/* ================================================================
   style.css - 전기기능사 CBT 모의고사
   ================================================================ */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard-dynamic-subset.css');

/* ── CSS Variables ────────────────────────────────────────── */
:root {
  --primary     : #1a3a8a;
  --primary-d   : #122b69;
  --primary-l   : #2a52c4;
  --accent      : #3b82f6;
  --success     : #16a34a;
  --success-bg  : #dcfce7;
  --danger      : #dc2626;
  --danger-bg   : #fee2e2;
  --warning     : #d97706;
  --warning-bg  : #fef3c7;
  --gray-50     : #f8fafc;
  --gray-100    : #f1f5f9;
  --gray-200    : #e2e8f0;
  --gray-300    : #cbd5e1;
  --gray-400    : #94a3b8;
  --gray-500    : #64748b;
  --gray-600    : #475569;
  --gray-700    : #334155;
  --gray-800    : #1e293b;
  --text        : #1e293b;
  --text-light  : #64748b;
  --white       : #ffffff;
  --shadow-sm   : 0 1px 3px rgba(0,0,0,.1);
  --shadow      : 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg   : 0 8px 24px rgba(0,0,0,.12);
  --radius      : 10px;
  --radius-sm   : 6px;
  --radius-lg   : 16px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
  color: var(--text);
  background: var(--gray-100);
  min-height: 100vh;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input  { font-family: inherit; }
img    { max-width: 100%; display: block; }

/* ── Utility ──────────────────────────────────────────────── */
.hidden  { display: none !important; }
.sr-only { position: absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); }

/* ================================================================
   LOGIN PAGE
   ================================================================ */
.login-body {
  background: linear-gradient(135deg, #0f1f4d 0%, #1a3a8a 50%, #2a52c4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  animation: fadeUp .4s ease;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo .academy-name {
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: .1em;
  margin-bottom: 4px;
}

.login-logo h1 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}

.login-logo .subtitle {
  font-size: .85rem;
  color: var(--text-light);
  margin-top: 6px;
}

.login-logo .logo-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--primary-l));
  border-radius: 16px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.login-form .form-group { margin-bottom: 16px; }
.login-form label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: 6px;
}
.login-form input[type="email"],
.login-form input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: border-color .2s;
  color: var(--text);
  background: var(--gray-50);
}
.login-form input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--white);
}

/* Name input row (hidden until email verified) */
.name-row { display: none; }
.name-row.visible { display: block; animation: fadeIn .3s ease; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  border: none;
  transition: all .2s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  margin-top: 8px;
}
.btn-primary:hover  { background: var(--primary-d); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
}
.btn-secondary:hover { background: var(--gray-200); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(1.08); }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-danger:hover  { filter: brightness(1.08); }
.btn-sm { padding: 7px 14px; font-size: .82rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ================================================================
   HEADER (공통)
   ================================================================ */
.site-header {
  background: var(--primary);
  color: #fff;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.site-header .logo {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -.01em;
}
.site-header .logo span { color: #7dd3fc; }
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .9rem;
}
.user-name-badge {
  background: rgba(255,255,255,.15);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: .82rem;
}
.btn-logout {
  background: rgba(255,255,255,.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  font-size: .82rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .2s;
}
.btn-logout:hover { background: rgba(255,255,255,.2); }

/* ================================================================
   MAIN PAGE
   ================================================================ */
.main-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px;
}

.main-hero {
  background: linear-gradient(135deg, var(--primary), var(--primary-l));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}
.main-hero::after {
  content: '';
  position: absolute;
  right: -20px;
  bottom: -20px;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,.06);
  border-radius: 50%;
}
.main-hero h2 { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; }
.main-hero p  { font-size: .92rem; opacity: .85; }
.main-hero .hero-meta {
  display: flex;
  gap: 20px;
  margin-top: 16px;
  font-size: .82rem;
  opacity: .8;
}
.hero-meta span { display: flex; align-items: center; gap: 4px; }

.sets-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--gray-700);
}

.sets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.set-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1.5px solid var(--gray-200);
  transition: transform .2s, box-shadow .2s;
}
.set-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }

.set-card-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-l));
  color: #fff;
  padding: 24px;
  cursor: pointer;
  position: relative;
  user-select: none;
  transition: filter .2s;
}
.set-card-header:hover { filter: brightness(1.1); }
.set-card-header .round-label {
  font-size: .75rem;
  font-weight: 600;
  opacity: .7;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.set-card-header .round-num {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  margin: 4px 0;
}
.set-card-header .round-title {
  font-size: .9rem;
  opacity: .85;
}
.set-card-header .start-arrow {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.8rem;
  opacity: .5;
}

