/* ==========================================================================
   PRD TEST A.Ş. - SENIOR ENGINEERING DESIGN (HİZMETLER.CSS)
   Tipografi ve Whitespace (Boşluk) Odaklı Kurumsal Tasarım
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Kurumsal Mühendislik Paleti - Güçlü ve Ciddi */
    --brand-navy: #1e293b;       /* Slate 800 - Daha yumuşak koyu */
    --brand-blue: #3b82f6;       /* Blue 500 - Daha parlak ve iç açıcı */
    --brand-blue-dark: #2563eb;  /* Blue 600 - Vurgular için */
    --brand-blue-light: #eff6ff; /* Blue 50 - Çok açık zemin */
    --brand-gray: #f8fafc;       /* Slate 50 */
    --text-primary: #334155;     /* Slate 700 - Okunabilir başlıklar */
    --text-body: #64748b;        /* Slate 500 - Modern gövde metni */
    --border-line: #e2e8f0;      
    
    --transition-base: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-soft: 0 10px 40px -10px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 20px 40px -5px rgba(59, 130, 246, 0.15);
    --radius-card: 12px;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--text-body);
    line-height: 1.85;
    background-color: #FFFFFF;
    margin: 0; padding: 0;
    -webkit-font-smoothing: antialiased;
}

/* --- ORTAK MİMARİ SINIFLAR --- */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 4%;
}
.text-center { text-align: center; }
.mt-50 { margin-top: 50px; }
.mt-100 { margin-top: 160px; } /* Başlıklar arası mesafe artırıldı */

.section-h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--brand-navy);
    margin: 0 0 50px 0; /* Alt boşluk artırıldı */
    letter-spacing: -0.04em;
    line-height: 1.2;
    position: relative;
    display: block;
}

/* Başlık Altı Premium Çizgi */
.text-center .section-h2::after, .section-h2.text-center::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-blue), var(--brand-navy));
    margin: 20px auto 0;
    border-radius: 4px;
}
.section-h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--brand-navy);
    margin: 0 0 20px 0;
    letter-spacing: -0.02em;
}
.lead-text {
    font-size: 1.25rem;
    color: var(--text-body);
    max-width: 900px;
    margin: 0 auto 60px auto;
    font-weight: 400;
}

/* ==========================================================================
   1. HERO BÖLÜMÜ (Keskin ve Mühendisane)
   ========================================================================== */
.premium-hero {
    /* Daha canlı ve iç açıcı bir mavi gradyan */
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    color: #f8fafc;
    padding: 160px 0 120px 0; /* Alt kısma curve geleceği için padding arttı */
    position: relative;
    overflow: hidden;
    border-bottom: none;
}

/* Arkaplan Modern Desen */
.premium-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
                      radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 40%);
    pointer-events: none;
}

/* Hero Altı Dalga (Curve) Efekti - Sayfayı yumuşatır */
.premium-hero::after {
    content: '';
    position: absolute;
    bottom: -1px; left: 0; width: 100%; height: 80px;
    background: #fff;
    clip-path: ellipse(60% 100% at 50% 100%);
    z-index: 2;
}

.hero-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 4%;
    display: flex;
    align-items: center;
    gap: 100px; /* Boşluğu arttır */
    position: relative;
    z-index: 1;
}

.hero-content { 
    flex: 1.1; 
    animation: fadeInUp 0.8s 0.2s ease forwards;
    opacity: 0;
    transform: translateY(30px);
}

/* Glassmorphism Badge Stili */
.breadcrumb { 
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem; 
    font-weight: 600; 
    margin-bottom: 30px; 
    letter-spacing: 0.05em; 
    background: rgba(255, 255, 255, 0.15);
    padding: 10px 20px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.breadcrumb a { color: #e2e8f0; text-decoration: none; transition: var(--transition-base); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .current { color: #fff; font-weight: 700; text-decoration: underline; text-decoration-color: rgba(255,255,255,0.5); }
.breadcrumb .divider { margin: 0 4px; color: rgba(255,255,255,0.2); }

