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

:root {
  --blue:        #1c6ee0;
  --blue-dark:   #155bbd;
  --blue-light:  #eaf2fd;
  --red:         #e53935;
  --green:       #43a047;
  --green-dark:  #388e3c;
  --orange:      #fb8c00;
  --amber:       #fbb515;
  --info-blue:   #2196f3;
  --border:      #c9d3e0;
  --text:        #222;
  --text-soft:   #555;
  --bg:          #f4f6fa;
}

html, body {
  height: 100%;
  font-family: "Malgun Gothic", "맑은 고딕", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 14px;
}

.app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 10px 14px 24px;
}

/* ===================== 상단 상태 바 ===================== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px 12px;
}

.topbar-left { display: flex; align-items: baseline; gap: 6px; }
.brand     { font-size: 22px; font-weight: 800; color: #56D9F9; letter-spacing: 1px; }
.brand-sub { font-size: 22px; font-weight: 800; color: #56D9F9; letter-spacing: 1px; }
/* 시험창(상단 바) 브랜드는 진한 파랑(#1c6ee0), 안내 페이지는 시안 유지 */
.topbar-left .brand,
.topbar-left .brand-sub { color: var(--blue); }

.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 12px;
  background: #fff;
  font-size: 13px;
}
.exam-window { color: var(--text-soft); }
.exam-window strong { color: var(--text); }
.time-left { color: var(--text-soft); }
.time-left strong { color: var(--blue); font-size: 14px; }

/* ===================== 카테고리 탭 ===================== */
.tab-nav {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px 6px 0 0;
  overflow: hidden;
  background: #fff;
}
.tab {
  flex: 1;
  padding: 13px 4px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--text);
  background: #fff;
  border: none;
  border-right: 1px solid var(--border);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.tab:last-child { border-right: none; }
.tab:hover:not(.active) { background: #f0f4fa; }
.tab.active {
  background: var(--blue);
  color: #fff;
}

/* ===================== 문항 스텝 ===================== */
.step-nav {
  display: flex;
  background: var(--blue-light);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 6px 6px;
  padding: 10px 4px 8px;
  margin-bottom: 14px;
}
.step {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}
.step .step-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-soft);
}
.step .step-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid #9bb4d4;
  background: #fff;
  z-index: 1;
}
/* 스텝 사이 연결선 */
.step:not(:first-child)::before {
  content: "";
  position: absolute;
  top: calc(100% - 9px);
  left: -50%;
  width: 100%;
  height: 2px;
  background: #c2d2e8;
  z-index: 0;
}
.step.active .step-label { color: var(--blue); font-weight: 700; }
.step.active .step-dot { border-color: var(--blue); background: var(--blue); box-shadow: 0 0 0 3px rgba(28,110,224,.18); }
.step.done .step-dot { border-color: var(--green); background: var(--green); }
.step.done .step-label { color: var(--green-dark); }

/* ===================== 본문 ===================== */
.exam-body {
  display: grid;
  grid-template-columns: 1fr 1.06fr;
  gap: 16px;
  align-items: start;
}

/* ===================== 좌측 패널 ===================== */
.left-panel, .right-panel { display: flex; flex-direction: column; gap: 14px; }

.question-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 18px;
  min-height: 110px;
  max-height: 44vh;
  overflow-y: auto;
}
.question-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--blue-dark);
  margin-bottom: 12px;
  padding-bottom: 9px;
  border-bottom: 1px solid #eef1f6;
}
.question-text {
  font-size: 14px;
  line-height: 1.75;
  white-space: pre-line;
  color: var(--text);
}
.question-text strong { font-weight: 700; }
.question-instruction {
  margin-top: 14px;
  padding: 9px 12px;
  background: #fff7ed;
  border: 1px solid #fde3c4;
  border-radius: 5px;
  font-size: 13px;
  font-weight: 600;
  color: #b45309;
  white-space: pre-line; /* 지시문 내 \n을 줄바꿈으로 렌더 */
}

