/* Minimal, clean UI with light/dark themes */
*{box-sizing:border-box}
:root{--bg:#ffffff;--fg:#111;--muted:#667;--card:#f6f7f9;--border:#e6e8ee;--primary:#3b82f6;--danger:#ef4444}
body.theme-dark{--bg:#0f1115;--fg:#eef1f4;--muted:#a6adbb;--card:#171923;--border:#232633;--primary:#60a5fa;--danger:#f87171}
body{margin:0;background:var(--bg);color:var(--fg);font:14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Kanit, Tahoma, sans-serif}
a{color:var(--primary);text-decoration:none}
.container.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;max-width:420px;width:100%;padding:24px;box-shadow:0 10px 30px rgba(0,0,0,.05)}
h1{margin-top:0;font-size:20px}
label{display:block;margin:10px 0 6px}
input[type=text],input[type=password],input[type=file],select{width:100%;padding:10px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--fg)}
.btn{display:inline-block;padding:8px 12px;border:1px solid var(--border);background:var(--bg);border-radius:10px;color:var(--fg);cursor:pointer}
.btn.primary{background:var(--primary);border-color:var(--primary);color:white}
.btn.small{padding:6px 10px;font-size:12px}
.btn.tiny{padding:3px 8px;font-size:11px}
.btn.danger{border-color:var(--danger);color:var(--danger)}
.alert{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.4);color:#b91c1c;padding:10px;border-radius:10px;margin:10px 0}
.muted{color:var(--muted)}
.topbar{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:10px 14px}
.pill{background:var(--card);border:1px solid var(--border);border-radius:999px;padding:4px 8px;margin-left:8px;font-size:12px}
.field-inline{display:inline-flex;align-items:center;gap:6px;margin-right:10px}
.layout{display:grid;grid-template-columns:280px 1fr;height:calc(100vh - 52px)}
.sidebar{border-right:1px solid var(--border);display:flex;flex-direction:column}
.toolbar{padding:10px;border-bottom:1px solid var(--border);display:flex;gap:8px;flex-wrap:wrap}
.file-list{overflow:auto;padding:8px}
.file-item{display:flex;justify-content:space-between;align-items:center;padding:6px 8px;border-radius:8px}
.file-item:hover{background:var(--card)}
.file-item.dir{opacity:.7}
.editor-pane{display:flex;flex-direction:column;height:100%}
.editor-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-bottom:1px solid var(--border)}
.editor{flex:1}
.pulse{animation:pulse .5s}
@keyframes pulse{0%{background:transparent}50%{background:rgba(96,165,250,.2)}100%{background:transparent}}