.set-card-footer {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
}
.attempt-count {
  font-size: .82rem;
  color: var(--text-light);
}
.attempt-count strong { color: var(--primary); }

/* ================================================================
   MODAL (점수 확인)
   ================================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.open { display: flex; animation: fadeIn .2s ease; }
.modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp .25s ease;
}
.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 { font-size: 1.05rem; font-weight: 700; }
.btn-modal-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--gray-400);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}
.modal-body { padding: 20px 24px; }

.result-list { display: flex; flex-direction: column; gap: 10px; }
.result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-200);
  background: var(--gray-50);
}
.result-item .attempt-info { font-size: .82rem; color: var(--text-light); }
.result-item .score-info { font-size: 1rem; font-weight: 700; }
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
}
.badge-pass   { background: var(--success-bg); color: var(--success); }
.badge-fail   { background: var(--danger-bg);  color: var(--danger); }
.no-results { text-align: center; color: var(--text-light); padding: 24px 0; font-size: .9rem; }

/* ================================================================
   EXAM PAGE
   ================================================================ */
.exam-body { background: var(--gray-100); }

.exam-topbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: sticky;
  top: 56px;
  z-index: 90;
}

.exam-info { display: flex; align-items: center; gap: 20px; }
.q-counter {
  font-size: .95rem;
  font-weight: 700;
  color: var(--primary);
}
.q-counter span { color: var(--gray-400); font-weight: 400; }

.timer-box {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .88rem;
  color: var(--text-light);
}
.timer-display {
  font-size: 1.1rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--primary);
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  min-width: 72px;
  text-align: center;
}
.timer-display.warn  { color: var(--warning); background: var(--warning-bg); }
.timer-display.danger{ color: var(--danger);  background: var(--danger-bg); animation: pulse 1s infinite; }
.timer-total { font-size: .8rem; }

.exam-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  gap: 24px;
  align-items: start;
}

/* ── Question Panel ────────────────────────────────────────── */
.question-panel {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

.question-image-wrap {
  padding: 24px 24px 0;
  border-bottom: 1px solid var(--gray-100);
}
.question-image-wrap img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}
.img-loading {
  width: 100%;
  height: 300px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: .9rem;
}

/* 보기 버튼 그룹: 문제 영역 가로폭에 맞추되 좌우 여백 추가 */
.answer-options {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  margin-bottom: 8px;
  padding: 0 24px;        /* 👈 좌우 여백 24px 추가! */
  width: 100%;
  box-sizing: border-box; /* 👈 여백을 포함해서 100% 크기로 계산 (삐져나감 방지) */
}

/* 개별 보기 버튼: 남는 공간 없이 1/4씩 꽉 채움 */
.option-item {
  flex: 1;               /* 4개의 버튼이 동일한 비율로 쫙 늘어남 */
  /* max-width 제한을 완전히 삭제했습니다! */
  padding: 16px 0;       /* 가로가 넓어진 만큼 위아래 밸런스 조정 */
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: #ffffff;
  color: var(--gray-500);
  user-select: none;
}

/* 라디오 버튼 숨기기 (필수) */
.option-item input[type="radio"] {
  display: none;
}

/* 보기 번호 텍스트 */
.option-num {
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0;
  transition: all 0.2s ease;
}

/* 마우스를 올렸을 때 (Hover) */
.option-item:hover {
  border-color: var(--gray-300);
  background-color: var(--gray-50);
}

/* 선택되었을 때 (Active) - 딥 네이비 & 하이테크 블루 포인트에 맞춤 */
.option-item.selected {
  border-color: var(--primary);
  background-color: #F0F7FF;
  box-shadow: 0 2px 8px rgba(0, 82, 204, 0.1); 
}

/* 선택되었을 때 번호 색상 포인트 */
.option-item.selected .option-num {
  color: var(--primary);
  font-weight: 600;
}
.option-label { font-size: .95rem; }

/* ── Navigation ────────────────────────────────────────────── */
.question-nav {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.btn-nav {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  font-size: .9rem;
  font-weight: 600;
  transition: all .15s;
}
.btn-nav:hover:not(:disabled) { background: var(--gray-200); }
.btn-nav:disabled { opacity: .3; cursor: not-allowed; }

.btn-unanswered {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1.5px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  font-size: .88rem;
  font-weight: 600;
  transition: all .15s;
}
.btn-unanswered:hover { filter: brightness(.95); }
.btn-unanswered:disabled { opacity: .4; cursor: not-allowed; background: var(--gray-100); color: var(--gray-400); border-color: var(--gray-200); }

.btn-submit-exam {
  margin-left: auto;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 9px 20px;
  font-size: .9rem;
  font-weight: 700;
  border: none;
  transition: all .15s;
}
.btn-submit-exam:hover { background: var(--primary-d); }

