/* ==========================================================================
   Components Stylesheet: Apple Pill Buttons, Store Cards & Minimal UI
   Strictly aligned with Apple Web Design Language (design.md)
   ========================================================================== */

/* ==========================================================================
   Buttons (design.md: button-primary, button-secondary-pill, button-dark-utility)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  font-family: inherit;
  font-size: 17px; /* SF Pro Text 17px */
  font-weight: var(--weight-regular);
  line-height: 1.18;
  letter-spacing: -0.374px;
  border-radius: var(--rounded-pill); /* 9999px full pill */
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.btn:hover {
  text-decoration: none;
}

/* System-wide micro-interaction: Active state scale(0.95) */
.btn:active {
  transform: scale(0.95);
}

/* 1. Primary Action Blue Pill CTA (design.md: button-primary) */
.btn-primary, .button-primary {
  background-color: var(--colors-primary); /* #0066cc Action Blue */
  color: #ffffff;
  padding: 11px 22px;
}

.btn-primary:hover, .button-primary:hover {
  background-color: #0077ed;
}

.btn-primary:focus-visible {
  outline: 2px solid var(--colors-primary-focus);
}

/* 2. Secondary Ghost Pill (design.md: button-secondary-pill) */
.btn-secondary, .button-secondary-pill {
  background-color: transparent;
  color: var(--colors-primary);
  border: 1px solid var(--colors-primary);
  padding: 11px 22px;
}

.btn-secondary:hover {
  background-color: rgba(0, 102, 204, 0.05);
}

/* 3. Dark Utility Button (design.md: button-dark-utility) */
.btn-dark-utility {
  background-color: var(--colors-ink); /* #1d1d1f */
  color: #ffffff;
  font-size: 14px;
  padding: 8px 15px;
  border-radius: var(--rounded-sm); /* 8px */
}

/* Global Nav Dropdown (LLM 서비스 바로가기) */
.global-nav-dropdown {
  position: relative;
  display: inline-block;
}

.btn-nav-dropdown {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  font-family: inherit;
  font-size: 12px;
  font-weight: var(--weight-regular);
  letter-spacing: -0.12px;
  padding: 6px 12px;
  border-radius: var(--rounded-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-nav-dropdown:hover,
.global-nav-dropdown.open .btn-nav-dropdown {
  background-color: rgba(255, 255, 255, 0.22);
}

.dropdown-chevron {
  font-size: 10px;
  color: #a1a1a6;
  transition: transform var(--transition-fast);
}

.global-nav-dropdown.open .dropdown-chevron {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 230px;
  background-color: rgba(29, 29, 31, 0.98);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  padding: 6px;
  list-style: none;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
  z-index: 3000;
  display: none;
  animation: dropdownFadeIn 0.15s ease-out;
}

/* 마우스 이동 시 꺼짐 방지 투명 브릿지 */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
  background: transparent;
}

@keyframes dropdownFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.global-nav-dropdown.open .dropdown-menu {
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  color: #ffffff;
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

button.dropdown-item {
  width: 100%;
  border: none;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.dropdown-divider {
  height: 1px;
  background-color: rgba(255, 255, 255, 0.14);
  margin: 6px 4px;
}

.dropdown-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.dropdown-icon {
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropdown-text {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.dropdown-title {
  font-size: 13px;
  font-weight: var(--weight-semibold);
  color: #ffffff;
  line-height: 1.2;
}

.dropdown-desc {
  font-size: 11px;
  color: #a1a1a6;
  margin-top: 2px;
}

.dropdown-ext {
  font-size: 12px;
  color: #86868b;
}

/* 4. Compact Sub-nav Pill */
.btn-nav-compact {
  background-color: var(--colors-primary);
  color: #ffffff;
  font-size: 13px;
  padding: 5px 14px;
  border-radius: var(--rounded-pill);
}

.btn-sm {
  font-size: 14px;
  padding: 8px 16px;
}

/* ==========================================================================
   Cards (Store Utility Card at 18px radius & Dark Tiles)
   ========================================================================== */

/* Store Utility Card (design.md: store-utility-card) */
.store-card {
  background-color: var(--colors-canvas); /* White */
  border: 1px solid var(--colors-hairline); /* 1px #e0e0e0 */
  border-radius: var(--rounded-lg); /* 18px */
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  text-align: left;
}

