/* --- Değişkenler ve Reset (German Precision Palette) --- */
:root {
    --sidebar-width: 260px;
    
    /* Renkler */
    --color-bg: #121212;        /* Çok Koyu Grafit */
    --color-sidebar: #0a0a0a;   /* Neredeyse Siyah */
    --color-text: #E0E0E0;      /* Soğuk Açık Gri */
    --color-primary: #007BFF;   /* Elektrik Mavisi */
    --color-primary-dark: #0056b3;
    --color-card-bg: #1E1E1E;   /* Koyu Gri Kartlar */
    --color-border: #333333;
    
    /* Fontlar */
    --font-heading: 'Khand', sans-serif; /* Güçlü, Teknik, Geometrik */
    --font-body: 'Open Sans', sans-serif; /* Temiz, Okunaklı */
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-weight: 300;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
img { max-width: 100%; display: block; filter: grayscale(30%); } /* Hafif gri tonlama ile endüstriyel his */
ul { list-style: none; }

/* --- Ana Düzen --- */
.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

/* --- Sol Sidebar (Teknolojik) --- */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-sidebar);
    color: #fff;
    position: fixed;
    height: 100vh;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow-y: auto;
    border-right: 1px solid var(--color-border);
}

.brand {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: #fff;
    letter-spacing: 2px;
    text-transform: uppercase;
    position: relative;
    display: flex;
    align-items: center;
}
.pulse-dot {
    width: 10px; height: 10px;
    background-color: var(--color-primary);
    border-radius: 50%;
    margin-left: 10px;
    box-shadow: 0 0 10px var(--color-primary);
    animation: pulse 2s infinite;
}
@keyframes pulse { 0% { opacity: 0.5; } 50% { opacity: 1; } 100% { opacity: 0.5; } }

.nav-menu li { margin-bottom: 5px; }
.nav-menu a {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: #888;
    display: block;
    padding: 10px 15px;
    text-transform: uppercase;
    transition: all 0.2s;
    letter-spacing: 1px;
}
.nav-menu a:hover, .nav-menu a.active {
    color: var(--color-primary);
    background: rgba(0, 123, 255, 0.05);
    border-left: 3px solid var(--color-primary);
    padding-left: 12px;
}

.sidebar-footer {
    margin-top: auto;
    font-size: 0.9rem;
    color: #666;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}
.phone-link { display: block; margin-top: 5px; color: #fff; font-weight: 600; letter-spacing: 1px; }
.status { color: var(--color-primary); font-size: 0.8rem; margin-top: 10px; font-weight: bold; text-transform: uppercase; }

/* --- Sağ Ana İçerik --- */
.main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    display: flex;
    flex-direction: column;
}

/* --- Hero & Header --- */
.hero-header, .page-header {
    height: 70vh;
    background-size: cover;
    background-position: center;
    position: relative;
    border-bottom: 2px solid var(--color-primary);
}
.page-header.compact { height: 40vh; }

.overlay {
    background: linear-gradient(90deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 100%);
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding-left: 80px;
    color: #fff;
}

.hero-text { max-width: 700px; }

.hero-header h1, .page-header h1 {
    font-family: var(--font-heading);
    font-size: 5rem;
    margin-bottom: 10px;
    line-height: 0.95;
    font-weight: 700;
    text-transform: uppercase;
}
.highlight { color: var(--color-primary); }

.subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 30px;
    color: #ccc;
    max-width: 600px;
    border-left: 2px solid var(--color-primary);
    padding-left: 15px;
}

/* --- İçerik Konteyneri --- */
.content-container {
    max-width: 1200px; 
    margin: 0 auto;
    padding: 80px 50px;
    width: 100%;
}

/* --- Tipografi ve Bölümler --- */
.text-section { margin-bottom: 80px; }
h2 { 
    font-family: var(--font-heading); 
    font-size: 3rem; 
    margin-bottom: 30px; 
    color: #fff;
    text-transform: uppercase;
    font-weight: 600;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 10px;
    display: inline-block;
}
h3 { font-family: var(--font-heading); font-size: 1.8rem; margin-bottom: 15px; color: #fff; text-transform: uppercase; }
p { margin-bottom: 20px; font-size: 1rem; color: #bbb; text-align: justify; }

