;
  z-index: 11;
  width: 44px;
  min-height: 44px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.92);
  color: var(--ink);
  font-size: 28px;
  line-height: 1;
}

@media (max-width: 480px) {
  .shell {
    padding-left: 10px;
    padding-right: 10px;
  }

  .topbar {
    margin-bottom: 10px;
  }

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

  h1 {
    font-size: 26px;
  }

  .mode-tabs,
  .set-tabs {
    gap: 4px;
  }

  .mode-tabs button,
  .set-tabs button {
    padding: 0 6px;
    font-size: 14px;
  }

  .chooser {
    margin-bottom: 8px;
  }

  .scorebar {
    gap: 6px;
    margin: 8px 0;
  }

  .scorebar div {
    padding: 8px;
  }

  .scorebar strong {
    font-size: 18px;
  }

  .image-wrap {
    aspect-ratio: auto;
    height: min(42svh, 360px);
    max-height: 42svh;
  }

  .is-review .image-wrap {
    height: min(54svh, 460px);
    max-height: 54svh;
  }
}