/* ==========================================================================
   KASPA GUIDE — Premium Dark Theme
   Base: #0d1117 · Accent: #f0b90b → #ff8c00 (Kaspa orange/gold)
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  --bg:            #0d1117;
  --bg-elev:       #161b22;
  --bg-elev-2:     #1c2129;
  --border:        #30363d;
  --border-strong: #3d444d;

  --accent:        #f0b90b;
  --accent-2:      #ff8c00;
  --accent-grad:   linear-gradient(135deg, #f0b90b 0%, #ffb700 45%, #ff8c00 100%);
  --accent-soft:   rgba(240, 185, 11, 0.1);
  --accent-line:   rgba(240, 185, 11, 0.4);

  --text:        #e6edf3;
  --text-muted:  #8b949e;
  --text-dim:    #6e7681;

  --danger:  #f85149;
  --success: #3fb950;

  --radius:      12px;
  --radius-sm:   10px;
  --radius-pill: 999px;

  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 8px 30px rgba(240, 185, 11, 0.22);

  --transition: 0.2s ease;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Cascadia Code",
               Consolas, "Roboto Mono", monospace;
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Inter", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;

  /* Layered gradient background — subtle orange/gold radial glows */
  background-image:
    radial-gradient(1200px 620px at 12% -8%,  rgba(240, 185, 11, 0.13), transparent 60%),
    radial-gradient(900px  520px at 88% -4%,  rgba(255, 140, 0, 0.11),  transparent 55%),
    radial-gradient(1100px 720px at 50% 120%, rgba(240, 185, 11, 0.07), transparent 60%),
    radial-gradient(700px  460px at 80% 70%,  rgba(255, 140, 0, 0.05),  transparent 55%);
  background-attachment: fixed;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3 {
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  margin-bottom: 1rem;
  /* Gradient text effect */
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 2.25rem 0 1rem;
}

h3 {
  font-size: 1.25rem;
  margin: 1.5rem 0 0.75rem;
}

p {
  margin: 0 0 1rem;
  color: var(--text);
}
p:last-child { margin-bottom: 0; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}
a:hover {
  color: var(--accent-2);
  text-decoration: underline;
}

ul {
  margin: 0 0 1rem 1.4rem;
}
li {
  margin-bottom: 0.45rem;
}
li::marker { color: var(--accent); }

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: #ffd35c;
  background: rgba(240, 185, 11, 0.1);
  border: 1px solid rgba(240, 185, 11, 0.22);
  border-radius: 6px;
  padding: 0.15em 0.45em;
}

::selection {
  background: rgba(240, 185, 11, 0.3);
  color: #fff;
}

/* --------------------------------------------------------------------------
   4. Layout
   -------------------------------------------------------------------------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 2.5rem 0;
}

/* --------------------------------------------------------------------------
   5. Nav bar — glassmorphism
   -------------------------------------------------------------------------- */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.9rem 1.5rem;
  background: rgba(13, 17, 23, 0.72);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid rgba(240, 185, 11, 0.22);
  box-shadow: 0 1px 0 rgba(240, 185, 11, 0.08),
              0 10px 28px rgba(0, 0, 0, 0.45);
}

.nav-bar a {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.35rem 0.5rem;
  transition: color var(--transition);
}
.nav-bar a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   6. Logo
   -------------------------------------------------------------------------- */
.logo {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  text-decoration: none;
}
.logo a { color: inherit; text-decoration: none; }

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
  padding: 4.5rem 1.5rem 3rem;
  text-align: center;
}

.hero p {
  max-width: 660px;
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* --------------------------------------------------------------------------
   8. Card system (shared)
   -------------------------------------------------------------------------- */
.card,
.milestone,
.faq-item,
.step-box,
.tier-card,
.pillar-card,
.path-card,
.method-card,
.wallet-card,
.ecosystem-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition),
              border-color var(--transition),
              box-shadow var(--transition);
}

.card:hover,
.milestone:hover,
.faq-item:hover,
.step-box:hover,
.tier-card:hover,
.pillar-card:hover,
.path-card:hover,
.method-card:hover,
.wallet-card:hover,
.ecosystem-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-glow);
}

