/* Genel Ayarlar ve Reset */
:root {
    --primary-bg: #0A0A0A; /* Koyu Siyah */
    --secondary-bg: #1A1A1A; /* Hafif Daha Açık Siyah */
    --accent-color: #00FFC2; /* Neon Yeşil/Camgöbeği */
    --accent-color-light: #00E0A8; /* Vurgu renginin biraz açığı */
    --text-color-light: #E0E0E0; /* Yumuşak Beyaz */
    --text-color-secondary: #CCCCCC; /* Açık Gri */
    --card-bg: #1E1E1E; /* Kartlar için koyu arka plan */
    --border-color: #333333; /* Kenarlıklar için gri */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth; /* Yumuşak kaydırma */
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    background-color: var(--primary-bg);
    color: var(--text-color-light);
    overflow-x: hidden; /* Yatay kaydırmayı engelle */
    -webkit-font-smoothing: antialiased; /* Fontları daha pürüzsüz yapar */
    text-rendering: optimizeLegibility; /* Metin okunabilirliğini artırır */
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-color-light);
    margin-bottom: 0.5em;
    line-height: 1.2;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: white;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 15px;
    color: var(--text-color-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 5px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    border-radius: 3px;
}

/* Header ve Navigasyon */
.main-header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8); /* Yarı şeffaf arka plan */
    backdrop-filter: blur(10px); /* Bulanıklaştırma efekti */
    -webkit-backdrop-filter: blur(10px);
    padding: 1rem 0;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.5);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}
.nav-logo:hover {
    color: var(--text-color-light);
}

.nav-links {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin-left: 2.5rem;
}

.nav-links a {
    font-size: 1.1rem;
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
    color: var(--text-color-light);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease-in-out;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Butonlar */
.btn {
    display: inline-flex; /* Iconlarla hizalama için flex */
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    border-radius: 50px; /* Daha yuvarlak butonlar */
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    gap: 8px; /* Icon ile metin arasına boşluk */
}

.btn-primary {
    background: linear-gradient(45deg, var(--accent-color), var(--accent-color-light));
    color: var(--primary-bg);
}

.btn-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 255, 194, 0.5);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

.btn-secondary:hover {
    background-color: var(--accent-color);
    color: var(--primary-bg);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 255, 194, 0.3);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: 80px 20px 20px; /* Navbar için boşluk */
}

.hero-content {
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: 5.5rem; /* Daha büyük font */
    font-weight: 900; /* Daha kalın */
    margin-bottom: 0.2em;
    letter-spacing: -2px;
    background: linear-gradient(45deg, var(--accent-color), #4CAF50); /* Gradient metin */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 15px rgba(0, 255, 194, 0.4); /* Hafif parlama */
}

.hero-subtitle {
    font-size: 2.2rem;
    font-weight: 300;
    margin-bottom: 3rem;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.5px;
}

.hero-ctas {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap; /* Küçük ekranlarda alt alta gelmesi için */
}

.hero-background-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Partikül veya Soyut animasyon JS ile buraya eklenecek */
    background-image: radial-gradient(circle at center, rgba(0,255,194,0.03) 0%, transparent 70%),
                      url('data:image/svg+xml;utf8,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="%23222" opacity="0.5"/></svg>');
    background-size: cover, 10px 10px;
    opacity: 0.1;
    z-index: 1;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    color: var(--text-color-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.9rem;
    animation: bounce 2s infinite;
    z-index: 2;
}

.scroll-indicator i {
    font-size: 1.5rem;
    margin-top: 5px;
}

/* Hakkımda Bölümü */
.about-section {
    padding: 100px 0; /* Daha fazla padding */
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr; /* Görsel için biraz daha geniş alan */
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 1.15rem;
    margin-bottom: 1.8rem;
    color: var(--text-color-secondary);
    line-height: 1.8;
}

.about-image img {
    width: 100%;
    height: auto;
    max-width: 450px; /* Max genişlik sınırlaması */
    display: block;
    margin: 0 auto;
    border-radius: 20px; /* Daha yuvarlak */
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
    border: 3px solid var(--accent-color);
    animation: floatImage 4s ease-in-out infinite; /* Daha uzun animasyon */
    object-fit: cover;
}

/* Mikro Etkileşim: Kelime vurgulama */
.highlight-word {
    color: var(--accent-color);
    font-weight: 600;
    cursor: help;
    border-bottom: 1px dashed var(--accent-color);
    position: relative;
}

