/* 1. RENK VE FONT TANIMLAMALARI (Variables) */
:root {
    /* Logondan aldığımız renkler */
    --terain-cyan: #00d2ff;      /* Logodaki açık canlı renk */
    --terain-navy: #0a192f;      /* Logodaki koyu taban renk */
    --terain-darker: #050a14;    /* Arka planın en derin hali */
    --text-main: #e6f1ff;        /* Yumuşak beyaz yazı */
    --text-dim: #8892b0;         /* Griye çalan yardımcı yazı */
    --transition: all 0.4s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* 2. GENEL SIFIRLAMA */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth; /* Sayfa içi geçişleri kaydırarak yapar */
}

body {
    background-color: var(--terain-darker);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 9. PRELOADER STİLLERİ */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--terain-darker);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000; /* Her şeyin en üstünde */
    transition: opacity 0.8s ease, visibility 0.8s;
}

.preloader-content {
    text-align: center;
}

.loader-logo {
    width: 150px;
    margin-bottom: 30px;
    animation: pulseLogo 2s infinite ease-in-out;
}

.loader-bar {
    width: 200px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    margin: 0 auto;
    position: relative;
    border-radius: 10px;
    overflow: hidden;
}

.progress {
    width: 0%;
    height: 100%;
    background: var(--terain-cyan);
    box-shadow: 0 0 15px var(--terain-cyan);
    animation: fillProgress 2.5s forwards ease-in-out;
}

.loader-text {
    margin-top: 15px;
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: var(--terain-cyan);
    opacity: 0.6;
}

/* Animasyonlar */
@keyframes pulseLogo {
    0%, 100% { transform: scale(1); filter: brightness(1); }
    50% { transform: scale(1.05); filter: brightness(1.3) drop-shadow(0 0 20px var(--terain-cyan)); }
}

@keyframes fillProgress {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* Sayfa yüklendiğinde JS ile eklenecek sınıf */
.preloader-hidden {
    opacity: 0;
    visibility: hidden;
}

/* 3. NAVIGASYON (Üst Menü) */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 0;
    background: rgba(5, 10, 20, 0.9);
    backdrop-filter: blur(10px); /* Cam efekti */
    z-index: 9999;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-logo {
    height: 80px; /* Logonu buraya göre ölçekledik */
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 1.3rem;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--terain-cyan);
}

.nav-cta a {
    background: transparent;
    border: 1px solid var(--terain-cyan);
    padding: 10px 20px;
    border-radius: 4px;
    color: var(--terain-cyan) !important;
}

.nav-cta a:hover {
    background: rgba(0, 210, 255, 0.1);
}

/* 4. HERO SECTION (Karşılama Ekranı) */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    background: radial-gradient(circle at center, rgba(0, 210, 255, 0.05) 0%, transparent 70%);
}

.modern-badge {
    background: rgba(0, 210, 255, 0.1);
    color: var(--terain-cyan);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(0, 210, 255, 0.2);
    cursor: auto;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem); /* Ekrana göre büyüyen yazı */
    font-weight: 800;
    margin: 20px 0;
    letter-spacing: -1px;
}

.gradient-text {
    background: linear-gradient(to right, var(--terain-cyan), #3a7bd5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;

    background-clip: text;
    color: transparent;
}

.hero p {
    color: var(--text-dim);
    max-width: 600px;
    font-size: 1.1rem;
    margin-bottom: 40px;
}

/* 5. BUTONLAR */
.hero-btns {
    display: flex;
    gap: 20px;
}

.btn-primary {
    text-decoration: none;
    background: var(--terain-cyan);
    color: var(--terain-navy);
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 700;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 210, 255, 0.3);
}

.btn-outline {
    text-decoration: none;
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-main);
}

/* Başlangıçta elemanlar hafif aşağıda ve şeffaf olacak */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94); /* Daha akıcı hız */
    visibility: hidden; /* Ekran okuyucular ve çakışmalar için */
}

/* JS 'visible' sınıfını eklediğinde eleman eski yerine ve görünür hale gelecek */
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
}

/* Animasyon Gecikmeleri (Sırayla gelmeleri için) */
.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* 6. HİZMETLER BÖLÜMÜ STİLLERİ */
.services-section {
    padding: 100px 0;
    background: var(--terain-darker);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-top: 15px;
    font-weight: 800;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-radius: 20px;
    transition: var(--transition);
    cursor: default;
}

.service-card:hover {
    background: rgba(0, 210, 255, 0.02);
    border-color: var(--terain-cyan);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 210, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--terain-cyan);
    margin-bottom: 25px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--terain-cyan);
    color: var(--terain-navy);
    transform: rotateY(180deg); /* Havalı bir ikon dönüşü */
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.service-card p {
    color: var(--text-dim);
    font-size: 1rem;
}

/* 7. BİZ KİMİZ BÖLÜMÜ STİLLERİ */
.about-section {
    padding: 120px 0;
    background: linear-gradient(to bottom, var(--terain-darker), #0a101d);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr; /* Sayfayı tam ortadan ikiye böler */
    gap: 80px;
    align-items: center;
}

.image-wrapper {
    position: relative;
    padding: 20px;
}

.about-img-main {
    width: 100%;
    max-width: 300px;
    filter: drop-shadow(0 0 30px rgba(0, 210, 255, 0.2));
}

.experience-badge {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 210, 255, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid var(--terain-cyan);
    padding: 20px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.experience-badge .number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--terain-cyan);
}

.experience-badge .text {
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.2;
}

.about-content h2 {
    font-size: 3rem;
    margin: 20px 0;
    line-height: 1.1;
}

.about-content p {
    color: var(--text-dim);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.02);
    padding: 20px;
    border-radius: 15px;
    border-left: 3px solid var(--terain-cyan);
}

.stat-item h4 {
    font-size: 1.5rem;
    color: var(--text-main);
}

.stat-item p {
    margin-bottom: 0;
    font-size: 0.9rem;
}

/* Mobil Uyumluluk (Responsive) */
@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr; /* Mobilde görsel ve metin alt alta gelir */
        text-align: center;
        gap: 40px;
    }
    .experience-badge {
        position: relative;
        bottom: 0;
        right: 0;
        margin-top: 20px;
        justify-content: center;
    }
}

/* 8. SÜREÇ BÖLÜMÜ STİLLERİ */
.process-section {
    padding: 100px 0;
    background: var(--terain-darker);
    position: relative;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.step-card {
    position: relative;
    padding: 30px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.step-card:hover {
    border-color: var(--terain-cyan);
    background: rgba(0, 210, 255, 0.03);
    transform: translateY(-5px);
}

.step-number {
    font-size: 3.5rem;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px rgba(0, 210, 255, 0.3); /* Numarayı sadece dış hat yapar */
    position: absolute;
    top: -20px;
    right: 20px;
    transition: var(--transition);
}

.step-card:hover .step-number {
    color: var(--terain-cyan);
    -webkit-text-stroke: 1px var(--terain-cyan);
    filter: drop-shadow(0 0 10px var(--terain-cyan));
}

.step-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--terain-cyan);
}

.step-content p {
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Mobilde numaraların yerini düzeltelim */
@media (max-width: 768px) {
    .step-number {
        font-size: 2.5rem;
        top: 10px;
    }
}

/* 10. SOSYAL BUTON TASARIMLARI */
.social-button-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 160px);
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap; /* Mobilde alt alta gelmesi için */
    margin-top: 50px;
    margin-bottom: 50px;
}

.social-card {
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 160px;
    height: 160px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    transition: var(--transition);
    color: white;
}

.social-card .social-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 15px;
    color: var(--terain-cyan);
    transition: var(--transition);
}

