*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* -- HEADER -- */
header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 0 48px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 200;
}

header img {
  height: 38px;
  width: auto;
}

header nav {
  display: flex;
  gap: 28px;
  align-items: center;
}
header nav a {
  color: var(--muted);
  text-decoration: none;
  font-family: var(--heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: color 0.15s;
}
header nav a:hover {
  color: var(--navy);
}
header nav a.active {
  color: var(--navy);
  border-bottom: 2px solid var(--teal);
  padding-bottom: 2px;
}

.nav-dropdown {
  position: relative;
}
.nav-dropdown > span {
  color: var(--muted);
  font-family: var(--heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.15s;
}
.nav-dropdown > span::after {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-left: 5px;
  vertical-align: middle;
  transition: transform 0.15s;
}
.nav-dropdown:hover > span {
  color: var(--navy);
}
.nav-dropdown:hover > span::after {
  transform: rotate(180deg);
}
.nav-dropdown.active > span {
  color: var(--navy);
  border-bottom: 2px solid var(--teal);
  padding-bottom: 2px;
}
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  min-width: 200px;
  padding: 6px 0;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.15s,
    visibility 0.15s;
  z-index: 300;
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
}
.nav-dropdown-menu a {
  display: block;
  padding: 10px 18px;
  color: var(--muted) !important;
  font-size: 0.825rem !important;
  border-bottom: none !important;
  transition: background 0.1s;
}
.nav-dropdown-menu a:hover {
  background: var(--bg);
  color: var(--navy) !important;
}
.nav-dropdown-menu a.active {
  color: var(--navy) !important;
  font-weight: 600 !important;
}

/* -- LAYOUT: SIDEBAR + MAIN -- */
.page-layout {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* -- SIDEBAR -- */
.sidebar {
  width: 260px;
  background: var(--card);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 68px;
  height: calc(100vh - 68px);
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar-brand {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: var(--navy);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.brand-icon::before {
  content: "";
  position: absolute;
  width: 16px;
  height: 2px;
  background: var(--hd-off-white); /* on a dark bar - intentionally fixed */
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-20deg);
  box-shadow:
    0 -5px 0 #fff,
    0 5px 0 #fff;
}

.brand-name {
  font-family: var(--heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--navy);
  line-height: 1.2;
}

.brand-sub {
  font-size: 10px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.version-badge {
  font-family: var(--mono);
  font-size: 10px;
  background: var(--teal-dim);
  color: var(--teal);
  border: 1px solid rgba(70, 172, 185, 0.3);
  border-radius: 4px;
  padding: 2px 7px;
  margin-left: auto;
}

.nav-section {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.nav-section-title {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 12px 20px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 400;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--sans);
}

.nav-item:hover {
  color: var(--text);
  background: var(--bg);
}

.nav-item.active {
  color: var(--navy);
  background: rgba(66, 91, 121, 0.06);
  border-right: 2px solid var(--teal);
  font-weight: 500;
}

.nav-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.4;
  flex-shrink: 0;
}

.nav-item.active .nav-dot {
  opacity: 1;
}

.nav-item.nav-sub {
  padding-left: 40px;
  font-size: 12px;
}

.nav-item.nav-sub .nav-dot {
  width: 4px;
  height: 4px;
}

.nav-method {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  padding: 2px 5px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.method-get {
  background: var(--blue-bg);
  color: var(--blue);
}
.method-post {
  background: var(--green-bg);
  color: var(--green);
}
.method-put {
  background: var(--yellow-bg);
  color: var(--yellow);
}
.method-del {
  background: var(--red-bg);
  color: var(--red);
}

/* -- MAIN CONTENT -- */
.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* -- TOPBAR TABS -- */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 48px;
  display: flex;
  align-items: center;
  gap: 24px;
  position: sticky;
  top: 68px;
  z-index: 100;
}

.topbar-tab {
  font-family: var(--heading);
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  padding: 4px 0;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  background: none;
  transition: all 0.15s;
}

.topbar-tab:hover {
  color: var(--navy);
}

.topbar-tab.active {
  color: var(--navy);
  border-bottom-color: var(--teal);
}

.topbar-divider {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 4px;
}

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.region-selector {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: border-color 0.15s;
}

.region-selector:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.dl-group {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
}
.dl-group-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.dl-group-buttons {
  display: flex;
  gap: 4px;
}
.dl-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition:
    border-color 0.15s,
    color 0.15s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.dl-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.dl-btn svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

[id] {
  scroll-margin-top: 130px;
}

/* -- CONTENT AREAS -- */
.content-area {
  display: none;
  flex: 1;
}
.content-area.visible {
  display: block;
}

/* -- OVERVIEW -- */
.overview-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 32px 80px;
}

.hero-section {
  margin-bottom: 56px;
}

.hero-tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--teal);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-tag::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--teal);
}

.hero-title {
  font-family: var(--heading);
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--navy);
}

.hero-title span {
  color: var(--teal);
}

.hero-desc {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 580px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.info-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  box-shadow: var(--shadow);
  transition: border-color 0.2s;
}

.info-card:hover {
  border-color: var(--border-strong);
}

.info-card-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.info-card-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}

.info-card-value small {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
}

.section-block {
  margin-bottom: 48px;
}

.section-block h2 {
  font-family: var(--heading);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.section-block .sub {
  color: var(--muted);
  margin-bottom: 20px;
  font-size: 14px;
}

.section-block h3 {
  font-family: var(--heading);
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin: 24px 0 8px;
}