/* Dark Card (inside dark tiles) */
.store-card-dark {
  background-color: var(--colors-surface-tile-2); /* #2a2a2c */
  border: 1px solid var(--colors-hairline-dark);
  border-radius: var(--rounded-lg); /* 18px */
  padding: var(--spacing-lg);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  text-align: left;
}

/* Single System Shadow for Product Renders resting on surfaces */
.product-render-shadow {
  box-shadow: var(--shadow-product);
}

/* ==========================================================================
   Code & Prompt Panels
   ========================================================================== */

.prompt-panel-light {
  background-color: var(--colors-canvas-parchment);
  border: 1px solid var(--colors-hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  margin-block: var(--spacing-md);
  text-align: left;
}

.prompt-panel-dark {
  background-color: #1c1c1e;
  border: 1px solid var(--colors-hairline-dark);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  margin-block: var(--spacing-md);
  text-align: left;
}

.prompt-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.prompt-panel-dark .prompt-panel-header {
  border-bottom: 1px solid var(--colors-hairline-dark);
}

.prompt-panel-title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--colors-ink-muted-48);
}

.prompt-panel-dark .prompt-panel-title {
  color: #a1a1a6;
}

.prompt-panel-content {
  padding: 18px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  text-align: left;
  white-space: pre-wrap;
  word-break: break-all;
  user-select: text;
}

.prompt-panel-light .prompt-panel-content {
  color: var(--colors-ink);
  background-color: #ffffff;
}

.prompt-panel-dark .prompt-panel-content {
  color: #e5e5e7;
  background-color: #151516;
}

.copy-btn {
  background-color: var(--colors-primary);
  border: none;
  color: #ffffff;
  padding: 6px 14px;
  border-radius: var(--rounded-pill);
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.copy-btn:active {
  transform: scale(0.95);
}

.copy-btn.copied {
  background-color: #34c759;
}

/* ==========================================================================
   Timer Widget (Capsule Pill inside Sub-nav)
   ========================================================================== */

.timer-widget {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(0, 0, 0, 0.05);
  padding: 4px 12px;
  border-radius: var(--rounded-pill);
}

.timer-label {
  font-size: 12px;
  color: var(--colors-ink-muted-80);
}

.timer-display {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: var(--weight-semibold);
  color: var(--colors-ink);
  min-width: 44px;
  text-align: center;
}

.timer-display.pulse {
  color: #ff3b30;
}

.timer-controls {
  display: flex;
  gap: 3px;
}

.timer-btn {
  background: rgba(0, 0, 0, 0.08);
  border: none;
  color: var(--colors-ink);
  padding: 3px 8px;
  border-radius: var(--rounded-pill);
  font-size: 11px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.timer-btn:hover {
  background: rgba(0, 0, 0, 0.15);
}

.timer-btn:active {
  transform: scale(0.95);
}

/* ==========================================================================
   Pill Segmented Switcher / Tabs
   ========================================================================== */

.tab-nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  justify-content: center;
  align-items: center;
  margin-block: var(--spacing-lg);
  overflow-x: auto;
  scrollbar-width: none; /* Firefox 스크롤바 숨김 */
  -ms-overflow-style: none; /* IE/Edge */
}

.tab-nav::-webkit-scrollbar {
  display: none; /* Chrome, Safari 스크롤바 숨김 */
}

.tab-btn {
  background-color: var(--colors-canvas-parchment);
  border: 1px solid var(--colors-hairline);
  color: var(--colors-ink-muted-80);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.2px;
  padding: 6px 12px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.tab-btn:hover {
  color: var(--colors-ink);
}

.tab-btn.active {
  background-color: var(--colors-ink);
  color: #ffffff;
  border-color: var(--colors-ink);
}

.tab-btn:active {
  transform: scale(0.95);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Dark mode tab buttons (for Part 1 Near-black tile) */
.product-tile-dark .tab-btn {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: #a1a1a6;
}

.product-tile-dark .tab-btn:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.15);
}

.product-tile-dark .tab-btn.active {
  background-color: var(--colors-primary);
  color: #ffffff;
  border-color: var(--colors-primary);
}

