/* 
   ================================================================
   İŞLEV YMM - ULTRA-MODERN DESIGN SYSTEM (V2.0 - PREMIUM)
   ================================================================
*/

:root {
    /* Derin ve Kurumsal Renkler */
    --primary: #0a192f;       /* Derin Lacivert (Premium hissi için) */
    --secondary: #00d2ff;     /* Canlı Turkuaz/Mavi (Modern dokunuş) */
    --accent: #e6f7ff;        /* Çok hafif mavi arka plan */
    
    /* Metin Renkleri */
    --text-dark: #1a1a1a;     /* Ana başlıklar için */
    --text-body: #4a5568;     /* Okunabilir gövde metni */
    --text-muted: #718096;    /* İkincil bilgiler */
    --text-light: #ffffff;

    /* Modern Gölgeler (Soft Shadows) */
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-md: 0 15px 35px rgba(10, 25, 47, 0.1);
    --shadow-lg: 0 25px 50px rgba(10, 25, 47, 0.15);

    /* Köşe Yumuşatması */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Geçişler */
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* 1. TEMEL RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: #ffffff;
    color: var(--text-body);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* 2. LAYOUT (YERLEŞİM) */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding { padding: 100px 0; }
.bg-light { background-color: var(--accent); }

/* 3. TIPOGRAFİ (Hiyerarşi) */
h1, h2, h3, h4 {
    color: var(--primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 3.5rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }

p { margin-bottom: 1.2rem; }

/* 4. NAVİGASYON (Header) */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px); /* Cam efekti (Glassmorphism) */
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

nav ul li a:hover {
    color: var(--secondary);
}

/* 5. BUTONLAR (Premium Etkileşim) */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 14px rgba(10, 25, 47, 0.3);
}

.btn-primary:hover {
    background: var(--secondary);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.4);
}

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* 6. KARTLAR (Service & News Cards) */
.card {
    background: white;
    border-radius: var(--radius-md);
    padding: 35px;
    border: 1px solid rgba(0,0,0,0.03);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

/* 7. HERO ALANI (Giriş Bölümü) */
.hero {
    padding: 120px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

/* 8. RESPONSIVE (Mobil Uyumluluk) */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    .container { width: 92%; }
    nav { display: none; } /* Mobil menü için ileride geliştirilecek */
}