/* Compact inner headings inside cards */
.milestone h3, .faq-item h3, .step-box h3, .tier-card h3,
.pillar-card h3, .path-card h3, .method-card h3,
.wallet-card h3, .ecosystem-card h3 {
  margin: 0 0 0.5rem;
}

.milestone p, .faq-item p, .step-box p, .tier-card p,
.pillar-card p, .path-card p, .method-card p,
.wallet-card p, .ecosystem-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   9. Callout boxes (highlight / warning / success)
   -------------------------------------------------------------------------- */
.highlight-box,
.warning-box,
.success-box {
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.highlight-box {
  border-left-color: var(--accent);
  background: rgba(240, 185, 11, 0.07);
}

.warning-box {
  border-left-color: var(--danger);
  background: rgba(248, 81, 73, 0.07);
}
.warning-box strong, .warning-box b { color: #ff8c78; }

.success-box {
  border-left-color: var(--success);
  background: rgba(63, 185, 80, 0.07);
}
.success-box strong, .success-box b { color: #5ed17a; }

.highlight-box strong, .highlight-box b { color: var(--accent); }

/* --------------------------------------------------------------------------
   10. Milestone & phase timeline
   -------------------------------------------------------------------------- */
.milestone {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.milestone::before {
  content: "";
  flex-shrink: 0;
  width: 12px;
  height: 12px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--accent-grad);
  box-shadow: 0 0 12px rgba(240, 185, 11, 0.6);
}

.phase {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* --------------------------------------------------------------------------
   11. Status badges
   -------------------------------------------------------------------------- */
.status-done,
.status-next,
.status-future {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border: 1px solid transparent;
}

.status-done {
  color: var(--success);
  border-color: rgba(63, 185, 80, 0.4);
  background: rgba(63, 185, 80, 0.1);
}

.status-next {
  color: var(--accent);
  border-color: rgba(240, 185, 11, 0.4);
  background: rgba(240, 185, 11, 0.1);
  box-shadow: 0 0 14px rgba(240, 185, 11, 0.16);
}

.status-future {
  color: var(--text-dim);
  border-color: var(--border);
  background: rgba(110, 118, 129, 0.1);
}

/* --------------------------------------------------------------------------
   12. FAQ items (CSS-only plus icon)
   -------------------------------------------------------------------------- */
.faq-item {
  cursor: pointer;
  margin-bottom: 0.9rem;
}

.faq-item h3 {
  position: relative;
  margin: 0;
  padding-right: 44px;
  cursor: pointer;
}

/* Horizontal bar */
.faq-item h3::before,
/* Vertical bar */
.faq-item h3::after {
  content: "";
  position: absolute;
  top: 50%;
  background: var(--accent);
  border-radius: 2px;
  transition: transform var(--transition), background var(--transition);
}

.faq-item h3::before {
  right: 6px;
  width: 18px;
  height: 2px;
  transform: translateY(-50%);
}

.faq-item h3::after {
  right: 14px;
  width: 2px;
  height: 18px;
  transform: translateY(-50%);
}

/* On hover, collapse the vertical bar into a minus hint */
.faq-item:hover h3::after {
  transform: translateY(-50%) rotate(90deg);
  background: var(--accent-2);
}

/* --------------------------------------------------------------------------
   13. Related links
   -------------------------------------------------------------------------- */
.related-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.related-links a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 600;
  transition: transform var(--transition),
              border-color var(--transition),
              box-shadow var(--transition),
              color var(--transition);
}

.related-links a:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: var(--shadow-glow);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   14. Article & site footers
   -------------------------------------------------------------------------- */
.article-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer-extra {
  margin-top: 4rem;
  padding: 2rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.85rem;
}

.site-footer-extra a { color: var(--accent); }

/* --------------------------------------------------------------------------
   15. Tags & badges
   -------------------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(240, 185, 11, 0.3);
  transition: background var(--transition), border-color var(--transition);
}
.tag:hover {
  background: rgba(240, 185, 11, 0.16);
  border-color: var(--accent-line);
}

.updated-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent);
  background: rgba(240, 185, 11, 0.08);
  border: 1px solid rgba(240, 185, 11, 0.45);
  box-shadow: 0 0 16px rgba(240, 185, 11, 0.2),
              inset 0 0 12px rgba(240, 185, 11, 0.06);
}