/* ==========================================================================
   Refine Chips (다듬기 팁 원클릭 복사 칩)
   ========================================================================== */
.refine-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.refine-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #e5e5e7;
  font-size: 13px;
  font-family: inherit;
  padding: 6px 14px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.refine-chip:hover {
  background-color: rgba(0, 102, 204, 0.25);
  border-color: var(--colors-primary-on-dark);
  color: #ffffff;
  transform: translateY(-1px);
}

.refine-chip:active {
  transform: scale(0.96);
}

.refine-chip-icon {
  font-size: 11px;
  color: var(--colors-primary-on-dark);
}

/* ==========================================================================
   Safety & Security Alert Cards (할루시네이션 & 기업 보안)
   ========================================================================== */
.safety-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

@media (max-width: 768px) {
  .safety-grid {
    grid-template-columns: 1fr;
  }
}

.safety-card {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--rounded-lg);
  padding: 24px;
  text-align: left;
}

.safety-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.safety-card-title {
  font-size: 17px;
  font-weight: var(--weight-semibold);
  color: #ffffff;
}

.safety-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
}

.safety-badge-warning {
  background-color: rgba(255, 159, 10, 0.2);
  color: #ff9f0a;
  border: 1px solid rgba(255, 159, 10, 0.4);
}

.safety-badge-danger {
  background-color: rgba(255, 69, 58, 0.2);
  color: #ff453a;
  border: 1px solid rgba(255, 69, 58, 0.4);
}

.safety-desc {
  font-size: 14px;
  line-height: 1.5;
  color: #a1a1a6;
  margin-bottom: 14px;
}

.safety-actions {
  background-color: rgba(0, 0, 0, 0.25);
  border-radius: var(--rounded-md);
  padding: 12px 14px;
  border-left: 3px solid var(--colors-primary-on-dark);
}

.safety-actions-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--colors-primary-on-dark);
  margin-bottom: 4px;
  letter-spacing: -0.1px;
}

.safety-actions-text {
  font-size: 13px;
  color: #d6d6d6;
  line-height: 1.5;
  white-space: pre-line;
}

/* ==========================================================================
   Apple Style Clean Comparison Table (Claude.ai vs Claude Code)
   ========================================================================== */
.comparison-table-wrapper {
  overflow-x: auto;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--colors-hairline);
  background-color: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  margin-block: var(--spacing-xl);
}

.apple-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.apple-table th {
  background-color: var(--colors-canvas-parchment);
  padding: 16px 20px;
  font-size: 13px;
  font-weight: var(--weight-semibold);
  letter-spacing: -0.1px;
  color: var(--colors-ink);
  border-bottom: 1px solid var(--colors-hairline);
}

.apple-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--colors-hairline);
  color: var(--colors-ink-muted-80);
  line-height: 1.5;
  vertical-align: top;
}

.apple-table tr:last-child td {
  border-bottom: none;
}

.apple-table td strong {
  color: var(--colors-ink);
}

.apple-table .col-highlight {
  background-color: rgba(0, 102, 204, 0.02);
}

/* Dark Tile Support for Comparison Table */
.product-tile-dark .comparison-table-wrapper {
  background-color: var(--colors-canvas-dark-elevated);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.product-tile-dark .apple-table th {
  background-color: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.product-tile-dark .apple-table td {
  color: var(--colors-body-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.product-tile-dark .apple-table td strong {
  color: #ffffff;
}

.product-tile-dark .apple-table .col-highlight {
  background-color: rgba(41, 151, 255, 0.1);
}

/* PC에서는 모바일 비교 카드 뷰 숨김 */
.comparison-mobile-cards {
  display: none;
}

/* 스마트폰 전용 비교 카드 반응형 (가로 스크롤 표 대신 직관적인 세로 비교 카드 전환) */
@media (max-width: 768px) {
  .comparison-table-wrapper {
    display: none;
  }

  .comparison-mobile-cards {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 14px;
  }

  .compare-mobile-card {
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--rounded-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
  }

  .compare-mobile-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .compare-mobile-task-badge {
    font-size: 11px;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--colors-primary-on-dark);
    background: rgba(41, 151, 255, 0.15);
    border: 1px solid rgba(41, 151, 255, 0.3);
    padding: 2px 7px;
    border-radius: var(--rounded-pill);
    flex-shrink: 0;
  }

