/* --- Variables & Reset (Modern Corporate Palette) --- */
:root {
    --sidebar-width: 260px;
    
    /* Farben */
    --color-bg: #F8FAFC;        /* Cool White/Grey */
    --color-sidebar: #0F172A;   /* Deep Navy Blue */
    --color-text: #334155;      /* Slate Grey */
    --color-heading: #1E293B;   /* Dark Slate */
    --color-cyan: #06B6D4;      /* Bright Cyan */
    --color-cyan-hover: #0891B2;
    --color-white: #FFFFFF;
    --color-border: #E2E8F0;
    
    /* Fonts */
    --font-heading: 'Poppins', sans-serif; /* Modern, Bold */
    --font-body: 'Inter', sans-serif;      /* Clean, UI-like */
}

* { 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: 400;
}

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

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

/* --- Sidebar (App Style) --- */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-sidebar);
    color: #94A3B8;
    position: fixed;
    height: 100vh;
    padding: 40px 25px;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    overflow-y: auto;
    border-right: 1px solid #1E293B;
}

.brand {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: var(--color-white);
    letter-spacing: 1px;
}
.dot-cyan { color: var(--color-cyan); font-size: 3rem; line-height: 0; position: relative; top: 5px; }

.nav-menu li { margin-bottom: 5px; }
.nav-menu a {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    color: #94A3B8;
    display: block;
    padding: 12px 15px;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-weight: 500;
}
.nav-menu a:hover, .nav-menu a.active {
    color: var(--color-white);
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--color-cyan);
}

.sidebar-footer {
    margin-top: auto;
    font-size: 0.85rem;
    color: #64748B;
    padding-top: 30px;
    border-top: 1px solid #1E293B;
}
.email-link { display: block; margin-top: 5px; color: var(--color-white); font-weight: 600; margin-bottom: 20px; }

.btn-sidebar {
    display: block;
    background: var(--color-cyan);
    color: #fff;
    text-align: center;
    padding: 10px;
    border-radius: 6px;
    font-weight: 600;
}
.btn-sidebar:hover { background: var(--color-cyan-hover); }

/* --- Main Content --- */
.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;
    /* Soft shadow below header */
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    z-index: 1;
}
.page-header.compact { height: 40vh; }

.overlay {
    background: linear-gradient(to right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.4));
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 80px;
    color: #fff;
}

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

.badge {
    background: rgba(6, 182, 212, 0.2);
    color: var(--color-cyan);
    padding: 5px 10px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.8rem;
    border: 1px solid var(--color-cyan);
    display: inline-block;
    margin-bottom: 20px;
}

.hero-header h1, .page-header h1 {
    font-family: var(--font-heading);
    font-size: 4rem;
    margin-bottom: 20px;
    font-weight: 700;
    line-height: 1.1;
    color: #fff;
}
.cyan-text { color: var(--color-cyan); }

.subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 40px;
    color: #CBD5E1;
}

/* --- Content Container --- */
.content-container {
    max-width: 1200px; 
    margin: 0 auto;
    padding: 80px 60px;
    width: 100%;
}

/* --- Typography & Sections --- */
.text-section { margin-bottom: 80px; }
h2 { 
    font-family: var(--font-heading); 
    font-size: 2.5rem; 
    margin-bottom: 25px; 
    color: var(--color-heading);
    font-weight: 600;
}
h3 { font-family: var(--font-heading); font-size: 1.5rem; margin-bottom: 10px; color: var(--color-heading); }
p { margin-bottom: 20px; text-align: justify; font-size: 1.05rem; }

.bg-light {
    background-color: #FFF;
    padding: 60px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-border);
}

/* --- Grid & Cards --- */
.grid-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.service-card {
    background: #FFF;
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: transform 0.3s;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.01);
}
.service-card:hover { transform: translateY(-5px); border-color: var(--color-cyan); box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05); }

.icon-box { font-size: 3rem; margin-bottom: 20px; }

/* Split Layout */
.split-layout {
    display: flex;
    gap: 60px;
    align-items: center;
}
.split-layout.reverse { flex-direction: row-reverse; }
.split-layout img { width: 100%; border-radius: 12px; box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); }
.split-content, .text-content, .image-content { flex: 1; }

.process-list li { margin-bottom: 15px; font-weight: 500; }
.process-list strong { color: var(--color-cyan); }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 30px; text-align: center; }
.stat strong { display: block; font-size: 2.5rem; color: var(--color-cyan); font-family: var(--font-heading); }
.stat span { font-size: 0.9rem; color: #64748B; }

/* --- Forms --- */
.contact-layout { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; }
.contact-info { background: #FFF; padding: 40px; border-radius: 12px; border: 1px solid var(--color-border); }
.contact-info h3 { color: var(--color-heading); font-size: 1.2rem; margin-bottom: 15px; }
.contact-info p { color: #64748B; }
.small-text { font-size: 0.85rem; color: #94A3B8; margin-top: 10px; }

.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--color-heading); font-size: 0.9rem; }
input, select, textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #CBD5E1;
    background: #F8FAFC;
    font-family: var(--font-body);
    font-size: 1rem;
    border-radius: 6px;
    transition: 0.2s;
}
input:focus, select:focus, textarea:focus { border-color: var(--color-cyan); outline: none; background: #FFF; box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1); }

.btn {
    display: inline-block;
    padding: 14px 35px;
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: 0.3s;
    border-radius: 6px;
}
.btn-cyan { background-color: var(--color-cyan); color: #FFF; }
.btn-cyan:hover { background-color: var(--color-cyan-hover); box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3); }
.btn-outline-dark { background: transparent; border: 1px solid var(--color-heading); color: var(--color-heading); }
.btn-outline-dark:hover { background: var(--color-heading); color: #fff; }
.full-width { width: 100%; }

/* --- Reviews --- */
.reviews-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 30px; }
.review-card {
    background: #FFF;
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    position: relative;
}
.quote-mark { font-size: 4rem; color: var(--color-cyan); opacity: 0.2; position: absolute; top: 10px; left: 20px; font-family: serif; }
blockquote { font-style: italic; color: #475569; margin-bottom: 20px; font-size: 1rem; position: relative; z-index: 1; }
cite { font-weight: 600; font-size: 0.9rem; display: block; color: var(--color-heading); }

/* --- Footer --- */
.page-footer {
    padding: 50px;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: #94A3B8;
    font-size: 0.9rem;
    margin-top: auto;
    background: #FFF;
}

.cyan-line { border: 0; height: 3px; background: var(--color-cyan); margin: 20px 0; width: 60px; }

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

/* --- Responsive --- */
@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: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 1001;
        background: var(--color-sidebar);
        border: 1px solid #334155;
        width: 45px;
        height: 45px;
        border-radius: 6px;
        cursor: pointer;
    }
    .bar {
        display: block;
        width: 25px;
        height: 2px;
        background: #fff;
    }

    .hero-header h1 { font-size: 3rem; }
    .content-container { padding: 60px 25px; }
    .grid-section, .split-layout, .contact-layout { display: block; }
    .split-layout img, .split-layout .split-content { width: 100%; }
    .split-layout img { margin-bottom: 20px; }
    .contact-info { margin-bottom: 30px; }
    .stats-grid { grid-template-columns: 1fr; }
}