.hero-title {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 800;
    line-height: 1.05;
    color: #fff;
    margin: 0 0 25px 0;
    letter-spacing: -1px;
    text-shadow: 0 10px 30px rgba(0,0,0,0.15);
    animation: fadeInUp 0.8s 0.4s ease forwards;
    opacity: 0;
    transform: translateY(30px);
}
.hero-lead { 
    font-size: 1.15rem; color: #e2e8f0; font-weight: 400; margin: 0; max-width: 600px; line-height: 1.6;
    animation: fadeInUp 0.8s 0.6s ease forwards;
    opacity: 0;
    transform: translateY(30px);
}
.hero-image { 
    flex: 1; /* Daha dengeli bir alan tanıyalım */
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInRight 1s 0.5s ease forwards;
    opacity: 0;
}

.hero-image img {
    width: 100%;
    max-width: 600px; /* Görselin aşırı büyüyüp piksellenmesini engeller */
    height: auto;
    object-fit: cover; /* Görseli ezmeden alanı doldurur */
    aspect-ratio: 4 / 3; /* (Opsiyonel) Eğer görsellerin sabit bir oranda kalmasını istersen */
    
    border-radius: var(--radius-card);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Netlik Ayarları */
    image-rendering: -webkit-optimize-contrast; 
    transform-style: preserve-3d;
    backface-visibility: hidden;
    
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1); /* Daha yumuşak "spring" efekti */
    position: relative;
    z-index: 1;
}

.hero-image img:hover {
    transform: translateY(-15px) scale(1.02); /* Hafif büyüme derinlik katar */
}

/* Görsel arkası dekoratif çerçeve (Glassmorphism) */
.hero-image::after {
    content: '';
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 90%; /* Ana resimden biraz daha küçük olması derinliği artırır */
    height: 90%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.05));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-card);
    z-index: 0;
    backdrop-filter: blur(10px);
    pointer-events: none; /* Hover'ı engellemesin */
}

@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInRight { to { opacity: 1; transform: translateX(0); } }

/* ==========================================================================
   2. ÜST BÖLÜM: GRID (İçerik + Sidebar)
   ========================================================================== */
.premium-body { 
    padding: 100px 0 140px 0; 
    background-color: #f8fafc; /* İçerik kartlarının öne çıkması için hafif gri zemin */
    position: relative;
    z-index: 2;
}

/* Arka plan dekoratif desen */
.premium-body::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    pointer-events: none;
}

.layout-top-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 120px;
    position: relative;
    z-index: 1;
}

/* İçindekiler Tablosu (SEO Sitelinks) */
.table-of-contents {
    background-color: #fff;
    padding: 30px;
    margin-bottom: 60px;
    border-radius: var(--radius-card);
    border: 1px solid rgba(255,255,255,0.5);
    box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.08);
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}
.table-of-contents:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -15px rgba(15, 23, 42, 0.12);
}
/* Sol kenar süsü */
.table-of-contents::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 8px; height: 100%;
    background: linear-gradient(to bottom, var(--brand-blue), var(--brand-blue-dark));
}

.table-of-contents h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: var(--brand-navy);
    border-bottom: none;
    display: inline-block;
    padding-bottom: 8px;
    margin-bottom: 30px;
    position: relative;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.table-of-contents h3::after {
    content: '';
    display: block;
    width: 40px; height: 3px;
    background: var(--brand-blue);
    margin-top: 8px;
    border-radius: 10px;
}

.table-of-contents ul {
    column-count: 2;
    column-gap: 60px;
    list-style-type: none;
    padding: 0;
    margin: 0;
}
.table-of-contents li { margin-bottom: 15px; }
.table-of-contents a { 
    color: var(--text-body); 
    text-decoration: none; 
    font-weight: 600; 
    font-size: 0.95rem;
    transition: var(--transition-base); 
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 5px 0;
}
.table-of-contents a::before {
    content: '\f0da';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 12px;
    color: var(--brand-blue);
    opacity: 0;
    transform: translateX(-5px);
    transition: var(--transition-base);
}
.table-of-contents a:hover { 
    color: var(--brand-blue-dark); 
    transform: translateX(5px);
}
.table-of-contents a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.article-intro p { font-size: 1.1rem; margin-bottom: 30px; line-height: 1.8; color: var(--text-primary); }
.article-intro strong { color: var(--brand-navy); font-weight: 700; }

.dropcap {
    float: left;
    font-size: 3.5rem;
    line-height: 0.8;
    padding-right: 15px;
    padding-top: 8px;
    font-weight: 900;
    color: var(--brand-blue);
    text-shadow: 2px 2px 0px rgba(59, 130, 246, 0.15);
}

