* { box-sizing: border-box; }
:root {
  --bg: #121212;
  --card: #181818;
  --text: #ffffff;
  --muted: #b3b3b3;
  --primary: #1DB954;
}
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 1200px at 80% -5%, rgba(29,185,84,0.25), rgba(29,185,84,0) 50%), var(--bg);
  color: var(--text);
}
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo-dot { width: 16px; height: 16px; background: var(--primary); border-radius: 50%; }
.brand-text { font-weight: 700; letter-spacing: 0.4px; }
.header-actions { display: flex; gap: 8px; }

.container { max-width: 800px; margin: 0 auto; padding: 24px; }
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}

h1, h2 { margin: 0 0 12px; }
.muted { color: var(--muted); }
.error { color: #ff6b6b; margin-top: 8px; }

.btn {
  background: var(--primary);
  color: var(--text);
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.05); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn.ghost { background: transparent; border: 1px solid rgba(255,255,255,0.2); }
.btn.small { padding: 6px 10px; font-size: 14px; }

.code-row { display: flex; align-items: center; gap: 12px; }
.code-display { font-size: 24px; letter-spacing: 2px; background: rgba(255,255,255,0.05); padding: 8px 12px; border-radius: 8px; }

.form-row { display: flex; gap: 12px; }
.form-row input {
  flex: 1;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06);
  color: var(--text);
}
.form-row input::placeholder { color: rgba(255,255,255,0.5); }

.result { display: grid; gap: 12px; }
.score { font-size: 72px; font-weight: 800; }
.names { color: var(--muted); }
.shared-list { list-style: none; padding: 0; margin: 0; }
.shared-list li { padding: 4px 0; }

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