@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary: #010114; /* Renvo Deep Indigo */
  --bg-secondary: rgba(255, 255, 255, 0.02);
  --bg-tertiary: rgba(255, 255, 255, 0.04);
  --bg-elevated: rgba(255, 255, 255, 0.06);
  --text-primary: #fdfcff;
  --text-secondary: #afabb6;
  --text-muted: #6b6776;
  --text-faint: #454152;
  --accent: #7C5CFC; /* Renvo Purple */
  --accent-hover: #9c82ff;
  --accent-muted: rgba(124, 92, 252, 0.12);
  --border-default: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', Courier, monospace;
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --duration-fast: 0.15s;
  --duration-normal: 0.25s;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
}

/* Custom selection */
::selection {
  background-color: var(--accent-muted);
  color: var(--text-primary);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(124, 92, 252, 0.2);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(124, 92, 252, 0.35);
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}
a:hover {
  color: var(--text-primary);
}

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

/* Navigation bar */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  z-index: 100;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(1, 1, 20, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
}

.nav-container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  font-weight: 500;
}
.nav-logo:hover {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--duration-fast) ease;
}
.nav-link:hover {
  color: var(--text-secondary);
}

/* Shell & Spacing */
.shell {
  min-height: 100vh;
}

.hero-section {
  padding: 112px 0 64px; /* pt-28 pb-16 */
}
@media (min-width: 640px) {
  .hero-section {
    padding: 144px 0 80px; /* sm:pt-36 sm:pb-20 */
  }
}

.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Back Links & Pills */
.breadcrumb-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  transition: color var(--duration-fast) ease;
}
.back-link:hover {
  color: var(--text-muted);
}

.legal-pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  height: 24px;
  padding: 0 10px;
  border-radius: 9999px;
  border: 1px solid rgba(124, 92, 252, 0.2);
  background-color: var(--accent-muted);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 32px;
}

h1 {
  font-size: 32px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-top: 16px;
}
@media (min-width: 640px) {
  h1 {
    font-size: 44px;
  }
}

.updated-date {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 12px;
}

.hero-intro {
  font-size: 15px;
  line-height: 1.625;
  color: var(--text-secondary);
  margin-top: 16px;
}

/* Two-column layout */
.layout-section {
  border-top: 1px solid var(--border-subtle);
}

.content-layout {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px 24px 96px;
  display: flex;
  gap: 64px;
}
@media (min-width: 640px) {
  .content-layout {
    padding: 96px 24px 112px;
  }
}

/* Sidebar navigation */
.sidebar-nav {
  display: none;
  width: 220px;
  flex-shrink: 0;
  position: sticky;
  top: 112px;
  height: fit-content;
  align-self: flex-start;
}
@media (min-width: 1024px) {
  .sidebar-nav {
    display: block;
  }
}

.sidebar-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-faint);
  margin-bottom: 16px;
}

.sidebar-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--border-subtle);
}

.sidebar-link {
  display: block;
  width: 100%;
  text-align: left;
  padding: 4px 0 4px 16px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  margin-left: -1px;
  cursor: pointer;
  background: none;
  border-top: none;
  border-right: none;
  border-bottom: none;
  font-family: inherit;
  transition: all var(--duration-normal) ease;
}
.sidebar-link:hover {
  color: var(--text-secondary);
}
.sidebar-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
}

/* Prose (Right Column) */
.prose {
  min-width: 0;
  max-width: 720px;
  flex: 1;
}

.prose section {
  scroll-margin-top: 112px;
  margin-bottom: 48px;
}
.prose section:last-child {
  margin-bottom: 0;
}

.prose h2 {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.prose h3 {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

.prose p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.prose p:last-child {
  margin-bottom: 0;
}

.prose ul, .prose ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.prose li {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.prose li:last-child {
  margin-bottom: 0;
}

.prose a {
  color: var(--accent);
}
.prose a:hover {
  color: var(--accent-hover);
}

.prose strong {
  font-weight: 600;
  color: var(--text-secondary);
}

.prose .mono {
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}

/* Support Page Styles */
.contact-box {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-default);
  background-color: var(--bg-secondary);
  padding: 24px;
}
@media (min-width: 640px) {
  .contact-box {
    padding: 32px;
  }
}

.contact-flex {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.icon-wrapper {
  display: flex;
  height: 40px;
  width: 40px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid rgba(124, 92, 252, 0.2);
  background-color: var(--accent-muted);
  color: var(--accent);
}

.contact-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.contact-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-top: 6px;
}

.contact-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 8px;
}

/* Accordion */
.accordion-group {
  border-bottom: 1px solid var(--border-subtle);
}
.accordion-group:last-child {
  border-bottom: none;
}

.accordion-trigger {
  display: flex;
  width: 100%;
  cursor: pointer;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  text-align: left;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: color var(--duration-fast) ease;
}
.accordion-trigger:hover {
  color: var(--text-primary);
}

.accordion-trigger svg {
  flex-shrink: 0;
  color: var(--text-faint);
  transition: transform var(--duration-normal) ease, color var(--duration-fast) ease;
}
.accordion-trigger:hover svg {
  color: var(--text-muted);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) cubic-bezier(0.16, 1, 0.3, 1);
}

.accordion-content-inner {
  padding-bottom: 20px;
}
.accordion-content-inner p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* Support Meta Table */
.support-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (min-width: 640px) {
  .support-meta-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-faint);
}

.meta-val {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Footer & Other styling details */
footer {
  border-top: 1px solid var(--border-subtle);
  margin-top: 120px;
}
.footer-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 64px 24px 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.footer-col {
  display: flex;
  flex-direction: column;
}
.footer-brand {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.footer-tagline {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-muted);
  max-width: 200px;
}
.footer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-faint);
  margin-bottom: 16px;
}
.footer-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-menu a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--duration-fast) ease;
}
.footer-menu a:hover {
  color: var(--text-secondary);
}
.footer-bottom {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}
@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    align-items: center;
  }
}
.footer-copyright {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-company {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
}