/* --- MONO PRO DEĞİŞKENLERİ --- */
:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-gray: #f4f4f4;
    --border-color: #111111;
    --border-width: 1px;
    --max-width: 1200px;
    --font-heading: 'Playfair Display', serif; /* Otoriter Serif */
    --font-body: 'Inter', sans-serif;          /* Temiz Sans-Serif */
}

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

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

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&family=Playfair+Display:ital,wght@0,400;0,700;1,400&display=swap');

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }
img { width: 100%; height: auto; display: block; filter: grayscale(100%); transition: filter 0.3s; }
img:hover { filter: grayscale(0%); } /* Hover'da renklenir */

/* --- TİPOGRAFİ --- */
h1, h2, h3 {
    font-family: var(--font-heading);
    color: var(--text-color);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; border-bottom: 2px solid var(--text-color); padding-bottom: 10px; display: inline-block; }
p { margin-bottom: 20px; font-weight: 300; color: #333; }

/* --- HEADER --- */
header {
    border-bottom: var(--border-width) solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: var(--bg-color);
    z-index: 1000;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: 2px;
    border: 2px solid var(--text-color);
    padding: 5px 15px;
}

.nav-links { display: flex; gap: 30px; }

.nav-links a {
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    background-color: var(--text-color);
    color: var(--bg-color);
    padding: 2px 5px;
}

/* Mobile Menu */
.burger { display: none; cursor: pointer; font-size: 1.5rem; }

/* --- LAYOUTS --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 20px;
    flex: 1;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }

/* --- COMPONENTS --- */
.mono-card {
    border: 1px solid var(--text-color);
    padding: 30px;
    transition: transform 0.3s, background 0.3s;
}

.mono-card:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
    transform: translateY(-5px);
}

.mono-card:hover h3, .mono-card:hover p, .mono-card:hover strong { color: var(--bg-color); }
.mono-card:hover .icon-box svg { fill: var(--bg-color); }

.btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--text-color);
    color: var(--bg-color);
    font-family: var(--font-body);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid var(--text-color);
    cursor: pointer;
    transition: 0.3s;
}

.btn:hover {
    background-color: transparent;
    color: var(--text-color);
}

.icon-box svg { width: 40px; height: 40px; fill: var(--text-color); margin-bottom: 20px; }

/* --- HERO --- */
.hero {
    border-bottom: 1px solid var(--text-color);
    padding: 100px 20px;
    background: linear-gradient(rgba(255,255,255,0.9), rgba(255,255,255,0.9)), url('https://images.pexels.com/photos/4427430/pexels-photo-4427430.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1');
    background-size: cover;
    background-position: center;
}

/* --- FORMS --- */
.form-group { margin-bottom: 25px; }
label { display: block; margin-bottom: 8px; font-weight: 700; text-transform: uppercase; font-size: 0.8rem; }
input, textarea, select {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--text-color);
    background: transparent;
    font-family: inherit;
    font-size: 1rem;
    border-radius: 0; /* Keskin köşeler */
}
input:focus, textarea:focus { outline: none; background: var(--accent-gray); }

/* --- FOOTER --- */
footer {
    background-color: var(--text-color);
    color: var(--bg-color);
    padding: 60px 0 20px;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.footer-col h4 { color: var(--bg-color); margin-bottom: 20px; font-family: var(--font-heading); font-size: 1.2rem; border-bottom: 1px solid #555; display: inline-block; padding-bottom: 5px; }
.footer-col a { display: block; margin-bottom: 10px; color: #ccc; }
.footer-col a:hover { color: #fff; text-decoration: underline; }

.tr-phone {
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute; top: 85px; left: 0; width: 100%;
        background-color: var(--bg-color);
        flex-direction: column; padding: 20px; text-align: center;
        border-bottom: 1px solid var(--text-color);
    }
    .nav-links.active { display: flex; }
    .burger { display: block; }
    
    .grid-2 { grid-template-columns: 1fr; }
    h1 { font-size: 2.5rem; }
    .footer-content { flex-direction: column; text-align: center; }
    .tr-phone { justify-content: center; }
}