  .compare-mobile-task-title {
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    margin: 0;
    letter-spacing: -0.3px;
  }

  .compare-mobile-card-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .compare-mobile-item {
    border-radius: 8px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .compare-mobile-item.item-web {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
  }

  .compare-mobile-item.item-code {
    background-color: rgba(41, 151, 255, 0.08);
    border: 1px solid rgba(41, 151, 255, 0.35);
    border-left: 3px solid #2997ff;
  }

  .compare-mobile-item-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
  }

  .compare-mobile-item.item-code .compare-mobile-item-label {
    color: var(--colors-primary-on-dark);
  }

  .compare-mobile-sub {
    font-size: 11px;
    font-weight: 500;
    color: #a1a1a6;
  }

  .compare-mobile-item.item-code .compare-mobile-sub {
    color: rgba(41, 151, 255, 0.85);
  }

  .compare-mobile-item-desc {
    font-size: 13.5px;
    line-height: 1.55;
    color: #d6d6d6;
    margin: 0;
    word-break: keep-all;
  }

  .compare-mobile-item.item-code .compare-mobile-item-desc {
    color: #f5f5f7;
    font-weight: 500;
  }
}

/* ==========================================================================
   Accordion (Apple Style Clean Rows)
   ========================================================================== */

.accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 820px;
  margin-inline: auto;
  text-align: left;
}

.faq-row {
  background-color: var(--colors-canvas-parchment);
  border-radius: var(--rounded-lg); /* 18px */
  overflow: hidden;
  transition: background-color var(--transition-fast);
}

.faq-header {
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-title {
  font-size: 17px;
  font-weight: var(--weight-semibold);
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--colors-ink);
}

.faq-chevron {
  font-size: 13px;
  color: var(--colors-ink-muted-48);
  transition: transform var(--transition-fast);
}

.faq-row.open .faq-chevron {
  transform: rotate(180deg);
}

.faq-body {
  display: none;
  padding: 0 24px 20px 24px;
  color: var(--colors-ink-muted-80);
  font-size: 15px;
  line-height: 1.5;
}

.faq-row.open .faq-body {
  display: block;
}

/* 2열 인터랙티브 용어 사전 카드 그리드 (한눈에 스캔하는 치트시트) */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: var(--spacing-lg);
  text-align: left;
}

.glossary-card {
  background-color: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--rounded-md);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}

.glossary-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 102, 204, 0.35);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.07);
}

.glossary-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
}

.glossary-card-num {
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--colors-primary);
  background-color: rgba(0, 102, 204, 0.08);
  border: 1px solid rgba(0, 102, 204, 0.15);
  padding: 2px 8px;
  border-radius: var(--rounded-pill);
  flex-shrink: 0;
}

.glossary-card-term {
  font-size: 17px;
  font-weight: 600;
  color: var(--colors-ink);
  letter-spacing: -0.3px;
  margin: 0;
}

.glossary-card-desc {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--colors-ink-muted-80);
  margin: 0;
  word-break: keep-all;
}

@media (max-width: 768px) {
  .glossary-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .glossary-card {
    padding: 16px 18px;
  }
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 80px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

/* Floating Quick Navigation (Bottom-Right FAB) */
.floating-quick-nav {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.floating-nav-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(29, 29, 31, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--rounded-pill);
  padding: 10px 18px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-fast);
  user-select: none;
}

.floating-nav-toggle-btn:hover {
  background: rgba(45, 45, 48, 0.98);
  border-color: var(--colors-primary-on-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 102, 204, 0.4);
}

.floating-nav-toggle-btn:active {
  transform: scale(0.96);
}

.floating-btn-icon {
  font-size: 16px;
  transition: transform var(--transition-fast);
}

.floating-quick-nav.open .floating-btn-icon {
  transform: rotate(45deg);
}

.floating-nav-menu {
  width: 220px;
  max-height: calc(100vh - 90px);
  display: flex;
  flex-direction: column;
  background: rgba(29, 29, 31, 0.94);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--rounded-md);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.95);
  transform-origin: bottom right;
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.floating-quick-nav.open .floating-nav-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.floating-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12px;
  font-weight: 600;
  color: #a1a1a6;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.floating-nav-close-btn {
  background: none;
  border: none;
  color: #a1a1a6;
  cursor: pointer;
  font-size: 14px;
  padding: 0;
  line-height: 1;
  transition: color var(--transition-fast);
}