.question-file { margin-top: -4px; }
.dl-file {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: #e6f4ea;
  border: 1px solid #b6dcc0;
  color: var(--green-dark);
  font-weight: 700;
  font-size: 13.5px;
  padding: 10px 15px;
  border-radius: 6px;
  text-decoration: none;
}
.dl-file:hover { background: #d8eede; }

.answer-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px 14px;
  margin-bottom: 14px;
}
.answer-block:last-child { margin-bottom: 0; }

/* 객관식 보기 */
.choice-list { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.choice-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13.5px;
  line-height: 1.55;
  transition: background .12s, border-color .12s;
}
.choice-option:hover { background: #f5f8fc; }
.choice-option.selected { border-color: var(--blue); background: var(--blue-light); }
.choice-option input { margin-top: 3px; accent-color: var(--blue); flex-shrink: 0; }
.answer-file { display: block; margin-bottom: 4px; font-size: 13px; }
.answer-image-preview img {
  display: block;
  max-width: 100%;
  max-height: 260px;
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.answer-field-img {
  display: block;
  max-width: 220px;
  max-height: 170px;
  margin-top: 4px;
  border: 1px solid var(--border);
  border-radius: 5px;
}
.answer-label { font-size: 14px; font-weight: 700; }
.required { color: var(--red); font-weight: 700; }
.answer-guide { font-size: 12px; color: var(--blue); margin: 4px 0 9px; }
.answer-input {
  width: 100%;
  min-height: 150px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
}
.answer-input::placeholder { color: #b6c0cd; font-weight: 600; }
.answer-input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 2px rgba(28,110,224,.15); }

.left-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding-top: 4px;
}

/* ===================== 우측 패널 ===================== */
.model-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.model-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px 13px;
}
.model-box legend {
  font-size: 14px;
  font-weight: 700;
  padding: 0 6px;
  color: var(--text);
}
.radio {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 2px;
  font-size: 13.5px;
  cursor: pointer;
  color: var(--text);
}
.radio input { width: 15px; height: 15px; accent-color: var(--blue); cursor: pointer; }

.mode-hint {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-light);
  border: 1px solid #cfe0f7;
  border-radius: 5px;
  padding: 8px 12px;
}
.model-box:disabled { opacity: .5; background: #f5f7fa; }
.model-box:disabled legend { color: #9aa7b8; }
.model-box:disabled .radio { cursor: not-allowed; color: #9aa7b8; }

/* AI 미사용 문항(E-Q1 등): 우측 플레이그라운드 비활성 처리 */
.right-panel.playground-disabled .model-row,
.right-panel.playground-disabled .prompt-box,
.right-panel.playground-disabled .result-box {
  opacity: .45;
  filter: grayscale(.4);
  pointer-events: none;
  user-select: none;
}
.mode-hint.mode-hint-notice {
  color: #7a5c00;
  background: #fff8e1;
  border-color: #ffe082;
  font-weight: 600;
  line-height: 1.55;
}

.prompt-box, .result-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px 14px;
}
.prompt-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 9px; }
.prompt-title { font-size: 14px; font-weight: 700; }
.token-count { font-size: 13px; color: var(--red); font-weight: 600; }
.token-count strong { font-weight: 700; }

.prompt-input {
  width: 100%;
  min-height: 170px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.6;
}
.prompt-input::placeholder { color: #b6c0cd; }
.prompt-input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 2px rgba(28,110,224,.15); }

.prompt-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 11px; }
.prompt-actions-left { display: flex; gap: 10px; }

.result-head { font-size: 14px; font-weight: 700; margin-bottom: 9px; }
.result-output {
  min-height: 120px;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 10px 12px;
  font-size: 13.5px;
  line-height: 1.7;
  white-space: pre-wrap;
  color: var(--text);
  background: #fafbfd;
  overflow-y: auto;
  max-height: 320px;
}
.result-output:empty::before { content: "AI 응답 결과가 여기에 표시됩니다."; color: #b6c0cd; }
.result-output.loading::before { content: "AI가 응답을 생성하는 중입니다..."; color: var(--blue); }
.result-actions { display: flex; justify-content: flex-end; margin-top: 11px; }

