/* 「공원에서 쓰는 명제 시」 — 야외용: 큰 글씨, 선명한 대비, 큰 터치 영역 */
:root {
  --green: #3d6b45;
  --green-dark: #264a2d;
  --green-soft: #e4eedf;
  --yellow: #ffd666;
  --yellow-soft: #fff3c9;
  --yellow-line: #d9a925;
  --bg: #f2f5ec;
  --card: #ffffff;
  --text: #121c14;
  --muted: #3f4d42;
  --line: #b9c6b3;
  --danger: #a3211a;
  --danger-soft: #fde8e6;
  --radius: 20px;
  --font: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { font-size: 18px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
[hidden] { display: none !important; }
button, input, textarea, select { font: inherit; color: inherit; }

/* ---------- 상단 ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--green);
  color: #fff;
  padding: 12px 16px 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}
.app-header h1 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-align: center;
}
.app-header .sub { text-align: center; font-size: 0.85rem; font-weight: 700; opacity: 0.9; }
.progress { display: flex; gap: 8px; margin-top: 10px; padding: 0; list-style: none; }
.progress li {
  flex: 1;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.8);
}
.progress li::before {
  content: "";
  display: block;
  height: 10px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.28);
  margin-bottom: 4px;
}
.progress li.done::before, .progress li.current::before { background: var(--yellow); }
.progress li.current { color: #fff; }

/* ---------- 본문 ---------- */
main { max-width: 640px; margin: 0 auto; padding: 18px 16px 64px; }
.screen-title { font-size: 1.35rem; font-weight: 900; margin: 4px 0 12px; letter-spacing: -0.02em; }
.lead { font-size: 1.05rem; font-weight: 600; color: var(--muted); margin: 0 0 16px; }

.card {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card.soft { background: var(--green-soft); border-color: transparent; }
.card h3 { margin: 0 0 10px; font-size: 1.1rem; font-weight: 900; }

.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }
.field-label { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; font-weight: 900; font-size: 1.05rem; }
.hint { font-size: 0.85rem; font-weight: 700; color: var(--muted); }
.hint-chip { font-size: 0.8rem; font-weight: 800; color: var(--green-dark); background: var(--green-soft); padding: 2px 10px; border-radius: 99px; }

input[type="text"], input[type="email"], input[type="password"], input[inputmode], textarea {
  width: 100%;
  min-height: 56px;
  padding: 14px 16px;
  font-size: 1.1rem;
  border: 2px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
input:focus, textarea:focus { outline: 3px solid var(--yellow); outline-offset: 1px; border-color: var(--green); }
textarea { resize: vertical; line-height: 1.75; }
textarea.poem { min-height: 280px; font-size: 1.15rem; line-height: 1.9; }
input.invalid, textarea.invalid { border-color: var(--danger); background: var(--danger-soft); }

/* ---------- 버튼 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 58px;
  padding: 0 20px;
  font-size: 1.1rem;
  font-weight: 900;
  border-radius: 16px;
  border: 2px solid var(--green);
  background: #fff;
  color: var(--green-dark);
  cursor: pointer;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }
.btn-primary { background: var(--green); color: #fff; }
.btn-accent { background: var(--yellow); border-color: var(--yellow-line); color: #2e2300; }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-small { min-height: 44px; font-size: 0.95rem; padding: 0 14px; border-radius: 12px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn-row { display: flex; gap: 10px; margin-top: 8px; }
.btn-row .btn { flex: 1; }
.btn-row .btn.grow { flex: 2; }
.link-btn { background: none; border: 0; padding: 8px 0; color: var(--muted); font-weight: 700; text-decoration: underline; cursor: pointer; min-height: 44px; }

.toggle-group { display: flex; gap: 10px; }
.toggle-group .btn { flex: 1; min-height: 64px; font-size: 1.25rem; }
.toggle-group .btn[aria-pressed="true"] { background: var(--green); color: #fff; box-shadow: 0 0 0 3px var(--yellow); }
.toggle-group .btn.false[aria-pressed="true"] { background: var(--danger); border-color: var(--danger); }

/* ---------- 명제 미리보기 ---------- */
.example {
  background: var(--yellow-soft);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.example b { color: var(--green-dark); }
.proposition {
  background: var(--yellow-soft);
  border-left: 8px solid var(--yellow);
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 1.2rem;
  font-weight: 900;
}
.proposition.empty { color: var(--muted); font-weight: 700; font-size: 1rem; }
.prop-label { font-size: 0.85rem; font-weight: 900; color: var(--green-dark); display: block; }

