:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #0b0f14;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2ea043;
  --accent-hover: #3fb950;
  --danger: #f85149;
  --code: #c9d1d9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 28px 20px;
  background: linear-gradient(180deg, #0f1620, var(--bg));
}

.brand {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo { font-size: 40px; line-height: 1; }

.site-header h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.3px;
}

.tagline {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.container {
  max-width: 860px;
  margin: 28px auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}

.input-row {
  display: flex;
  gap: 10px;
}

input[type="url"] {
  flex: 1;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px 14px;
  font-size: 15px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

input[type="url"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(46, 160, 67, 0.25);
}

.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, background 0.15s;
}

.btn:hover { border-color: var(--muted); }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.status {
  min-height: 18px;
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.status.error { color: var(--danger); }
.status.success { color: var(--accent-hover); }

.result-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.meta { font-size: 13px; color: var(--muted); }
.actions { display: flex; gap: 8px; }

.code-box {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 0;
  max-height: 520px;
  overflow: auto;
}

.code-box code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--code);
  white-space: pre;
}

.settings {
  margin-top: 16px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.settings summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  user-select: none;
}

.settings summary:hover { color: var(--text); }

.settings .field-label { margin-top: 12px; }

.settings input[type="url"] { width: 100%; }

.hint {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.hidden { display: none; }

.site-footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 560px) {
  .input-row { flex-direction: column; }
}