/* ═══════════════════════════════════════════
   BTCyield — btcyield.online
   Styles v1.0
   ═══════════════════════════════════════════ */

/* ── Design tokens ── */
:root {
  --bg:          #0d0d0f;
  --bg2:         #141418;
  --bg3:         #1a1a20;
  --gold:        #f0a830;
  --gold-dim:    #c88a20;
  --gold-glow:   rgba(240, 168, 48, 0.15);
  --green:       #2ecc71;
  --green-dim:   #27ae60;
  --purple:      #8e44ad;
  --red:         #e74c3c;
  --text:        #e8e6e3;
  --text-dim:    #8a8a8e;
  --text-bright: #ffffff;
  --border:      #2a2a30;
  --serif:       'Playfair Display', Georgia, serif;
  --sans:        'DM Sans', system-ui, sans-serif;
  --mono:        'DM Mono', 'Fira Code', monospace;
  --ease:        cubic-bezier(0.16, 1, 0.3, 1);
  --radius:      2px;
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Grain overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

a { color: var(--gold); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--text-bright); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* ═══════════════════════════════════════════
   Navigation
   ═══════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0.8rem 0;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(13, 13, 15, 0.85);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, padding 0.3s;
}

.nav.scrolled {
  border-bottom-color: var(--border);
  padding: 0.5rem 0;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text-bright);
  text-decoration: none;
}

.nav-brand span { color: var(--gold); }

.nav-links {
  display: flex;
  gap: 1.8rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 400;
  transition: color 0.3s;
}

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

/* ── Wallet button ── */
.wallet-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 1.1rem;
  background: transparent;
  color: var(--text);
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s, background 0.3s;
  white-space: nowrap;
}

.wallet-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.wallet-btn.connected {
  border-color: var(--green);
  color: var(--green);
}

.wallet-btn .wallet-icon {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  position: relative;
}

.wallet-btn .wallet-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.wallet-btn.connected .wallet-icon {
  background: var(--green);
  border-color: var(--green);
}

.wallet-btn.connected .wallet-icon::after {
  background: var(--bg);
}

/* ── Nav CTA ── */
.nav-cta {
  padding: 0.5rem 1.2rem;
  background: var(--gold);
  color: var(--bg) !important;
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: var(--radius);
  transition: background 0.3s;
}

.nav-cta:hover {
  background: var(--gold-dim);
  color: var(--bg) !important;
}

/* ── Mobile menu ── */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
  z-index: 110;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  position: absolute;
  left: 0;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-toggle span:nth-child(1) { top: 0; }
.mobile-toggle span:nth-child(2) { top: 9px; }
.mobile-toggle span:nth-child(3) { top: 18px; }

.mobile-toggle.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* ── Wallet modal ── */
.wallet-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.wallet-modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.wallet-modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 2.5rem;
  width: 90%;
  max-width: 420px;
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.4s var(--ease);
}

.wallet-modal-overlay.active .wallet-modal {
  transform: translateY(0) scale(1);
}

.wallet-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.3s;
  line-height: 1;
}

.wallet-modal-close:hover { color: var(--text-bright); }

.wallet-modal h3 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.wallet-modal p {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.wallet-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg3);
  border: 1px solid var(--border);
  cursor: pointer;
  margin-bottom: 0.6rem;
  transition: border-color 0.3s, background 0.3s;
}

.wallet-option:hover {
  border-color: var(--gold-dim);
  background: var(--bg);
}

.wallet-option-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.wallet-option-icon.mm { background: #f6851b22; color: #f6851b; }
.wallet-option-icon.wc { background: #3b99fc22; color: #3b99fc; }
.wallet-option-icon.cb { background: #0052ff22; color: #0052ff; }
.wallet-option-icon.rb { background: #7c3aed22; color: #7c3aed; }

.wallet-option-name {
  font-weight: 500;
  color: var(--text-bright);
  font-size: 0.95rem;
}

.wallet-option-desc {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ═══════════════════════════════════════════
   Hero
   ═══════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  padding: 6rem 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(240, 168, 48, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 2rem;
  animation: fadeUp 0.8s ease both;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 900;
  line-height: 1.0;
  color: var(--text-bright);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s 0.1s ease both;
}

.hero h1 span { color: var(--gold); }

.hero-sub {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 3rem;
  animation: fadeUp 0.8s 0.2s ease both;
}

.hero-metrics {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.3s ease both;
}

.metric {
  border-left: 2px solid var(--gold);
  padding-left: 1rem;
}

.metric-value {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-bright);
}

.metric-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════
   Sections — shared
   ═══════════════════════════════════════════ */
section { padding: 7rem 0; }

.section-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 1rem;
  line-height: 1.15;
}

.section-sub {
  color: var(--text-dim);
  max-width: 600px;
  margin-bottom: 3rem;
  font-size: 1.05rem;
}

/* ═══════════════════════════════════════════
   Partners
   ═══════════════════════════════════════════ */
.partners { border-top: 1px solid var(--border); }

.partners-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.partner-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s;
}

