/* --- Değişkenler (Green Whisper - Dark Mode) --- */
:root {
    --bg-body: #0a0c0b;       /* Çok koyu, neredeyse siyah yeşil */
    --bg-card: #141716;       /* Kart arka planı */
    --text-main: #e0e0e0;     /* Kırık beyaz metin */
    --text-muted: #a0a0a0;    /* Gri metin */
    --primary-green: #4ade80; /* "Green Whisper" - Canlı ama yumuşak yeşil */
    --secondary-green: #166534; /* Koyu vurgu yeşili */
    --border-color: #2d3330;
    --max-width: 1200px;
    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* --- Temel Ayarlar --- */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { width: 100%; height: auto; display: block; border-radius: 8px; opacity: 0.9; }

/* --- Tipografi --- */
h1, h2, h3 { color: var(--primary-green); margin-bottom: 1rem; font-weight: 700; }
h1 { font-size: 2.5rem; line-height: 1.2; }
h2 { font-size: 2rem; border-left: 4px solid var(--primary-green); padding-left: 15px; }
p { margin-bottom: 1.5rem; color: var(--text-muted); }

/* --- Header --- */
header {
    background-color: rgba(10, 12, 11, 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo span { color: var(--primary-green); }

.nav-links { display: flex; gap: 30px; }
.nav-links a { font-weight: 500; font-size: 0.95rem; color: var(--text-main); }
.nav-links a:hover, .nav-links a.active { color: var(--primary-green); }

.burger { display: none; cursor: pointer; }
.burger div { width: 25px; height: 3px; background-color: var(--primary-green); margin: 5px; }

/* --- Genel Layout --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 60px 20px; flex: 1; }
.section { margin-bottom: 60px; }

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-green);
    color: var(--bg-body);
    font-weight: bold;
    border-radius: 4px;
    border: 1px solid var(--primary-green);
}
.btn:hover {
    background-color: transparent;
    color: var(--primary-green);
}

/* --- Grid Sistemleri --- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }

/* --- Kartlar --- */
.card {
    background-color: var(--bg-card);
    padding: 30px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: transform 0.3s, border-color 0.3s;
}
.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-green);
}
.icon-box svg { width: 40px; height: 40px; fill: var(--primary-green); margin-bottom: 20px; }

/* --- Formlar --- */
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; color: var(--primary-green); }
input, textarea, select {
    width: 100%;
    padding: 12px;
    background-color: var(--bg-body);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 4px;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-green);
}

/* --- Footer --- */
footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 50px 0 20px;
    margin-top: auto;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}
.footer-col h4 { color: var(--primary-green); margin-bottom: 15px; }
.footer-col a { display: block; margin-bottom: 8px; color: var(--text-muted); }
.footer-col a:hover { color: var(--primary-green); }
.german-phone { display: flex; align-items: center; gap: 10px; color: var(--text-main); font-weight: bold; }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links {
        position: absolute; top: 70px; right: 0;
        height: 100vh; width: 100%;
        background-color: var(--bg-body);
        flex-direction: column; align-items: center; justify-content: center;
        transform: translateX(100%); transition: 0.3s ease;
        border-top: 1px solid var(--border-color);
    }
    .nav-links.active { transform: translateX(0); }
    .burger { display: block; }
    .grid-2 { grid-template-columns: 1fr; }
    h1 { font-size: 2rem; }
    .footer-content { flex-direction: column; text-align: center; }
    .german-phone { justify-content: center; }
}