:root { --primary: #2563eb; --dark: #1e293b; --light: #f8fafc; --gray: #cbd5e1; }
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background-color: var(--light); color: var(--dark); line-height: 1.6; }
.container { width: 90%; max-width: 1100px; margin: 0 auto; padding: 1rem 0; }
.flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.navbar { background: #fff; box-shadow: 0 2px 4px rgba(0,0,0,0.1); padding: 1rem 0; }
.logo { font-size: 1.5rem; font-weight: bold; text-decoration: none; color: var(--dark); }
.logo span { color: var(--primary); }
nav a { margin-left: 1rem; text-decoration: none; color: var(--dark); font-weight: 500; }
.hero { background: var(--dark); color: #fff; text-align: center; padding: 4rem 0; }
.btn { display: inline-block; background: var(--primary); color: #fff; padding: 0.5rem 1.5rem; text-decoration: none; border-radius: 4px; border: none; cursor: pointer; margin-top:1rem;}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.card { background: #fff; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.05); text-decoration: none; color: inherit; display: block; border: 1px solid var(--gray); transition: 0.3s; }
.card:hover { border-color: var(--primary); transform: translateY(-3px); }
.ad-slot { background: #e2e8f0; text-align: center; padding: 1.5rem; margin: 1.5rem auto; border: 1px dashed #94a3b8; color: #64748b; }
.footer { background: var(--dark); color: #fff; padding: 2rem 0; margin-top: 3rem; }
.footer-links a { color: #fff; text-decoration: none; margin-left: 1rem; font-size: 0.9rem; }
.tool-input { width: 100%; padding: 0.8rem; border: 1px solid var(--gray); border-radius: 4px; font-size: 1rem; }
.mt-1 { margin-top: 1rem; } .mt-2 { margin-top: 2rem; }
.bg-light { background: #f1f5f9; }
.page-content { background: #fff; padding: 2rem; margin-top: 2rem; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }