/* ========================================================
   N2SF Security Controls Matrix - Stylesheet
   MITRE ATT&CK inspired layout
   ======================================================== */

:root {
  /* Classification colors */
  --color-c: #E53935;
  --color-c-bg: #FFEBEE;
  --color-s: #FB8C00;
  --color-s-bg: #FFF3E0;
  --color-o: #1E88E5;
  --color-o-bg: #E3F2FD;

  /* Chapter colors */
  --ch1: #1565C0;  /* 권한 */
  --ch2: #00838F;  /* 인증 */
  --ch3: #2E7D32;  /* 분리 및 격리 */
  --ch4: #AD1457;  /* 통제 */
  --ch5: #E65100;  /* 데이터 */
  --ch6: #4527A0;  /* 정보자산 */

  /* UI colors */
  --color-primary: #37474f;
  --color-primary-light: #3949ab;
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #212121;
  --color-text-secondary: #616161;
  --color-border: #e0e0e0;
  --color-hover: #e3f2fd;

  /* Layout */
  --sidebar-width: 240px;
  --header-height: 48px;
  --col-width: 155px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
  font-size: 13px;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.4;
}

a { color: var(--color-primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  padding: 0 20px;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.header-title {
  font-size: 16px;
  font-weight: 700;
  margin-right: 32px;
}

.header-title a {
  color: white;
  display: flex;
  align-items: center;
  gap: 8px;
}
.header-title a:hover { text-decoration: none; opacity: 0.9; }

.header-logo {
  height: 1.2em;
  width: auto;
  margin-top: 1px;
}

.header-nav { display: flex; gap: 4px; }

.header-right { margin-left: auto; }

.header-source {
  color: rgba(255,255,255,0.7);
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 4px;
  transition: background 0.15s;
}

.header-source:hover {
  background: rgba(255,255,255,0.15);
  color: white;
  text-decoration: none;
}

.header-nav a {
  color: rgba(255,255,255,0.8);
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 4px;
  transition: background 0.15s;
}

.header-nav a:hover,
.header-nav a.active {
  background: rgba(255,255,255,0.15);
  color: white;
  text-decoration: none;
}

.header-nav a.nav-download {
  margin-left: 12px;
  border-left: 1px solid rgba(255,255,255,0.3);
  padding-left: 16px;
  font-size: 12px;
}

/* ---- Layout ---- */
.layout {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* No sidebar mode (matrix page) - full viewport layout */
body.no-sidebar .layout {
  flex-direction: column;
  height: calc(100vh - var(--header-height));
  overflow: hidden;
}

body.no-sidebar .content {
  margin-left: 0;
  max-width: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex: 1;
}

body.no-sidebar .footer {
  display: none;
}

/* ---- Sidebar Tree Navigation ---- */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 0;
  overflow-y: auto;
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  font-size: 12px;
}

.sidebar-title {
  padding: 12px 14px 8px;
  font-weight: 700;
  font-size: 11px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--color-border);
}

/* Chapter level */
.tree-chapter {
  border-bottom: 1px solid #f0f0f0;
}

.tree-chapter > summary {
  list-style: none;
  cursor: pointer;
  padding: 7px 14px;
  font-weight: 700;
  font-size: 12px;
  color: var(--color-text);
  user-select: none;
  display: flex;
  align-items: center;
}

.tree-chapter > summary::-webkit-details-marker { display: none; }

.tree-chapter > summary::before {
  content: '▸';
  display: inline-block;
  width: 14px;
  font-size: 10px;
  color: #999;
  transition: transform 0.15s;
}

.tree-chapter[open] > summary::before {
  transform: rotate(90deg);
}

.tree-chapter > summary:hover {
  background: #f5f5f5;
}

/* Group level */
.tree-group {
  margin-left: 10px;
}

.tree-group > summary {
  list-style: none;
  cursor: pointer;
  padding: 4px 8px 4px 4px;
  user-select: none;
  display: flex;
  align-items: center;
}

.tree-group > summary::-webkit-details-marker { display: none; }

.tree-group > summary::before {
  content: '▸';
  display: inline-block;
  width: 12px;
  font-size: 9px;
  color: #bbb;
  flex-shrink: 0;
  transition: transform 0.15s;
}

.tree-group[open] > summary::before {
  transform: rotate(90deg);
}

.tree-group > summary:hover {
  background: #f5f5f5;
  border-radius: 3px;
}

.tree-group > summary.active {
  background: #e8eaf6;
  border-radius: 3px;
}

.tree-group > summary a {
  color: var(--color-text);
  font-size: 12px;
  font-weight: 600;
}

