/* =========================================================
   기본 세팅 & 컬러 토큰
   ========================================================= */
:root {
  --brand:        #5b7cfa;
  --brand-dark:   #4a63cf;
  --ink:          #1f2937;
  --bg:           #f4f6fb;
  --border-soft:  #e5e7eb;
  --muted:        #94a3b8;
  --gradient:     linear-gradient(135deg,#1f2937,#4f46e5,#06b6d4);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

/* 공통 링크 */
a {
  color: var(--brand);
  text-decoration: none;
  transition: 0.15s ease;
}

a:hover {
  text-decoration: underline;
}


/* =========================================================
   Navbar
   ========================================================= */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: linear-gradient(90deg,#0f172a,#111827);
  color: #ecf0f1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .18);
}

.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* 로고 */
.navbar .brand {
  font-size: 20px;
  font-weight: 700;
  color: #ecf0f1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.navbar .brand:hover {
  color: var(--brand);
}

/* 메뉴 */
.nav-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 14px;
}

.nav-links a {
  padding: 6px 10px;
  font-size: 14px;
  color: #ecf0f1;
  border-radius: 999px;
  transition: 0.18s ease;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, .25);
}

/* 로그인/유저 박스 */
.user-status {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.user-status a {
  color: #ecf0f1;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 12px;
  transition: 0.18s ease;
}

.user-status a:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #ffffff;
  transform: translateY(-1px);
}
.notif-wrapper {
  position: relative;
}
.icon-button {
  position: relative;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.08);
  color: #f8fafc;
  border-radius: 999px;
  padding: 6px 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  transition: 0.18s ease;
}
.icon-button:hover {
  background: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}
.icon-button .badge {
  position: absolute;
  top: -6px;
  right: -6px;
  min-width: 20px;
  height: 20px;
  border-radius: 999px;
  background: #ef4444;
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.notification-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: 280px;
  background: #ffffff;
  color: #111827;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.18);
  border: 1px solid #e5e7eb;
  overflow: hidden;
  display: none;
  z-index: 120;
}
.notification-panel.open {
  display: block;
}
.notification-header {
  padding: 12px 14px;
  font-weight: 700;
  border-bottom: 1px solid #e5e7eb;
}
.notification-list {
  max-height: 260px;
  overflow-y: auto;
}
.notification-item {
  padding: 10px 14px;
  border-bottom: 1px solid #f1f5f9;
  display: block;
  color: inherit;
}
.notification-item:last-child {
  border-bottom: none;
}
.notification-item:hover {
  background: #f8fafc;
}
.notification-title {
  font-weight: 700;
  font-size: 13px;
}
.notification-body {
  font-size: 12px;
  color: #4b5563;
  margin-top: 4px;
}
.notification-empty {
  padding: 14px;
  font-size: 12px;
  color: #6b7280;
  text-align: center;
}
.profile-wrapper {
  position: relative;
}
.profile-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: 240px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.18);
  display: none;
  overflow: hidden;
  z-index: 120;
}
.profile-panel.open {
  display: block;
}
.profile-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid #e6e5eb;
}
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f8fafc;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
.profile-name {
  font-weight: 700;
  color: #111827;
}
.profile-sub {
  font-size: 12px;
  color: #6b7280;
}
.profile-list {
  display: flex;
  flex-direction: column;
}
.profile-item {
  padding: 10px 14px;
  color: #000000;
  font-weight: 800;
}
.profile-list .profile-item,
.user-status .profile-list .profile-item {
  color: #000000 !important;
}
.profile-item:hover {
  background: var(--brand);
  color: #ffffff;
  text-decoration: none;
}
.profile-list .profile-item:hover,
.user-status .profile-list .profile-item:hover {
  background: var(--brand);
  color: #ffffff !important;
}


/* =========================================================
   Layout & Card
   ========================================================= */
.container {
  max-width: 1100px;
  margin: 28px auto;
  padding: 0 20px;
}

main.container {
  background: #fff;
  padding: 24px 20px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .06);
}

.card {
  background: #fff;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  padding: 18px 20px;
  margin-bottom: 18px;
}

.week-wrapper {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 6px;
  max-width: 460px;
}
.week-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(24px, 1fr));
  gap: 4px;
  align-items: end;
  height: 120px;
}
.week-labels {
  display: grid;
  grid-template-columns: repeat(7,1fr);
  text-align: center;
  font-size: 11px;
  color: #475569;
  margin-top: 4px;
}
.heatmap-grid {
  grid-auto-rows: minmax(20px, 1fr);
}
.heatmap-wrapper .week-grid div {
  font-size: 11px;
}

.page-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 14px;
}


/* =========================================================
   Button
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: 0.15s ease;
}