/* ---------- 사진 ---------- */
.photo-box {
  border: 3px dashed var(--line);
  border-radius: 16px;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #fafcf8;
  margin-bottom: 12px;
  color: var(--muted);
  font-weight: 700;
  text-align: center;
  padding: 10px;
}
.photo-box.has-photo { border-style: solid; padding: 0; }
.photo-box img { display: block; width: 100%; max-height: 420px; object-fit: contain; background: #000; }
.photo-buttons { display: flex; gap: 10px; }
.photo-buttons label.btn { flex: 1; padding: 0 8px; font-size: 1rem; white-space: nowrap; }
.photo-buttons input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.status-line { font-weight: 800; color: var(--green-dark); margin-top: 8px; min-height: 1.6em; }

/* ---------- 오류 ---------- */
.error-box {
  background: var(--danger-soft);
  color: var(--danger);
  border: 2px solid var(--danger);
  border-radius: 14px;
  padding: 12px 14px;
  font-weight: 800;
  margin: 12px 0;
}
.error-box ul { margin: 4px 0 0; padding-left: 20px; }

/* ---------- 접기·펴기 ---------- */
details.fold { background: #fff; border: 2px solid var(--line); border-radius: 16px; margin-bottom: 16px; }
details.fold > summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 16px;
  font-weight: 900;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
details.fold > summary::-webkit-details-marker { display: none; }
details.fold > summary::after { content: "펼치기 ▾"; font-size: 0.85rem; color: var(--green-dark); }
details.fold[open] > summary::after { content: "접기 ▴"; }
details.fold .fold-body { padding: 0 16px 16px; }
.ref-list { margin: 0; padding: 0; list-style: none; }
.ref-list li { padding: 8px 0; border-top: 1px solid var(--green-soft); font-weight: 700; }
.ref-list li:first-child { border-top: 0; }
.ref-list .prop-label { margin-bottom: 2px; }
.example-poem { white-space: pre-wrap; font-size: 1.05rem; line-height: 1.9; font-weight: 600; margin: 0; }

/* ---------- 체크박스 ---------- */
.checks { display: flex; gap: 6px; }
.check {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-height: 58px;
  padding: 0 6px;
  font-size: 0.92rem;
  white-space: nowrap;
  border: 2px solid var(--line);
  border-radius: 14px;
  font-weight: 900;
  cursor: pointer;
  background: #fff;
}
.check input { width: 22px; height: 22px; margin: 0; flex: none; accent-color: var(--green); }
.check:has(input:checked) { border-color: var(--green); background: var(--green-soft); }

/* ---------- 갤러리 ---------- */
.sort-bar { display: flex; gap: 8px; margin-bottom: 14px; }
.sort-bar .btn { flex: 1; min-height: 48px; font-size: 0.95rem; padding: 0 8px; }
.sort-bar .btn[aria-pressed="true"] { background: var(--green); color: #fff; }
.poem-list { list-style: none; margin: 0; padding: 0; }
.poem-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  background: #fff;
  border: 2px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  margin-bottom: 10px;
  cursor: pointer;
  min-height: 72px;
}
.poem-item:active { background: var(--green-soft); }
.poem-item.mine { border-color: var(--yellow-line); background: #fffbea; }
.poem-item .info { flex: 1; min-width: 0; }
.poem-item .thumb {
  flex: 0 0 88px;
  height: 88px;
  border-radius: 14px;
  overflow: hidden;
  background: var(--green-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}
.poem-item .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.poem-item .title { font-size: 1.15rem; font-weight: 900; display: block; }
.poem-item .meta { font-size: 0.85rem; font-weight: 700; color: var(--muted); }
.poem-item .likes { font-weight: 900; color: var(--green-dark); white-space: nowrap; font-size: 1.05rem; }
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 900;
  padding: 2px 10px;
  border-radius: 99px;
  background: var(--yellow);
  color: #2e2300;
  vertical-align: middle;
}
.badge.gray { background: #dfe4dc; color: var(--muted); }
.badge.true { background: var(--green); color: #fff; }
.badge.false { background: var(--danger); color: #fff; }
.empty-state { text-align: center; padding: 30px 10px; color: var(--muted); font-weight: 700; }
.live-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: #b9c6b3; margin-right: 6px; }
.live-dot.on { background: #2fb344; box-shadow: 0 0 0 3px rgba(47, 179, 68, 0.25); }

/* ---------- 상세 ---------- */
.detail-photo { border-radius: 16px; overflow: hidden; margin-bottom: 14px; background: #000; }
.detail-photo img { display: block; width: 100%; max-height: 70vh; object-fit: contain; }
.poem-title { font-size: 1.5rem; font-weight: 900; margin: 0 0 4px; letter-spacing: -0.02em; }
.poet { font-weight: 800; color: var(--muted); margin-bottom: 14px; }
.poem-body { white-space: pre-wrap; font-size: 1.2rem; line-height: 2; margin: 0; font-weight: 600; }
.like-btn { min-width: 140px; }
.like-btn[aria-pressed="true"] { background: var(--yellow); border-color: var(--yellow-line); color: #2e2300; }