.premium-quote {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.6;
    color: var(--brand-navy);
    padding: 40px;
    border-left: none;
    border-radius: var(--radius-card);
    margin: 80px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
    position: relative;
    box-shadow: 0 20px 50px -10px rgba(0,0,0,0.08);
    border: 1px solid rgba(255,255,255,0.5);
}
.premium-quote::before {
    content: '“';
    position: absolute;
    top: 20px; left: 20px;
    font-size: 4rem;
    color: rgba(37, 99, 235, 0.1);
    font-family: serif;
    line-height: 1;
    z-index: 0;
}
.premium-quote p {
    position: relative;
    z-index: 1;
}

/* Sidebar Mimari */
.sidebar-sticky { position: sticky; top: 120px; }

.contact-box {
    /* Koyu Lacivert Premium Kart */
    background: linear-gradient(145deg, #0f172a, #1e293b);
    padding: 40px 30px;
    color: #fff;
    margin-bottom: 40px;
    border-radius: var(--radius-card);
    box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.4);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
}
/* Dekoratif daire */
.contact-box::after {
    content: '';
    position: absolute;
    top: -40px; right: -40px;
    width: 120px; height: 120px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    transition: transform 0.5s ease;
}
.contact-box:hover::after {
    transform: scale(1.2);
}

.box-subtitle { display: block; font-size: 0.8rem; font-weight: 700; color: var(--brand-blue); letter-spacing: 0.15em; margin-bottom: 15px; text-transform: uppercase; }
.contact-box h4 { font-size: 1.4rem; margin: 0 0 15px 0; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
.contact-box p { font-size: 0.95rem; color: #94a3b8; margin-bottom: 30px; line-height: 1.6; }

.phone-link {
    display: block;
    font-size: 1.6rem;
    font-weight: 900;
    color: #fff;
    text-decoration: none;
    margin-bottom: 30px;
    letter-spacing: -1px;
    transition: var(--transition-base);
}
.phone-link:hover {
    color: var(--brand-blue);
    transform: translateX(5px);
}

/* İletişim İkonları ve Metinleri */
.contact-details {
    margin-top: 35px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 35px;
}
.contact-row {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    align-items: flex-start;
}
.contact-row svg { 
    min-width: 18px; width: 18px;
    stroke: var(--brand-blue); 
    transition: var(--transition-base);
}
.contact-row:hover svg {
    transform: scale(1.1);
}
.contact-row span, .contact-row a {
    font-size: 0.9rem;
    line-height: 1.5;
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition-base);
}
.contact-row a:hover { color: #fff; }

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    text-align: center;
    background: var(--brand-blue);
    color: #fff;
    font-weight: 700;
    padding: 16px 24px;
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition-base);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
    position: relative;
    overflow: hidden;
}
.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: btn-shine 4s infinite 1s;
}
@keyframes btn-shine {
    0% { left: -100%; }
    20% { left: 100%; }
    100% { left: 100%; }
}

.btn-primary:hover { background-color: #1d4ed8; transform: translateY(-3px); box-shadow: 0 15px 35px rgba(37, 99, 235, 0.5); }
.btn-whatsapp { background-color: #25D366; box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3); }
.btn-whatsapp:hover { background-color: #1ebc59; box-shadow: 0 10px 25px rgba(37, 211, 102, 0.4); }

.sidebar-title { font-size: 0.85rem; text-transform: uppercase; color: #64748B; margin-bottom: 25px; font-weight: 700; letter-spacing: 0.1em; }
.clean-list { list-style: none; padding: 0; margin: 0; border-top: none; }
.clean-list li { 
    border-bottom: none; 
    margin-bottom: 12px;
    background: #fff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: background-color 0.3s;
    overflow: hidden;
}
.clean-list li:hover {
    background-color: #f8fafc;
    padding-left: 0; /* Padding animasyonu yerine kart hareketi */
    border-color: var(--brand-blue);
    transform: translateX(5px);
}
.clean-list a { 
    color: var(--brand-navy); 
    text-decoration: none; 
    transition: var(--transition-base); 
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    font-size: 0.95rem; 
    font-weight: 600;
}
.clean-list a::after {
    content: '\f054';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 10px;
    color: #cbd5e1;
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition-base);
}
.clean-list li:hover a { 
    color: var(--brand-blue); 
}
.clean-list li:hover a::after {
    opacity: 1;
    color: var(--brand-blue);
    transform: translateX(0);
}

