/* additional_styles.css — styles for /help/ and /about/ pages */

/* ── Design tokens (mirror index.html root variables) ── */
:root {
  --page-bg: hsl(0, 0%, 96%);
  --page-fg: hsl(0, 0%, 4%);
  --card-bg: #ffffff;
  --muted-bg: hsl(0, 0%, 96%);
  --muted-fg: hsl(0, 0%, 45%);
  --border-col: hsl(0, 0%, 83%);
  --primary-col: hsl(0, 0%, 9%);
  --primary-fg: hsl(0, 0%, 98%);
  --secondary-col: hsl(0, 0%, 100%);
  --ring-col: hsl(0, 0%, 80%);
  --accent-green: #97fce4;
  --font-sans: "Plus Jakarta Sans", ui-sans-serif, system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 0rem;
  --transition-base: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode tokens */
@media (prefers-color-scheme: dark) {
  :root {
    --page-bg: hsl(0, 0%, 4%);
    --page-fg: hsl(0, 0%, 98%);
    --card-bg: hsl(0, 0%, 15%);
    --muted-bg: hsl(0, 0%, 15%);
    --muted-fg: hsl(0, 0%, 63%);
    --border-col: hsl(0, 0%, 16%);
    --primary-col: hsl(0, 0%, 90%);
    --primary-fg: hsl(0, 0%, 9%);
    --secondary-col: hsl(0, 0%, 15%);
    --ring-col: hsl(0, 0%, 45%);
  }
}

/* ── Base reset for sub-pages ── */
.subpage *,
.subpage *::before,
.subpage *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.subpage {
  font-family: var(--font-sans);
  background-color: var(--page-bg);
  color: var(--page-fg);
  font-size: 0.875rem;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Layout container ── */
.subpage-container {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 10px;
}

@media (min-width: 48rem) {
  .subpage-container {
    padding-inline: 1rem;
  }
}

/* ── Header (matches original sticky header style) ── */
.subpage-header {
  width: 100%;
  background-color: var(--page-bg);
  border-bottom: 1px solid var(--border-col);
  position: sticky;
  top: 0;
  z-index: 40;
  height: 56px;
  display: flex;
  align-items: center;
}

.subpage-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding-inline: 1rem;
  gap: 0.5rem;
}

.subpage-logo-link {
  display: flex;
  align-items: center;
  background-color: var(--secondary-col);
  transition: background-color var(--transition-base);
  padding: 0 0.125rem;
  text-decoration: none;
}

.subpage-logo-link:hover {
  background-color: var(--ring-col);
}

.subpage-logo-link img {
  height: 28px;
  width: auto;
  display: block;
}

/* ── Navigation links in header (uppercase button style) ── */
.subpage-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subpage-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 400;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--page-fg);
  background-color: var(--secondary-col);
  padding: 0.5rem 0.75rem;
  line-height: 1;
  transition: background-color var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.subpage-nav-link:hover {
  background-color: var(--ring-col);
}

.subpage-nav-link--active {
  background-color: var(--primary-col);
  color: var(--primary-fg);
}

.subpage-nav-link--active:hover {
  background-color: var(--ring-col);
}

/* ── Main content area ── */
.subpage-main {
  padding-top: 1.5rem;
  padding-bottom: 8rem;
  padding-inline: 0;
}

@media (min-width: 40rem) {
  .subpage-main {
    padding-inline: 1rem;
  }
}

/* ── Page title block ── */
.subpage-title-block {
  margin-bottom: 1.75rem;
}

.subpage-title-block h1 {
  font-size: 1.875rem;
  font-weight: 500;
  line-height: 2.5rem;
  color: var(--page-fg);
  font-family: var(--font-sans);
}

.subpage-title-block p {
  font-size: 0.875rem;
  color: var(--muted-fg);
  line-height: 1.375rem;
  margin-top: 0.25rem;
}

/* ── Card wrapper (matches .bg-card p-4) ── */
.subpage-card {
  background-color: var(--card-bg);
  padding: 1rem;
  width: 100%;
}

/* ── Section headings inside content ── */
.subpage-section-heading {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-fg);
  margin-bottom: 0.75rem;
  margin-top: 1.5rem;
  font-family: var(--font-sans);
}

.subpage-section-heading:first-child {
  margin-top: 0;
}

/* ── QA Item (help page) ── */
.qa-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.qa-item {
  border-bottom: 1px solid color-mix(in srgb, var(--border-col) 50%, transparent);
  padding-block: 0.875rem;
}

.qa-item:first-child {
  border-top: 1px solid color-mix(in srgb, var(--border-col) 50%, transparent);
}

.qa-question {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--page-fg);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  font-family: var(--font-sans);
  cursor: default;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.qa-question::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  background-color: var(--primary-col);
  color: var(--primary-fg);
  padding: 0.125rem 0.375rem;
  height: 1.25rem;
  line-height: 1;
  margin-top: 0.0625rem;
}

.qa-answer {
  font-size: 0.8125rem;
  color: var(--muted-fg);
  line-height: 1.5rem;
  padding-left: 1.75rem;
}