/* ── OMR Card ──────────────────────────────────────────────── */
.omr-panel {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  position: sticky;
  top: 120px;
}
.omr-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--gray-200);
  font-size: .88rem;
  font-weight: 700;
  color: var(--gray-700);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.omr-legend {
  display: flex;
  gap: 8px;
  font-size: .75rem;
  font-weight: 400;
  color: var(--text-light);
}
.omr-legend span { display: flex; align-items: center; gap: 3px; }
.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--gray-300);
  display: inline-block;
}
.legend-dot.answered { background: var(--primary); border-color: var(--primary); }
.legend-dot.current  { background: #fff; border-color: var(--primary); outline: 2px solid var(--primary); }

.omr-grid {
  padding: 12px;
  overflow-y: auto;
  max-height: calc(100vh - 220px);
}
/* OMR 각 문항 줄 (행) */
.omr-row {
  display: flex;
  align-items: center;
  padding: 12px 0;           /* 👈 위아래 여백을 대폭 늘려서 숨통을 틔움 */
  border-bottom: 1px solid var(--gray-100); /* 👈 시선이 엇갈리지 않게 연한 가이드라인 추가 */
  transition: background-color 0.2s;
}

/* 마지막 줄은 밑줄 제거 */
.omr-row:last-child {
  border-bottom: none;
}

/* 마우스를 올렸을 때 (현재 어느 줄인지 명확히 표시) */
.omr-row:hover {
  background-color: var(--gray-50); 
}

/* OMR 문항 번호 */
.omr-qnum {
  width: 48px;               /* 번호 영역을 넉넉하게 잡음 */
  font-size: 1.15rem;        /* 👈 번호 크기 키움 (가독성 향상) */
  font-weight: 600;
  color: var(--gray-600);
  text-align: center;
}

/* OMR 보기 컨테이너 */
.omr-options {
  display: flex;
  gap: 16px;                 /* 👈 동그라미 사이 간격을 넓혀서 오클릭 완벽 방지 */
  flex: 1;
  justify-content: center;
}

/* OMR 개별 선택 동그라미 */
.omr-option {
  width: 38px;               /* 👈 클릭 영역 크기 대폭 확대 (기존 대비 약 1.5배) */
  height: 38px;              
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--gray-300);
  border-radius: 50%;
  font-size: 1.1rem;         /* 👈 기호(①②) 크기 키움 */
  color: var(--gray-500);
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

/* 마우스를 올렸을 때 (Hover) */
.omr-option:hover {
  border-color: var(--primary);
  background-color: #F0F7FF;
}

/* 선택되었을 때 (Active) */
.omr-option.selected {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  font-weight: 600;
}
.omr-row.current-row .omr-option {
  border-width: 2px;
}
.omr-row.current-row .omr-qnum { color: var(--primary); font-weight: 700; }

/* Mobile OMR toggle */
.omr-toggle-btn {
  display: none;
  width: 100%;
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

/* ================================================================
   RESULT PAGE
   ================================================================ */
.result-body {
  min-height: 100vh;
  background: var(--gray-100);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 40px 20px;
}

.result-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 520px;
  overflow: hidden;
  animation: fadeUp .4s ease;
}

.result-hero {
  padding: 36px 32px;
  text-align: center;
  position: relative;
}
.result-hero.pass   { background: linear-gradient(135deg, #14532d, var(--success)); }
.result-hero.fail   { background: linear-gradient(135deg, #7f1d1d, var(--danger)); }
.result-status {
  font-size: 3rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -.02em;
  margin-bottom: 8px;
}
.result-score-big {
  font-size: 1.4rem;
  font-weight: 700;
  color: rgba(255,255,255,.9);
}
.result-score-big strong { font-size: 2rem; color: #fff; }
.result-emoji { font-size: 3rem; margin-bottom: 8px; }

.result-details {
  padding: 24px 32px;
}
.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: .92rem;
}
.detail-row:last-child { border-bottom: none; }
.detail-label { color: var(--text-light); }
.detail-value { font-weight: 700; }

.result-actions {
  padding: 20px 32px 28px;
  display: flex;
  gap: 10px;
}
.result-actions .btn { flex: 1; }

/* ================================================================
   ADMIN PAGE
   ================================================================ */
.admin-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 24px;
}
.admin-section {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 24px;
  overflow: hidden;
}
.admin-section-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
  font-weight: 700;
  font-size: .95rem;
}
.admin-section-body { padding: 20px; }

.user-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
.user-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--gray-100);
  color: var(--gray-600);
  font-weight: 600;
  border-bottom: 1px solid var(--gray-200);
}
.user-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
.user-table tr:last-child td { border-bottom: none; }

