:root { --bg:#f5f7fb; --fg:#1b2430; --card:#fff; --accent:#2257e6; --muted:#6a7485; --border:#dce2ed; }
@media (prefers-color-scheme: dark) { :root { --bg:#0f1115; --fg:#e6e9ef; --card:#171b22; --accent:#7aa2ff; --muted:#9aa4b5; --border:#2a313d; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg); font:16px/1.5 system-ui,sans-serif; }
.container { max-width: 760px; margin: 2rem auto; padding: 0 1rem; }
.card { background:var(--card); border:1px solid var(--border); border-radius:14px; padding:1.25rem; box-shadow:0 4px 20px rgba(0,0,0,.04); }
textarea,input,select,button { width:100%; padding:.65rem .75rem; border:1px solid var(--border); border-radius:10px; background:transparent; color:inherit; }
button,a { cursor:pointer; }
button { background:var(--accent); color:#fff; border:none; margin-top:.75rem; }
a { color:var(--accent); text-decoration:none; }
.checkbox { display:flex; gap:.5rem; align-items:center; }
.checkbox input { width:auto; }
.hidden { display:none; }
.dropzone { margin:.5rem 0; border:2px dashed var(--border); border-radius:10px; padding:.75rem; color:var(--muted); text-align:center; }
.file-list,.attachments { list-style:none; padding:0; margin:.5rem 0; }
.file-list li,.attachments li { display:flex; justify-content:space-between; gap:.75rem; overflow:hidden; }
.result-url,.secret-text { padding:.75rem; border:1px solid var(--border); border-radius:10px; background:var(--bg); overflow:auto; }
.secret-text { white-space:pre-wrap; word-break:break-word; }
.hint { color:var(--muted); font-size:.92rem; }
.error { background:#ffd8d8; color:#8b1a1a; padding:.5rem .75rem; border-radius:8px; margin:.5rem 0; }