.floating-nav-close-btn:hover {
  color: #ffffff;
}

.floating-nav-list {
  list-style: none;
  margin: 0;
  padding: 6px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.floating-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--rounded-sm);
  color: #d6d6d6;
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

button.floating-nav-link {
  width: 100%;
  border: none;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.floating-nav-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
  margin: 6px 8px;
}

.floating-nav-link:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  transform: translateX(2px);
}

.floating-nav-link .nav-num {
  font-size: 10px;
  font-weight: 700;
  color: var(--colors-primary-on-dark);
  background: rgba(0, 102, 204, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  min-width: 28px;
  text-align: center;
}

@media (max-width: 480px) {
  .floating-quick-nav {
    bottom: 16px;
    right: 16px;
  }
  .floating-nav-toggle-btn {
    padding: 8px 14px;
    font-size: 13px;
  }
  .floating-nav-menu {
    width: 200px;
  }
}

.toast {
  background-color: rgba(29, 29, 31, 0.95);
  backdrop-filter: blur(20px);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--rounded-pill);
  font-size: 14px;
  letter-spacing: -0.224px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(16px);
  opacity: 0;
  transition: all var(--transition-normal);
  pointer-events: auto;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Infographic Gallery Grid & Zoom Card
   ========================================================================== */
.infographic-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-block: var(--spacing-lg);
}

.infographic-gallery-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-block: var(--spacing-lg);
}

@media (max-width: 900px) {
  .infographic-gallery,
  .infographic-gallery-2col {
    grid-template-columns: 1fr;
  }
}

/* Formula Card Split Layout (왼쪽 이미지, 오른쪽 1~4단계) */
.formula-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: stretch;
}

@media (max-width: 860px) {
  .formula-layout {
    grid-template-columns: 1fr;
  }
}

.formula-steps-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}

.formula-step-item {
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  text-align: left;
}

.formula-step-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.formula-step-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--colors-primary-on-dark);
  background: rgba(0, 102, 204, 0.2);
  padding: 2px 7px;
  border-radius: 4px;
}

.formula-step-name {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
}

.formula-step-text {
  font-size: 14px;
  color: #d6d6d6;
  line-height: 1.45;
}

/* Sample File Integrated Badge (Pill Badge with action buttons) */
.sample-file-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 4px 6px 4px 14px;
  border-radius: var(--rounded-pill);
  flex-wrap: wrap;
}

.sample-file-badge .sample-file-info {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.sample-file-badge .preview-filename {
  font-size: 13px;
  font-weight: 500;
  color: #f5f5f7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.sample-file-badge .sample-file-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sample-file-badge .badge-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  line-height: 1.2;
}

.sample-file-badge .badge-btn-zoom {
  background-color: var(--colors-primary);
  color: #ffffff;
}

.sample-file-badge .badge-btn-zoom:hover {
  background-color: #0077ed;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.4);
}

.sample-file-badge .badge-btn-zoom:active {
  transform: scale(0.96);
}

.sample-file-badge .badge-btn-download {
  background-color: rgba(52, 199, 89, 0.18);
  border-color: rgba(52, 199, 89, 0.5);
  color: #30d158;
}

.sample-file-badge .badge-btn-download:hover {
  background-color: #30d158;
  color: #000000;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(52, 199, 89, 0.35);
}

.sample-file-badge .badge-btn-download:active {
  transform: scale(0.96);
}

/* Sample File Preview Button */
.btn-sample-preview {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(0, 102, 204, 0.15);
  border: 1px solid rgba(0, 102, 204, 0.4);
  color: var(--colors-primary-on-dark);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-sample-preview:hover {
  background-color: rgba(0, 102, 204, 0.3);
  border-color: var(--colors-primary-on-dark);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 102, 204, 0.35);
}

.btn-sample-preview:active {
  transform: scale(0.96);
}

.preview-zoom-badge {
  font-size: 11px;
  background-color: var(--colors-primary);
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--rounded-pill);
  font-weight: 600;
}