.add-user-form {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}
.add-user-form input {
  flex: 1;
  padding: 9px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: .9rem;
}
.add-user-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.status-active   { color: var(--success); font-weight: 600; }
.status-inactive { color: var(--gray-400); }

/* ================================================================
   LOADING SPINNER
   ================================================================ */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.spinner.dark {
  border-color: var(--gray-200);
  border-top-color: var(--primary);
}

/* ================================================================
   ANIMATIONS
   ================================================================ */
@keyframes fadeIn  { from{opacity:0} to{opacity:1} }
@keyframes fadeUp  { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:none} }
@keyframes slideUp { from{opacity:0;transform:translateY(24px)} to{opacity:1;transform:none} }
@keyframes spin    { to{transform:rotate(360deg)} }
@keyframes pulse   { 0%,100%{opacity:1} 50%{opacity:.5} }

/* ================================================================
   RESPONSIVE - Mobile (<768px)
   ================================================================ */
@media (max-width: 768px) {
  /* Login */
  .login-card { padding: 32px 24px; }

  /* Main sets grid → single column */
  .sets-grid { grid-template-columns: 1fr; gap: 14px; }
  .main-hero { padding: 24px; }
  .main-hero h2 { font-size: 1.25rem; }
  .hero-meta { flex-wrap: wrap; gap: 10px; }

  /* Header */
  .site-header .logo { font-size: .9rem; }
  .user-name-badge { display: none; }

  /* Exam layout → single column */
  .exam-layout {
    grid-template-columns: 1fr;
    padding: 12px;
    gap: 12px;
  }
  .exam-topbar { padding: 8px 12px; gap: 8px; flex-wrap: wrap; }
  .timer-box { font-size: .8rem; }
  .timer-display { font-size: .95rem; }

  .question-image-wrap { padding: 14px 14px 0; }
  .answer-options      { padding: 14px; }
  .question-nav        { padding: 12px 14px; gap: 8px; }

  .btn-submit-exam { margin-left: 0; width: 100%; }
  .btn-unanswered  { font-size: .82rem; }
  .btn-nav { padding: 9px 14px; }

  /* OMR: hidden by default on mobile, shown via toggle */
  .omr-panel { position: static; }
  .omr-grid  { max-height: 260px; }
  .omr-toggle-btn { display: block; }

  /* Result */
  .result-hero   { padding: 28px 20px; }
  .result-details{ padding: 20px; }
  .result-actions{ padding: 16px 20px 24px; flex-direction: column; }

  /* Admin */
  .admin-container { padding: 16px; }
  .add-user-form { flex-direction: column; }
  .user-table { font-size: .8rem; }
}

@media (max-width: 480px) {
  .exam-info { flex-direction: column; align-items: flex-start; gap: 4px; }
  .omr-option { width: 22px; height: 22px; font-size: .65rem; }
  .omr-qnum   { font-size: .68rem; }
}
/* 📱 모바일(화면 너비 768px 이하) 전용 OMR 스타일 */
@media (max-width: 768px) {
  .omr-row {
    padding: 16px 0;     /* 터치 영역이 겹치지 않게 위아래 여백 추가 */
  }

  .omr-qnum {
    width: 36px;
    font-size: 1.25rem;  /* 좌측 문제 번호 확대 */
  }

  .omr-options {
    gap: 12px;           /* 원 크기가 커지므로 화면 밖으로 나가지 않게 간격 미세조정 */
  }

  .omr-option {
    width: 48px;         /* 👈 터치하기 아주 편안한 크기로 대폭 확대! (기존 38px) */
    height: 48px;
    font-size: 1.35rem;  /* 원 안의 번호(①②) 기호도 시원하게 확대 */
  }
}
/* 💻 PC 화면(769px 이상) 전용: 한 화면 고정 레이아웃 */
@media (min-width: 769px) {
  /* 1. 전체 시험 레이아웃의 높이를 화면 크기에 꽉 차게 고정 */
  .exam-layout {
    height: calc(100vh - 130px); /* 헤더와 상단바 높이를 제외한 화면 전체 높이 */
    align-items: stretch;
  }

  /* 2. 왼쪽 문제 패널을 Flex 박스로 만들어 높이 분배 */
  .question-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
  }

  /* 3. 문제 이미지 영역이 남는 세로 공간을 유연하게 모두 차지하게 함 */
  .question-image-wrap {
    flex: 1;
    min-height: 0; /* Flex 자식이 부모 크기를 뚫고 나가는 현상 방지 */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
  }

  /* 4. 이미지가 화면 밖으로 넘치지 않도록 비율을 유지하며 축소 */
  #question-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain; /* 이미지가 잘리지 않고 영역 안에 쏙 들어가게 맞춤 */
  }
}