/* ============================================================
   BUTTERFLY VAULT — Clean White Premium
   Aesthetic: Premium fintech app with gold accents
   Fonts: Cormorant Garamond (display) + DM Sans (body) + JetBrains Mono (data)
   ============================================================ */


:root {
  --gold: #c9a84c;
  --gold-light: #d4b96a;
  --gold-dim: #8b6914;
  --gold-glow: rgba(201, 168, 76, 0.1);
  --bg-void: #f0f0f2;
  --bg-surface: #f6f6f8;
  --bg-elevated: #fafafa;
  --bg-card: #fafafa;
  --border: rgba(0, 0, 0, 0.08);
  --border-active: rgba(201, 168, 76, 0.4);
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --blue: #3b82f6;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--bg-void);
  background-image: url('../assets/bg-pattern.png');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---- Ambient Background ---- */

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0;
}

.bg-glow-1 {
  width: 600px; height: 600px;
  top: -200px; left: -100px;
  background: radial-gradient(circle, rgba(201, 168, 76, 0.06) 0%, transparent 70%);
  animation: drift 20s ease-in-out infinite;
}

.bg-glow-2 {
  width: 500px; height: 500px;
  bottom: -150px; right: -100px;
  background: radial-gradient(circle, rgba(139, 105, 20, 0.05) 0%, transparent 70%);
  animation: drift 25s ease-in-out infinite reverse;
}

@keyframes drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 20px); }
}

.bg-noise {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0;
  pointer-events: none;
  display: none;
}

.butterfly-bg {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px; height: 640px;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  display: none;
}

@keyframes breathe {
  0%, 100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.7; transform: translate(-50%, -50%) scale(1.03); }
}

/* ---- Layout ---- */

header, .hero-stats, main, footer {
  position: relative;
  z-index: 1;
}

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

header {
  border-bottom: 1px solid var(--border);
  backdrop-filter: none;
  background: #fafafa;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.wallet-btn {
  padding: 10px 20px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 44px;
}

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

.wallet-btn.connected {
  background: var(--gold-glow);
  border-color: var(--gold);
  color: var(--gold-dim);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---- Language Dropdown ---- */

.lang-dropdown {
  position: relative;
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.25s;
  min-height: 36px;
  white-space: nowrap;
}

.lang-current:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.lang-current svg {
  flex-shrink: 0;
  color: var(--gold);
}

.lang-chevron {
  transition: transform 0.25s;
  color: var(--text-muted) !important;
}

.lang-dropdown.open .lang-chevron {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 120px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

.lang-dropdown.open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-item {
  display: block;
  width: 100%;
  padding: 9px 14px;
  border: none;
  background: transparent;
  border-radius: 7px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
}

.lang-item:hover {
  background: var(--gold-glow);
  color: var(--gold);
}

.lang-item.active {
  color: var(--gold);
  font-weight: 600;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-mark {
  width: 64px; height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 168, 76, 0.08);
  border-radius: 10px;
  border: 1px solid rgba(201, 168, 76, 0.15);
}

.brand-text h1 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: 3px;
}

.tagline {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.btn-connect {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--border-active);
  border-radius: 8px;
  color: var(--gold);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  letter-spacing: 0.5px;
}

.btn-connect:hover {
  background: rgba(201, 168, 76, 0.06);
  border-color: var(--gold);
  box-shadow: 0 0 12px rgba(201, 168, 76, 0.12);
}

.btn-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  animation: pulse 2s ease-in-out infinite;
}

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

.wallet-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  padding: 8px 14px;
  background: rgba(201, 168, 76, 0.05);
  border: 1px solid rgba(201, 168, 76, 0.2);
  border-radius: 6px;
}

/* ---- Hero Stats ---- */

.hero-stats {
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: none;
}

.hero-stats-inner {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 24px;
  gap: 16px;
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  animation: fadeUp 0.6s ease-out backwards;
  animation-delay: calc(var(--delay) * 0.1s);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-stat-icon {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 168, 76, 0.08);
  border-radius: 10px;
  color: var(--gold);
  flex-shrink: 0;
}

.hero-stat-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  color: var(--gold);
  display: block;
  overflow-wrap: break-word;
  word-break: break-all;
}

.hero-stat-label {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  display: block;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Main ---- */

