/* AQCode - 开发者工具站 */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #334155;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: #334155;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
  --radius: 8px;
  --sidebar-width: 260px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width); background: var(--bg-card);
  position: fixed; top: 0; left: 0; bottom: 0;
  overflow-y: auto; border-right: 1px solid var(--border);
}

.sidebar-logo { padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.sidebar-logo h1 { font-size: 20px; padding: 20px 0 5px; color: var(--primary); }
.sidebar-logo p { font-size: 12px; color: var(--text-secondary); }

.sidebar-nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px; color: var(--text-secondary);
  transition: all 0.2s; font-size: 14px;
}
.sidebar-nav a:hover, .sidebar-nav a.active { background: var(--bg-input); color: var(--text); text-decoration: none; }
.sidebar-nav a.active { border-right: 3px solid var(--primary); }

.sidebar-section { padding: 10px 20px 5px; font-size: 11px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; margin-top: 10px; }

.main { margin-left: var(--sidebar-width); flex: 1; padding: 30px 40px; padding-bottom: 60px; }

.tool-header { margin-bottom: 24px; }
.tool-header h1 { font-size: 24px; margin-bottom: 8px; }
.tool-header p { color: var(--text-secondary); font-size: 14px; }

.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }

.tool-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  text-decoration: none; transition: all 0.2s; display: block;
}
.tool-card:hover { border-color: var(--primary); transform: translateY(-2px); text-decoration: none; }
.tool-card .icon { font-size: 28px; margin-bottom: 12px; font-weight: bold; color: var(--primary); font-family: monospace; }
.tool-card h3 { font-size: 16px; margin-bottom: 6px; }
.tool-card p { font-size: 13px; color: var(--text-secondary); }

.tool-content { display: flex; flex-direction: column; gap: 16px; }
.input-group { display: flex; flex-direction: column; gap: 8px; }

.textarea-header { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); }
.textarea-header span { margin-right: auto; }

textarea, input[type="text"], input[type="number"], input[type="datetime-local"] {
  background: var(--bg-input); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px; font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
  font-size: 14px; resize: vertical; width: 100%;
}
textarea:focus, input:focus { outline: none; border-color: var(--primary); }

.btn { background: var(--primary); color: white; border: none; padding: 8px 16px; border-radius: var(--radius); cursor: pointer; font-size: 14px; white-space: nowrap; }
.btn:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--bg-input); color: var(--text); }
.btn-secondary:hover { background: var(--border); }
select.btn-secondary { appearance: auto; }

.toast {
  position: fixed; top: 20px; right: 20px;
  background: var(--success); color: white; padding: 12px 20px;
  border-radius: var(--radius); font-size: 14px; z-index: 1000;
  animation: slideIn 0.3s ease;
}
@keyframes slideIn { from { transform: translateX(100px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.error { color: var(--error); font-size: 13px; margin-top: 4px; }

.footer {
  position: fixed; bottom: 0; left: var(--sidebar-width); right: 0;
  padding: 12px 40px; border-top: 1px solid var(--border);
  text-align: center; font-size: 12px; color: var(--text-secondary);
  background: var(--bg); z-index: 100;
}
.footer a { color: var(--text-secondary); }
.footer a:hover { color: var(--text); text-decoration: none; }

@media (max-width: 768px) {
  .sidebar { width: 100%; position: relative; border-right: none; border-bottom: 1px solid var(--border); }
  .main { margin-left: 0; padding: 20px; }
  .tool-grid { grid-template-columns: 1fr; }
  .footer { position: relative; left: 0; }
  .layout { flex-direction: column; }
}