/* ── 단계 안내 ──────────────────────────────────── */
.step-guide {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.step-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: 999px;
  background: #F0EEFF;
  border: 2px solid #E0DEFF;
  transition: background .2s, border-color .2s, box-shadow .2s;
  cursor: default;
}
.step-item.active {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(91,110,245,.35);
}
.step-item.done {
  background: #E8FDF5;
  border-color: #2DD4A0;
}
.step-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #fff;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.step-item.active .step-num { background: rgba(255,255,255,.25); color: #fff; }
.step-item.done .step-num { background: #2DD4A0; color: #fff; }
.step-label {
  font-size: 13px; font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
}
.step-item.active .step-label { color: #fff; }
.step-item.done .step-label { color: #0D9F74; }
.step-arrow { color: #C0B8D8; font-size: 16px; font-weight: 700; }

/* ── controls 재배치: 계열→학과→검색창→초기화 ── */
.controls {
  display: grid;
  grid-template-columns: 170px 200px 1fr 88px;
  gap: 10px;
}
.ctrl-major:disabled {
  opacity: .5;
  cursor: not-allowed;
  background: #F5F4FF;
}
.ctrl-major.active {
  border-color: var(--primary);
  background: #fff;
  animation: pulse-border .4s ease;
}
@keyframes pulse-border {
  0% { box-shadow: 0 0 0 0 rgba(91,110,245,.4); }
  70% { box-shadow: 0 0 0 6px rgba(91,110,245,0); }
  100% { box-shadow: none; }
}

/* ── 선택된 도서 배너 ──────────────────────────── */
.selected-book {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding: 12px 16px;
  background: linear-gradient(135deg, #E8FDF5, #F0FFF9);
  border: 2px solid #2DD4A0;
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
  animation: slideDown .2s ease;
}
@keyframes slideDown { from { opacity:0; transform:translateY(-6px); } to { opacity:1; transform:translateY(0); } }
.selected-book-info {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}
.selected-label {
  font-size: 12px; font-weight: 800; color: #0D9F74;
  flex-shrink: 0;
}
.selected-title {
  font-size: 14px; font-weight: 800; color: var(--text);
}
.selected-author, .selected-publisher {
  font-size: 12.5px; color: var(--text-sub);
}
.selected-author::before { content: "저자: "; font-weight: 600; }
.selected-publisher::before { content: "출판사: "; font-weight: 600; }
.btn-copy {
  flex-shrink: 0;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, #2DD4A0, #0D9F74);
  color: #fff;
  font-size: 13px; font-weight: 700; font-family: inherit;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
  box-shadow: 0 3px 10px rgba(45,212,160,.35);
  white-space: nowrap;
}
.btn-copy:hover { opacity: .88; transform: translateY(-1px); }
.btn-copy.copied { background: linear-gradient(135deg, #5B6EF5, #7B5FF5); }

/* ── 이 책 선택 버튼 ───────────────────────────── */
.btn-select {
  margin-top: 8px; width: 100%; padding: 10px 0;
  border-radius: var(--radius-sm); border: 2px solid #2DD4A0;
  background: #E8FDF5;
  color: #0D9F74; font-size: 12.5px; font-weight: 700; font-family: inherit;
  cursor: pointer; transition: background .15s, color .15s, transform .1s;
}
.btn-select:hover { background: #2DD4A0; color: #fff; transform: translateY(-1px); }
.btn-explore {
  margin-top: 6px;
}

/* ── 카드 선택 상태 ────────────────────────────── */
.card-selected {
  border-color: #2DD4A0 !important;
  box-shadow: 0 0 0 3px rgba(45,212,160,.25), 0 10px 32px rgba(45,212,160,.15) !important;
}

/* ── h2 서브 텍스트 ────────────────────────────── */
.h2-sub {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-sub);
  margin-left: 4px;
}

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700;900&display=swap');

