@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');

:root {
  --bg:         #07090f;
  --surface:    #0d1117;
  --surface2:   #161b22;
  --border:     #21262d;
  --border2:    #30363d;
  --primary:    #7c3aed;
  --primary-l:  #a78bfa;
  --blue:       #58a6ff;
  --green:      #3fb950;
  --yellow:     #e3b341;
  --text:       #e6edf3;
  --text2:      #8b949e;
  --text3:      #484f58;
  --sidebar-w:  260px;
  --content-w:  780px;
  --radius:     10px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
}

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

/* ── Layout ─────────────────────────────────────────────────────────────── */

.layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

.sidebar-logo:hover { text-decoration: none; }

.logo-icon {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-l));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
}

.logo-text { font-weight: 700; font-size: 15px; color: var(--text); }
.logo-sub  { font-size: 11px; color: var(--text2); margin-top: 1px; }

.sidebar-nav { padding: 16px 0; flex: 1; }

.nav-section {
  padding: 6px 20px 4px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text3);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  font-size: 13px;
  color: var(--text2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .15s, background .15s;
}

.nav-link:hover { color: var(--text); background: var(--surface2); text-decoration: none; }
.nav-link.active { color: var(--primary-l); border-left-color: var(--primary); background: rgba(124,58,237,.08); }
.nav-link .nav-num { font-size: 11px; color: var(--text3); min-width: 18px; }

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text3);
}

.sidebar-footer a { color: var(--text2); }

/* ── Main content ────────────────────────────────────────────────────────── */

.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
}

.page-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 48px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.page-nav-title { font-size: 13px; font-weight: 600; }
.page-nav-links { display: flex; gap: 16px; margin-left: auto; }
.page-nav-links a { font-size: 12px; color: var(--text2); }
.page-nav-links a:hover { color: var(--text); text-decoration: none; }
.page-nav-links a.current { color: var(--primary-l); }

.content {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 56px 48px 80px;
}

/* ── Document styles ─────────────────────────────────────────────────────── */

.doc-header { margin-bottom: 56px; padding-bottom: 40px; border-bottom: 1px solid var(--border); }

.doc-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124,58,237,.12);
  color: var(--primary-l);
  border: 1px solid rgba(124,58,237,.25);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}

.doc-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text) 60%, var(--primary-l));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.doc-subtitle {
  font-size: 18px;
  color: var(--text2);
  margin-bottom: 24px;
  line-height: 1.5;
}

.doc-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text2);
}

.doc-meta span { display: flex; align-items: center; gap: 4px; }

/* Section headings */

.section { margin-bottom: 56px; scroll-margin-top: 80px; }

h2.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-num {
  font-size: 13px;
  color: var(--primary-l);
  font-weight: 600;
  min-width: 28px;
}

h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 12px;
}

h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text2);
  margin: 20px 0 8px;
  text-transform: uppercase;
  letter-spacing: .05em;
  font-size: 11px;
}

p {
  color: var(--text2);
  margin-bottom: 16px;
}

p strong { color: var(--text); }

/* Abstract */
.abstract {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 48px;
  font-style: italic;
  color: var(--text2);
  font-size: 14px;
  line-height: 1.8;
}

/* Tables */
.table-wrap { overflow-x: auto; margin: 20px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th {
  background: var(--surface2);
  padding: 10px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text2);
  border: 1px solid var(--border);
}

td {
  padding: 10px 16px;
  border: 1px solid var(--border);
  color: var(--text2);
  vertical-align: top;
}

td strong { color: var(--text); }
td:first-child { color: var(--text); font-weight: 500; }

tr:nth-child(even) td { background: rgba(255,255,255,.02); }

/* Code blocks */
pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text);
  margin: 20px 0;
}

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  background: var(--surface2);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--primary-l);
}

pre code { background: none; padding: 0; color: var(--text); }

/* Lists */
ul, ol { padding-left: 24px; margin-bottom: 16px; }
li { color: var(--text2); margin-bottom: 6px; }
li strong { color: var(--text); }