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

/* ---- Tabs ---- */

.tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 0;
  padding: 3px;
  background: #f0f1f3;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 9px 14px;
  background: transparent;
  border: none;
  border-radius: 7px;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.tab:hover { color: var(--text-primary); background: rgba(0, 0, 0, 0.03); }

.tab.active {
  background: #fff;
  color: var(--gold);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(201, 168, 76, 0.12);
}

.tab svg { display: none; }

/* ---- Tab Content ---- */

.tab-content { display: none; margin-top: 20px; }
.tab-content.active { display: block; animation: fadeUp 0.3s ease-out; }

/* ---- Panel ---- */

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.panel::before {
  display: none;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.panel-header h2 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
}

.panel-badge {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gold);
  padding: 4px 10px;
  background: rgba(201, 168, 76, 0.08);
  border: 1px solid rgba(201, 168, 76, 0.15);
  border-radius: 4px;
}

.panel-badge.safety { color: var(--green); background: rgba(34, 197, 94, 0.08); border-color: rgba(34, 197, 94, 0.2); }

/* ---- Empty State ---- */

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

.empty-icon { margin-bottom: 16px; }

/* ---- Metrics ---- */

.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.metric {
  padding: 16px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.3s;
}

.metric:hover { border-color: var(--border-active); }

.metric-highlight {
  border-color: rgba(201, 168, 76, 0.2);
  background: rgba(201, 168, 76, 0.04);
}

.metric-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.metric-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  overflow-wrap: break-word;
  word-break: break-all;
}

.metric-value.gold { color: var(--gold); }

/* ---- Buttons ---- */

.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s;
  letter-spacing: 0.3px;
  min-height: 44px;
}

.btn-gold {
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dim) 100%);
  color: #ffffff;
  box-shadow: 0 2px 12px rgba(201, 168, 76, 0.25);
}

.btn-gold:hover {
  box-shadow: 0 4px 24px rgba(201, 168, 76, 0.4);
  transform: translateY(-1px);
}

.btn-gold:disabled {
  background: #d1d5db;
  color: #9ca3af;
  box-shadow: none;
  transform: none;
  cursor: not-allowed;
}

.btn-ghost {
  padding: 12px 24px;
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--border-active);
}

.btn-ghost:hover {
  background: var(--gold-glow);
  border-color: var(--gold);
}

.btn-tag {
  padding: 6px 12px;
  background: rgba(201, 168, 76, 0.08);
  color: var(--gold);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  min-height: 36px;
}

.btn-tag:hover { background: rgba(201, 168, 76, 0.15); }

.btn-full { width: 100%; margin-top: 16px; padding: 14px; font-size: 14px; min-height: 48px; }

.action-row {
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.action-row .btn { flex: 1; }

/* ---- Status ---- */

.status {
  font-size: 12px;
  margin-top: 12px;
  min-height: 18px;
  font-family: var(--font-mono);
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-all;
}
.status.loading { color: var(--yellow); }
.status.success { color: var(--green); }
.status.error { color: var(--red); }

/* ---- Explainer ---- */

.explainer {
  margin-top: 20px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.explainer h3 {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.explainer-steps { display: flex; flex-direction: column; gap: 10px; }

.step {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: #f8f9fa;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--gold);
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 168, 76, 0.08);
  border-radius: 6px;
  flex-shrink: 0;
}

.step-text { font-size: 13px; color: var(--text-secondary); }

.step-warn { border-color: rgba(239, 68, 68, 0.2); }
.step-warn .step-num { color: var(--red); background: rgba(239, 68, 68, 0.08); }
.step-warn .step-text { color: var(--red); opacity: 0.85; }

/* ---- Tier Table ---- */

.tier-table {
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.tier-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.tier-row:last-of-type { border-bottom: none; }

.tier-range { color: var(--text-secondary); }
.tier-action { color: var(--text-primary); }
.tier-action strong { color: var(--gold); }

.tier-1 { background: #fafafa; }
.tier-2 { background: rgba(201, 168, 76, 0.04); }

.tier-note {
  font-size: 11px;
  color: var(--text-muted);
  padding: 10px 16px;
  border-top: 1px solid var(--border);
}

/* ---- Redeem Form ---- */

.redeem-section { margin-top: 20px; }

.input-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.input-row { display: flex; gap: 8px; }

