/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-color);
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.2);
  width: 90%;
  max-width: 500px;
  padding: 2rem;
  position: relative;
  animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

:root {
  --bg-color: #F8F9FA;
  --panel-bg: #FFFFFF;
  --text-primary: #363636;
  --text-secondary: #96989C;
  --accent-color: #04C949;
  --accent-hover: #038F34;
  --border-color: #E8E9EA;
  --error-color: #ef4444;
  --highlight-bg: #E6FAED;
  --disabled-color: #B8B9BC;
}

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

body {
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

.container {
  width: 95%;
  max-width: 1400px;
  margin: 0 auto;
}

.header {
  margin-bottom: 2rem;
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0;
  color: var(--accent-color);
}

.header p {
  color: var(--text-secondary);
  margin: 0;
}

.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.search-box {
  display: flex;
  gap: 0.5rem;
}

.form-group input {
  flex: 1;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background: #FFFFFF;
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(4, 201, 73, 0.2);
}

.btn-primary {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  background-color: var(--accent-color);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.hidden {
  display: none !important;
}

.error-message {
  margin-top: 1rem;
  padding: 1rem;
  background-color: rgba(239, 68, 68, 0.1);
  border-left: 4px solid var(--error-color);
  border-radius: 0.25rem;
  color: var(--error-color);
}

.results-container {
  margin-top: 2rem;
  animation: fadeIn 0.4s ease-out;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.results-container h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
}

.table-responsive {
  overflow-x: auto;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background: var(--panel-bg);
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 1100px; /* Keep minimum width to prevent column squeezing on PC */
}

th, td {
  padding: 1rem 0.5rem; /* Reduced padding for better data density */
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap; /* Prevent line wrapping on PC */
}

th {
  background-color: #F8F9FA;
  font-weight: 600;
  color: var(--text-secondary);
}

/* PC desktop view values wrapper */
.val-wrapper {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.val-pc {
  color: var(--accent-color);
  font-weight: 600;
}

.val-mobile {
  color: var(--text-secondary);
  font-size: 0.85em;
}

/* For search counts in the second column, display black instead of green on PC */
td[data-label="검색수"] .val-pc {
  color: var(--text-primary);
  font-weight: 500;
}

/* Mobile header row is hidden on PC */
.mobile-header-row {
  display: none;
}

/* Badge for unit display */
.price-unit-label {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  white-space: nowrap;
}

tbody tr {
  transition: background-color 0.2s;
}

tbody tr:hover {
  background-color: var(--highlight-bg);
}

/* Searched keyword emphasis */
.main-keyword-row {
  background-color: var(--highlight-bg);
  border-left: 4px solid var(--accent-color);
}

.main-keyword-row:hover {
  background-color: rgba(4, 201, 73, 0.15);
}

/* Bid action button/area */
.bid-cell {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.bid-amount {
  font-weight: 600;
  color: var(--accent-color);
  min-width: 80px;
}

.position-control {
  display: flex;
  align-items: center;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  padding: 0.25rem;
  gap: 0.25rem;
}

.pos-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pos-btn:hover:not(:disabled) {
  background: #E8E9EA;
  color: var(--text-primary);
}

.pos-btn:disabled {
  color: var(--disabled-color);
  cursor: not-allowed;
}

.pos-label {
  font-size: 0.875rem;
  font-weight: 500;
  min-width: 32px;
  text-align: center;
}

.btn-check-bid {
  padding: 0.5rem 1rem;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-check-bid:hover {
  background-color: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.spinner-small {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(4, 201, 73, 0.2);
  border-radius: 50%;
  border-top-color: var(--accent-color);
  animation: spin 1s ease-in-out infinite;
  display: inline-block;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive Table layout for Mobile Devices */
@media (max-width: 768px) {
  body {
    padding: 1rem 0.5rem;
  }

  .container {
    padding: 0;
    width: 100%;
    max-width: none;
  }

  .header h1 {
    font-size: 2rem;
  }

  .glass-panel {
    padding: 1.25rem;
  }

  .search-box {
    flex-direction: column;
  }
  .search-box input {
    width: 100%;
  }
  .search-box button {
    width: 100%;
  }

  .table-responsive {
    overflow-x: visible;
    border: none;
    background: transparent;
    box-shadow: none;
  }

  #resultsTable, #trafficTable {
    display: block;
    width: 100%;
    min-width: 0 !important; /* Reset minimum width on mobile card view */
  }

  #resultsTable thead, #trafficTable thead {
    display: none;
  }

  #resultsTable tbody, #trafficTable tbody {
    display: block;
  }

  #resultsTable tr, #trafficTable tr {
    display: block;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    padding: 1.25rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
  }