/* Sample File Download Button (Light & Dark Support) */
.btn-sample-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(52, 199, 89, 0.12);
  border: 1px solid rgba(52, 199, 89, 0.4);
  color: #1e7e34;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-sample-download:hover {
  background-color: rgba(52, 199, 89, 0.22);
  border-color: #34c759;
  color: #155724;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(52, 199, 89, 0.25);
}

.btn-sample-download:active {
  transform: scale(0.96);
}

.btn-sample-download .download-badge {
  font-size: 11px;
  background-color: #34c759;
  color: #ffffff;
  padding: 2px 7px;
  border-radius: var(--rounded-pill);
  font-weight: 600;
}

.btn-sample-download.btn-dark-variant {
  background-color: rgba(52, 199, 89, 0.18);
  border-color: rgba(52, 199, 89, 0.5);
  color: #30d158;
}

.btn-sample-download.btn-dark-variant:hover {
  background-color: rgba(52, 199, 89, 0.32);
  color: #ffffff;
}

.gallery-item-card {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  text-align: left;
}

.gallery-item-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.gallery-thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  min-height: 160px;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.3);
}

.gallery-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-normal);
}

.gallery-item-card:hover .gallery-thumb {
  transform: scale(1.04);
}

.gallery-zoom-overlay {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.gallery-item-card:hover .gallery-zoom-overlay {
  opacity: 1;
}

.zoom-icon {
  font-size: 24px;
}

.zoom-text {
  font-size: 13px;
  font-weight: 500;
  color: #ffffff;
  background: rgba(0, 102, 204, 0.8);
  padding: 4px 12px;
  border-radius: var(--rounded-pill);
  letter-spacing: -0.2px;
}

.gallery-item-info {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.gallery-item-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.2px;
}

.gallery-item-desc {
  font-size: 13px;
  color: #a1a1a6;
}

/* 갤러리 v1 -> v2 확장·개선 비교 래퍼 */
.infographic-gallery-compare {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-block: var(--spacing-lg);
}

.infographic-gallery-compare .gallery-item-card {
  flex: 1 1 0;
  min-width: 0;
}

.gallery-compare-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding-inline: 4px;
  gap: 6px;
  z-index: 2;
}

.gallery-compare-badge {
  font-size: 12px;
  font-weight: 600;
  color: #2997ff;
  background: rgba(41, 151, 255, 0.15);
  border: 1px solid rgba(41, 151, 255, 0.35);
  padding: 3px 10px;
  border-radius: var(--rounded-pill);
  white-space: nowrap;
  letter-spacing: -0.2px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.gallery-compare-arrow {
  color: #2997ff;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 2px 6px rgba(41, 151, 255, 0.4));
  animation: pulseCompareArrow 2s infinite ease-in-out;
}

@keyframes pulseCompareArrow {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(5px);
  }
}

@media (max-width: 900px) {
  .infographic-gallery-compare {
    flex-direction: column;
    gap: 16px;
  }

  .infographic-gallery-compare .gallery-item-card {
    width: 100%;
    flex: none;
    min-width: 100%;
  }

  .gallery-thumb-wrapper {
    min-height: 180px;
  }

  .gallery-compare-connector {
    margin-block: 8px;
  }

  .gallery-compare-arrow {
    transform: rotate(90deg);
  }

  @keyframes pulseCompareArrow {
    0%, 100% {
      transform: translateY(0) rotate(90deg);
    }
    50% {
      transform: translateY(5px) rotate(90deg);
    }
  }
}

/* ==========================================================================
   Image Lightbox Modal (Apple Dark Blur Style)
   ========================================================================== */
.lightbox-modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  padding: 20px;
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  cursor: pointer;
}

.lightbox-container {
  position: relative;
  z-index: 10001;
  max-width: 95vw;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  animation: lightboxScaleUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes lightboxScaleUp {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.lightbox-close {
  position: absolute;
  top: -46px;
  right: 0;
  background-color: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
  font-size: 18px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background-color: rgba(255, 255, 255, 0.35);
  transform: scale(1.08);
}

.lightbox-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-image {
  max-width: 92vw;
  max-height: 82vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background-color: #1a1a1c;
  transition: max-width 0.2s ease, max-height 0.2s ease;
}