.toggle-group.small .btn { font-size: 1rem; min-height: 58px; padding: 0 8px; white-space: nowrap; }

/* ---------- 보물찾기 미션 ---------- */
.mission-btn { min-height: 64px; font-size: 1.15rem; margin-bottom: 14px; box-shadow: 0 4px 0 var(--yellow-line); animation: wiggle 2.4s ease-in-out infinite; }
@keyframes wiggle { 0%, 88%, 100% { transform: rotate(0); } 92% { transform: rotate(-1.5deg); } 96% { transform: rotate(1.5deg); } }
@media (prefers-reduced-motion: reduce) { .mission-btn { animation: none; } }
.mission-intro { font-weight: 700; line-height: 1.8; }
.mission-intro p { margin: 0 0 8px; }
.mission-intro p:last-child { margin: 0; }
.bubbles { list-style: none; margin: 0 0 16px; padding: 0; }
.bubble { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 14px; }
.bubble .who { flex: 0 0 64px; text-align: center; font-weight: 900; font-size: 0.85rem; color: var(--green-dark); }
.bubble .who .face {
  display: flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--green-soft); border: 3px solid var(--green); font-size: 2rem; margin-bottom: 2px;
}
.bubble .say {
  position: relative; flex: 1; background: #fff; border: 2px solid var(--line); border-radius: 18px;
  padding: 12px 14px; font-size: 1.1rem; font-weight: 800; line-height: 1.6; margin-top: 6px;
}
.bubble .say::before {
  content: ""; position: absolute; left: -10px; top: 18px; width: 16px; height: 16px;
  background: #fff; border-left: 2px solid var(--line); border-bottom: 2px solid var(--line); transform: rotate(45deg);
}
.code-input { text-transform: uppercase; letter-spacing: 0.15em; font-size: 1.4rem !important; font-weight: 900; text-align: center; }
.mission-msg { margin-top: 12px; padding: 12px 14px; border-radius: 14px; font-weight: 900; }
.mission-msg.warn { background: var(--yellow-soft); border: 2px solid var(--yellow-line); color: #4a3800; }
.mission-msg.bad { background: var(--danger-soft); border: 2px solid var(--danger); color: var(--danger); }
.success-screen {
  text-align: center; background: var(--yellow); border: 6px solid var(--green); border-radius: 28px;
  padding: 28px 16px 32px; color: #1d2a00;
}
.success-screen .big { font-size: 2.3rem; font-weight: 900; line-height: 1.3; margin: 0 0 18px; }
.success-screen .sid-label { font-weight: 900; font-size: 1.1rem; }
.success-screen .sid { font-size: 4.4rem; font-weight: 900; line-height: 1; letter-spacing: 0.04em; color: var(--green-dark); margin: 4px 0 6px; }
.success-screen .who-name { font-size: 3rem; font-weight: 900; line-height: 1.2; color: var(--green-dark); margin-bottom: 18px; overflow-wrap: anywhere; }
.success-screen .time { font-size: 1.3rem; font-weight: 800; margin-bottom: 20px; }
.success-screen .show-teacher { font-size: 1.35rem; font-weight: 900; background: var(--green); color: #fff; border-radius: 16px; padding: 14px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 120px);
  background: var(--green-dark);
  color: #fff;
  padding: 14px 20px;
  border-radius: 14px;
  font-weight: 800;
  max-width: calc(100% - 32px);
  transition: transform 0.25s ease, visibility 0.25s;
  visibility: hidden;
  z-index: 50;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}
.toast.show { transform: translate(-50%, 0); visibility: visible; }
.toast.error { background: var(--danger); }

.setup-warning { background: var(--danger-soft); border: 2px solid var(--danger); color: var(--danger); border-radius: 14px; padding: 14px; font-weight: 800; margin-bottom: 16px; }