  #resultsTable tr.main-keyword-row, #trafficTable tr.main-keyword-row {
    border-left: 4px solid var(--accent-color);
    background-color: var(--highlight-bg);
  }

  #resultsTable td, #trafficTable td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    text-align: right;
  }

  #resultsTable td:last-child, #trafficTable td:last-child {
    border-bottom: none;
  }

  /* Display label using pseudo-element with data-label */
  #resultsTable td::before, #trafficTable td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: left;
    margin-right: 1rem;
    white-space: nowrap;
  }

  /* Mobile Header Row styling */
  #resultsTable td.mobile-header-row, #trafficTable td.mobile-header-row {
    display: flex !important;
    justify-content: flex-end;
    padding: 0.5rem 0;
    border-bottom: 1.5px solid var(--border-color);
  }

  #resultsTable td.mobile-header-row::before, #trafficTable td.mobile-header-row::before {
    content: "" !important;
  }

  #resultsTable td.mobile-header-row .val-wrapper, #trafficTable td.mobile-header-row .val-wrapper {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
  }

  #resultsTable td.mobile-header-row .val-pc,
  #resultsTable td.mobile-header-row .val-mobile,
  #trafficTable td.mobile-header-row .val-pc,
  #trafficTable td.mobile-header-row .val-mobile {
    color: var(--text-secondary);
    font-weight: 700;
  }

  .price-legend-label {
    display: none !important;
  }

  /* First cell (Keyword) layout custom styling */
  #resultsTable td[data-label="키워드"], #trafficTable td[data-label="키워드"] {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
  }

  /* Hide sort handle on mobile card view */
  #resultsTable td[data-label="정렬"], #trafficTable td[data-label="정렬"] {
    display: none !important;
  }

  /* Align values horizontally on mobile */
  .val-wrapper {
    flex-direction: row;
    gap: 1.5rem;
    justify-content: flex-end;
    align-items: center;
  }

  .val-pc, .val-mobile {
    width: 75px;
    text-align: right;
    display: inline-block;
  }

  /* Hide empty cells to keep card clean */
  #resultsTable td:empty, #trafficTable td:empty {
    display: none !important;
  }
}

/* --- BUTTON & CHIP STYLES --- */

.btn-secondary {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: var(--panel-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-secondary:hover {
  background-color: var(--bg-color);
  border-color: var(--text-secondary);
}

.rel-keywords-container {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  text-align: left;
}

.rel-keywords-container label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.rel-keywords-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.rel-keyword-btn {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  border-radius: 2rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}

.rel-keyword-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--highlight-bg);
  transform: translateY(-1px);
}

.rel-keyword-btn:active {
  transform: translateY(0);
}

/* --- PUSH LAYOUT STYLE --- */

.layout-wrapper {
  display: flex;
  width: 100vw;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.main-layout-container {
  flex: 1;
  width: 100%;
  transition: margin-right 0.3s ease-in-out;
  padding: 2rem 1rem;
  display: flex;
  justify-content: center;
  overflow-y: auto;
}

/* Desktop layout push when drawer is open */
@media (min-width: 769px) {
  .layout-wrapper.drawer-open .main-layout-container {
    margin-right: 320px;
  }
}

/* --- HISTORY DRAWER SIDEBAR STYLE --- */

.history-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  height: 100vh;
  background: var(--panel-bg);
  border-left: 1px solid var(--border-color);
  box-shadow: -2px 0 10px rgba(0, 0, 0, 0.05);
  z-index: 100;
  transform: translateX(100%);
  transition: transform 0.3s ease-in-out;
  display: flex;
  flex-direction: column;
}

.layout-wrapper.drawer-open .history-drawer {
  transform: translateX(0);
}

.history-drawer-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
}

.history-drawer-header h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.btn-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
}

.btn-close:hover {
  color: var(--error-color);
}

.history-drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
}

.empty-history {
  color: var(--text-secondary);
  text-align: center;
  font-size: 0.875rem;
  margin-top: 2rem;
}

.history-item-card {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
}

.history-item-card:hover {
  border-color: var(--accent-color);
  background-color: var(--highlight-bg);
  transform: translateY(-1px);
}

.history-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-keyword {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.925rem;
}

.history-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.history-delete-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.2s;
}

.history-delete-btn:hover {
  color: var(--error-color);
}

.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.45);
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease-in-out;
}

/* Overlay active on mobile only when drawer is open */
@media (max-width: 768px) {
  .layout-wrapper.drawer-open .drawer-overlay {
    opacity: 1;
    pointer-events: auto;
  }
  
  .history-drawer {
    width: 280px; /* slightly smaller on mobile */
  }
}

/* --- TABS SYSTEM --- */

.tabs-container {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  border: none;
  background: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 0.5rem;
}