.tree-group > summary a:hover {
  color: var(--color-primary-light);
  text-decoration: none;
}

.tree-group > summary.active a {
  color: var(--color-primary-light);
}

.tree-code {
  color: var(--color-primary-light);
  font-size: 11px;
  margin-right: 2px;
}

/* Control items level */
.tree-controls {
  margin-left: 22px;
  padding: 2px 0;
}

.tree-control {
  display: block;
  padding: 3px 8px;
  font-size: 11px;
  color: var(--color-text-secondary);
  line-height: 1.3;
  border-radius: 3px;
  transition: background 0.1s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree-control:hover {
  background: #f5f5f5;
  color: var(--color-text);
  text-decoration: none;
}

.tree-control.active {
  background: #e8eaf6;
  color: var(--color-primary-light);
  font-weight: 600;
}

.tree-sub-controls {
  margin-left: 12px;
  border-left: 2px solid #e0e0e0;
  padding-left: 0;
}

.tree-sub-control {
  font-size: 10px !important;
  padding: 2px 8px !important;
}

/* ---- Content ---- */
.content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 20px 24px;
  max-width: 1400px;
}

/* ---- Classification Badges ---- */
.badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-right: 2px;
}

.badge-c { background: var(--color-c-bg); color: var(--color-c); border: 1px solid var(--color-c); }
.badge-s { background: var(--color-s-bg); color: var(--color-s); border: 1px solid var(--color-s); }
.badge-o { background: var(--color-o-bg); color: var(--color-o); border: 1px solid var(--color-o); }
.badge-mgmt { background: var(--color-mgmt-bg); color: var(--color-mgmt); border: 1px solid var(--color-mgmt); }
.badge-mgmt-sm {
  font-size: 9px;
  padding: 0 3px;
  border-radius: 2px;
  background: var(--color-mgmt);
  color: white;
  vertical-align: middle;
}

/* ========================================================
   ATT&CK-style Matrix
   ======================================================== */

.matrix-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.matrix-filters {
  display: flex;
  gap: 6px;
  align-items: center;
}

.matrix-filters label {
  font-weight: 600;
  margin-right: 4px;
  color: var(--color-text-secondary);
  font-size: 12px;
}

.filter-btn {
  padding: 4px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 16px;
  background: white;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  transition: all 0.15s;
}

.filter-btn:hover { border-color: #999; }

.filter-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.filter-btn[data-filter="C"].active { background: var(--color-c); border-color: var(--color-c); }
.filter-btn[data-filter="S"].active { background: var(--color-s); border-color: var(--color-s); }
.filter-btn[data-filter="O"].active { background: var(--color-o); border-color: var(--color-o); }

.matrix-count {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* ---- Matrix Top Bar (fixed title + filters) ---- */
.matrix-topbar {
  flex-shrink: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 20px 8px;
  overflow: hidden;
}

.matrix-topbar .page-header {
  margin-bottom: 0;
}

.matrix-topbar-inner {
  max-width: 100%;
}

/* ---- Matrix Grid ---- */
.matrix-scroll {
  flex: 1;
  overflow: auto;
  padding: 0;
}

.matrix-grid {
  display: inline-block;
  min-width: max-content;
}

/* Header rows */
.matrix-header-row {
  display: grid;
  grid-template-columns: repeat(27, var(--col-width));
  gap: 0;
}

/* Chapter header row */
.matrix-chapter-row {
  border-radius: 6px 6px 0 0;
  overflow: hidden;
}

.matrix-chapter-cell {
  padding: 8px 6px;
  text-align: center;
  font-weight: 700;
  font-size: 13px;
  color: white;
  border-right: 2px solid rgba(255,255,255,0.3);
}

.matrix-chapter-cell:last-child { border-right: none; }

/* Chapter colors */
.matrix-chapter-cell:nth-child(1) { background: var(--ch1); }  /* 권한: 4 cols */
.matrix-chapter-cell:nth-child(2) { background: var(--ch2); }  /* 인증: 7 cols */
.matrix-chapter-cell:nth-child(3) { background: var(--ch3); }  /* 분리: 2 cols */
.matrix-chapter-cell:nth-child(4) { background: var(--ch4); }  /* 통제: 7 cols */
.matrix-chapter-cell:nth-child(5) { background: var(--ch5); }  /* 데이터: 4 cols */
.matrix-chapter-cell:nth-child(6) { background: var(--ch6); }  /* 정보자산: 3 cols */

/* Group header row */
.matrix-group-cell {
  padding: 6px 4px;
  text-align: center;
  background: #f5f5f5;
  border-right: 1px solid var(--color-border);
  border-bottom: 2px solid var(--color-border);
}

