:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --accent-color: #38bdf8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Navigasyon */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10%;
    background: rgba(15, 23, 42, 0.9);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav ul { display: flex; list-style: none; }
nav ul li { margin-left: 20px; }
nav ul li a { color: white; text-decoration: none; font-weight: bold; transition: 0.3s; }
nav ul li a:hover { color: var(--accent-color); }

/* Hero */
header {
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

header h1 { font-size: 3.5rem; margin-bottom: 10px; }
.highlight { color: var(--accent-color); }
.btn {
    margin-top: 20px;
    padding: 12px 30px;
    background: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: 0.3s;
}

/* Projeler */
#projects { padding: 80px 10%; }
.section-title { text-align: center; margin-bottom: 40px; font-size: 2rem; }

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.project-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    border-bottom: 4px solid var(--accent-color);
    transition: transform 0.3s;
}

.project-card:hover { transform: translateY(-10px); }
.project-card a { color: var(--accent-color); text-decoration: none; margin-top: 15px; display: inline-block; }

/* Footer */
footer {
    text-align: center;
    padding: 40px;
    background: #070b14;
}

.social-links { font-size: 1.5rem; margin-bottom: 20px; }
.social-links a { color: white; margin: 0 15px; transition: 0.3s; }
.social-links a:hover { color: var(--accent-color); }