:root {
  --bg: #fff;
  --bg2: #eaeaea;
  --fg: #111;
  --accent: #7b3fe4;
  --muted: #666;
  --border: #bbb;
}
.dark {
  --bg: #000;
  --bg2: #111;
  --fg: #e0e0e0;
  --accent: #f59e0b;
  --muted: #666;
  --border: #333;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { background: var(--bg); }
body {
  font-family: 'Fira Code', monospace;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; max-height: 80vh; object-fit: contain; }

/* Scrollbar — force classic (non-overlay) style */
::-webkit-scrollbar { width: 18px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 9px; border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }
* { scrollbar-width: auto; scrollbar-color: var(--border) var(--bg); scrollbar-gutter: stable; }

/* Signer modal */
.signer-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
}
.signer-card {
  background: var(--bg);
  border-radius: 8px;
  width: 360px; max-height: 80vh;
  overflow-y: auto;
  padding: 0;
}
.signer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}
.signer-header h2 { font-size: 16px; font-weight: bold; }
.signer-close {
  background: transparent; border: none;
  color: var(--fg); font-size: 20px; cursor: pointer;
  line-height: 1;
}
.signer-content { padding: 16px; }
.signer-content p { margin-bottom: 12px; color: var(--muted); font-size: 13px; }
.signer-input {
  width: 100%; padding: 8px 12px;
  background: var(--bg2); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px;
  font-family: inherit; font-size: 13px;
  margin-bottom: 8px;
}
.signer-btn {
  width: 100%; padding: 8px;
  background: var(--accent); color: #fff;
  border: none; border-radius: 4px;
  font-family: inherit; font-size: 13px;
  cursor: pointer;
  margin-top: 4px;
}
.signer-btn:hover { opacity: 0.9; }
.signer-btn-secondary {
  background: transparent; color: var(--muted);
  border: 1px solid var(--border);
  margin-top: 16px;
}
.signer-btn-sm {
  padding: 4px 12px;
  background: var(--bg2); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px;
  font-family: inherit; font-size: 12px;
  cursor: pointer;
}
.signer-identity {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.signer-identity > span:last-child { display: flex; gap: 4px; }
.signer-add {
  display: flex; gap: 8px;
  margin-top: 16px;
}
.signer-add .signer-input { margin-bottom: 0; flex: 1; }
.signer-add .signer-btn { width: auto; margin-top: 0; }
.signer-sep { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.signer-msg { color: var(--accent); }
.signer-textarea {
  resize: vertical; min-height: 60px;
  font-family: monospace;
}
.signer-warn {
  color: var(--accent); font-weight: bold; font-size: 12px;
  padding: 8px; background: rgba(255,100,50,0.1);
  border-radius: 4px; border: 1px solid var(--accent);
}
.signer-mnemonic {
  display: grid; grid-template-columns: 1fr 1fr 1fr;
  gap: 6px; margin: 12px 0;
}
.signer-word {
  background: var(--bg2); padding: 6px 8px;
  border-radius: 4px; font-size: 13px;
  font-family: monospace;
}
.signer-actions {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 16px;
}
.signer-actions .signer-btn-secondary {
  flex: 1; margin-top: 0;
}
.signer-btn-danger {
  background: transparent; color: var(--accent);
  border: 1px solid var(--accent);
}