body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #fff;
    color: #232323;
    min-height: 100vh;
  }
  
  .container {
    max-width: 500px;
    margin: 48px auto 0 auto;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 3px 24px rgba(179,0,0,0.09);
    padding: 36px 28px 36px 28px;
    text-align: center;
  }
  
  h1 {
    font-size: 2rem;
    color: #b30000;
    text-align: center;
    margin-top: 0;
    margin-bottom: 18px;
    letter-spacing: 0.01em;
  }
  
  .donate-title {
    font-size: 1.16rem;
    color: #444;
    margin-bottom: 22px;
  }
  
  .donate-card {
    margin: 0 auto;
    padding: 24px 14px 18px 14px;
    background: #faf7f7;
    border-radius: 14px;
    box-shadow: 0 1px 8px rgba(179,0,0,0.08);
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: flex-start;
    max-width: 430px;
  }
  
  .donate-addr-block {
    width: 100%;
    margin-bottom: 0;
  }
  
  .donate-label {
    font-size: 1.04em;
    font-weight: bold;
    color: #b30000;
    display: flex;
    align-items: center;
    margin-bottom: 3px;
    gap: 7px;
  }
  
  .donate-coin-logo {
    height: 22px;
    width: 22px;
    vertical-align: middle;
    margin-right: 7px;
    margin-bottom: 3px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    border: 1.2px solid #eee;
  }
  
  .donate-addr {
    font-family: monospace;
    font-size: 1.05em;
    background: #fff;
    color: #2b2b2b;
    padding: 7px 11px;
    border-radius: 7px;
    border: 1.2px dashed #e7dddd;
    display: inline-block;
    margin-right: 7px;
    margin-top: 2px;
    user-select: all;
    letter-spacing: 0.02em;
  }
  
  .copy-btn {
    background: #fff;
    border: 2px solid #b30000;
    color: #b30000;
    border-radius: 7px;
    font-weight: bold;
    font-size: 0.97em;
    padding: 5px 20px;
    margin-left: 3px;
    cursor: pointer;
    transition: background 0.14s, color 0.14s, border 0.14s;
  }
  .copy-btn:hover {
    background: #b30000;
    color: #fff;
    border-color: #b30000;
  }
  .copy-success {
    color: #13d375;
    margin-left: 10px;
    font-size: 0.97em;
    display: none;
  }
  
  footer {
    text-align: center;
    margin-top: 38px;
    margin-bottom: 16px;
    color: #888;
    font-size: 1em;
  }
  footer a {
    color: #b30000;
    text-decoration: underline;
    font-weight: 600;
  }
  
  .theme-toggle {
    position: fixed;
    top: 18px;
    right: 18px;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    z-index: 20;
    color: #b30000;
    transition: color 0.15s;
  }
  .theme-toggle:hover {
    color: #e60000;
  }
  
  .home-logo {
    position: fixed;
    top: 18px;
    left: 18px;
    z-index: 20;
    display: block;
  }
  .home-logo img {
    height: 38px;
    width: auto;
    border-radius: 10px;
    border: 2px solid #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  }
  
  /* Responsive */
  @media (max-width: 600px) {
    .container { padding: 9px 1vw 12px 1vw; }
    .donate-card { padding: 12px 2vw 10px 2vw; }
    .theme-toggle, .home-logo { top: 10px; left: 10px; right: unset; }
    .donate-coin-logo { height: 18px; width: 18px; }
  }
  
  /* Dark mode */
  body.dark {
    background: #181818;
    color: #ededed;
  }
  body.dark .container {
    background: #222;
    box-shadow: 0 3px 18px rgba(179,0,0,0.17);
  }
  body.dark .donate-card {
    background: #232324;
    box-shadow: 0 1px 14px rgba(179,0,0,0.11);
  }
  body.dark h1, body.dark .donate-label { color: #ff5c5c; }
  body.dark .donate-addr {
    background: #191919;
    color: #ededed;
    border-color: #363636;
  }
  body.dark .copy-btn {
    background: #181818;
    border-color: #ff5c5c;
    color: #ff5c5c;
  }
  body.dark .copy-btn:hover {
    background: #ff5c5c;
    color: #19191a;
  }
  body.dark .donate-coin-logo {
    background: #191919;
    border: 1.2px solid #232324;
  }
  body.dark footer a { color: #ff5c5c; }
  body.dark .theme-toggle { color: #ff5c5c; }
  body.dark .theme-toggle:hover { color: #fff; }