:root {
  --gap: 14px;
  --primary: #5B6EF5;
  --primary-light: #EEF0FF;
  --secondary: #FF6B9D;
  --secondary-light: #FFF0F5;
  --accent-green: #2DD4A0;
  --accent-yellow: #FFD166;
  --accent-orange: #FF8C42;
  --bg: #F7F4FF;
  --card-bg: #fff;
  --text: #1a1a2e;
  --text-sub: #6B6B8A;
  --radius: 20px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Noto Sans KR', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 10% 10%, rgba(91,110,245,.08) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(255,107,157,.07) 0%, transparent 50%);
}

.wrap { max-width: 1020px; margin: 0 auto; padding: 24px 20px; }

.top {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 28px 22px;
  box-shadow: 0 8px 32px rgba(91,110,245,.10);
  position: relative;
  overflow: hidden;
  border: 1.5px solid rgba(91,110,245,.10);
}
.top::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent-green), var(--accent-yellow));
  border-radius: var(--radius) var(--radius) 0 0;
}
.header-top {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}
.logo {
  height: 36px;
  width: auto;
  object-fit: contain;
  opacity: .75;
  filter: grayscale(20%);
  transition: opacity .2s;
}
.logo:hover { opacity: 1; }

.top::after {
  content: '📚';
  position: absolute;
  right: 28px; top: 22px;
  font-size: 48px;
  opacity: .12;
  pointer-events: none;
}

h1 {
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.sub {
  color: var(--text-sub);
  font-size: 13.5px;
  line-height: 1.55;
  margin-bottom: 20px;
  word-break: keep-all;
}

.controls {
  display: grid;
  grid-template-columns: 1fr 150px 190px 88px;
  gap: 10px;
}
.controls input, .controls select {
  height: 50px;
  border-radius: var(--radius-sm);
  border: 2px solid #E8E6FF;
  padding: 0 16px;
  font-size: 14px;
  font-family: inherit;
  background: #FAFAFF;
  color: var(--text);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.controls input:focus, .controls select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(91,110,245,.12);
  background: #fff;
}
.controls input::placeholder { color: #B0B0CC; }
.controls button {
  height: 50px;
  border-radius: var(--radius-sm);
  border: none;
  background: linear-gradient(135deg, var(--primary), #7B5FF5);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  box-shadow: 0 4px 14px rgba(91,110,245,.35);
}
.controls button:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(91,110,245,.45); }
.controls button:active { transform: translateY(0); }

.meta { margin-top: 14px; color: var(--text-sub); font-size: 13px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.meta strong { color: var(--primary); font-weight: 700; }
.status { color: var(--text-sub); }

.section { margin-top: 22px; }
.h2 {
  margin: 0 0 14px 2px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 7px;
}
.h2::before {
  content: '';
  display: inline-block;
  width: 4px; height: 16px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
  border-radius: 4px;
}

.grid { display: grid; gap: var(--gap); grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
  border: 1.5px solid #F0EEFF;
  transition: transform .2s, box-shadow .2s;
  position: relative;
  overflow: hidden;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(91,110,245,.14); border-color: rgba(91,110,245,.2); }
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}
.card:nth-child(3n+1)::before { background: linear-gradient(90deg, var(--primary), #A78BF5); }
.card:nth-child(3n+2)::before { background: linear-gradient(90deg, var(--secondary), var(--accent-orange)); }
.card:nth-child(3n+3)::before { background: linear-gradient(90deg, var(--accent-green), #38BDF8); }

.thumb {
  width: 100%;
  aspect-ratio: 3/4;
  min-height: 160px;
  overflow: hidden;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: linear-gradient(135deg, #F0EEFF, #FFE8F3);
  display: flex;
  align-items: center;
  justify-content: center;
}
.thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.card:hover .thumb img { transform: scale(1.03); }
.thumb .ph { font-size: 11px; color: #B0B0CC; padding: 0 10px; text-align: center; }