.tab-btn:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--accent-color);
  color: white;
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease-out;
}

.tab-content.active-tab {
  display: block !important;
}

/* --- HOVER TOOLTIP POPUP --- */

.hover-tooltip {
  position: absolute;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
  padding: 1rem;
  z-index: 2000;
  font-size: 0.875rem;
  color: var(--text-primary);
  max-width: 320px;
  min-width: 260px;
  pointer-events: none; /* prevents cursor from getting stuck on tooltip */
  transition: opacity 0.15s ease-out;
  text-align: left;
}

.hover-tooltip.hidden {
  display: none !important;
}

.tooltip-header {
  font-weight: 700;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

.tooltip-body table {
  width: 100%;
  border-collapse: collapse;
  min-width: 0 !important;
}

.tooltip-body th, .tooltip-body td {
  padding: 0.4rem 0.25rem;
  font-size: 0.8rem;
  border-bottom: 1px dashed var(--border-color);
  white-space: nowrap;
}

.tooltip-body th {
  color: var(--text-secondary);
  font-weight: 600;
  background: none;
}

.tooltip-footer {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  text-align: right;
}

.tooltip-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  color: var(--text-secondary);
}

.tooltip-error {
  color: var(--error-color);
  text-align: center;
  font-weight: 500;
  padding: 0.5rem 0;
}

/* --- CLIENT SIDE QUEUE PROGRESS POPUP --- */

.queue-progress-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease-out;
}

.queue-progress-popup.visible {
  opacity: 1;
  pointer-events: auto;
}

.popup-box {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  min-width: 240px;
}

.progress-circle-container {
  position: relative;
  width: 50px;
  height: 50px;
}

.spinner-progress {
  width: 44px;
  height: 44px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.popup-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

#queueCount {
  color: var(--accent-color);
  font-size: 1.2rem;
  font-weight: 700;
}

/* --- EXCEL DOWNLOAD BUTTON --- */
.btn-excel {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  background-color: var(--highlight-bg);
  color: var(--accent-hover);
  border: 1px solid var(--accent-color);
  border-radius: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-excel:hover {
  background-color: var(--accent-color);
  color: white;
  transform: translateY(-1px);
}

.btn-excel:active {
  transform: translateY(0);
}

/* --- ROW DELETE BUTTON STYLES --- */

.row-delete-btn {
  background: none;
  border: none;
  font-size: 1.35rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  transition: all 0.2s;
}

.row-delete-btn:hover {
  color: var(--error-color);
  transform: scale(1.2);
}



/* --- LEGEND & HOVER HINT STYLES --- */

.results-header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.price-legend-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.legend-pc {
  color: var(--accent-color);
  font-weight: 700;
}

.legend-mobile {
  color: var(--text-secondary);
  font-weight: 500;
}

.hover-hint-icon {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--accent-color);
  margin-left: 5px;
  cursor: help;
  opacity: 0.65;
  transition: opacity 0.2s, transform 0.2s;
  user-select: none;
}

.hover-hint-icon:hover {
  opacity: 1;
  transform: scale(1.15);
}

.visitor-count-container {
  margin-top: 2rem;
  margin-bottom: 1rem;
  text-align: center;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-color);
  background: var(--card-bg);
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.highlight-count {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0 0.5rem;
}

/* ============================================= */
/* === SIDEBAR NAVIGATION STYLES === */
/* ============================================= */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: var(--panel-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 200;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease-in-out;
}

.sidebar-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.sidebar-logo img {
  height: 32px;
  object-fit: contain;
}

.sidebar-close-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.75rem;
  color: var(--text-secondary);
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem;
}

.sidebar-close-btn:hover {
  color: var(--error-color);
}

.sidebar-menu {
  list-style: none;
  padding: 1rem 0;
  margin: 0;
  flex: 1;
}

.sidebar-menu li {
  margin-bottom: 0.25rem;
}

.sidebar-menu-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.sidebar-menu-item:hover {
  color: var(--accent-color);
  background-color: var(--highlight-bg);
  border-left-color: var(--accent-color);
}

.sidebar-menu-item.active {
  color: var(--accent-color);
  background-color: var(--highlight-bg);
  border-left-color: var(--accent-color);
}

.sidebar-menu-item svg {
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
}

.sidebar-footer p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin: 0;
}

.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.45);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease-in-out;
}

.sidebar-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* === PAGE WRAPPER (main content area pushed by sidebar) === */

.page-wrapper {
  margin-left: 240px;
  min-height: 100vh;
  transition: margin-left 0.3s ease-in-out;
}