.input-field {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid #d1d5db;
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 16px;
  outline: none;
  transition: border-color 0.25s;
}

.input-field::placeholder { color: var(--text-muted); }
.input-field:focus { border-color: var(--gold); box-shadow: 0 0 0 3px var(--gold-glow); }

.preview-bar {
  margin-top: 10px;
  padding: 10px 14px;
  background: rgba(34, 197, 94, 0.04);
  border: 1px solid rgba(34, 197, 94, 0.15);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.preview-bar strong { color: var(--green); font-family: var(--font-mono); }

/* ---- Vault Health ---- */

.vault-health {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.vault-health h3 {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.health-grid {
  display: flex;
  gap: 12px;
}

.health-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  background: #f8f9fa;
  border-radius: 8px;
  border: 1px solid var(--border);
  text-align: center;
}

.health-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
}

.health-dot.green { background: var(--green); box-shadow: 0 0 6px rgba(34, 197, 94, 0.4); }
.health-dot.yellow { background: var(--yellow); box-shadow: 0 0 6px rgba(234, 179, 8, 0.4); }
.health-dot.blue { background: var(--blue); box-shadow: 0 0 6px rgba(59, 130, 246, 0.4); }

.health-label { font-size: 10px; color: var(--text-muted); letter-spacing: 0.3px; }
.health-value { font-family: var(--font-mono); font-size: 13px; font-weight: 500; color: var(--text-primary); }

/* ---- Footer ---- */

footer {
  border-top: 1px solid var(--border);
  padding: 40px 20px;
  text-align: center;
  background: #f8f9fa;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--gold-dim);
  letter-spacing: 4px;
  margin-bottom: 8px;
}

.footer-slogan {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  font-size: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--gold); }

.footer-links .dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
}

/* ---- Leaderboard ---- */

.leaderboard { margin-top: 8px; }

.leaderboard-header {
  display: grid;
  grid-template-columns: 40px 1fr 120px 100px;
  padding: 10px 16px;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.leaderboard-body { min-height: 200px; }

.lb-row {
  display: grid;
  grid-template-columns: 40px 1fr 120px 100px;
  padding: 14px 16px;
  align-items: center;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.lb-row:hover { background: rgba(201, 168, 76, 0.05); }

.lb-row:nth-child(-n+3) .lb-rank {
  color: var(--gold);
  font-weight: 700;
}

.lb-rank {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.lb-address {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
}

.lb-time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  text-align: right;
}

.lb-bnb {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  text-align: right;
}

/* ---- Referral ---- */

.ref-link-section {
  margin-bottom: 20px;
}

.ref-link-section label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.ref-link-row {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.ref-link-row:focus-within {
  border-color: var(--gold);
}

.ref-link-input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 10px 14px;
  background: var(--surface);
  border: none;
  color: var(--text-primary);
  outline: none;
  min-width: 0;
}

.ref-copy-btn {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  padding: 10px 16px;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dim) 100%);
  color: #fff;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}

.ref-copy-btn:hover {
  opacity: 0.85;
}

.ref-history-section {
  margin-top: 20px;
}

.ref-history-section h3 {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--gold);
  margin-bottom: 12px;
}

.ref-header-row,
.ref-row {
  display: grid;
  grid-template-columns: 1fr 120px 80px;
  padding: 10px 16px;
  align-items: center;
}

.ref-header-row {
  font-size: 12px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.ref-row {
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.ref-row:hover { background: rgba(201, 168, 76, 0.05); }

.ref-invitee {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
}

.ref-reward {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  text-align: right;
}

.ref-status {
  font-size: 12px;
  text-align: right;
  font-weight: 500;
}

.ref-status.success { color: var(--green); }
.ref-status.voided { color: var(--text-muted); }
.ref-status.pending { color: var(--gold); }

/* ---- Mechanism ---- */

.mechanism-section {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.mechanism-section:last-child { border-bottom: none; }

.mechanism-section h3 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--gold);
  margin-bottom: 12px;
}

.mech-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.mech-text strong { color: var(--gold); }

.mech-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Flow diagram */
.flow-diagram { text-align: center; padding: 16px 0; }

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.flow-icon { font-size: 24px; }
.flow-label { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.flow-detail { font-size: 12px; color: var(--text-muted); }

