/* ==========================================================================
   CSS Variables (Tasarım Sistemi)
   ========================================================================== */
   :root {
    /* Renk Paleti (Dark Mode Odaklı) */
    --bg-main: #0a0a0c;
    --bg-secondary: #121216;
    --text-primary: #ffffff;
    --text-secondary: #a0a0ab;
    --accent-primary: #6366f1; /* Indigo */
    --accent-secondary: #a855f7; /* Purple */
    
    /* Glassmorphism (Cam Efekti) */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    
    /* Fontlar */
    --font-main: 'Outfit', sans-serif;
    
    /* Geçişler ve Boşluklar */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-padding: 0 5%;
}

/* ==========================================================================
   Reset & Temel Ayarlar
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    padding-left: 250px; /* Sidebar Genişliği */
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

.section {
    padding: 100px 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* ==========================================================================
   Arka Plan Efektleri (Gradients)
   ========================================================================== */
.bg-gradient-circle {
    position: fixed;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-secondary), transparent);
    top: -100px;
    left: -100px;
}

.circle-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-primary), transparent);
    bottom: 10%;
    right: -50px;
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* ==========================================================================
   Etkileşimli Arka Plan (Canvas Particle System)
   ========================================================================== */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
}

/* ==========================================================================
   Cam Efekti Kartları (Glassmorphism)
   ========================================================================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--glass-shadow);
}

/* ==========================================================================
   Butonlar
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-outline:hover {
    background: var(--glass-bg);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ==========================================================================
   Menü (Sidebar)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    z-index: 1000;
    transition: var(--transition);
    padding: 40px 30px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--glass-border);
}

.nav-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    height: 100%;
}

.logo-container {
    position: relative;
    margin-bottom: 60px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
    width: 100%;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(270deg, var(--accent-primary), var(--accent-secondary), #fff, var(--accent-primary));
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 5s ease infinite;
    display: block;
}

.logo-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 5px;
    font-weight: 300;
    letter-spacing: 1px;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
}

.nav-link {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
    display: inline-block;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
}

/* ==========================================================================
   Giriş Bölümü (Hero Section)
   ========================================================================== */
.hero {
    padding-top: 0;
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.glitch-text {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 10px;
    position: relative;
}

/* Basit bir Glitch efekti (Hover'da) */
.glitch-text:hover::before {
    content: attr(data-text);
    position: absolute;
    left: -2px;
    text-shadow: 2px 0 var(--accent-primary);
    top: 0;
    color: var(--text-primary);
    background: var(--bg-main);
    overflow: hidden;
    clip: rect(0, 900px, 0, 0); 
    animation: noise-anim 2s infinite linear alternate-reverse;
}

@keyframes noise-anim {
  0% { clip: rect(14px, 9999px, 86px, 0); }
  20% { clip: rect(74px, 9999px, 14px, 0); }
  40% { clip: rect(3px, 9999px, 87px, 0); }
  60% { clip: rect(42px, 9999px, 7px, 0); }
  80% { clip: rect(51px, 9999px, 49px, 0); }
  100% { clip: rect(98px, 9999px, 20px, 0); }
}

.subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--accent-primary);
    margin-bottom: 24px;
}

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

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* ==========================================================================
   Bölüm Başlıkları (Ortak)
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.section-header .line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
    margin: 0 auto;
    border-radius: 2px;
}

/* ==========================================================================
   Projelerim (Projects)
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.project-card {
    padding: 16px;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: rgba(99, 102, 241, 0.3);
}

.project-img-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 20px;
    aspect-ratio: 16/9;
}

.project-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-img-wrapper img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 12, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.btn-icon {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-main);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border: 1px solid var(--glass-border);
}

.btn-icon:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
}

.project-info h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-stack span {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    color: var(--accent-secondary);
}

/* ==========================================================================
   Eğitim & Akademik Geçmiş (Timeline)
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

/* Orta Çizgi */
.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 30px;
    padding: 24px 30px 24px 60px;
    margin-left: 10px;
}

.timeline-dot {
    position: absolute;
    left: -20px; /* Çizginin üzerine gelsin diye */
    top: 30px;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    border: 4px solid var(--bg-main);
    box-shadow: 0 0 0 2px var(--glass-border);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--accent-secondary);
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.timeline-content h4 {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   İletişim / Footer
   ========================================================================== */
.footer {
    padding-bottom: 40px;
    min-height: auto;
}

.footer-content {
    padding: 60px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
    text-align: left;
}

.footer-text h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.footer-text p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 400px;
}

.email-link {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-decoration: underline;
    text-decoration-color: transparent;
    transition: var(--transition);
}

.email-link:hover {
    text-decoration-color: var(--accent-primary);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-btn:hover {
    background: var(--accent-primary);
    transform: translateY(-5px);
}

.footer-bottom {
    margin-top: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ==========================================================================
   Scroll Animasyonları (Görünür Olunca Yavaşça Gelme)
   ========================================================================== */
.hidden {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.show {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Mobil Uyumluluk (Responsive Design)
   ========================================================================== */
@media (max-width: 992px) {
    body {
        padding-left: 0;
    }

    .navbar {
        transform: translateX(-100%);
    }

    .navbar.nav-active {
        transform: translateX(0);
    }

    .hamburger {
        display: block;
    }

    .hero-content {
        align-items: center;
        text-align: center;
    }
    
    .description {
        margin: 0 auto 40px auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .glitch-text {
        font-size: 3.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-text p {
        margin: 0 auto 24px auto;
    }
}

@media (max-width: 768px) {
    .glitch-text {
        font-size: 2.8rem;
    }

    .section {
        padding: 80px 0;
    }
}