/* ==========================================================================
   3. ALT BÖLÜM: TAM GENİŞLİK (Merkezlenmiş Düzen)
   ========================================================================== */
.layout-full-width {
    padding-top: 160px;
    padding-bottom: 160px;
    border-top: 1px solid var(--border-line);
    /* Premium Tech-Grid Arka Plan */
    background-color: #f8fafc;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 80px 80px; /* Daha geniş ve ferah grid */
    position: relative;
    z-index: 1;
}

/* Üstte Premium Mavi Neon Çizgi */
.layout-full-width::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--brand-navy), var(--brand-blue), var(--brand-navy));
    box-shadow: 0 0 25px rgba(37, 99, 235, 0.6); /* Mavi Glow Efekti */
    z-index: 2;
}

.center-wrapper { max-width: 1100px; margin: 0 auto; position: relative; z-index: 2; }

/* Tipografik Hizmet Kartları (İkon Yok, Sayısal Vurgu Var) */
.typographic-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 60px; /* Kartlar arası boşluk artırıldı */
    margin-top: 120px;
}
.type-card {
    padding: 60px 50px;
    background-color: #fff;
    border-radius: 24px;
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: var(--transition-base);
    position: relative;
    box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.04);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Sol Kenar Vurgusu */
.type-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 4px; height: 100%;
    background: var(--brand-blue);
    transition: all 0.4s ease;
}

.type-card.full-span { 
    grid-column: 1 / -1; 
    background: linear-gradient(145deg, #1e293b 0%, #0f172a 100%); /* Koyu Kart */
    border: none;
    box-shadow: 0 30px 60px -15px rgba(15, 23, 42, 0.3);
}
.type-card.full-span::before { background: var(--brand-blue); box-shadow: 0 0 20px var(--brand-blue); }

.type-card:hover { 
    transform: translateY(-15px); 
    box-shadow: 0 40px 80px -20px rgba(37, 99, 235, 0.15);
}
.type-card:hover::before {
    width: 100%; /* Hoverda arka planı kapla */
    opacity: 0.05;
}

.card-number {
    font-size: 8rem;
    font-weight: 900;
    color: rgba(241, 245, 249, 0.8);
    position: absolute;
    top: -20px;
    right: 30px;
    line-height: 1;
    transition: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 0;
    font-family: 'Inter', sans-serif;
    letter-spacing: -6px;
}
.type-card:hover .card-number {
    color: var(--brand-blue);
    opacity: 0.1;
    transform: scale(1.1) translateX(-20px);
}
.type-card.full-span .card-number { color: rgba(255,255,255,0.05); }

.type-card h4 { 
    font-size: 1.8rem; 
    color: var(--brand-navy); 
    margin: 0 0 25px 0; 
    font-weight: 800; 
    position: relative;
    z-index: 1;
}
.type-card.full-span h4 { color: #fff; }

.type-card p { 
    margin: 0; 
    font-size: 1.15rem; 
    color: var(--text-body);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}
.type-card.full-span p { color: #cbd5e1; }

/* --- PROTOKOL BÖLÜMÜ (DARK MODE PREMIUM) --- */
.protocol-section {
    background-color: #0f172a; /* Dark Slate */
    padding: 160px 0; /* Üst boşluk artırıldı */
    position: relative;
    overflow: hidden;
    color: #fff;
}

/* Arka Plan Efekti */
.protocol-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.15), transparent 70%);
    pointer-events: none;
}

.protocol-header {
    max-width: 800px;
    margin: 0 auto 100px; /* Timeline ile başlık arası mesafe */
    position: relative;
    z-index: 2;
}

.protocol-badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--secondary-color);
    background: rgba(37, 99, 235, 0.1);
    padding: 10px 24px;
    border-radius: 50px;
    border: 1px solid rgba(37, 99, 235, 0.3);
    margin-bottom: 30px;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.2);
}

.protocol-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.protocol-desc {
    font-size: 1.2rem;
    color: #94a3b8;
    line-height: 1.7;
}