.qa-answer a {
  color: var(--page-fg);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.qa-answer a:hover {
  color: var(--muted-fg);
}

/* ── About page sections ── */
.about-section {
  margin-bottom: 2rem;
}

.about-section:last-of-type {
  margin-bottom: 0;
}

.about-section h2 {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-fg);
  margin-bottom: 0.75rem;
  font-family: var(--font-sans);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-col);
}

.about-section p {
  font-size: 0.875rem;
  color: var(--page-fg);
  line-height: 1.5rem;
  margin-bottom: 0.75rem;
}

.about-section p:last-child {
  margin-bottom: 0;
}

.about-section a {
  color: var(--page-fg);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.about-section a:hover {
  color: var(--muted-fg);
}

/* ── Feature/stat grid for about page ── */
.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--border-col);
  border: 1px solid var(--border-col);
  margin-top: 0.75rem;
}

@media (min-width: 48rem) {
  .about-stats-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.about-stat-item {
  background-color: var(--card-bg);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.about-stat-value {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--page-fg);
  font-family: var(--font-mono);
  line-height: 1.4;
}

.about-stat-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-fg);
}

/* ── Tag/badge (matching inline badge style from original) ── */
.subpage-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  height: 1.25rem;
  text-transform: uppercase;
  line-height: 1;
  color: #000;
  white-space: nowrap;
  flex-shrink: 0;
}

.subpage-badge--green {
  background-color: var(--accent-green);
}

.subpage-badge--cyan {
  background-color: rgb(207, 250, 254);
}

.subpage-badge--orange {
  background-color: rgb(255, 237, 213);
}

/* ── Inline highlight text ── */
.subpage-mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

/* ── Home / back button (bottom of page) ── */
.subpage-back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 400;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--page-fg);
  background-color: var(--secondary-col);
  padding: 0.5rem 0.75rem;
  line-height: 1;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background-color var(--transition-base);
  white-space: nowrap;
  margin-top: 2rem;
}

.subpage-back-btn:hover {
  background-color: var(--ring-col);
}

.subpage-back-btn svg {
  width: 0.75rem;
  height: 0.75rem;
}

/* ── Footer (matches original footer layout) ── */
.subpage-footer {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  background-color: var(--page-bg);
  padding-top: 0.5rem;
  padding-inline: 0.5rem;
  width: 100%;
  display: none;
}

@media (min-width: 48rem) {
  .subpage-footer {
    display: block;
  }
}

.subpage-footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--secondary-col);
  margin-bottom: 0.5rem;
  padding-inline: 0.5rem;
}

.subpage-footer-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-block: 0.25rem;
  flex-wrap: wrap;
}

.subpage-footer-links a {
  font-size: 0.8125rem;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--page-fg);
  font-family: var(--font-sans);
}

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

.subpage-footer-links span {
  color: var(--muted-fg);
  font-size: 0.8125rem;
}

.subpage-footer-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-block: 0.25rem;
}

.subpage-footer-meta-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  color: var(--page-fg);
}

.subpage-footer-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subpage-footer-status-dot {
  position: relative;
  display: flex;
  width: 0.5rem;
  height: 0.5rem;
}

.subpage-footer-status-dot::before {
  content: "";
  position: absolute;
  display: inline-flex;
  width: 100%;
  height: 100%;
  border-radius: 9999px;
  background-color: hsl(141.4, 69.16%, 44.51%);
  animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
  opacity: 0.75;
}

.subpage-footer-status-dot::after {
  content: "";
  position: relative;
  display: inline-flex;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 9999px;
  background-color: hsl(141.4, 69.16%, 44.51%);
}

/* ── Divider ── */
.subpage-divider {
  border: none;
  border-top: 1px solid var(--border-col);
  margin-block: 1.5rem;
}

/* ── Internal link row (breadcrumb-style context links) ── */
.subpage-context-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-col);
  font-size: 0.75rem;
  color: var(--muted-fg);
}

.subpage-context-links a {
  font-size: 0.75rem;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--page-fg);
  background-color: var(--secondary-col);
  padding: 0.25rem 0.5rem;
  transition: background-color var(--transition-base);
}

.subpage-context-links a:hover {
  background-color: var(--ring-col);
}

/* ── Table style for structured data (about page) ── */
.subpage-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  margin-top: 0.5rem;
}

.subpage-table th {
  text-align: left;
  font-weight: 500;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-fg);
  padding: 0.375rem 0.75rem;
  border-bottom: 1px solid var(--border-col);
  background-color: var(--card-bg);
}

.subpage-table td {
  padding: 0.375rem 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border-col) 50%, transparent);
  color: var(--page-fg);
  vertical-align: middle;
}

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

/* ── Utility: visually hidden ── */
.subpage-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border-width: 0;
}

/* ── Responsive adjustments ── */
@media (max-width: 39.9375rem) {
  .subpage-title-block h1 {
    font-size: 1.5rem;
    line-height: 2rem;
  }

  .subpage-card {
    padding: 0.75rem;
  }

  .qa-answer {
    padding-left: 1.625rem;
  }
}