:root { --bg:#0b0f14; --card:#121822; --text:#e6edf3; --muted:#9aa7b3; --accent:#4ea1ff; --accent-2:#3ddc97; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, 'Helvetica Neue', Arial, 'Apple Color Emoji', 'Segoe UI Emoji'; background: var(--bg); color: var(--text); }
.container { max-width: 900px; margin: 0 auto; padding: 24px; }
header h1 { margin: 0 0 6px; font-weight: 700; }
.subtitle { margin: 0; color: var(--muted); }
.card { background: var(--card); border: 1px solid #1e2633; border-radius: 12px; padding: 16px; margin: 16px 0; box-shadow: 0 10px 30px rgba(0,0,0,0.25); }
label { display:block; margin-bottom: 8px; color: var(--muted); }
textarea { width: 100%; padding: 12px; border-radius: 8px; border: 1px solid #2a3445; background:#0f141c; color: var(--text); resize: vertical; }
button { margin-top: 12px; padding: 10px 16px; border-radius: 8px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #001018; border: none; font-weight: 700; cursor: pointer; }
.result h2 { margin-top: 0; }
.footer { color: var(--muted); }