/* Timeline Yapısı */
.engineering-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    z-index: 2;
}

/* Dikey Çizgi */
.engineering-timeline::before {
    content: '';
    position: absolute;
    left: 40px; /* İkonun ortasına denk gelecek */
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--secondary-color), rgba(37, 99, 235, 0.1));
    z-index: 0;
}

.eng-step {
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
    position: relative;
    background: transparent; /* Kart yapısını kaldırıyoruz, akışa odaklanıyoruz */
    border: none;
    box-shadow: none;
    overflow: visible;
}

.eng-step:last-child { margin-bottom: 0; }

.eng-step:hover .eng-step-icon {
    background: var(--secondary-color);
    color: #fff;
    box-shadow: 0 0 30px rgba(37, 99, 235, 0.6);
    transform: scale(1.1);
    border-color: var(--secondary-color);
}

.eng-step-icon {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    background: #0f172a;
    border: 2px solid rgba(37, 99, 235, 0.5);
    border-radius: 50%;
    display: flex; 
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    position: relative;
    z-index: 1;
    transition: all 0.4s ease;
    box-shadow: 0 0 0 10px #0f172a; /* Çizgiyi kesmek için */
}

.eng-step-content {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 40px;
    flex: 1;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.eng-step:hover .eng-step-content {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.eng-title { 
    font-size: 1.5rem; 
    color: #fff;
    margin-bottom: 15px; 
    font-weight: 700;
}

.eng-step-content p {
    color: #cbd5e1;
    font-size: 1.05rem;
    line-height: 1.7;
    margin: 0;
}

@media (max-width: 768px) {
    .engineering-timeline::before { left: 20px; }
    .eng-step { gap: 20px; }
    .eng-step-icon { width: 40px; height: 40px; font-size: 1rem; box-shadow: 0 0 0 5px #0f172a; }
    .eng-step-content { padding: 25px; }
    .protocol-title { font-size: 2rem; }
}

/* Criteria Box (Safety Checklist) */
.criteria-box {
    background-color: #fff;
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 24px;
    padding: 50px;
    margin-top: 80px;
    box-shadow: 0 25px 60px -15px rgba(15, 23, 42, 0.08);
    position: relative;
    overflow: hidden;
}
/* Üst çizgi vurgusu (Kurumsal Mavi Gradyan) */
.criteria-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--brand-navy), var(--brand-blue));
}

.criteria-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}
.criteria-grid h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--brand-navy);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.criteria-grid h4 i { color: var(--brand-blue); font-size: 1.1em; }

.criteria-grid ul { 
    padding-left: 0; 
    list-style: none;
    margin: 0; 
}
.criteria-grid li {
    position: relative;
    padding: 16px 20px 16px 45px;
    margin-bottom: 12px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    color: var(--text-body);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}
.criteria-grid li:hover {
    background: #fff;
    transform: translateX(5px);
    box-shadow: 0 10px 20px -5px rgba(0,0,0,0.05);
    border-color: var(--brand-blue-light);
}
.criteria-grid li::before {
    content: '\f071'; /* Warning icon */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 18px; top: 18px;
    color: #ef4444;
    font-size: 0.9rem;
}

/* Legal Alert (Warning Zone - Şantiye Levhası Stili) */
.legal-alert {
    background: linear-gradient(135deg, #fff 0%, #fff1f2 100%);
    border: 1px solid #fee2e2;
    border-left: 5px solid #ef4444;
    border-radius: 20px;
    padding: 40px;
    margin-top: 80px;
    display: flex;
    gap: 30px;
    align-items: flex-start;
    box-shadow: 0 20px 40px -10px rgba(239, 68, 68, 0.1);
    position: relative;
}

.legal-alert::after { display: none; }

.legal-alert::before { display: none; } /* Eski ikonu kaldır */

/* Yeni İkon Kutusu */
.legal-alert-icon {
    width: 60px; height: 60px;
    background: #fee2e2;
    color: #ef4444;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.legal-alert-content { flex: 1; }

.legal-alert-title { font-size: 1.4rem; color: #991b1b; margin: 0 0 15px 0; font-weight: 800; }
.legal-alert p { margin: 0; color: #7f1d1d; font-size: 1.05rem; line-height: 1.7; margin-bottom: 15px; }
.legal-alert ul { padding-left: 20px; color: #7f1d1d; margin: 0; }
.legal-alert li { margin-bottom: 8px; }