.card .title {
  font-size: 14.5px; font-weight: 800; margin: 0 0 8px 0;
  line-height: 1.4; word-break: keep-all; overflow-wrap: anywhere;
  color: var(--text); letter-spacing: -0.2px;
}
.card .line { margin: 0 0 2px 0; color: var(--text-sub); font-size: 12.5px; line-height: 1.5; word-break: keep-all; overflow-wrap: anywhere; }
.card .line strong { color: #9090B0; font-weight: 500; }

.badges { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.badge { display: inline-flex; padding: 4px 10px; border-radius: 999px; font-size: 11px; font-weight: 600; background: var(--primary-light); color: var(--primary); border: none; }
.card:nth-child(3n+2) .badge { background: var(--secondary-light); color: var(--secondary); }
.card:nth-child(3n+3) .badge { background: #E8FDF5; color: #0D9F74; }

.btn-explore {
  margin-top: 12px; width: 100%; padding: 11px 0;
  border-radius: var(--radius-sm); border: none;
  background: linear-gradient(135deg, var(--primary), #7B5FF5);
  color: #fff; font-size: 12.5px; font-weight: 700; font-family: inherit;
  cursor: pointer; transition: opacity .2s, transform .1s;
  box-shadow: 0 3px 10px rgba(91,110,245,.3);
}
.btn-explore:hover { opacity: .88; transform: translateY(-1px); }
.btn-explore:active { transform: translateY(0); }

.ph-no-cover { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; width: 100%; height: 100%; padding: 16px; background: linear-gradient(135deg, #F7F4FF, #FFF0F8); }
.ph-text { font-size: 11px; color: #C0B8D8; font-weight: 500; }
.btn-kyobo { display: inline-flex; align-items: center; justify-content: center; gap: 5px; padding: 9px 14px; border-radius: var(--radius-sm); background: linear-gradient(135deg, #00A33C, #007D2E); color: #fff; font-size: 11.5px; font-weight: 700; font-family: inherit; text-decoration: none; text-align: center; line-height: 1.4; word-break: keep-all; transition: opacity .15s, transform .1s; box-shadow: 0 3px 10px rgba(0,163,60,.3); }
.btn-kyobo:hover { opacity: .88; transform: translateY(-1px); }

.cover-candidates { width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; padding: 8px; background: linear-gradient(135deg, #F7F4FF, #FFF0F8); }
.cand-label { font-size: 11px; color: var(--primary); margin: 0; font-weight: 700; text-align: center; }
.cand-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; width: 100%; }
.cand-btn { padding: 0; border: 2px solid transparent; border-radius: 8px; overflow: hidden; cursor: pointer; background: none; aspect-ratio: 2/3; transition: border-color .15s, transform .1s, box-shadow .15s; }
.cand-btn:hover { border-color: var(--primary); transform: scale(1.06); box-shadow: 0 4px 12px rgba(91,110,245,.3); z-index: 1; position: relative; }
.cand-btn img { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }

.empty { grid-column: 1 / -1; padding: 40px 20px; border-radius: var(--radius); background: #fff; border: 2px dashed #E8E6FF; color: var(--text-sub); text-align: center; font-size: 14px; }

.foot { padding: 24px 6px; text-align: center; font-size: 12.5px; color: #B0B0CC; }