.bg-graphite {
    background-color: #1a1a1a;
    padding: 60px;
    border: 1px solid var(--color-border);
    border-left: 5px solid var(--color-primary);
}

/* --- Grid ve Kartlar (Teknik Görünüm) --- */
.grid-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
}

.grid-card {
    background: var(--color-card-bg);
    padding: 30px;
    border: 1px solid var(--color-border);
    transition: 0.3s;
    position: relative;
}
.grid-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 0 15px rgba(0, 123, 255, 0.1);
}

.icon-box { color: var(--color-primary); margin-bottom: 20px; }

/* Split Layout */
.split-layout {
    display: flex;
    gap: 50px;
    align-items: center;
    margin-bottom: 80px;
}
.split-layout img { width: 45%; border-radius: 2px; border: 1px solid var(--color-primary); }
.split-layout .split-content { width: 55%; }

/* --- Formlar --- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.form-group { margin-bottom: 25px; }
label { display: block; margin-bottom: 5px; font-weight: 600; color: var(--color-primary); font-family: var(--font-heading); font-size: 1.1rem; text-transform: uppercase; }
input, select, textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--color-border);
    background: #000;
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    border-radius: 0;
}
input:focus, textarea:focus { border-color: var(--color-primary); outline: none; background: #0a0a0a; }

.btn {
    display: inline-block;
    padding: 15px 40px;
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 1.2rem;
    border: none;
    cursor: pointer;
    transition: 0.3s;
    letter-spacing: 1px;
    border-radius: 0; /* Keskin */
}
.btn-blue { background-color: var(--color-primary); color: #fff; }
.btn-blue:hover { background-color: var(--color-primary-dark); }
.btn-outline { background: transparent; border: 1px solid var(--color-primary); color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.full-width { width: 100%; }

/* --- Yorumlar --- */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.review-card {
    background: #151515;
    padding: 30px;
    border-top: 3px solid var(--color-primary);
}
.stars { color: var(--color-primary); margin-bottom: 15px; font-size: 1.2rem; }
blockquote { font-style: italic; color: #ccc; margin-bottom: 20px; font-size: 1rem; }
cite { font-weight: 600; font-size: 0.9rem; display: block; color: #fff; font-family: var(--font-heading); text-transform: uppercase; }

/* --- Footer --- */
.page-footer {
    padding: 40px;
    text-align: center;
    border-top: 1px solid #333;
    color: #666;
    font-size: 0.9rem;
    margin-top: auto;
    background: #080808;
}

.blue-line { border: 0; height: 2px; background: var(--color-primary); margin: 20px 0; width: 100px; }

/* --- Mobil Menü Butonu --- */
.menu-toggle { display: none; }

/* --- Responsive Tasarım (Mobil) --- */
@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
        width: 100%;
        transition: transform 0.3s ease;
        padding-top: 80px;
    }
    .sidebar.active { transform: translateX(0); }
    
    .main-content { margin-left: 0; width: 100%; }
    
    .menu-toggle {
        display: block;
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 1001;
        background: #000;
        border: 1px solid var(--color-primary);
        width: 50px;
        height: 50px;
        cursor: pointer;
    }
    .bar {
        display: block;
        width: 25px;
        height: 2px;
        background: var(--color-primary);
        margin: 6px auto;
    }

    .hero-header h1 { font-size: 3rem; }
    .overlay { padding-left: 30px; padding-right: 30px; align-items: center; text-align: center; }
    .content-container { padding: 40px 20px; }
    .split-layout, .contact-layout { display: block; }
    .split-layout img, .split-layout .split-content { width: 100%; }
    .split-layout img { margin-bottom: 20px; }
    .grid-card { margin-bottom: 30px; }
}