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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #0f0f1a;
  color: #e0e0e0;
  min-height: 100vh;
}

header {
  background: #1a1a2e;
  border-bottom: 1px solid #2a2a4a;
  padding: 0.75rem 1.5rem;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
}

.site-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #a78bfa;
  letter-spacing: 0.05em;
}

#nav-links {
  display: flex;
  gap: 0.75rem;
}

#nav-links a {
  color: #a0a0c0;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
}

#nav-links a:hover { color: #e0e0ff; background: #2a2a4a; }

main {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.loading { color: #666; text-align: center; padding: 3rem; }

h1 { font-size: 1.6rem; color: #c4b5fd; margin-bottom: 1.5rem; }
h2 { font-size: 1.2rem; color: #a78bfa; margin-bottom: 1rem; }

/* Card / form */
.card {
  background: #1a1a2e;
  border: 1px solid #2a2a4a;
  border-radius: 8px;
  padding: 1.5rem;
  max-width: 420px;
}

.form-group { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }
.form-group label { font-size: 0.85rem; color: #a0a0c0; }

input[type="text"],
input[type="password"],
input[type="email"] {
  background: #0f0f1a;
  border: 1px solid #3a3a5a;
  border-radius: 4px;
  color: #e0e0e0;
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
input:focus { border-color: #7c3aed; }

button {
  background: #7c3aed;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.55rem 1.2rem;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s;
}
button:hover { background: #6d28d9; }
button:disabled { background: #4a4a6a; cursor: not-allowed; }

.error-msg { color: #f87171; font-size: 0.88rem; margin-top: 0.5rem; }
.success-msg { color: #34d399; font-size: 0.88rem; margin-top: 0.5rem; }

/* Leaderboard */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th {
  background: #1a1a2e;
  color: #a78bfa;
  padding: 0.6rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid #2a2a4a;
  font-weight: 600;
}
td {
  padding: 0.5rem 0.8rem;
  border-bottom: 1px solid #1e1e36;
  color: #d0d0e8;
}
tr:nth-child(even) td { background: #141426; }
tr:hover td { background: #1e1e38; }

.rank-1 td:first-child { color: #fbbf24; font-weight: 700; }
.rank-2 td:first-child { color: #94a3b8; font-weight: 700; }
.rank-3 td:first-child { color: #b45309; font-weight: 700; }

.captcha-wrap { margin-bottom: 1rem; }

/* Download */
.download-link {
  display: block;
  background: #0f0f1a;
  border: 1px solid #3a3a5a;
  border-radius: 6px;
  color: #c4b5fd;
  text-decoration: none;
  padding: 0.75rem 1rem;
  margin-top: 0.5rem;
  transition: border-color 0.15s, background 0.15s;
}
.download-link:hover { border-color: #7c3aed; background: #1e1e38; }
.card p { color: #a0a0c0; margin-bottom: 0.75rem; }