:root {
  --bg-primary: #0b0f17;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: rgba(17, 24, 39, 0.75);
  --border-color: #374151;
  --border-accent: #4b5563;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --accent-violet: #8b5cf6;
  --accent-violet-glow: rgba(139, 92, 246, 0.25);
  --accent-gold: #d4af37;
  --accent-gold-glow: rgba(212, 175, 55, 0.2);
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Menlo, Monaco, Consolas, "Courier New", monospace;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 100% 50%, rgba(212, 175, 55, 0.04) 0%, transparent 40%),
              var(--bg-primary);
}

/* Header & Nav */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(11, 15, 23, 0.85);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 28px;
  height: 28px;
  color: var(--accent-violet);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

nav.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

nav.main-nav a:hover {
  color: var(--text-main);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-violet);
  color: #fff;
  box-shadow: 0 2px 10px var(--accent-violet-glow);
}

.btn-primary:hover {
  background: #7c3aed;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}

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

.btn-secondary:hover {
  background: #374151;
  border-color: var(--border-accent);
}

.btn-gold {
  background: rgba(212, 175, 55, 0.15);
  color: var(--accent-gold);
  border-color: rgba(212, 175, 55, 0.35);
}

.btn-gold:hover {
  background: rgba(212, 175, 55, 0.25);
  box-shadow: 0 2px 12px var(--accent-gold-glow);
}

/* Hero Section */
.hero-section {
  padding: 80px 24px 60px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 9999px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: var(--accent-violet);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #fff;
}

.hero-title span.gradient-text {
  background: linear-gradient(135deg, #c4b5fd 0%, #8b5cf6 50%, #d4af37 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.install-command-box {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-main);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.install-command-box button.copy-btn {
  background: transparent;
  border: none;
  color: var(--accent-violet);
  margin-left: 12px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
}

.install-command-box button.copy-btn:hover {
  text-decoration: underline;
}

/* Main Container & Sections */
main.main-content {
  flex: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px 80px;
  width: 100%;
}

section.content-section {
  padding: 60px 0;
  border-top: 1px solid rgba(55, 65, 81, 0.5);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-violet);
  font-weight: 700;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 650px;
  margin: 0 auto;
}

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px;
  transition: transform 0.2s ease, border-color 0.2s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-violet);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--accent-violet);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}

.card-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Workflow Step Diagram */
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 900px) {
  .workflow-steps {
    grid-template-columns: 1fr;
  }
}

.step-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 22px;
  position: relative;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.step-card h4 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Interactive Workbench Styles */
.workbench-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.workbench-tabs {
  display: flex;
  background: #0d131f;
  border-bottom: 1px solid var(--border-color);
}

.wb-tab {
  padding: 14px 24px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-right: 1px solid var(--border-color);
  transition: all 0.15s ease;
}

.wb-tab.active {
  color: #fff;
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--accent-violet);
}

.wb-content {
  display: none;
  padding: 24px;
}

.wb-content.active {
  display: block;
}

.workbench-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
}

@media (max-width: 850px) {
  .workbench-grid {
    grid-template-columns: 1fr;
  }
}

.editor-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.code-editor-area {
  width: 100%;
  height: 240px;
  background: #0b0f17;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #e5e7eb;
  line-height: 1.5;
  resize: vertical;
  outline: none;
}

.code-editor-area:focus {
  border-color: var(--accent-violet);
}

.action-bar {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

select.spirit-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
}

.findings-box {
  min-height: 140px;
  background: #0b0f17;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  font-size: 0.85rem;
}

table.relic-table {
  width: 100%;
  border-collapse: collapse;
}

table.relic-table th, table.relic-table td {
  padding: 6px 10px;
  border-bottom: 1px solid #1f2937;
  text-align: left;
}

table.relic-table th {
  color: var(--text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
}

pre.diff-output-box {
  background: #080c14;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-emerald);
  min-height: 140px;
  max-height: 260px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Terminal Emulator */
.terminal-window {
  background: #080c14;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-height: 380px;
  max-height: 500px;
  display: flex;
  flex-direction: column;
}

.term-topbar {
  background: #111827;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.term-body {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.term-history {
  white-space: pre-wrap;
  margin-bottom: 12px;
  color: #e5e7eb;
}

.term-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.term-prompt {
  color: var(--accent-violet);
  font-weight: bold;
}

input.term-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-family: inherit;
  font-size: inherit;
}

/* CLI Docs Table */
.docs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.docs-table th, .docs-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}

.docs-table th {
  background: rgba(17, 24, 39, 0.7);
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.docs-table code {
  font-family: var(--font-mono);
  color: var(--accent-violet);
  background: rgba(139, 92, 246, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
}

/* FAQ Accordion */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 800px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 22px;
}

.faq-question {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.faq-answer {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* OS Tabs & Installation Component */
.os-tabs-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.os-tabs-header {
  display: flex;
  background: #0d131f;
  border-bottom: 1px solid var(--border-color);
}

.os-tab {
  padding: 12px 24px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-right: 1px solid var(--border-color);
  transition: all 0.15s ease;
}

.os-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.02);
}

.os-tab.active {
  color: #fff;
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--accent-violet);
}

.os-content {
  display: none;
  padding: 24px;
}

.os-content.active {
  display: block;
}

.code-block-wrapper {
  position: relative;
  background: #080c14;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  margin: 12px 0 20px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  overflow-x: auto;
}

.code-block-wrapper pre {
  margin: 0;
  color: #e5e7eb;
}

.code-block-wrapper .copy-block-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.code-block-wrapper .copy-block-btn:hover {
  color: #fff;
  border-color: var(--accent-violet);
}

.notice-banner {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 8px;
  padding: 16px;
  margin: 16px 0;
  color: var(--text-main);
  font-size: 0.9rem;
}

.notice-banner.gold {
  background: rgba(212, 175, 55, 0.08);
  border-color: rgba(212, 175, 55, 0.35);
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 24px;
  background: #080c14;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: #fff;
}