/* === MOBILE TOPBAR === */

.mobile-topbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 150;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  align-items: center;
  gap: 0.75rem;
}

.hamburger-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hamburger-btn:hover {
  color: var(--accent-color);
}

.mobile-logo {
  display: flex;
  align-items: center;
}

.mobile-logo img {
  height: 28px;
  object-fit: contain;
}

/* === SCREEN READER ONLY === */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* === SITE FOOTER === */

.site-footer {
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.site-footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0.25rem 0;
}

.site-footer a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ============================================= */
/* === BLOG / HOME PAGE STYLES === */
/* ============================================= */

.blog-layout {
  padding: 2rem 1rem;
  display: flex;
  justify-content: center;
}

.blog-header {
  margin-bottom: 2rem;
  text-align: left;
}

.blog-main-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 0 0 0.5rem 0;
}

.blog-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

/* --- Blog Post Card List --- */

.post-list-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.post-card {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.75rem 2rem;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
}

.post-card:hover {
  border-color: var(--accent-color);
  box-shadow: 0 6px 16px rgba(4, 201, 73, 0.08);
  transform: translateY(-2px);
}

.post-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.post-category {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-color);
  background-color: var(--highlight-bg);
  padding: 0.2rem 0.65rem;
  border-radius: 2rem;
  width: fit-content;
}

.post-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.4;
}

.post-card-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.post-card-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* --- Blog Post Detail --- */

.post-detail-container {
  animation: fadeIn 0.4s ease-out;
}

.post-detail {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 2.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.post-detail-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.4rem;
  background: var(--bg-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 1rem;
}

.btn-back:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.post-detail-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0.75rem 0 0.5rem 0;
  line-height: 1.35;
}

.post-detail-date {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.post-detail-body {
  line-height: 1.85;
  color: var(--text-primary);
}

.post-detail-body h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2rem 0 0.75rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--highlight-bg);
}

.post-detail-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.5rem 0 0.5rem 0;
}

.post-detail-body p {
  margin: 0 0 1.15rem 0;
  font-size: 1rem;
  color: var(--text-primary);
  word-break: keep-all;
}

.post-detail-body pre {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.post-detail-body code {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.9rem;
}

.post-detail-body ul, .post-detail-body ol {
  margin: 0.75rem 0 1rem 1.25rem;
  line-height: 1.8;
}

.post-detail-body li {
  margin-bottom: 0.35rem;
}

/* --- Related Posts --- */

.related-posts {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.related-posts h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 1rem 0;
}

.related-posts-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.related-post-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background: var(--bg-color);
  text-decoration: none;
  transition: all 0.2s;
}

.related-post-link:hover {
  border-color: var(--accent-color);
  background: var(--highlight-bg);
  transform: translateX(4px);
}

.related-post-category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-color);
}

.related-post-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Blog Loading / Error --- */

.blog-loading {
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

.blog-error {
  text-align: center;
  padding: 2rem;
  color: var(--error-color);
  font-size: 0.95rem;
}

/* ============================================= */
/* === SIDEBAR + BLOG MOBILE RESPONSIVE === */
/* ============================================= */

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.sidebar-open {
    transform: translateX(0);
  }

  .sidebar-close-btn {
    display: block;
  }

  .page-wrapper {
    margin-left: 0;
  }

  .mobile-topbar {
    display: flex;
  }

  .blog-layout {
    padding: 1rem 0.5rem;
  }

  .blog-main-title {
    font-size: 1.5rem;
  }

  .post-card {
    padding: 1.25rem;
  }

  .post-card-title {
    font-size: 1.1rem;
  }

  .post-detail {
    padding: 1.5rem;
  }

  .post-detail-title {
    font-size: 1.35rem;
  }

  .post-detail-body h2 {
    font-size: 1.15rem;
  }
}

/* Help Button & Modal Styles */
.btn-help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: var(--card-bg);
  color: var(--text-secondary);
  font-size: 1.25rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
  margin-left: 8px;
}

.btn-help:hover {
  background-color: var(--highlight-bg);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 0.2s ease-in-out;
}

.modal-overlay.hidden {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.modal-container {
  background-color: var(--card-bg);
  border-radius: 12px;
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  transform: scale(1);
  transition: transform 0.2s ease-out;
}

.modal-overlay.hidden .modal-container {
  transform: scale(0.95);
}

.modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-content-scroll {
  padding: 24px;
  overflow-y: auto;
  color: var(--text-primary);
  line-height: 1.6;
}

.modal-content-scroll h3 {
  margin-top: 20px;
  margin-bottom: 10px;
  font-size: 1.1rem;
  color: var(--accent-color);
}

.modal-content-scroll h3:first-child {
  margin-top: 0;
}

.modal-content-scroll p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}