:root { --primary: #667eea; --light: #f7fafc; --dark: #2d3748; --success: #48bb78; }
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; line-height: 1.6; color: var(--dark); background: #fff; }
.container { max-width: 1400px; margin: 0 auto; display: grid; grid-template-columns: 1fr 350px; gap: 40px; padding: 40px 20px; }
.hero { background: linear-gradient(135deg, var(--primary) 0%, rgba(0,0,0,0.1) 100%); color: white; padding: 40px; border-radius: 12px; margin-bottom: 40px; }
.hero h1 { font-size: 2rem; margin-bottom: 12px; }
.hero p { font-size: 1rem; opacity: 0.95; }
.tldr { background: var(--light); border-left: 4px solid var(--primary); padding: 20px; border-radius: 8px; margin-bottom: 40px; }
.tldr h3 { color: var(--primary); margin-bottom: 10px; font-size: 1rem; }
.tldr li { list-style: none; padding: 4px 0 4px 20px; position: relative; font-size: 0.95rem; }
.tldr li:before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: bold; }
h2 { font-size: 1.6rem; margin: 30px 0 15px 0; border-bottom: 2px solid var(--primary); padding-bottom: 8px; }
p { margin-bottom: 12px; line-height: 1.7; }
strong { color: var(--primary); font-weight: 600; }
.step { display: flex; gap: 15px; margin-bottom: 20px; padding: 15px; background: var(--light); border-radius: 8px; }
.step-number { flex-shrink: 0; width: 40px; height: 40px; background: var(--primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 1.1rem; }
.step-content h4 { margin-bottom: 5px; color: var(--dark); font-size: 1rem; }
.step-content p { margin: 0; font-size: 0.9rem; }
.tool-box { background: white; border: 2px solid var(--primary); border-radius: 12px; padding: 20px; position: sticky; top: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.tool-box h3 { color: var(--primary); margin: 0 0 15px 0; font-size: 1.1rem; }
.tool-section { margin-bottom: 15px; }
.tool-section label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.85rem; }
.tool-section input { width: 100%; padding: 8px; border: 1px solid #e2e8f0; border-radius: 6px; font-size: 0.9rem; }
.tool-btn { width: 100%; padding: 10px; background: var(--primary); color: white; border: none; border-radius: 6px; font-weight: 600; cursor: pointer; font-size: 0.9rem; }
ul { margin: 12px 0 12px 20px; }
li { margin-bottom: 6px; font-size: 0.95rem; }
.info-box { background: rgba(102, 126, 234, 0.05); border-left: 4px solid var(--primary); padding: 15px; border-radius: 6px; margin: 20px 0; font-size: 0.95rem; }
@media (max-width: 1024px) { .container { grid-template-columns: 1fr; } .sidebar { width: 100%; } .tool-box { position: relative; top: 0; } }