.social-card span {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 1px;
}

/* Hover Efektleri */
.social-card:hover {
    transform: translateY(-10px);
    background: rgba(0, 210, 255, 0.05);
    border-color: var(--terain-cyan);
    box-shadow: 0 15px 30px rgba(0, 210, 255, 0.1);
}

.social-card.instagram:hover { border-color: #E1306C; color: #E1306C; }
.social-card.github:hover { border-color: #f0f6fc; color: #f0f6fc; }
.social-card.bionluk:hover { border-color: #ff4130; color: #ff4130; }
.social-card.linkedin:hover { border-color: #0077b5; color: #0077b5; }
.social-card:hover .social-icon {
    transform: scale(1.1);
    color: inherit; /* Kartın rengini alır */
}

.footer {
    padding: 80px 0 30px;
    background: #03070d;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-logo {
    width: 200px;
    margin-bottom: 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-brand p { color: var(--text-dim); margin-top: 15px; }
.footer-links h4, .footer-social h4 { margin-bottom: 20px; color: var(--terain-cyan); }
.footer-links ul { list-style: none; }
.footer-links ul li { margin-bottom: 10px; }
.footer-links a { text-decoration: none; color: var(--text-dim); transition: 0.3s; }
.footer-links a:hover { color: white; }

.social-icons a {
    display: inline-block;
    margin-right: 15px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* --- RESPONSIVE TASARIM (MOBILE FIXES) --- */

@media (max-width: 768px) {
/* --- TERAIN SOFTWARE PREMIUM RESPONSIVE ENGINE --- */

/* 1. Global Taşma Koruması */
html, body {
    max-width: 100vw;
    overflow-x: hidden;
    position: relative;
    }
}

@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-content h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    /* Navigasyon & Konteynır */
    .container {
        width: 85%;
        justify-content: center; /* Mobilde logoyu ortalar */
    }

    .nav-menu {
        display: none; /* Temiz bir görünüm için */
    }

    .main-logo {
        height: 60px;
    }

    /* Hero Bölümü - Metin Dengesi */
    .hero {
        padding: 0 15px;
        height: auto;
        min-height: 100vh;
        padding-top: 120px;
        padding-bottom: 60px;
    }

    .hero h1 {
        font-size: 2.2rem !important;
        line-height: 1.2;
        margin-bottom: 20px;
        word-wrap: break-word;
    }

    .hero p {
        font-size: 0.95rem;
        line-height: 1.5;
        margin-bottom: 30px;
    }

    .hero-btns {
        flex-direction: column;
        width: 100%;
        max-width: 300px; /* Butonlar çok yayılmasın */
    }

    .btn-primary, .btn-outline {
        width: 100%;
        text-align: center;
        padding: 14px 0;
    }

    /* Hizmetler ve Süreç */
    .services-grid, .process-steps {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 10px;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    /* Hakkımızda Bölümü Görsel Ayarı */
    .about-img-main {
        max-width: 240px;
        margin: 0 auto;
        display: block;
    }

    .experience-badge {
        position: relative;
        right: auto;
        bottom: auto;
        margin: 20px auto 0;
        width: fit-content;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    /* Sosyal Butonlar (2x2 Düzeni Koruma) */
    .social-button-wrapper {
        grid-template-columns: repeat(2, 1fr); /* Tam yarı yarıya böl */
        width: 100%;
        max-width: 340px;
        margin: 40px auto;
        gap: 12px;
    }

    .social-card {
        width: 100%; /* Sabit px iptal */
        height: 130px;
        border-radius: 16px;
    }

    .social-card .social-icon {
        width: 35px;
        height: 35px;
        margin-bottom: 10px;
    }

    .social-card span {
        font-size: 0.85rem;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .footer-logo {
        margin: 0 auto 20px;
    }
}

/* Ekstra Küçük Ekranlar (iPhone SE vb.) */
@media (max-width: 380px) {
    .hero h1 {
        font-size: 1.8rem !important;
    }
    
    .social-button-wrapper {
        gap: 10px;
    }
}