/* style.css */
:root {
    --primary: #0a192f; /* Derin Lacivert (Güven) */
    --secondary: #007bff; /* Teknoloji Mavisi */
    --accent: #64ffda; /* Yeşil/Turkuaz (Pozitif Finans) */
    --text-dark: #333;
    --text-light: #8892b0;
    --bg-light: #f4f7f6;
    --white: #ffffff;
}

body { font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; margin: 0; padding: 0; background: var(--bg-light); color: var(--text-dark); line-height: 1.7; }
h1, h2, h3 { color: var(--primary); font-weight: 700; margin-bottom: 15px; }
a { text-decoration: none; color: var(--primary); transition: 0.3s; }

/* Header */
header { background: var(--white); padding: 20px 5%; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 2px 20px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 1000; }
.logo { font-size: 1.5rem; font-weight: bold; display: flex; align-items: center; gap: 10px; color: var(--primary); }
.nav-links a { margin-left: 20px; font-weight: 500; font-size: 0.95rem; }
.btn-cta { background: var(--secondary); color: white; padding: 10px 25px; border-radius: 5px; font-weight: bold; }
.btn-cta:hover { background: var(--primary); color: var(--accent); }

/* Hero Section */
.hero { background: linear-gradient(135deg, var(--primary) 0%, #112240 100%); color: white; padding: 80px 5%; text-align: center; }
.hero h1 { color: white; font-size: 2.5rem; margin-bottom: 20px; }
.hero p { color: var(--text-light); max-width: 700px; margin: 0 auto 30px; font-size: 1.2rem; }

/* Layout */
.container { max-width: 1200px; margin: 50px auto; display: grid; grid-template-columns: 3fr 1fr; gap: 40px; padding: 0 20px; }

/* Article Styling */
.content-area { background: var(--white); padding: 40px; border-radius: 8px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
.content-area h2 { border-left: 5px solid var(--secondary); padding-left: 15px; margin-top: 40px; }
.content-area ul { margin-bottom: 20px; }
.content-area li { margin-bottom: 10px; }

/* Sidebar (Demo Hesaplama Aracı) */
.sidebar { position: sticky; top: 100px; height: fit-content; }
.calc-widget { background: var(--primary); color: white; padding: 30px; border-radius: 8px; }
.calc-input { width: 100%; padding: 10px; margin: 10px 0 20px; border-radius: 4px; border: none; }
.calc-btn { width: 100%; background: var(--accent); color: var(--primary); border: none; padding: 12px; font-weight: bold; cursor: pointer; border-radius: 4px; }
/* Hesaplama Sonuç Modalı */
.result-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(10, 25, 47, 0.9); z-index: 2000; align-items: center; justify-content: center; }
.result-box { background: white; padding: 40px; border-radius: 10px; text-align: center; width: 90%; max-width: 400px; position: relative; animation: slideUp 0.4s ease; }
.score-circle { width: 120px; height: 120px; border-radius: 50%; border: 8px solid #ddd; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: bold; color: var(--primary); position: relative; }
.status-text { font-size: 1.2rem; font-weight: bold; margin-bottom: 10px; }
.close-modal { position: absolute; top: 15px; right: 20px; font-size: 1.5rem; cursor: pointer; color: #999; }
@keyframes slideUp { from { transform: translateY(50px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
/* Footer */
footer { background: #020c1b; color: var(--text-light); padding: 50px 5%; text-align: center; margin-top: 50px; border-top: 3px solid var(--secondary); }

@media (max-width: 768px) { .container { grid-template-columns: 1fr; } .hero h1 { font-size: 2rem; } }