.flow-arrow {
  font-size: 20px;
  color: var(--gold);
  padding: 8px 0;
}

.flow-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.flow-split.flow-split-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.flow-branch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 10px;
}

/* Rules */
.mech-rules { display: flex; flex-direction: column; gap: 8px; }

.mech-rule {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: #f8f9fa;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.rule-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.rule-icon.good { background: rgba(34, 197, 94, 0.12); color: var(--green); }
.rule-icon.warn { background: rgba(239, 68, 68, 0.1); color: var(--red); }
.rule-icon.info { background: rgba(201, 168, 76, 0.1); color: var(--gold); }

/* Tier cards */
.tier-explain {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 16px 0;
}

.tier-card {
  padding: 16px 12px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: center;
}

.tier-card .tier-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  margin-bottom: 8px;
}

.tier-card .tier-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.tier-card .tier-value.gold { color: var(--gold); }

.tier-card .tier-desc {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
}

.tier-highlight-1 { border-color: rgba(201, 168, 76, 0.2); background: rgba(201, 168, 76, 0.04); }
.tier-highlight-2 { border-color: rgba(201, 168, 76, 0.3); background: rgba(201, 168, 76, 0.06); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 10px; }

.faq-item {
  padding: 14px 16px;
  background: #f8f9fa;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.faq-q {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.faq-a {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  overflow-wrap: break-word;
  word-break: break-word;
}

.faq-a a {
  overflow-wrap: break-word;
  word-break: break-all;
}


/* ---- Responsive ---- */

@media (max-width: 768px) {
  .hero-stats-inner {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
    gap: 10px;
  }
  .hero-stat { padding: 12px; gap: 10px; }
  .hero-stat-icon { width: 32px; height: 32px; }
  .hero-stat-value { font-size: 15px; }

  /* Tabs: smaller on tablet */
  .tab { padding: 8px 12px; font-size: 12px; }

  /* Leaderboard: tighter columns */
  .leaderboard-header,
  .lb-row {
    grid-template-columns: 32px 1fr 90px 80px;
    padding: 10px 12px;
  }

  /* Referral grid: tighter columns */
  .ref-header-row,
  .ref-row {
    grid-template-columns: 1fr 100px 70px;
  }
  .lb-address {
    font-size: 11px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
  }
  .lb-time, .lb-bnb { font-size: 11px; white-space: nowrap; }

  /* Flow split 3-col -> 1-col at tablet */
  .flow-split.flow-split-3 { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  /* Header: keep horizontal, shrink logo */
  .header-inner { padding: 12px 14px; gap: 8px; }
  .logo-mark { width: 40px; height: 40px; }
  .logo-mark img { width: 40px; height: 40px; }
  .header-brand { gap: 10px; }
  .brand-text h1 { font-size: 17px; letter-spacing: 2px; }
  .tagline { font-size: 10px; }
  .wallet-btn { padding: 8px 14px; font-size: 12px; }
  .btn-connect { padding: 8px 14px; font-size: 12px; }

  /* Hero stats: keep 2-col for density */
  .hero-stats-inner { grid-template-columns: 1fr 1fr; gap: 8px; padding: 12px; }
  .hero-stat { padding: 10px; gap: 8px; }
  .hero-stat-icon { width: 28px; height: 28px; }
  .hero-stat-icon svg { width: 16px; height: 16px; }
  .hero-stat-value { font-size: 13px; }
  .hero-stat-label { font-size: 10px; }

  /* Main content */
  main { padding: 16px 12px 40px; }
  .panel { padding: 16px; }

  /* Metrics: keep 2-col */
  .metric-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .metric { padding: 12px; }
  .metric-label { font-size: 10px; }
  .metric-value { font-size: 14px; }

  /* Buttons: stack vertically */
  .action-row { flex-direction: column; gap: 8px; }
  .action-row .btn { width: 100%; min-height: 48px; font-size: 14px; }

  /* Health grid: horizontal but compact */
  .health-grid { gap: 8px; }
  .health-item { padding: 10px 6px; }
  .health-label { font-size: 9px; }
  .health-value { font-size: 12px; }

  /* Tabs: scrollable, compact */
  .tab { padding: 9px 12px; font-size: 12px; }

  /* Tier cards: single column */
  .tier-explain { grid-template-columns: 1fr; gap: 8px; }