.btn:hover {
  background: var(--brand-dark);
  box-shadow: 0 6px 14px rgba(26, 188, 156, .35);
  transform: translateY(-1px);
}

.btn-outline {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--border-soft);
}

.btn-outline:hover {
  background: #ecf0f1;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.pill-muted {
  background: #f3f4f6;
  color: #6b7280;
}

.result-message {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
}

.result-message.success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #047857;
}

.result-message.danger {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
}


/* =========================================================
   Forms
   ========================================================= */
input[type="text"],
input[type="password"],
input[type="email"],
input[type="file"],
textarea,
select {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-soft);
  margin-top: 6px;
  margin-bottom: 14px;
  font-size: 14px;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 1px rgba(26, 188, 156, 0.35);
}

.alert {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
}

.alert-success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #047857;
}

.choice-vertical {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.choice-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  background: #fff;
  font-size: 15px;
  cursor: pointer;
  transition: 0.15s ease;
  text-align: left;
}

.choice-option:hover {
  border-color: rgba(26, 188, 156, 0.5);
}

.choice-option.selected {
  border-color: var(--brand);
  background: rgba(26, 188, 156, 0.08);
  color: var(--brand-dark);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(26, 188, 156, .15);
}

.choice-index {
  font-weight: 700;
  min-width: 24px;
}

.choice-text {
  flex: 1;
  line-height: 1.4;
  white-space: pre-wrap;
}

.choice-display {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.choice-display-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: #f9fafb;
}

.choice-display-row.correct {
  border-color: rgba(34, 197, 94, 0.5);
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
  font-weight: 600;
}

.choice-display-row.wrong {
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(248, 113, 113, 0.15);
  color: #b91c1c;
}


/* =========================================================
   Table
   ========================================================= */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-soft);
}

.table th {
  background: #ecf0f1;
  font-weight: 600;
}


/* =========================================================
   Quiz Cards & Badges
   ========================================================= */
.question-list-card .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.question-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.question-card {
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 14px;
  background: #fcfcfc;
}

.question-card.pending {
  border-color: rgba(26, 188, 156, .35);
}

.question-card.wrong {
  border-color: rgba(220, 38, 38, 0.25);
}

.question-card.correct {
  border-color: rgba(34, 197, 94, 0.35);
}

.question-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 8px;
}

.question-card__text {
  margin: 0;
  font-size: 15px;
  white-space: pre-wrap;
}

.question-card__actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.badge {
  display: inline-flex;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-pending {
  background: rgba(26, 188, 156, 0.1);
  color: var(--brand-dark);
}

.badge-wrong {
  background: rgba(220, 38, 38, 0.12);
  color: #b91c1c;
}

.badge-correct {
  background: rgba(34, 197, 94, 0.15);
  color: #15803d;
}

.empty-text {
  font-size: 14px;
  color: #6b7280;
}

.pagination {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
}

.page-button {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 13px;
  color: var(--ink);
  background: #fff;
  transition: 0.15s ease;
}

.page-button:hover {
  background: #ecf0f1;
}

.page-button.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.page-info {
  font-size: 13px;
  color: #6b7280;
}

.question-header-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.question-number-box {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef2ff;
  color: #3730a3;
  font-weight: 600;
  font-size: 14px;
}

.question-number-box.success {
  background: #ecfdf5;
  color: #047857;
}

.question-number-box.danger {
  background: #fee2e2;
  color: #b91c1c;
}

.question-tag {
  font-size: 13px;
  color: #6b7280;
}

.question-tag.success {
  color: #047857;
}

.question-tag.danger {
  color: #b91c1c;
}


/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--border-soft);
  background: #f9fafb;
  font-size: 13px;
  color: var(--muted);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 20px 18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.footer-title {
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.footer-link {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  background: #ffffff;
  border: 1px solid var(--border-soft);
  color: var(--ink);
}

.footer-link:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  box-shadow: 0 6px 14px rgba(26, 188, 156, .25);
}


/* =========================================================
   반응형
   ========================================================= */
@media (max-width: 768px) {
  .navbar-inner {
    padding: 10px 14px;
    gap: 10px;
  }

  .navbar .brand {
    font-size: 18px;
  }

  .user-status {
    order: 2;
    width: 100%;
    justify-content: flex-end;
  }

  .nav-links {
    order: 3;
    width: 100%;
    gap: 8px;
    flex-wrap: wrap;
  }

  main.container {
    padding: 18px 14px;
  }
}

@media (max-width: 480px) {
  .navbar-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .user-status {
    justify-content: flex-start;
  }

  .nav-links {
    justify-content: flex-start;
  }
}