.matrix-group-cell:last-child { border-right: none; }

.matrix-group-cell a {
  display: block;
  color: var(--color-text);
}

.matrix-group-cell a:hover {
  text-decoration: none;
  color: var(--color-primary-light);
}

.matrix-group-cell .group-name {
  display: block;
  font-weight: 700;
  font-size: 12px;
  line-height: 1.2;
}

.matrix-group-cell .group-sub {
  display: block;
  font-size: 10px;
  color: var(--color-text-secondary);
  margin-top: 1px;
}

.matrix-group-cell .group-meta {
  display: block;
  font-size: 10px;
  color: #999;
  margin-top: 2px;
}

/* Body: technique columns */
.matrix-body-row {
  display: grid;
  grid-template-columns: repeat(27, var(--col-width));
  gap: 0;
  align-items: start;
}

.matrix-column {
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
  min-height: 100px;
}

.matrix-column:last-child { border-right: none; }

.matrix-column.column-empty {
  background: transparent;
  min-height: 0;
  border-right-color: transparent;
}

.matrix-group-cell.column-empty {
  opacity: 0.3;
}

/* Individual cell (technique) */
.matrix-cell {
  display: block;
  padding: 5px 6px;
  border-bottom: 1px solid #f0f0f0;
  transition: background 0.1s;
  color: var(--color-text);
  cursor: pointer;
}

.matrix-cell:hover {
  background: var(--color-hover);
  text-decoration: none;
}

.matrix-cell .cell-name {
  display: block;
  font-size: 11px;
  line-height: 1.3;
}

.matrix-cell .cell-id {
  display: block;
  font-size: 10px;
  color: #999;
  margin-top: 1px;
}

/* Parent-child grouping (ATT&CK style) */
.matrix-cell.has-children .cell-count {
  font-size: 10px;
  color: #999;
}

.matrix-sub-group {
  border-left: 3px solid #bdbdbd;
  margin-left: 6px;
}

.matrix-sub-group .matrix-sub-cell {
  padding-left: 8px;
}

.matrix-sub-group .matrix-sub-cell .cell-name {
  font-size: 10px;
}

.matrix-sub-group .matrix-sub-cell .cell-id {
  font-size: 9px;
}

.matrix-cell.hidden { display: none; }

.matrix-sub-group.hidden { display: none; }

/* ========================================================
   Group Detail Page
   ======================================================== */
.page-header {
  margin-bottom: 20px;
}

.page-header h1 {
  font-size: 24px;
  color: var(--color-primary);
  margin: 0 0 6px 0;
}

.page-header .subtitle {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.powered-by {
  margin: 2px 0 12px;
  font-size: 11px;
  color: #999;
}

.powered-by a {
  color: inherit;
  text-decoration: none;
  font-weight: 800;
}

.powered-by a:hover {
  text-decoration: underline;
}

.section {
  background: var(--color-surface);
  border-radius: 6px;
  border: 1px solid var(--color-border);
  padding: 16px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 10px 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}

.definition-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

/* ---- Controls Table ---- */
.controls-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.controls-table th {
  background: var(--color-primary);
  color: white;
  padding: 8px 10px;
  text-align: left;
  font-weight: 600;
  position: sticky;
  top: 0;
}

.controls-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.controls-table tr:hover td {
  background: var(--color-hover);
}

.controls-table .id-cell {
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-primary-light);
}

.controls-table .sub-control td:first-child { padding-left: 28px; }
.controls-table .sub-control { background: #fafafa; }

/* ---- Implementation Examples ---- */
.impl-example { margin-bottom: 14px; }

.impl-example-title {
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
}

.impl-example-details {
  padding-left: 20px;
  margin: 0;
}

.impl-example-details li {
  margin-bottom: 3px;
  line-height: 1.6;
}

/* ---- Technology Summary Table ---- */
.tech-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.tech-table th {
  background: #455a64;
  color: white;
  padding: 8px 10px;
  text-align: left;
}

.tech-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
}

.tech-table tr:hover td { background: var(--color-hover); }

/* ---- Control Detail Page ---- */
.control-meta {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 6px 14px;
  margin-bottom: 14px;
}

.control-meta dt {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.control-meta dd { margin: 0; }

.related-controls {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.related-control-link {
  display: inline-block;
  padding: 4px 10px;
  background: #e8eaf6;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}

.related-control-link:hover {
  background: #c5cae9;
  text-decoration: none;
}

/* ---- Search & Filter ---- */
.search-box {
  width: 100%;
  max-width: 400px;
  padding: 8px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 12px;
  transition: border-color 0.15s;
}

.search-box:focus {
  outline: none;
  border-color: var(--color-primary-light);
}