  /* Flow diagram: single column */
  .flow-split { grid-template-columns: 1fr; }
  .flow-split.flow-split-3 { grid-template-columns: 1fr; }

  /* Leaderboard: hide BNB column */
  .leaderboard-header,
  .lb-row {
    grid-template-columns: 28px 1fr 70px;
    padding: 10px 10px;
    font-size: 11px;
  }

  /* Referral grid: compact */
  .ref-header-row,
  .ref-row {
    grid-template-columns: 1fr 80px 60px;
    font-size: 11px;
  }
  .lb-bnb { display: none; }
  .lb-address {
    font-size: 11px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
  }
  .lb-time { font-size: 11px; white-space: nowrap; }
  .lb-rank { font-size: 12px; }

  /* Tier table rows */
  .tier-row { flex-wrap: wrap; gap: 4px; padding: 10px 12px; font-size: 12px; }

  /* Input: ensure touch targets */
  .input-field { padding: 12px; font-size: 16px; min-height: 44px; }
  .btn-tag { min-height: 44px; padding: 8px 14px; }

  /* Redeem button */
  .btn-full { min-height: 48px; font-size: 14px; }

  /* Panel header */
  .panel-header { flex-wrap: wrap; gap: 8px; }
  .panel-header h2 { font-size: 20px; }
  .panel-badge { font-size: 9px; padding: 3px 8px; }

  /* Footer */
  .footer-links { flex-wrap: wrap; gap: 8px; }

  /* Explainer */
  .explainer { padding: 16px; }
  .step { padding: 10px 12px; gap: 10px; }

  /* Language toggle */
  .header-actions { gap: 6px; }
  .lang-current { padding: 5px 10px; font-size: 12px; min-height: 32px; }
  .lang-item { padding: 8px 12px; font-size: 12px; }
}

/* Extra-small phones (iPhone SE, Galaxy S mini, etc.) */
@media (max-width: 380px) {
  .header-inner { padding: 10px 10px; }
  .logo-mark { width: 34px; height: 34px; }
  .logo-mark img { width: 34px; height: 34px; }
  .header-brand { gap: 8px; }
  .brand-text h1 { font-size: 15px; letter-spacing: 1.5px; }
  .tagline { font-size: 9px; }
  .wallet-btn { padding: 7px 10px; font-size: 11px; }
  .btn-connect { padding: 7px 10px; font-size: 11px; }

  main { padding: 12px 8px 32px; }
  .panel { padding: 14px 10px; }
  .tabs { gap: 2px; padding: 3px; }
  .tab { padding: 7px 8px; font-size: 11px; }

  .hero-stats-inner { padding: 8px; gap: 6px; }
  .hero-stat { padding: 8px; }
  .hero-stat-value { font-size: 12px; }

  /* Health grid: stack on very small */
  .health-grid { flex-direction: column; }

  /* Metric grid: single column */
  .metric-grid { grid-template-columns: 1fr; }

  /* Language toggle + tagline */
  .tagline { display: none; }
  .header-actions { gap: 4px; }
  .lang-current { padding: 4px 8px; font-size: 11px; min-height: 30px; gap: 4px; }
  #lang-current-text { display: none; }
  .lang-chevron { display: none; }
}

/* ---- Swap Tab ---- */
.swap-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  max-width: 480px;
  margin: 0 auto;
  box-shadow: 0 2px 24px rgba(26, 26, 46, 0.04);
}
.swap-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.swap-header h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-secondary);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover { border-color: var(--border-active); color: var(--gold); }

.swap-ref-banner {
  background: var(--gold-glow);
  border: 1px solid var(--border-active);
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--text-primary);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.swap-ref-banner code {
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: 12px;
  color: var(--gold-dim);
  background: rgba(255,255,255,0.6);
  padding: 2px 6px;
  border-radius: 4px;
}

.swap-row { margin-bottom: 10px; }
.swap-row label {
  font-size: 11px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 6px;
}

.swap-input {
  display: flex;
  gap: 10px;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 14px;
  transition: border-color 0.2s;
}
.swap-input:focus-within { border-color: var(--border-active); }
.swap-input select {
  background: transparent;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  min-width: 76px;
  padding: 4px 2px;
}
.swap-input input {
  flex: 1;
  background: transparent;
  border: none;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  font-size: 22px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: right;
  min-width: 0;
  outline: none;
}
.swap-input input::placeholder { color: var(--text-muted); }