/* Info boxes */
.callout {
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 13.5px;
  display: flex;
  gap: 12px;
}

.callout-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.callout-body { color: var(--text2); }
.callout-body strong { color: var(--text); }

.callout-info    { background: rgba(88,166,255,.08); border: 1px solid rgba(88,166,255,.2); }
.callout-warn    { background: rgba(227,179,65,.08); border: 1px solid rgba(227,179,65,.2); }
.callout-success { background: rgba(63,185,80,.08);  border: 1px solid rgba(63,185,80,.2); }

/* Emission chart */
.emission-bars { margin: 20px 0; }

.era-row {
  display: grid;
  grid-template-columns: 48px 120px 1fr 100px;
  align-items: center;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 12.5px;
}

.era-row:last-child { border-bottom: none; }

.era-num { color: var(--text2); text-align: right; }
.era-reward { color: var(--text); font-family: 'JetBrains Mono', monospace; font-size: 12px; }
.era-bar-wrap { background: var(--surface2); border-radius: 3px; height: 6px; overflow: hidden; }
.era-bar { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--primary), var(--primary-l)); }
.era-pct { color: var(--text2); text-align: right; font-size: 11px; }

/* Spec grid */
.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}

.spec-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
}

.spec-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text2); margin-bottom: 6px; }
.spec-value { font-size: 18px; font-weight: 700; color: var(--text); }
.spec-sub   { font-size: 11px; color: var(--text2); margin-top: 2px; }

/* Roadmap */
.roadmap { margin: 24px 0; }

.phase {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.phase:last-child { border-bottom: none; }

.phase-dot {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.phase-dot.done    { background: rgba(63,185,80,.15);  color: var(--green); border: 2px solid var(--green); }
.phase-dot.active  { background: rgba(124,58,237,.2); color: var(--primary-l); border: 2px solid var(--primary); }
.phase-dot.pending { background: var(--surface2); color: var(--text3); border: 2px solid var(--border); }

.phase-title { font-weight: 600; color: var(--text); margin-bottom: 4px; }
.phase-desc  { font-size: 13px; color: var(--text2); }
.phase-tag   { display: inline-block; font-size: 10px; font-weight: 700; padding: 1px 8px; border-radius: 10px; margin-left: 8px; vertical-align: middle; }
.phase-tag.done    { background: rgba(63,185,80,.15);  color: var(--green); }
.phase-tag.active  { background: rgba(124,58,237,.15); color: var(--primary-l); }
.phase-tag.pending { background: var(--surface2); color: var(--text3); }

/* Mining page hero */
.mining-hero {
  background: linear-gradient(135deg, rgba(124,58,237,.12), rgba(63,185,80,.08));
  border: 1px solid rgba(124,58,237,.2);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 40px;
}

.mining-hero-title { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.mining-hero-sub   { color: var(--text2); margin-bottom: 20px; }

.step-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.step-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.step-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-l);
  opacity: .4;
  line-height: 1;
  margin-bottom: 8px;
}

.step-title { font-weight: 600; margin-bottom: 6px; }
.step-desc  { font-size: 12.5px; color: var(--text2); }

/* FAQ */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-q {
  padding: 14px 20px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  user-select: none;
}

.faq-q:hover { background: var(--surface2); }

.faq-a {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease, padding .25s;
  font-size: 13.5px;
  color: var(--text2);
}

.faq-a.open { max-height: 300px; padding: 16px 20px; }

/* Responsive */
@media (max-width: 900px) {
  .sidebar { display: none; }
  .main    { margin-left: 0; }
  .content { padding: 32px 24px 60px; }
  .spec-grid { grid-template-columns: 1fr; }
  .page-nav { padding: 12px 24px; }
}

@media (max-width: 600px) {
  .doc-title { font-size: 28px; }
  .era-row   { grid-template-columns: 36px 1fr 60px; }
  .era-bar-wrap { display: none; }
}