:root {
  --bg: #111111;
  --money-green: #00D632;
  --gold: #FFC300;
  --card-bg: #1a1a1a;
  --text-dim: #999999;
  --border: #2a2a2a;
}

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

body {
  background: var(--bg);
  color: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
}

.screen { display: none; }
.screen.active { display: block; }
.hidden { display: none !important; }

/* ---------- AUTH ---------- */
#auth-screen.active {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-box {
  width: 100%;
  max-width: 380px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
}

.logo {
  text-align: center;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 24px;
  color: #fff;
}
.logo span { color: var(--gold); }
.logo.small { font-size: 18px; margin-bottom: 0; }

.auth-box h2 { margin-bottom: 16px; font-size: 18px; color: var(--text-dim); }

input {
  width: 100%;
  padding: 14px;
  margin-bottom: 12px;
  background: #0d0d0d;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
}
input:focus { outline: none; border-color: var(--gold); }

.btn-primary {
  width: 100%;
  padding: 14px;
  background: var(--money-green);
  color: #06210f;
  font-weight: 700;
  font-size: 15px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 4px;
}
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  padding: 10px 16px;
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold);
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

.switch-link { text-align: center; margin-top: 14px; color: var(--text-dim); font-size: 14px; }
.switch-link a { color: var(--money-green); cursor: pointer; font-weight: 600; }
.error-text { color: #ff5555; font-size: 13px; margin-top: 8px; text-align: center; }
.success-text { color: var(--money-green); font-size: 13px; margin-top: 8px; }

/* ---------- APP SHELL ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.logout-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}

.view { display: none; padding: 20px; padding-bottom: 100px; max-width: 480px; margin: 0 auto; }
.view.active { display: block; }
.view-title { margin-bottom: 16px; font-size: 20px; }

/* ---------- GOLD CARD ---------- */
.gold-card {
  background: linear-gradient(135deg, #ffe27a 0%, #FFC300 35%, #b8860b 70%, #FFC300 100%);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(255, 195, 0, 0.25);
  margin-bottom: 20px;
  color: #2a1e00;
}
.gold-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
#card-username { font-size: 18px; font-weight: 800; }
.rank-pill {
  background: rgba(0,0,0,0.25);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}
.gold-card-coins { display: flex; align-items: baseline; gap: 8px; }
#card-coins { font-size: 40px; font-weight: 900; }
.coin-label { font-size: 13px; font-weight: 600; opacity: 0.8; }

/* ---------- MESSAGE CENTER ---------- */
.message-center {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 20px;
}
.message-center h3 { font-size: 15px; margin-bottom: 10px; }
.message-list { display: flex; flex-direction: column; gap: 8px; max-height: 160px; overflow-y: auto; }
.message-item {
  background: #0d0d0d;
  border-left: 3px solid var(--money-green);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
}
.message-item .msg-date { color: var(--text-dim); font-size: 11px; margin-top: 4px; }
.empty-text { color: var(--text-dim); font-size: 13px; }

/* ---------- EARN BUTTON ---------- */
.earn-btn {
  width: 100%;
  padding: 22px;
  background: var(--money-green);
  color: #06210f;
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 1px;
  border: none;
  border-radius: 16px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 214, 50, 0.3);
}
.earn-btn:active { transform: scale(0.97); }
.earn-btn:disabled {
  background: #2a2a2a;
  color: #666;
  box-shadow: none;
  cursor: not-allowed;
}
.cooldown-text { text-align: center; margin-top: 10px; color: var(--text-dim); font-size: 13px; }

/* ---------- LEADERBOARD ---------- */
.leaderboard-list { display: flex; flex-direction: column; gap: 8px; }
.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
}
.leaderboard-item .rank-num { font-weight: 800; color: var(--gold); width: 24px; }
.leaderboard-item .lb-name { flex: 1; font-weight: 600; }
.leaderboard-item .lb-coins { color: var(--money-green); font-weight: 700; }
.leaderboard-item.me { border-color: var(--money-green); }

/* ---------- PROFILE ---------- */
.profile-card, .profile-stats, .referral-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  margin-bottom: 16px;
}
.profile-card label { font-size: 12px; color: var(--text-dim); display: block; margin-bottom: 6px; }
.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.stat-row:last-child { border-bottom: none; }
.referral-card h3 { margin-bottom: 4px; }
.referral-card p { color: var(--text-dim); font-size: 13px; margin-bottom: 12px; }
.referral-code-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #0d0d0d;
  padding: 12px 16px;
  border-radius: 10px;
}
#referral-code { font-family: monospace; font-size: 18px; font-weight: 700; color: var(--gold); letter-spacing: 2px; }

/* ---------- BOTTOM NAV ---------- */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  padding: 8px 0;
  padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
}
.nav-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  font-size: 11px;
  padding: 6px;
  cursor: pointer;
}
.nav-btn span { font-size: 11px; }
.nav-btn.active { color: var(--money-green); }