/* 이미지 결과 */
.result-images { display: flex; flex-wrap: wrap; gap: 12px; }
.result-images figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px;
  background: #fff;
}
.result-images img {
  display: block;
  max-width: 260px;
  max-height: 260px;
  border-radius: 4px;
}
.result-images .dl {
  display: block;
  text-align: center;
  margin-top: 7px;
  font-size: 12.5px;
  color: var(--info-blue);
  text-decoration: none;
  font-weight: 600;
}
.result-images .dl:hover { text-decoration: underline; }
.result-images .img-status {
  padding: 26px 10px;
  text-align: center;
  color: var(--blue);
  font-size: 13.5px;
}
.result-images .img-error {
  padding: 14px;
  color: #c62828;
  background: #fdecea;
  border: 1px solid #f5c6c0;
  border-radius: 5px;
  font-size: 13px;
  line-height: 1.6;
  width: 100%;
}

/* ===================== 버튼 ===================== */
.btn {
  border: none;
  border-radius: 5px;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  cursor: pointer;
  transition: filter .15s, transform .05s;
}
.btn:hover { filter: brightness(1.07); }
.btn:active { transform: translateY(1px); }

.btn-prev     { background: #64748b; }
.btn-save     { background: var(--blue); }
.btn-viewall  { background: var(--orange); }
.btn-next     { background: var(--green); }
.btn-copy     { background: var(--green); }
.btn-log      { background: var(--info-blue); }
.btn-submit   { background: var(--amber); color: #5a4500; font-weight: 700; padding: 9px 26px; }
.btn-copy-ans { background: #fff; color: var(--green-dark); border: 1px solid var(--green); }
.btn-copy-ans:hover { background: #f1faf1; }

/* ===================== 반응형 ===================== */
@media (max-width: 980px) {
  .exam-body { grid-template-columns: 1fr; }
  .tab { font-size: 12.5px; padding: 11px 4px; }
  .step .step-label { font-size: 11px; }
}

/* ===================== 로그인 화면 ===================== */
.login-screen {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: linear-gradient(180deg, #eef3fb 0%, #f4f6fa 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-screen[hidden] { display: none; }
.login-card {
  width: 100%;
  max-width: 380px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 16px 50px rgba(20, 50, 100, .14);
  padding: 34px 30px 28px;
  text-align: center;
}
.login-logo { width: 86px; height: auto; margin: 0 auto 14px; display: block; }
.login-brand { margin-bottom: 6px; }
.login-sub { font-size: 13.5px; color: var(--text-soft); margin-bottom: 20px; }
.login-form { display: flex; flex-direction: column; gap: 10px; }
.login-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  text-align: center;
}
.login-input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 2px rgba(28,110,224,.15); }
.login-btn { background: var(--blue); padding: 12px; font-size: 15px; font-weight: 700; }
.login-error { min-height: 18px; margin-top: 11px; font-size: 13px; color: var(--red); font-weight: 600; }

/* ===================== 회차 선택 화면 ===================== */
.round-screen {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: linear-gradient(180deg, #eef3fb 0%, #f4f6fa 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.round-screen[hidden] { display: none; }
.round-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 16px 50px rgba(20, 50, 100, .14);
  padding: 34px 30px 30px;
  text-align: center;
}
.round-list { display: flex; flex-direction: column; gap: 12px; margin-top: 4px; }
.round-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 16px 20px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #fff;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.round-item:hover:not(.disabled) {
  border-color: var(--blue);
  background: #f6faff;
  box-shadow: 0 4px 14px rgba(28, 110, 224, .12);
}
.round-item.disabled { cursor: not-allowed; opacity: .6; background: #f6f7f9; }
.round-item-label { letter-spacing: .3px; }
.round-item-status {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}
.round-item-status.ready { color: #0a7d32; background: #e3f6e8; }
.round-item-status.soon  { color: #8a6d00; background: #fdf3d6; }

/* 회차 표시 배지 (상단 바 · 안내 화면) */
.round-badge {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-light);
  border: 1px solid #cfe6fb;
  border-radius: 999px;
  padding: 2px 10px;
  vertical-align: middle;
}
.round-badge:empty { display: none; }
.intro-back {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 9px 14px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--blue);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(20, 50, 100, .1);
}
.intro-back:hover { background: #f6faff; border-color: var(--blue); }