.modal-overlay { position: fixed; inset: 0; background: rgba(26,26,46,.5); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 20px; animation: fadeIn .18s ease; backdrop-filter: blur(4px); }
@keyframes fadeIn { from { opacity:0 } to { opacity:1 } }
.modal-box { background: #fff; border-radius: var(--radius); width: 100%; max-width: 560px; max-height: 85vh; display: flex; flex-direction: column; box-shadow: 0 24px 64px rgba(91,110,245,.2); animation: slideUp .22s ease; overflow: hidden; }
.modal-box-wide { max-width: 680px; }
.modal-body { padding: 20px 22px; overflow-y: auto; flex: 1; min-height: 0; }
@keyframes slideUp { from { transform: translateY(20px); opacity:0 } to { transform: translateY(0); opacity:1 } }
.modal-header { display: flex; align-items: flex-start; justify-content: space-between; padding: 22px 22px 18px; border-bottom: 2px solid #F0EEFF; gap: 12px; background: linear-gradient(135deg, #FAFAFF, #FFF8FC); }
.modal-badge { display: inline-block; background: linear-gradient(135deg, var(--primary), #7B5FF5); color: #fff; font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 999px; margin-bottom: 8px; }
.modal-title { margin: 0 0 4px; font-size: 17px; font-weight: 800; line-height: 1.3; word-break: keep-all; color: var(--text); }
.modal-sub { margin: 0; font-size: 13px; color: var(--text-sub); }
.modal-close { flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%; border: 2px solid #E8E6FF; background: #fff; cursor: pointer; font-size: 14px; color: var(--text-sub); display: flex; align-items: center; justify-content: center; transition: background .15s; }
.modal-close:hover { background: #F0EEFF; }
.modal-loading { display: flex; align-items: center; gap: 12px; color: var(--text-sub); font-size: 14px; padding: 20px 0; }
.spinner { width: 22px; height: 22px; flex-shrink: 0; border: 3px solid #E8E6FF; border-top-color: var(--primary); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg) } }

/* ── 탭 네비게이션 ──────────────────────────────────────── */
.report-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid #F0EEFF;
  background: #FAFAFF;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-shrink: 0;
}
.report-tabs::-webkit-scrollbar { display: none; }
.report-tab-btn {
  padding: 11px 14px;
  border: none;
  background: transparent;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-sub);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color .15s, border-color .15s;
  flex-shrink: 0;
}
.report-tab-btn:hover { color: var(--primary); }
.report-tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); background: #fff; }

/* ── 탭 패널 ─────────────────────────────────────────────── */
.report-tab-pane { display: none; }
.report-tab-pane.active { display: block; }

/* ── 섹션 블록 ───────────────────────────────────────────── */
.report-section {
  border: 1.5px solid #EEEEFF;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.report-sec-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: linear-gradient(135deg, #F7F6FF, #FFF8FC);
  border-bottom: 1px solid #EEEEFF;
}
.report-sec-icon { font-size: 15px; }
.report-sec-title { font-size: 13px; font-weight: 700; color: var(--primary); flex: 1; }
.modal-copy-btn {
  padding: 4px 10px;
  border-radius: 6px;
  border: 1.5px solid #DDD;
  background: #fff;
  font-size: 11.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  color: var(--text-sub);
  transition: background .15s, color .15s;
  display: flex;
  align-items: center;
  gap: 4px;
}
.modal-copy-btn:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
.modal-copy-btn.copied { background: #E8FDF5; color: #0D9F74; border-color: #2DD4A0; }
.report-sec-body { padding: 12px 14px; font-size: 15px; }

/* ── KV 리스트 ───────────────────────────────────────────── */
.kv-list { display: flex; flex-direction: column; gap: 7px; }
.kv-row { display: flex; gap: 10px; align-items: flex-start; }
.kv-k { font-size: 12px; font-weight: 700; color: #fff; background: var(--primary); padding: 2px 8px; border-radius: 4px; white-space: nowrap; flex-shrink: 0; min-width: 72px; text-align: center; }
.kv-k.problem-v { background: #E05C5C; }
.kv-k.problem-h { background: #F4A742; color: #fff; }
.kv-v { font-size: 14px; color: var(--text); line-height: 1.6; word-break: keep-all; }

/* ── 개념 카드 ───────────────────────────────────────────── */
.concepts-wrap { display: flex; flex-direction: column; gap: 7px; }
.concept-row { display: flex; gap: 10px; align-items: flex-start; }
.concept-name { font-size: 13px; font-weight: 700; color: var(--primary); background: var(--primary-light); padding: 3px 9px; border-radius: 6px; white-space: nowrap; flex-shrink: 0; }
.concept-meaning { font-size: 14px; color: var(--text); line-height: 1.6; word-break: keep-all; }

