:root{
  --bg: #0A0C10;
  --bg-panel: #12151B;
  --bg-panel-2: #171B22;
  --line: #1F242D;
  --text: #E7E9EC;
  --text-dim: #6B7280;
  --btc: #F7931A;
  --green: #16C784;
  --red: #EA3943;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}
*{ box-sizing: border-box; }
html, body{
  margin:0; padding:0; min-height:100%;
  background: var(--bg); color: var(--text);
  font-family: var(--font-display);
}
a{ color: inherit; text-decoration:none; }
h1,h2,h3{ font-family: var(--font-display); font-weight:700; margin:0 0 12px; }
p{ line-height:1.6; color: var(--text-dim); }

/* ---- Nav ------------------------------------------------------------ */
.topnav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--line);
  position:sticky; top:0; background: rgba(10,12,16,0.9); backdrop-filter: blur(6px);
  z-index: 50; flex-wrap: wrap; gap: 10px 16px;
}
.topnav-links{ display:flex; align-items:center; flex-wrap:wrap; gap:10px 20px; font-family: var(--font-mono); font-size:14px; letter-spacing:0.03em; }

@media (max-width: 640px){
  .topnav{ padding: 14px 16px; }
  .topnav-links{ font-size:12px; gap:8px 14px; width:100%; }
}
.topnav-logo{ font-weight:700; letter-spacing:-0.01em; font-size:15px; display:flex; align-items:center; gap:8px; }
.topnav-logo-img{ height:24px; width:auto; display:block; }
.topnav-logo-text span{ color: var(--btc); }
.topnav-links a{ color: var(--text-dim); }
.topnav-links a:hover{ color: var(--text); }
.topnav-profile{ display:flex; align-items:center; gap:8px; color: var(--text) !important; }
.topnav-profile img{ width:22px; height:22px; border-radius:50%; object-fit:cover; }
.topnav-login{
  background: var(--btc); color:#161006 !important; padding:8px 16px; border-radius:999px;
  font-weight:700;
}

/* ---- Generic page shell ---------------------------------------------- */
main{ max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
.page-header{ margin-bottom: 28px; }
.page-header p{ margin-top:6px; }

.btn{
  display:inline-block; padding: 12px 26px; border-radius: 999px;
  background: var(--btc); color:#161006; border:none;
  font-family: var(--font-display); font-weight:700; font-size:14px;
  cursor:pointer; letter-spacing:0.02em;
}
.btn:active{ transform: scale(0.98); }
.btn.secondary{ background: var(--bg-panel-2); color: var(--text); border:1px solid var(--line); }

.card{
  background: var(--bg-panel); border:1px solid var(--line); border-radius:14px;
  padding: 20px;
}

/* ---- Leaderboards ------------------------------------------------------ */
.rank-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:2px; }
.rank-row{
  display:flex; align-items:center; gap:14px; padding: 12px 14px;
  border-radius:10px;
}
.rank-row:nth-child(odd){ background: var(--bg-panel); }
.rank-number{
  font-family: var(--font-mono); color: var(--text-dim); width:28px; text-align:right; font-size:13px;
}
.rank-row:nth-child(1) .rank-number{ color: var(--btc); }
.rank-avatar{ width:32px; height:32px; border-radius:50%; object-fit:cover; background: var(--bg-panel-2); }
.rank-name{ flex:1; font-weight:600; font-size:14px; }
.rank-x{ font-family: var(--font-mono); font-size:11px; color: var(--text-dim); }
.rank-value{ font-family: var(--font-mono); font-size:13px; color: var(--text-dim); }
.rank-badge{ font-size:16px; }

/* ---- Forms ------------------------------------------------------------- */
.field{ margin-bottom:18px; }
.amount-chips{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:12px; }
.amount-chip{
  font-family: var(--font-mono); font-size:13px; font-weight:600;
  padding:10px 16px; border-radius:999px; border:1px solid var(--line);
  background: var(--bg-panel); color: var(--text); cursor:pointer;
}
.amount-chip:hover{ border-color: var(--btc); }
.amount-chip.active{ background: var(--btc); color:#161006; border-color: var(--btc); }

.field label{ display:block; font-family: var(--font-mono); font-size:11px; letter-spacing:0.08em; color: var(--text-dim); text-transform:uppercase; margin-bottom:6px; }
.field input[type=text], .field select{
  width:100%; padding:12px 14px; border-radius:8px; border:1px solid var(--line);
  background: var(--bg-panel); color: var(--text); font-family: var(--font-display); font-size:14px;
}
.form-error{ color: var(--red); font-family: var(--font-mono); font-size:12px; margin-top:8px; }
.form-success{ color: var(--green); font-family: var(--font-mono); font-size:12px; margin-top:8px; }

/* ---- Contact page: protected email reveal ------------------------------- */
.email-reveal{
  margin-top:16px; display:flex; align-items:center; justify-content:center; gap:10px; flex-wrap:wrap;
}
.email-reveal.hidden{ display:none; }
#revealEmailBtn.hidden{ display:none; }
.email-link{
  font-family: var(--font-mono); font-size:15px; color: var(--btc);
  background: var(--bg-panel-2); border:1px solid var(--line);
  padding:10px 16px; border-radius:8px;
}

/* ---- Onboarding --------------------------------------------------------- */
.onboarding{ max-width:400px; margin: 60px auto; text-align:center; }
.onboarding-sub{ margin-bottom:24px; }
.onboarding-form input{ margin-bottom:14px; text-align:center; }

/* ---- Donor tiers --------------------------------------------------------- */
.tier-legend{ display:flex; flex-wrap:wrap; justify-content:center; align-items:center; gap:8px; font-family: var(--font-mono); font-size:14px; color: var(--text-dim); margin-top:28px; }
.tier-legend span{ background: var(--bg-panel); padding:8px 14px; border-radius:999px; }
.tier-legend span:nth-child(even){ background:none; padding:0; color: var(--text-dim); opacity:0.5; }

.site-footer{
  text-align:center; padding: 30px 20px; color: var(--text-dim);
  font-family: var(--font-mono); font-size:13px; letter-spacing:0.04em;
  border-top:1px solid var(--line);
}
.site-footer a{ color: var(--text-dim); }
.site-footer a:hover{ color: var(--text); }