:root{
  --bg:#0f1720;
  --panel:#0b1220;
  --muted:#9aa4b2;
  --accent:#38bdf8;
  --text:#e6eef6;
}
html,body,#app,app{height:100%;}
body{margin:0;font-family:Inter,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
.app-root{display:flex;flex-direction:column;height:100vh}
.content{flex:1;display:flex;flex-direction:column}
.toolbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:linear-gradient(180deg,rgba(255,255,255,0.02),transparent);border-bottom:1px solid rgba(255,255,255,0.03)}
.toolbar .meta{display:flex;align-items:center;gap:10px}
.brand-title{font-family:Georgia,"Times New Roman",serif;font-size:24px;line-height:1;color:var(--text);letter-spacing:0.3px}
.timer-text{font-size:11px;color:var(--muted);white-space:nowrap}
.timer-value{font-size:12px;font-weight:700;color:#d9f3ff}
.actions{display:flex;align-items:center;gap:8px}
.expire-label{font-size:12px;color:var(--muted)}
.expire-input{width:56px;background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.08);border-radius:6px;color:var(--text);padding:7px 6px;font-size:13px}
.expire-input:focus{outline:none;border-color:rgba(56,189,248,0.7);box-shadow:0 0 0 2px rgba(56,189,248,0.15)}
.btn{background:var(--accent);color:#042038;border:0;padding:8px 12px;border-radius:6px;font-weight:600;margin-left:0}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;padding:0}
.copy-btn{background:#22c55e;color:#06240f}
.copy-btn:hover{background:#16a34a}
.btn.danger{background:#ef4444;color:#fff}
.btn.danger:hover{background:#dc2626}
.editor{flex:1;border:0;background:transparent;color:var(--text);font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Segoe UI Mono", monospace;font-size:14px;padding:16px;height:calc(100vh - 64px);resize:none;outline:none}
@media (max-width:600px){.toolbar{padding:8px}.toolbar .meta{gap:8px}.brand-title{font-size:20px}.expire-label{display:none}.expire-input{width:52px}.btn{margin-left:0}.editor{font-size:13px;padding:12px;height:calc(100vh - 56px)}}