/* ==========================================================================
   ULTRA PREMIUM SSS (FAQ) - ELITE ENGINEERING STYLE
   Lüks Mikro-Etkileşimler, Saf CSS İkonlar ve Derinlik Efektleri
   ========================================================================== */

.minimal-faq { 
    margin-top: 100px; 
    display: flex; 
    flex-direction: column; 
    gap: 24px; /* Kartlar arası ferah boşluk */
}

.faq-row { 
    background: #ffffff;
    border: 1px solid rgba(15, 23, 42, 0.06);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(10, 25, 47, 0.02);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

/* YENİ: Sol Tarafta Gizli Lüks İndikatör Çizgisi */
.faq-row::before {
    content: ''; 
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 0; 
    height: 100%;
    background: linear-gradient(180deg, var(--brand-blue), #38BDF8);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    z-index: 1;
}

/* Hover (Üzerine Gelme) Lüks Efekti */
.faq-row:hover { 
    border-color: rgba(29, 78, 216, 0.2);
    box-shadow: 0 20px 40px -10px rgba(29, 78, 216, 0.12); /* Mavi tonlu elit gölge */
    transform: translateY(-4px); /* Havaya kalkma */
}

/* Hover yapıldığında sol çizgi belirir */
.faq-row:hover::before { 
    width: 4px; 
    opacity: 1; 
}

/* Açık (Open) Durumu */
.faq-row[open] {
    border-color: rgba(29, 78, 216, 0.3);
    box-shadow: 0 25px 50px -12px rgba(10, 25, 47, 0.15);
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
}
.faq-row[open]::before { 
    width: 6px; 
    opacity: 1; 
}

/* Başlık (Soru) Kısmı */
.faq-row summary {
    padding: 35px 40px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--brand-navy);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.4s ease;
    position: relative;
    z-index: 2;
}

.faq-row summary::-webkit-details-marker { display: none; }

/* SAF CSS İKON ÇİZİMİ (Metin yerine kusursuz teknolojik ikon)
   Hem Artı (+) çizilir, hem de daire efekti verilir.
*/
.faq-row summary::after { 
    content: ''; 
    width: 48px; 
    height: 48px;
    flex-shrink: 0;
    background-color: #f1f5f9;
    border-radius: 50%;
    margin-left: 20px;
    position: relative;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55); /* Yaylanma efekti */
    
    /* İki çizgiyle Artı (+) yapımı */
    background-image: 
        linear-gradient(var(--brand-blue), var(--brand-blue)), 
        linear-gradient(var(--brand-blue), var(--brand-blue));
    background-size: 16px 2px, 2px 16px;
    background-position: center;
    background-repeat: no-repeat;
    box-shadow: inset 0 0 0 1px rgba(29, 78, 216, 0.08);
}

.faq-row:hover summary::after {
    background-color: #e0e7ff;
    box-shadow: inset 0 0 0 1px rgba(29, 78, 216, 0.2), 0 4px 12px rgba(29, 78, 216, 0.1);
}

/* Açık Durumda İkon Animasyonu (-) */
.faq-row[open] summary::after { 
    transform: rotate(180deg); 
    background-color: var(--brand-blue);
    
    /* Dikey çizgiyi sıfırlayarak sadece yatay (-) çizgiyi bırakma efekti */
    background-image: 
        linear-gradient(#ffffff, #ffffff), 
        linear-gradient(#ffffff, #ffffff);
    background-size: 16px 2px, 0px 0px; 
    box-shadow: 0 8px 20px rgba(29, 78, 216, 0.35);
}

.faq-row[open] summary {
    color: var(--brand-blue);
    padding-bottom: 20px; /* Cevapla aradaki mesafeyi yumuşatır */
}

/* Cevap (Açıklama) Kısmı */
.faq-ans { 
    padding: 0 40px 40px 40px; 
    color: var(--text-body); 
    font-size: 1.1rem;
    line-height: 1.85;
    position: relative;
    z-index: 2;
    animation: faqFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Cevabın üstüne çok şık, yarım bir ayrım çizgisi */
.faq-ans::before {
    content: ''; 
    display: block; 
    width: 50px; 
    height: 3px;
    background: linear-gradient(90deg, var(--brand-blue), transparent);
    margin-bottom: 25px;
    border-radius: 3px;
}