/* ===================== 시험 안내 화면 ===================== */
.intro-screen {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: linear-gradient(180deg, #eef3fb 0%, #f4f6fa 100%);
  overflow-y: auto;
  padding: 40px 16px;
}
.intro-screen.hidden { display: none; }

.intro-card {
  margin: 0 auto;
  width: 100%;
  max-width: 880px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(20, 50, 100, .12);
  overflow: hidden;
}
.intro-header {
  padding: 24px 34px 22px;
  border-bottom: 2px solid #e7f7fc;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.intro-header-text {
  border-left: 4px solid #56D9F9;
  padding-left: 16px;
}
.brand-line { margin-bottom: 6px; }
.intro-header h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
}
.intro-logo {
  max-height: 104px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}
.intro-body { padding: 24px 36px 8px; }
.intro-disclaimer {
  margin-bottom: 22px;
  padding: 12px 15px;
  background: #eef7ff;
  border: 1px solid #cfe6fb;
  border-left: 4px solid var(--blue);
  border-radius: 6px;
  font-size: 13.5px;
  line-height: 1.65;
  color: #2c4a66;
}
.intro-section { margin-bottom: 26px; }
.intro-section h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 14px;
  padding-bottom: 7px;
  border-bottom: 2px solid var(--blue-light);
}
.notice-list { padding-left: 22px; }
.notice-list li {
  margin-bottom: 11px;
  line-height: 1.6;
  font-size: 14.5px;
}
.notice-warning {
  margin-top: 16px;
  text-align: center;
  color: var(--red);
  font-weight: 700;
  font-size: 15px;
  background: #fdecea;
  border: 1px solid #f5c6c0;
  border-radius: 6px;
  padding: 13px;
}
.faq-q {
  font-weight: 700;
  font-size: 14.5px;
  margin-bottom: 6px;
  color: var(--text);
}
.faq-a {
  color: var(--red);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 18px 14px;
}
.intro-footer {
  padding: 18px 36px 28px;
  border-top: 1px solid #eef1f6;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  background: #fafbfd;
}
.intro-agree {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  cursor: pointer;
  user-select: none;
}
.intro-agree input { width: 17px; height: 17px; accent-color: var(--blue); cursor: pointer; }
.intro-start {
  background: var(--blue);
  padding: 12px 48px;
  font-size: 15px;
  font-weight: 700;
}
.intro-start:disabled { background: #b7c2d2; cursor: not-allowed; filter: none; }

/* ===================== 전체 답변 보기 모달 ===================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(20, 30, 50, .5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal-overlay[hidden] { display: none; }

.modal-card {
  width: 100%;
  max-width: 760px;
  max-height: 86vh;
  background: #fff;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .3);
  overflow: hidden;
  animation: modalIn .18s ease-out;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to   { opacity: 1; transform: none; }
}
.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 17px 22px;
  border-bottom: 1px solid #eef1f6;
}
.modal-header h2 { font-size: 18px; font-weight: 800; color: var(--text); }
.modal-progress {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-light);
  padding: 4px 11px;
  border-radius: 20px;
}
.modal-close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 26px;
  line-height: 1;
  color: #98a2b3;
  cursor: pointer;
  padding: 0 4px;
}
.modal-close:hover { color: #475569; }
.modal-body { padding: 16px 22px; overflow-y: auto; }
.modal-footer {
  padding: 13px 22px;
  border-top: 1px solid #eef1f6;
  display: flex;
  justify-content: flex-end;
  background: #fafbfd;
}