/* ---- Stats bar ---- */
.stats-bar {
  display: flex;
  gap: 20px;
  padding: 10px 16px;
  background: var(--color-surface);
  border-radius: 6px;
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
}

.stat-item { text-align: center; }

.stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary-light);
}

.stat-label {
  font-size: 11px;
  color: var(--color-text-secondary);
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  gap: 6px;
  align-items: center;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.breadcrumb a { color: var(--color-primary-light); }
.breadcrumb .sep { color: #ccc; }

/* ---- Footer ---- */
.footer {
  text-align: center;
  padding: 16px;
  color: var(--color-text-secondary);
  font-size: 11px;
  border-top: 1px solid var(--color-border);
  margin-top: 30px;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .sidebar { display: none; }
  .content { margin-left: 0; }
}

@media (max-width: 768px) {
  .header {
    height: auto;
    min-height: var(--header-height);
    flex-wrap: wrap;
    padding: 6px 12px;
    gap: 4px;
  }

  .header-title {
    font-size: 14px;
    margin-right: auto;
  }

  .header-right {
    order: 2;
    margin-left: 0;
  }

  .header-source {
    font-size: 11px;
    padding: 3px 8px;
  }

  .header-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 4px;
  }

  .header-nav a {
    font-size: 12px;
    padding: 4px 8px;
  }

  .header-nav a.nav-download {
    margin-left: 8px;
    padding-left: 12px;
    font-size: 11px;
  }

  .layout {
    margin-top: 80px;
  }

  body.no-sidebar .layout {
    height: calc(100vh - 80px);
  }

  /* Matrix topbar compact */
  .matrix-topbar {
    padding: 6px 12px 4px;
  }

  .matrix-topbar .page-header h1 {
    font-size: 15px !important;
  }

  .matrix-topbar .page-header .subtitle {
    font-size: 11px !important;
    margin: 2px 0 0 !important;
  }

  .matrix-topbar .page-header {
    margin-bottom: 4px !important;
  }

  .matrix-toolbar {
    margin-bottom: 0;
  }

  .matrix-filters label {
    display: none;
  }

  .filter-btn {
    padding: 3px 10px;
    font-size: 11px;
  }

  .matrix-count {
    font-size: 11px;
  }

  .hide-mobile {
    display: none;
  }

  /* Content padding */
  .content {
    padding: 12px;
  }

  .page-header h1 {
    font-size: 18px;
  }

  .page-header .subtitle {
    font-size: 12px;
  }

  .section {
    padding: 12px;
  }

  .section-title {
    font-size: 14px;
  }

  /* Breadcrumb wrap */
  .breadcrumb {
    flex-wrap: wrap;
    font-size: 11px;
  }

  /* Control detail meta - single column */
  .control-meta {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .control-meta dt {
    margin-top: 8px;
    font-size: 11px;
    color: #999;
  }

  .control-meta dt:first-child {
    margin-top: 0;
  }

  /* ---- Table → Card layout (mobile) ---- */
  .controls-table thead {
    display: none;
  }

  .controls-table,
  .controls-table tbody {
    display: block;
  }

  .controls-table tr {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 10px 12px;
    margin-bottom: 8px;
  }

  .controls-table tr:hover td {
    background: none;
  }

  .controls-table td {
    display: block;
    padding: 0;
    border: none;
  }

  .controls-table .id-cell {
    font-size: 14px;
    margin-bottom: 4px;
  }

  /* Sub-control card indent */
  .controls-table .sub-control {
    margin-left: 16px;
    border-left: 3px solid #bdbdbd;
    background: #fafafa;
  }

  .controls-table .sub-control td:first-child {
    padding-left: 0;
  }

  /* Description cell */
  .controls-table td:nth-last-child(2) {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin: 4px 0;
    line-height: 1.5;
  }

  /* Badge cell - last child */
  .controls-table td:last-child {
    margin-top: 6px;
  }

  /* Tech table - also card style */
  .tech-table thead { display: none; }
  .tech-table, .tech-table tbody { display: block; }
  .tech-table tr {
    display: block;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 8px 12px;
    margin-bottom: 6px;
  }
  .tech-table td {
    display: block;
    padding: 2px 0;
    border: none;
  }
  .tech-table td:first-child {
    font-weight: 600;
    font-size: 12px;
    color: var(--color-text-secondary);
  }
  .tech-table tr:hover td { background: none; }

  /* Search box full width */
  .search-box {
    max-width: 100%;
  }

  /* Related controls wrap */
  .related-controls {
    gap: 4px;
  }

  .related-control-link {
    font-size: 11px;
    padding: 3px 8px;
  }
}