.section-block h3 + p {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 10px;
}

.info-card-link {
  font-size: 13px;
}

.info-card-link a {
  color: var(--blue);
  text-decoration: none;
}

.steps {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
  transition: background 0.15s;
}

.step:last-child {
  border-bottom: none;
}
.step:hover {
  background: var(--bg);
}

.step-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--teal);
  background: var(--teal-dim);
  border: 1px solid rgba(70, 172, 185, 0.3);
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-content h4 {
  font-family: var(--heading);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}

.step-content p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.code-block {
  background: var(--navy-darker);
  border: 1px solid var(--navy-dark);
  border-radius: 8px;
  padding: 20px 24px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  overflow-x: auto;
  position: relative;
  color: #e8edf2;
  white-space: pre;
}

.code-block .comment {
  color: #6a7a8a;
}
.code-block .keyword {
  color: #b09aff;
}
.code-block .string {
  color: #6ec98a;
}
.code-block .variable {
  color: #6ab0f3;
}
.code-block .method {
  color: #e8a64a;
}
.code-block .prop {
  color: #f0c66a;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--mono);
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.05em;
}

.copy-btn:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.region-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.region-table th {
  background: var(--bg);
  padding: 10px 16px;
  text-align: left;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.region-table td {
  padding: 12px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
}

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

.region-table td code {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--blue);
}

.region-tag {
  font-family: var(--mono);
  font-size: 10px;
  background: var(--blue-bg);
  color: var(--blue);
  border: 1px solid rgba(53, 116, 184, 0.2);
  padding: 2px 7px;
  border-radius: 3px;
}

.callout {
  background: var(--teal-dim);
  border: 1px solid rgba(70, 172, 185, 0.3);
  border-left: 3px solid var(--teal);
  border-radius: 0 6px 6px 0;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.callout strong {
  color: var(--navy);
}

/* -- METRICS TAB -- */
.metrics-wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}
.metrics-header {
  margin-bottom: 32px;
}
.metrics-header code {
  font-family: var(--mono);
  background: var(--blue-bg);
  color: var(--blue);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}
.metrics-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  align-items: center;
}
#metrics-search {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-family: var(--sans);
}
#metrics-search:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-bg);
}
.metrics-type-select {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  font-family: var(--sans);
  cursor: pointer;
  min-width: 200px;
}
.metrics-type-select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-bg);
}
.metrics-clear-btn {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}
.metrics-clear-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
}
.hidden {
  display: none !important;
}
#metrics-filter-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
#metrics-filter-chips:empty {
  margin-bottom: 0;
}
.metrics-filter-chip {
  background: var(--blue-bg);
  color: var(--blue);
  border: 1px solid var(--blue);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 500;
}
.metrics-summary {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 20px;
}
.metrics-empty {
  color: var(--muted);
  padding: 32px 0;
  text-align: center;
  font-size: 14px;
}
.metrics-group {
  margin-bottom: 36px;
}
.metrics-group-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.metrics-group-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}
.metrics-list {
  display: grid;
  gap: 10px;
}
.metric-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.metric-header {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.metric-id {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--blue-bg);
  color: var(--blue);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 500;
}
.metric-units {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}
.metric-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 4px;
}
.metric-description {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}
.metric-also-in {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}
.metric-also-in-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  font-weight: 600;
  margin-right: 4px;
}
.type-badge {
  font-size: 11px;
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}
mark.metrics-match {
  background: var(--blue-bg);
  color: var(--blue);
  padding: 0 2px;
  border-radius: 2px;
}

/* -- CHANGELOG -- */
.changelog-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 32px 80px;
}

.changelog-entry {
  display: flex;
  gap: 24px;
  margin-bottom: 40px;
}

.changelog-date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  width: 80px;
  flex-shrink: 0;
  padding-top: 2px;
}

.changelog-line {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.changelog-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--teal);
  background: var(--bg);
  flex-shrink: 0;
  margin-top: 4px;
}

.changelog-connector {
  width: 1px;
  flex: 1;
  background: var(--border);
  min-height: 40px;
}

.changelog-content {
  flex: 1;
  padding-bottom: 12px;
}

.changelog-version {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 8px;
}

.changelog-content h4 {
  font-family: var(--heading);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.changelog-content p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.change-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 9px;
  padding: 2px 7px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-right: 6px;
  margin-bottom: 6px;
}

.tag-updated {
  background: var(--yellow-bg);
  color: var(--yellow);
  border: 1px solid rgba(184, 134, 11, 0.25);
}
.tag-added {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid rgba(45, 157, 94, 0.25);
}
.tag-removed {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid rgba(192, 57, 43, 0.25);
}
.tag-fixed {
  background: var(--blue-bg);
  color: var(--blue);
  border: 1px solid rgba(53, 116, 184, 0.25);
}

/* -- FOOTER -- */
footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
  padding: 28px 24px;
  font-size: 0.8rem;
}

footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  margin: 0 12px;
  transition: color 0.15s;
}
footer a:hover {
  color: #fff;
}
.footer-links {
  margin-bottom: 8px;
}

/* -- SCROLLBAR -- */
.sidebar::-webkit-scrollbar {
  width: 4px;
}
.sidebar::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* -- RESPONSIVE -- */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  header {
    padding: 0 20px;
  }
  header nav {
    display: none;
  }
  .topbar {
    padding: 0 16px;
  }
  .overview-wrap {
    padding: 32px 16px 60px;
  }
  .info-grid {
    grid-template-columns: 1fr;
  }
}