/* ---------- 교사 화면 ---------- */
body.teacher main { max-width: 1440px; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.toolbar .spacer { flex: 1; }
.stats { font-weight: 800; color: var(--muted); }
.table-wrap { overflow-x: auto; background: #fff; border: 2px solid var(--line); border-radius: 16px; }
table.subs { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
table.subs th, table.subs td { padding: 10px 8px; text-align: left; border-bottom: 1px solid var(--green-soft); white-space: nowrap; }
table.subs th { font-size: 0.8rem; }
table.subs td.title-cell { white-space: normal; min-width: 120px; font-weight: 800; }
table.subs .loc-select { min-height: 36px; font-size: 0.85rem; max-width: 130px; }
table.subs .btn-small { min-height: 36px; padding: 0 10px; font-size: 0.85rem; }
table.subs th { background: var(--green-soft); font-weight: 900; position: sticky; top: 0; }
table.subs tbody tr { cursor: pointer; }
table.subs tbody tr:hover { background: #fafcf3; }
table.subs tbody tr.is-hidden { color: #8a948b; background: #f4f4f4; }
.login-card { max-width: 420px; margin: 40px auto; }
.tabs { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; border-bottom: 3px solid var(--green-soft); padding-bottom: 8px; flex-wrap: wrap; }
.tabs .spacer { flex: 1; }
.tab { min-height: 48px; padding: 0 18px; border-radius: 12px; border: 2px solid transparent; background: none; font-weight: 900; font-size: 1.05rem; cursor: pointer; color: var(--muted); }
.tab[aria-selected="true"] { background: var(--green); color: #fff; }
table.subs th.m { background: var(--yellow-soft); }
.loc-select { min-height: 40px; border-radius: 10px; border: 2px solid var(--line); padding: 0 8px; font-weight: 700; background: #fff; }
.prize-check { width: 24px; height: 24px; accent-color: var(--green); cursor: pointer; }
.loc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.loc-card { background: #fff; border: 2px solid var(--line); border-radius: 20px; padding: 18px; }
.loc-card.closed { background: #f1f1ef; border-style: dashed; }
.loc-card h3 { margin: 0 0 6px; font-size: 1.25rem; display: flex; align-items: center; gap: 8px; justify-content: space-between; }
.loc-stats { display: flex; gap: 10px; margin: 8px 0 14px; }
.loc-stats div { flex: 1; background: var(--green-soft); border-radius: 12px; padding: 8px; text-align: center; font-weight: 800; font-size: 0.85rem; }
.loc-stats b { display: block; font-size: 1.6rem; color: var(--green-dark); }
.loc-code-row { display: flex; gap: 8px; margin-bottom: 10px; }
.loc-code-row input { flex: 1; min-height: 48px; text-transform: uppercase; font-weight: 900; letter-spacing: 0.08em; }
.loc-puzzle { margin: 10px 0 0; padding-left: 20px; font-size: 0.9rem; font-weight: 600; }
dialog.detail {
  width: min(760px, calc(100% - 24px));
  max-height: calc(100% - 24px);
  border: 0;
  border-radius: 20px;
  padding: 0;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}
dialog.detail::backdrop { background: rgba(18, 28, 20, 0.55); }
dialog.detail .dlg-head { position: sticky; top: 0; background: var(--green); color: #fff; padding: 14px 18px; display: flex; align-items: center; gap: 10px; z-index: 1; }
dialog.detail .dlg-head h2 { margin: 0; font-size: 1.15rem; flex: 1; }
dialog.detail .dlg-body { padding: 18px; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 8px 12px; margin: 0 0 16px; }
.kv dt { font-weight: 900; color: var(--green-dark); }
.kv dd { margin: 0; font-weight: 600; white-space: pre-wrap; }
/* 학생별 PDF: 화면 밖에서 A4 너비로 그린 뒤 이미지로 변환 */
.pdf-holder { position: fixed; left: -10000px; top: 0; }
.pdf-sheet { width: 720px; padding: 8px; background: #fff; color: #111; font-family: var(--font); line-height: 1.6; }
.pdf-head { font-size: 13px; font-weight: 800; color: var(--green); border-bottom: 3px solid var(--green); padding-bottom: 6px; }
.pdf-who { display: flex; justify-content: space-between; font-size: 16px; font-weight: 800; margin: 10px 0 14px; }
.pdf-who span { font-size: 13px; font-weight: 600; color: #555; }
.pdf-photo { text-align: center; margin-bottom: 16px; }
.pdf-photo img { max-width: 100%; max-height: 340px; border-radius: 10px; }
.pdf-sheet h1 { font-size: 26px; margin: 0 0 10px; }
.pdf-poem { white-space: pre-wrap; font-size: 17px; line-height: 1.9; margin: 0 0 18px; padding: 14px 16px; background: #f6f8f2; border-radius: 10px; }
.pdf-notes { width: 100%; border-collapse: collapse; font-size: 14px; }
.pdf-notes th, .pdf-notes td { border: 1px solid #c9d3c4; padding: 6px 10px; text-align: left; vertical-align: top; white-space: pre-wrap; }
.pdf-notes th { width: 110px; background: var(--green-soft); }
@media (max-width: 520px) {
  .kv { grid-template-columns: 1fr; }
  .kv dd { margin-bottom: 6px; }
}