/* --------------------------------------------------------------------------
   16. Steps
   -------------------------------------------------------------------------- */
.step-box {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 0.5rem;
  border-radius: 50%;
  background: var(--accent-grad);
  color: #0d1117;
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 0 16px rgba(240, 185, 11, 0.4);
}

/* --------------------------------------------------------------------------
   17. Tiers, pillars, paths, methods, wallets, ecosystem
   -------------------------------------------------------------------------- */
.tier-card {
  position: relative;
  overflow: hidden;
}

.tier-tag {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.22rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  background: var(--accent-grad);
  color: #0d1117;
  box-shadow: 0 0 14px rgba(240, 185, 11, 0.3);
}

.pillar-card,
.path-card,
.method-card,
.wallet-card,
.ecosystem-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.path-tag,
.path-tag-now {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  margin-bottom: 0.5rem;
  padding: 0.2rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

.path-tag {
  color: var(--text-muted);
  background: rgba(110, 118, 129, 0.12);
  border: 1px solid var(--border);
}

.path-tag-now {
  color: #0d1117;
  background: var(--accent-grad);
  border: 1px solid transparent;
  box-shadow: 0 0 16px rgba(240, 185, 11, 0.4);
}

/* --------------------------------------------------------------------------
   18. Cluster navigation
   -------------------------------------------------------------------------- */
.cluster-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 1.25rem 0;
}

.cluster-nav a {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  transition: color var(--transition),
              border-color var(--transition),
              background var(--transition),
              transform var(--transition);
}
.cluster-nav a:hover {
  color: var(--accent);
  border-color: var(--accent-line);
  background: var(--accent-soft);
  transform: translateY(-1px);
  text-decoration: none;
}

.cluster-sep {
  color: var(--text-dim);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   19. Winner coin badge
   -------------------------------------------------------------------------- */
.winner-coin {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #f0b90b, #ffb700 45%, #ff8c00);
  color: #0d1117;
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: 0 4px 18px rgba(240, 185, 11, 0.45);
}

/* --------------------------------------------------------------------------
   20. Tables
   -------------------------------------------------------------------------- */
table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.95rem;
}

th {
  text-align: left;
  padding: 0.85rem 1rem;
  background: linear-gradient(180deg, rgba(240, 185, 11, 0.15), rgba(240, 185, 11, 0.03));
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid rgba(240, 185, 11, 0.32);
}

td {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border);
  color: var(--text);
}

tbody tr {
  transition: background var(--transition);
}

tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}

tbody tr:hover {
  background: rgba(240, 185, 11, 0.07);
}

/* --------------------------------------------------------------------------
   21. Buttons
   -------------------------------------------------------------------------- */
.btn,
.pay-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent-grad);
  color: #0d1117;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(240, 185, 11, 0.3);
  transition: transform var(--transition),
              box-shadow var(--transition),
              filter var(--transition);
}

.btn:hover,
.pay-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(240, 185, 11, 0.45);
  filter: brightness(1.06);
  color: #0d1117;
  text-decoration: none;
}

.btn:active,
.pay-btn:active {
  transform: translateY(0);
}

.pay-btn {
  padding: 0.95rem 1.9rem;
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   22. Focus visibility (accessibility)
   -------------------------------------------------------------------------- */
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
.pay-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}


/* --------------------------------------------------------------------------
   22b. Related guides (site-wide footer block)
   -------------------------------------------------------------------------- */
.related-guides {
  margin: 2.5rem auto;
  max-width: 820px;
  padding: 1.25rem 1.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.related-guides h2 {
  font-size: 1.15rem;
  margin: 0 0 0.75rem;
  color: var(--text);
}
.related-guides ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}
.related-guides li { margin: 0; }
.related-guides a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.related-guides a:hover { text-decoration: underline; }

/* --------------------------------------------------------------------------
   23. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 700px) {
  .nav-bar {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
  }

  .container { padding: 0 1rem; }

  .hero { padding: 3rem 1rem 2rem; }

  section { padding: 1.75rem 0; }

  .related-links { grid-template-columns: 1fr; }

  /* Collapse card grids to a single column */
  .milestone,
  .faq-item,
  .step-box,
  .tier-card,
  .pillar-card,
  .path-card,
  .method-card,
  .wallet-card,
  .ecosystem-card,
  .card {
    width: 100%;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}