:root { --p: #4F46E5; --s: #0F172A; --bg: #F8FAFC; --text: #334155; }
* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', system-ui, sans-serif; }
body { background: var(--bg); color: var(--text); line-height: 1.6; }

header { background: #fff; border-bottom: 1px solid #e2e8f0; padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; }
.logo { font-weight: 800; font-size: 1.5rem; color: var(--s); text-decoration: none; }
nav a { margin-left: 20px; text-decoration: none; color: var(--text); font-weight: 500; font-size: 0.9rem; transition: 0.3s; }
nav a:hover { color: var(--p); }

.hero { padding: 80px 5%; text-align: center; background: white; border-bottom: 1px solid #e2e8f0; }
.hero h1 { font-size: 2.5rem; color: var(--s); margin-bottom: 15px; }

.container { max-width: 1000px; margin: -40px auto 40px; padding: 0 20px; }
.tool-card { background: #fff; padding: 30px; border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.05); }

textarea { width: 100%; height: 200px; padding: 15px; border: 1px solid #cbd5e1; border-radius: 8px; font-family: monospace; margin-bottom: 20px; resize: vertical; }
.btn-group { display: flex; gap: 10px; margin-bottom: 20px; }
button { background: var(--p); color: #fff; border: none; padding: 12px 25px; border-radius: 6px; cursor: pointer; font-weight: 600; transition: 0.3s; }
button:hover { opacity: 0.9; transform: translateY(-1px); }

.ad-placeholder { background: #f1f5f9; border: 1px dashed #cbd5e1; margin: 25px 0; text-align: center; padding: 15px; font-size: 0.8rem; color: #94a3b8; border-radius: 8px; }

.docs-section { margin-top: 50px; background: #fff; padding: 30px; border-radius: 12px; }
footer { background: var(--s); color: #fff; padding: 50px 5%; text-align: center; margin-top: 100px; }