.answer-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
.answer-item:last-child { margin-bottom: 0; }
.answer-item-head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.answer-item-no { font-weight: 800; color: var(--blue-dark); }
.answer-item-title { font-weight: 700; font-size: 14px; color: var(--text); }
.answer-badge {
  margin-left: auto;
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}
.answer-badge.done { background: #e6f4ea; color: var(--green-dark); }
.answer-badge.todo { background: #f3f4f6; color: #9aa3af; }
.answer-field { margin-top: 9px; }
.answer-field-label { font-size: 12px; font-weight: 700; color: var(--text-soft); margin-bottom: 4px; }
.answer-field-value {
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  background: #f8fafc;
  border: 1px solid #eef1f6;
  border-radius: 5px;
  padding: 8px 10px;
  color: var(--text);
  max-height: 140px;
  overflow-y: auto;
}
.answer-field-value.empty { color: #b6c0cd; font-style: italic; }
.answer-goto {
  margin-top: 11px;
  background: none;
  border: 1px solid var(--blue);
  color: var(--blue);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 13px;
  border-radius: 5px;
  cursor: pointer;
}
.answer-goto:hover { background: var(--blue-light); }

/* ===================== LLM 로그 모달 항목 ===================== */
.log-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
}
.log-item:last-child { margin-bottom: 0; }
.log-item-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.log-idx { font-weight: 800; color: var(--text-soft); }
.log-type { font-size: 11.5px; font-weight: 700; padding: 2px 9px; border-radius: 20px; }
.log-type.txt { background: #e7f0fd; color: var(--blue-dark); }
.log-type.img { background: #fdeede; color: #b45309; }
.log-model { font-size: 13px; font-weight: 600; color: var(--text); }
.log-time { margin-left: auto; font-size: 12px; color: var(--text-soft); }
.log-prompt {
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  background: #f8fafc;
  border: 1px solid #eef1f6;
  border-radius: 5px;
  padding: 8px 10px;
  color: var(--text);
  max-height: 120px;
  overflow-y: auto;
}
.log-usage { margin-top: 7px; font-size: 12px; color: var(--red); font-weight: 600; }
.log-empty { text-align: center; color: #9aa3af; padding: 32px 12px; font-size: 14px; line-height: 1.7; }

/* ===================== 토스트 ===================== */
.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #2b2f36;
  color: #fff;
  padding: 11px 22px;
  border-radius: 6px;
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===================== 계산 근거 (6·7번 데이터 분석 문항) ===================== */
.result-calc { margin-top: 10px; }

.calc-box {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fbfcfe;
  font-size: 12.5px;
}
.calc-box > summary {
  cursor: pointer;
  padding: 9px 12px;
  font-weight: 700;
  color: var(--blue-dark);
  background: var(--blue-light);
  border-radius: 5px 5px 0 0;
  list-style: none;
}
.calc-box > summary::-webkit-details-marker { display: none; }
.calc-box > summary::before { content: "▸ "; }
.calc-box[open] > summary::before { content: "▾ "; }

.calc-body { padding: 10px 12px; max-height: 320px; overflow-y: auto; }

.calc-alert {
  background: #fdecea;
  border-left: 3px solid var(--red);
  color: #b1281f;
  padding: 8px 10px;
  border-radius: 3px;
  margin-bottom: 9px;
  line-height: 1.6;
}
.calc-warn {
  background: #fff8e6;
  border-left: 3px solid var(--amber);
  color: #7a5b06;
  padding: 8px 10px;
  border-radius: 3px;
  margin-bottom: 9px;
  line-height: 1.6;
}

.calc-step { margin-bottom: 12px; }
.calc-step:last-child { margin-bottom: 0; }
.calc-step-head { font-weight: 700; color: var(--text-soft); margin-bottom: 5px; }

.calc-table { width: 100%; border-collapse: collapse; }
.calc-table th,
.calc-table td {
  border: 1px solid #e3e8ef;
  padding: 5px 8px;
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
  word-break: break-word;
}
.calc-table th { width: 30%; background: #f4f7fb; font-weight: 600; color: var(--text-soft); white-space: nowrap; }
.calc-table td strong { color: var(--blue-dark); }
.calc-formula { font-family: Consolas, "D2Coding", monospace; font-size: 11.5px; color: #33475b; }

/* 경고만 표시하는 기본(응시) 모드 — 계산 수치는 노출하지 않음 */
.calc-notice { border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px 2px; background: #fbfcfe; }