/* QR코드 전용 컴팩트 뷰 (스마트폰 스캔 및 화면 비율 최적화) */
.lightbox-modal.is-compact-mode .lightbox-image {
  max-width: min(340px, 78vw);
  max-height: 48vh;
  border-radius: 16px;
  background-color: #ffffff;
  padding: 12px;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.6);
}

.lightbox-caption {
  margin-top: 12px;
  font-size: 15px;
  font-weight: 500;
  color: #e5e5e7;
  letter-spacing: -0.2px;
  text-align: center;
}

/* ==========================================================================
   Prompt Edit & Customization UI (LocalStorage Persistence)
   ========================================================================== */
.prompt-panel-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.btn-edit-prompt,
.btn-save-prompt,
.btn-cancel-prompt,
.btn-reset-prompt {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

/* 수정 버튼 (다크 고스트 버튼) */
.btn-edit-prompt {
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #e5e5e7;
}

.btn-edit-prompt:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.4);
}

/* 저장 버튼 (Action Blue) */
.btn-save-prompt {
  background-color: var(--colors-primary);
  border: 1px solid var(--colors-primary);
  color: #ffffff;
  font-weight: 600;
}

.btn-save-prompt:hover {
  background-color: #0077ed;
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.4);
}

/* 취소 버튼 */
.btn-cancel-prompt {
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #a1a1a6;
}

.btn-cancel-prompt:hover {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.4);
}

/* 기본값 복원 버튼 */
.btn-reset-prompt {
  background-color: transparent;
  border: 1px solid rgba(255, 69, 58, 0.4);
  color: #ff453a;
}

.btn-reset-prompt:hover {
  background-color: rgba(255, 69, 58, 0.15);
  border-color: #ff453a;
}

/* 수정용 Textarea */
.prompt-edit-textarea {
  width: 100%;
  min-height: 180px;
  padding: 12px 14px;
  background-color: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--colors-primary-on-dark);
  border-radius: var(--rounded-md);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.25);
  box-sizing: border-box;
  margin-top: 8px;
}

.prompt-edit-textarea:focus {
  border-color: #2997ff;
  box-shadow: 0 0 0 3px rgba(41, 151, 255, 0.4);
}

/* 사용자 수정됨 배지 */
.badge-customized {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  background-color: rgba(0, 102, 204, 0.25);
  color: var(--colors-primary-on-dark);
  border: 1px solid rgba(0, 102, 204, 0.4);
  padding: 2px 7px;
  border-radius: 4px;
  margin-left: 6px;
  font-weight: 600;
  vertical-align: middle;
}

/* 프롬프트 개선 버튼 */
.btn-compare-prompt {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: rgba(0, 102, 204, 0.15);
  border: 1px solid rgba(0, 102, 204, 0.45);
  color: var(--colors-primary-on-dark);
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-compare-prompt:hover {
  background-color: rgba(0, 102, 204, 0.3);
  border-color: var(--colors-primary-on-dark);
  color: #ffffff;
}

.btn-compare-prompt.active {
  background-color: rgba(255, 69, 58, 0.2);
  border-color: rgba(255, 69, 58, 0.5);
  color: #ff453a;
}

/* ==========================================================================
   Prompt Side-by-Side Compare View (수정한 프롬프트 vs 기본 설정 프롬프트)
   ========================================================================== */
.prompt-compare-view {
  margin-top: 12px;
  animation: compareFadeIn 0.2s ease-out;
}

@keyframes compareFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.prompt-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 820px) {
  .prompt-compare-grid {
    grid-template-columns: 1fr;
  }
}

.compare-col {
  background-color: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--rounded-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
}

.compare-col-improved,
.compare-col-custom {
  border-left: 3px solid #30d158;
  background-color: rgba(48, 209, 88, 0.04);
}

.compare-col-default {
  border-left: 3px solid var(--colors-primary-on-dark);
  background-color: rgba(0, 102, 204, 0.04);
}

.compare-col-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
  gap: 6px;
}

.compare-col-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 4px;
  letter-spacing: -0.1px;
}

.compare-tag-improved,
.compare-tag-custom {
  background-color: rgba(48, 209, 88, 0.2);
  color: #30d158;
  border: 1px solid rgba(48, 209, 88, 0.4);
}