.swap-balance {
  display: flex;
  gap: 6px;
  justify-content: flex-end;
  align-items: center;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
}
.swap-balance button {
  background: var(--gold-glow);
  color: var(--gold-dim);
  border: 1px solid var(--border-active);
  padding: 2px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all 0.2s;
}
.swap-balance button:hover { background: var(--gold); color: #fff; }

.swap-switch-row { display: flex; justify-content: center; margin: 4px 0; }
.swap-switch {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 18px;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.swap-switch:hover { border-color: var(--border-active); color: var(--gold); transform: rotate(180deg); }

.swap-ref-reward {
  background: var(--gold-glow);
  border: 1px solid var(--border-active);
  border-radius: 10px;
  padding: 10px 12px;
  margin: 14px 0 8px;
  font-size: 13px;
  color: var(--text-primary);
  text-align: center;
}
.swap-ref-reward strong { color: var(--gold-dim); font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace); }

.swap-details {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 10px 2px 14px;
  border-top: 1px dashed var(--border);
  padding-top: 10px;
}
.swap-details > div {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
}

.btn-wide { width: 100%; padding: 14px; font-size: 15px; }

.swap-mev-hint {
  margin-top: 14px;
  text-align: center;
  font-size: 12px;
}
.link-btn {
  background: none;
  border: none;
  color: var(--gold-dim);
  cursor: pointer;
  font-size: 12px;
  text-decoration: underline;
  text-decoration-color: var(--border-active);
  text-underline-offset: 3px;
}
.link-btn:hover { color: var(--gold); }

/* ---- Swap: slippage panel ---- */
.swap-slippage-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 14px;
  animation: slipFade 0.18s ease-out;
}
@keyframes slipFade {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.slippage-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.slippage-presets {
  display: flex;
  gap: 8px;
  align-items: stretch;
  flex-wrap: wrap;
}
.slip-chip {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
}
.slip-chip:hover { border-color: var(--border-active); }
.slip-chip.active {
  background: var(--gold-glow);
  border-color: var(--gold);
  color: var(--gold-dim);
}
.slip-custom {
  flex: 1;
  min-width: 120px;
  display: flex;
  align-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 10px;
  gap: 4px;
  transition: border-color 0.2s;
}
.slip-custom:focus-within { border-color: var(--border-active); }
.slip-custom input {
  flex: 1;
  background: none;
  border: none;
  padding: 6px 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  outline: none;
  min-width: 0;
  font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
}
.slip-custom input::placeholder { color: var(--text-muted); font-weight: 400; }
.slip-custom span { font-size: 13px; color: var(--text-muted); }

/* ---- Swap: tablets & phones (≤520px) ---- */
@media (max-width: 520px) {
  .swap-card {
    padding: 16px;
    border-radius: 14px;
    max-width: 100%;
  }
  .swap-header h2 { font-size: 20px; }
  .icon-btn { width: 32px; height: 32px; font-size: 14px; }
  .swap-input { padding: 12px; gap: 8px; border-radius: 10px; }
  .swap-input select { font-size: 14px; min-width: 70px; }
  .swap-input input { font-size: 20px; }
  .swap-ref-banner { font-size: 12px; padding: 8px 10px; }
  .swap-ref-banner code { font-size: 11px; }
  .swap-ref-reward { font-size: 12px; padding: 9px 10px; }
  .swap-details { font-size: 11px; }
  .btn-wide { padding: 13px; font-size: 14px; }
  .swap-mev-hint { font-size: 11px; }
  .link-btn { font-size: 11px; }
}

/* ---- Swap: small phones (≤380px) ---- */
@media (max-width: 380px) {
  .swap-card { padding: 14px 12px; }
  .swap-input { padding: 10px; }
  .swap-input input { font-size: 18px; }
  .swap-input select { font-size: 13px; min-width: 64px; padding: 3px 1px; }
  .swap-row label { font-size: 10px; }
  .swap-switch { width: 32px; height: 32px; font-size: 16px; }
  .btn-wide { padding: 12px; font-size: 13px; }
}