/* İçerik açıldığında yumuşak giriş animasyonu */
@keyframes faqFadeIn {
    from { opacity: 0; transform: translateY(-15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   MOBİL İNCE AYAR (RESPONSIVE)
   ========================================================================== */
@media (max-width: 768px) {
    .faq-row summary { padding: 25px; font-size: 1.05rem; }
    .faq-row summary::after { width: 40px; height: 40px; background-size: 14px 2px, 2px 14px; }
    .faq-row[open] summary::after { background-size: 14px 2px, 0px 0px; }
    .faq-ans { padding: 0 25px 30px 25px; font-size: 1rem; }
}

/* ==========================================================================
   4. MOBİL UYUM (RESPONSIVE)
   ========================================================================== */
@media (max-width: 1200px) {
    .layout-top-grid { gap: 60px; }
}
@media (max-width: 1024px) {
    .hero-container { flex-direction: column; text-align: left; }
    .hero-container { flex-direction: column; text-align: left; gap: 60px; }
    .hero-image { width: 100%; order: -1; } 
    .layout-top-grid { grid-template-columns: 1fr; }
    .layout-top-grid { grid-template-columns: 1fr; gap: 80px; }
    .sidebar-sticky { position: relative; top: 0; }
    .eng-step { flex-direction: column; }
    .eng-step-header, .eng-step-body { width: 100%; border-right: none; }
    .eng-step-header { border-bottom: 1px solid var(--border-line); }
    
    /* Timeline Tablet */
    .engineering-timeline::before { left: 30px; }
    .eng-step { gap: 30px; }
    .eng-step-icon { width: 60px; height: 60px; font-size: 1.2rem; box-shadow: 0 0 0 8px #0f172a; }
    
    .table-of-contents ul { column-count: 1; }
    .criteria-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .premium-hero { padding: 120px 0 60px 0; }
    .typographic-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.2rem; }
    .dropcap { font-size: 4rem; }
    .premium-quote { padding-left: 20px; font-size: 1.2rem; }
    .legal-alert, .criteria-box { padding: 30px; }
    .premium-hero { padding: 140px 0 80px 0; text-align: center; }
    .hero-container { text-align: center; gap: 40px; }
    .hero-content { text-align: center; }
    .hero-title { font-size: 2.2rem; margin-bottom: 20px; }
    .hero-lead { font-size: 1.05rem; margin-bottom: 30px; }
    .breadcrumb { justify-content: center; }
    
    .typographic-grid { grid-template-columns: 1fr; gap: 30px; margin-top: 80px; }
    .type-card { padding: 40px 30px; }
    .card-number { font-size: 5rem; top: 10px; right: 20px; opacity: 0.1; }
    
    .dropcap { font-size: 3.5rem; padding-right: 10px; }
    .premium-quote { padding: 30px; font-size: 1.1rem; margin: 50px 0; }
    .premium-quote::before { font-size: 3rem; top: 10px; left: 10px; }
    
    .legal-alert { flex-direction: column; padding: 30px; gap: 20px; text-align: center; }
    .legal-alert-icon { margin: 0 auto; }
    .legal-alert ul { text-align: left; }
    
    .criteria-box { padding: 30px 20px; }
    .criteria-grid { gap: 20px; }
    
    /* Timeline Mobile */
    .engineering-timeline::before { left: 20px; }
    .eng-step { flex-direction: column; gap: 15px; padding-left: 50px; }
    .eng-step-icon { 
        position: absolute; 
        left: 0; 
        top: 0; 
        width: 40px; 
        height: 40px; 
        font-size: 1rem; 
        box-shadow: 0 0 0 5px #0f172a; 
    }
    .eng-step-content { padding: 25px; }
    
    .protocol-title { font-size: 2rem; }
    .protocol-section { padding: 100px 0; }
    
    .faq-row summary { padding: 20px; font-size: 1rem; }
    .faq-row summary::after { width: 36px; height: 36px; margin-left: 15px; }
    .faq-ans { padding: 0 20px 25px 20px; font-size: 0.95rem; }
    
    .layout-full-width { padding: 100px 0; }
}