.compare-tag-default {
  background-color: rgba(0, 102, 204, 0.25);
  color: var(--colors-primary-on-dark);
  border: 1px solid rgba(0, 102, 204, 0.4);
}

.btn-apply-improved {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  background-color: rgba(48, 209, 88, 0.2);
  border: 1px solid rgba(48, 209, 88, 0.5);
  color: #30d158;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-apply-improved:hover {
  background-color: #30d158;
  color: #000000;
}

.compare-col-body {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: #e5e5e7;
  white-space: pre-line;
  flex-grow: 1;
}

.compare-col-default .compare-col-body {
  color: #b0b0b5;
}

.btn-mini-copy {
  font-size: 11px;
  padding: 3px 8px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #e5e5e7;
  border-radius: var(--rounded-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-mini-copy:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

/* ==========================================================================
   Mobile Smartphone Optimization (max-width: 600px)
   PC 환경에는 전혀 영향을 주지 않고 스마트폰 화면에서만 동작하는 전용 규칙
   ========================================================================== */
@media (max-width: 600px) {
  /* 1. Sub-nav 실습 타이머 컴팩트화 */
  .timer-widget {
    padding: 3px 8px;
    gap: 5px;
  }

  .timer-label {
    display: none; /* '실습 타이머' 라벨 숨김으로 가로폭 절약 */
  }

  .timer-preset-btn {
    display: none; /* 3m, 5m, 10m 프리셋 버튼 숨김 (PC에서만 사용) */
  }

  .timer-display {
    font-size: 13px;
    min-width: 38px;
  }

  .timer-btn {
    padding: 2px 7px;
    font-size: 10px;
  }

  /* 2. Global-nav LLM 드롭다운 버튼 */
  .btn-nav-dropdown {
    padding: 5px 8px;
    font-size: 11px;
  }

  .dropdown-menu {
    min-width: 210px;
    right: 0;
  }

  /* 3. Hero 강사 포트폴리오 배너 줄바꿈 및 모바일 폭 대응 */
  .hero-instructor-banner {
    flex-wrap: wrap !important;
    justify-content: center;
    padding: 6px 14px !important;
    font-size: 12.5px !important;
    gap: 6px !important;
    max-width: 100%;
    text-align: center;
  }

  /* 4. 카드 패딩 및 둥근 모서리 최적화 */
  .store-card,
  .store-card-dark {
    padding: 16px;
    border-radius: var(--rounded-md);
  }

  .safety-card {
    padding: 16px;
  }

  /* 5. 프롬프트 패널 가독성 & 여백 */
  .prompt-panel-header {
    padding: 8px 12px;
    flex-wrap: wrap;
    gap: 6px;
  }

  .prompt-panel-content {
    padding: 14px 12px;
    font-size: 13px;
    line-height: 1.55;
  }

  /* 6. 샘플 파일 다운로드 & 미리보기 뱃지 */
  .sample-file-badge {
    padding: 4px 8px;
    gap: 6px;
  }

  .sample-file-badge .preview-filename {
    font-size: 12px;
  }

  .sample-file-badge .badge-action-btn {
    padding: 4px 8px;
    font-size: 11px;
  }

  .btn-sample-download {
    padding: 5px 10px;
    font-size: 12px;
  }

  /* 7. 부서별 프롬프트 탭 1줄 유지 & 스크롤바 숨김 */
  .tab-nav {
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 4px;
    padding-inline: 4px;
    padding-bottom: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .tab-nav::-webkit-scrollbar {
    display: none;
  }

  .tab-btn {
    padding: 5px 9px;
    font-size: 12px;
  }

  .refine-chips {
    gap: 6px;
  }

  .refine-chip {
    padding: 5px 11px;
    font-size: 12px;
  }

  /* 8. 이미지 확대 라이트박스 닫기 버튼 모바일 터치 최적화 */
  .lightbox-modal {
    padding: 12px;
  }

  .lightbox-close {
    position: fixed;
    top: 14px;
    right: 14px;
    width: 38px;
    height: 38px;
    background-color: rgba(0, 0, 0, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.35);
    z-index: 10005;
  }

  .lightbox-caption {
    font-size: 13px;
    max-width: 90vw;
  }
}