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

:root {
  --bg-primary: #0a0f1c;
  --bg-secondary: #111827;
  --bg-card: #1a2235;
  --bg-card-hover: #1f2a40;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #38bdf8;
  --accent-cyan: #22d3ee;
  --accent-green: #34d399;
  --border-color: #1e293b;
  --border-accent: #334155;
  --mono-font: "SF Mono", "Fira Code", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  --sans-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --container-max: 960px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans-font);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* --- Header / Nav --- */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 15, 28, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

header nav {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--accent-cyan);
}

/* --- Hero --- */

#hero {
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.hero-name {
  font-family: var(--mono-font);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-xs);
}

.hero-tagline {
  font-family: var(--mono-font);
  font-size: clamp(1rem, 3vw, 1.4rem);
  color: var(--accent-cyan);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.05em;
}

.hero-mission {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.8;
}

.cta-button {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border-radius: 6px;
  transition: transform 0.15s, box-shadow 0.15s;
}

.cta-button:hover,
.cta-button:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.3);
}

/* --- Sections --- */

section {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
  border-bottom: none;
}

h2 {
  font-family: var(--mono-font);
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.01em;
}

.section-intro {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
  margin-bottom: var(--spacing-lg);
  line-height: 1.8;
}

/* --- Why Section --- */

.prose p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.85;
  font-size: 1.05rem;
}

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

/* --- Donation Cards --- */

.donation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.donation-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-md);
  transition: border-color 0.2s, background 0.2s;
}

.donation-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
}

.donation-card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.chain-name {
  font-family: var(--mono-font);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.chain-ticker {
  font-family: var(--mono-font);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.donation-address {
  font-family: var(--mono-font);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  background: var(--bg-primary);
  padding: 0.75rem;
  border-radius: 4px;
  word-break: break-all;
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--border-color);
  line-height: 1.5;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid var(--border-accent);
  color: var(--text-secondary);
  font-family: var(--mono-font);
  font-size: 0.8rem;
  padding: 0.4rem 0.9rem;
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.copy-btn:hover,
.copy-btn:focus {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

.copy-btn.copied {
  color: var(--accent-green);
  border-color: var(--accent-green);
}

/* --- Share Section --- */

.share-templates {
  display: grid;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.share-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--spacing-md);
}

.share-card-label {
  font-family: var(--mono-font);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

.share-card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
  padding: 0.75rem;
  background: var(--bg-primary);
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.hashtags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.hashtag {
  font-family: var(--mono-font);
  font-size: 0.85rem;
  color: var(--accent-blue);
  background: rgba(56, 189, 248, 0.1);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

/* --- Wall of Support --- */

.wall-placeholder {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--bg-card);
  border: 1px dashed var(--border-accent);
  border-radius: 8px;
  color: var(--text-muted);
}

.wall-icon {
  margin-bottom: var(--spacing-sm);
  color: var(--text-muted);
}

.wall-message {
  font-family: var(--mono-font);
  font-size: 0.9rem;
}

/* --- Footer --- */

footer {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--border-color);
}

.footer-statement {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-family: var(--mono-font);
  font-size: 0.8rem;
  transition: color 0.2s;
}

.footer-links a:hover,
.footer-links a:focus {
  color: var(--accent-cyan);
}

/* --- Responsive --- */

@media (max-width: 600px) {
  .donation-grid {
    grid-template-columns: 1fr;
  }

  header nav {
    gap: var(--spacing-sm);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}