/* ── 탐구 질문 ───────────────────────────────────────────── */
.q-list { display: flex; flex-direction: column; gap: 8px; }
.q-item { display: flex; gap: 10px; align-items: flex-start; }
.q-type { font-size: 12px; font-weight: 700; color: #fff; background: var(--accent-green); padding: 2px 10px; border-radius: 4px; white-space: nowrap; flex-shrink: 0; min-width: 46px; text-align: center; }
.q-text { font-size: 14px; color: var(--text); line-height: 1.6; word-break: keep-all; }
.best-q { font-size: 15px; font-weight: 700; color: var(--primary); background: var(--primary-light); padding: 12px 14px; border-radius: 8px; line-height: 1.6; word-break: keep-all; border-left: 4px solid var(--primary); }

/* ── 검색 키워드 칩 ─────────────────────────────────────── */
.kw-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.kw-chip { background: #FFF0F5; color: var(--secondary); border: 1.5px solid #FFD6E8; padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; }

/* ── 사이트 목록 ─────────────────────────────────────────── */
.site-list { display: flex; flex-direction: column; gap: 7px; }
.site-row { display: flex; align-items: center; gap: 10px; }
.site-name { font-size: 14px; font-weight: 700; color: var(--primary); text-decoration: none; min-width: 100px; }
.site-name:hover { text-decoration: underline; }
.site-tip { font-size: 13px; color: var(--text-sub); }

/* ── 교과 연계 ───────────────────────────────────────────── */
.subject-list { display: flex; flex-direction: column; gap: 10px; }
.subject-row { display: flex; gap: 12px; align-items: flex-start; }
.subject-name { font-size: 13px; font-weight: 700; color: #fff; background: #F4A742; padding: 3px 10px; border-radius: 6px; white-space: nowrap; flex-shrink: 0; min-width: 72px; text-align: center; }
.subject-detail { display: flex; flex-direction: column; gap: 2px; }
.subject-unit { font-size: 14px; font-weight: 600; color: var(--text); }
.subject-concept { font-size: 13px; color: var(--text-sub); }
.report-tip { background: #FFFBE6; border: 1.5px solid #FFD166; border-radius: 8px; padding: 10px 14px; font-size: 13px; color: #7A5C00; line-height: 1.6; margin-top: 4px; }

/* ── 보고서 뼈대 ─────────────────────────────────────────── */
.report-guide-top { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-sub); background: #F7F6FF; border-radius: 8px; padding: 10px 14px; margin-bottom: 12px; word-break: keep-all; }
.draft-text { font-size: 14px; color: var(--text); line-height: 1.8; word-break: keep-all; border-left: 3px solid var(--primary-light); padding-left: 10px; }

@media (max-width: 860px) {
  .controls { grid-template-columns: 1fr 1fr; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .top { padding: 20px; }
  h1 { font-size: 20px; }
  .step-guide { gap: 5px; }
  .step-label { font-size: 11.5px; }
  .step-arrow { font-size: 13px; }
}
@media (max-width: 520px) {
  .wrap { padding: 16px 14px; }
  .controls { grid-template-columns: 1fr; }
  .controls input, .controls select, .controls button { height: 46px; }
  .grid { grid-template-columns: 1fr; gap: 10px; }
  .card { padding: 11px; }
  .card .title { font-size: 13px; }
  .top { padding: 18px 16px; }
  h1 { font-size: 18px; }
  .modal-box { border-radius: 16px; }
  .modal-header, .modal-body { padding: 16px; }
  .step-guide { flex-wrap: nowrap; gap: 4px; overflow-x: auto; padding-bottom: 2px; }
  .step-arrow { font-size: 10px; flex-shrink: 0; }
  .step-item { flex-shrink: 0; padding: 6px 10px; }
  .step-num { width: 18px; height: 18px; font-size: 10px; }
  .step-label { font-size: 11px; white-space: nowrap; overflow: visible; text-overflow: unset; }
  .selected-book { flex-direction: column; align-items: flex-start; }
  .h2-sub { display: none; }
}