.partner-card:hover { border-color: var(--gold-dim); }

.partner-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}

.partner-card.cc::before { background: #0f3460; }
.partner-card.sf::before { background: #d85a30; }

.partner-name {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.3rem;
}

.partner-role {
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.partner-list { list-style: none; }

.partner-list li {
  padding: 0.4rem 0;
  font-size: 0.95rem;
  color: var(--text);
  position: relative;
  padding-left: 1.2rem;
}

.partner-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--gold-dim);
}

.partner-link {
  display: inline-block;
  margin-top: 1.2rem;
  font-size: 0.9rem;
}

/* ═══════════════════════════════════════════
   Architecture
   ═══════════════════════════════════════════ */
.architecture {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.arch-diagram {
  background: #fff;
  padding: 2rem;
  border-radius: var(--radius);
  overflow: hidden;
}

.arch-diagram img {
  width: 100%;
  height: auto;
  display: block;
}

/* ═══════════════════════════════════════════
   Streams
   ═══════════════════════════════════════════ */
.streams-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.stream-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.4s;
}

.stream-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-dim);
}

.stream-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 3px;
}

.stream-card.s1::before { background: var(--gold); }
.stream-card.s2::before { background: var(--green); }

.stream-number {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.stream-name {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.stream-yield {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.stream-card.s1 .stream-yield { color: var(--gold); }
.stream-card.s2 .stream-yield { color: var(--green); }

.stream-risk {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.stream-desc {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.6;
}

.stream-features {
  list-style: none;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.stream-features li {
  padding: 0.35rem 0;
  font-size: 0.9rem;
  padding-left: 1.2rem;
  position: relative;
}

.stream-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.8rem;
}

/* ═══════════════════════════════════════════
   Strategies table
   ═══════════════════════════════════════════ */
.strategies {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.strat-table th {
  text-align: left;
  padding: 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  border-bottom: 2px solid var(--gold);
  font-weight: 500;
}

.strat-table td {
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border);
}

.strat-table tr:hover td { background: rgba(240, 168, 48, 0.03); }
.strat-table td:last-child { color: var(--green); font-weight: 500; }

/* ═══════════════════════════════════════════
   Security
   ═══════════════════════════════════════════ */
.security-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.sec-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: border-color 0.4s;
}

.sec-card:hover { border-color: var(--gold-dim); }
.sec-icon { font-size: 1.5rem; margin-bottom: 1rem; }

.sec-title {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.5rem;
}

.sec-desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ═══════════════════════════════════════════
   Tagline
   ═══════════════════════════════════════════ */
.tagline {
  text-align: center;
  padding: 2rem 0;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--gold);
  border-top: 1px solid var(--border);
}

/* ═══════════════════════════════════════════
   Liquidity
   ═══════════════════════════════════════════ */
.liquidity {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.liq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.liq-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 2rem;
}

.liq-provider {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.liq-amount {
  font-family: var(--serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-bright);
  margin: 0.3rem 0;
}

.liq-status {
  font-size: 0.85rem;
  color: var(--green);
}

.liq-total {
  text-align: center;
  padding: 2rem;
  border: 1px solid var(--gold-dim);
  background: rgba(240, 168, 48, 0.04);
}

.liq-total-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.liq-total-value {
  font-family: var(--serif);
  font-size: 3rem;
  font-weight: 900;
  color: var(--gold);
}

/* ═══════════════════════════════════════════
   CTA
   ═══════════════════════════════════════════ */
.cta-section {
  padding: 8rem 0;
  text-align: center;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 60vh;
  background: radial-gradient(ellipse, rgba(240, 168, 48, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  color: var(--text-bright);
  margin-bottom: 1rem;
}

.cta-sub {
  color: var(--text-dim);
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  background: var(--gold);
  color: var(--bg);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: background 0.3s, transform 0.2s;
}

.cta-btn:hover {
  background: var(--gold-dim);
  color: var(--bg);
  transform: translateY(-2px);
}

.cta-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  background: transparent;
  color: var(--text);
  font-family: var(--sans);
  font-weight: 500;
  font-size: 1rem;
  border: 1px solid var(--border);
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: border-color 0.3s, color 0.3s;
}

.cta-btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
}

/* ═══════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════ */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-bright);
}

.footer-links { display: flex; gap: 2rem; }
.footer-links a { color: var(--text-dim); font-size: 0.9rem; }
.footer-links a:hover { color: var(--gold); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ═══════════════════════════════════════════
   Scroll reveal
   ═══════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
  .partners-grid,
  .streams-grid,
  .security-grid,
  .liq-grid { grid-template-columns: 1fr; }

  .hero-metrics { flex-direction: column; gap: 1.5rem; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #0d0d0f;
    padding: 80px 40px;
    gap: 25px;
    z-index: 10001;
    opacity: 1 !important;
  }

  .nav-links.open a {
    color: var(--text-bright) !important;
    font-size: 1.4rem;
    font-weight: 500;
    opacity: 1;
  }

  .mobile-toggle { display: block; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }

  .strat-table { font-size: 0.85rem; }
  .strat-table th, .strat-table td { padding: 0.6rem 0.5rem; }
}