.word-tooltip {
    position: absolute;
    background-color: var(--accent-color);
    color: var(--primary-bg);
    padding: 10px 15px;
    border-radius: 10px;
    font-size: 0.9rem;
    white-space: nowrap;
    z-index: 1001;
    box-shadow: 0 6px 20px rgba(0, 255, 194, 0.4);
    pointer-events: none; /* Tooltip'in fare olaylarını engellemesini önle */
    opacity: 0; /* Başlangıçta gizli */
    transform: translateY(10px); /* Animasyon başlangıç pozisyonu */
}

/* Yetenekler Bölümü */
.skills-section {
    padding: 100px 0;
    background-color: var(--primary-bg);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.skill-card {
    background-color: var(--card-bg);
    border-radius: 20px;
    padding: 35px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s ease;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease-out;
}

.skill-card:hover::before {
    transform: translateX(0);
}

.skill-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 18px 35px rgba(0, 255, 194, 0.4);
}

.skill-icon {
    font-size: 4rem; /* Daha büyük ikonlar */
    color: var(--accent-color);
    margin-bottom: 20px;
    animation: pulse 2s infinite ease-in-out; /* Hafif nabız animasyonu */
}
.skill-card:hover .skill-icon {
    animation: none; /* Hover'da durdur */
}

.skill-card h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.skill-description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.75);
    margin-top: 10px;
}

.skill-progress-bar {
    width: 100%;
    height: 10px; /* Daha kalın bar */
    background-color: #333;
    border-radius: 5px;
    margin-top: 20px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #4CAF50);
    border-radius: 5px;
    width: 0; /* JS ile animasyonlu dolacak */
    transition: width 1.5s ease-out;
    position: absolute; /* Gradyan efekti için */
    left: 0;
    top: 0;
}

/* Projeler Bölümü */
.projects-section {
    padding: 100px 0;
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
}

.project-filters {
    text-align: center;
    margin-bottom: 60px;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-btn {
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 12px 30px;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.05rem;
    font-weight: 500;
    text-transform: uppercase;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--accent-color);
    color: var(--primary-bg);
    box-shadow: 0 8px 20px rgba(0, 255, 194, 0.4);
    transform: translateY(-3px);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); /* Daha geniş kartlar */
    gap: 50px;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.4s ease;
    position: relative;
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-15px) scale(1.02); /* Daha belirgin hover */
    box-shadow: 0 20px 50px rgba(0, 255, 194, 0.5);
}

.project-thumbnail {
    width: 100%;
    height: 250px; /* Daha büyük görsel alanı */
    object-fit: cover;
    display: block;
    border-bottom: 1px solid var(--border-color);
    filter: brightness(0.6) grayscale(0.4); /* Başlangıçta daha sönük ve koyu */
    transition: filter 0.3s ease;
}
.project-card:hover .project-thumbnail {
    filter: brightness(1) grayscale(0); /* Hover'da tam canlılık */
}

.project-info {
    padding: 30px;
}

.project-info h3 {
    font-size: 2rem;
    margin-bottom: 12px;
    color: var(--accent-color);
}

.project-description {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 20px;
    line-height: 1.7;
}

.project-techs span {
    display: inline-block;
    background-color: #333;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    padding: 6px 12px;
    border-radius: 8px;
    margin-right: 10px;
    margin-bottom: 10px;
    transition: background-color 0.3s ease;
}
.project-techs span:hover {
    background-color: var(--accent-color);
    color: var(--primary-bg);
}

.project-links {
    margin-top: 25px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-link {
    color: var(--text-color-light);
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    font-weight: 500;
}

.btn-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.btn-link:hover::after {
    width: 100%;
}

/* İletişim Bölümü */
.contact-section {
    padding: 100px 0;
    background-color: var(--primary-bg);
    text-align: center;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto 60px;
}

.contact-content p {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    line-height: 1.7;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 60px; /* Daha fazla boşluk */
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    flex-direction: column; /* Dikey hizalama */
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    color: var(--text-color-light);
    transition: transform 0.3s ease;
}
.info-item:hover {
    transform: translateY(-5px);
}

.info-item i {
    font-size: 3rem; /* Daha büyük ikonlar */
    color: var(--accent-color);
    margin-bottom: 5px;
}
.info-item a {
    color: var(--text-color-light);
}
.info-item a:hover {
    color: var(--accent-color);
}


.social-links {
    display: flex;
    justify-content: center;
    gap: 30px; /* Daha fazla boşluk */
    margin-bottom: 60px;
}

.social-icon {
    font-size: 3rem; /* Daha büyük ikonlar */
    color: var(--text-color-light);
    transition: color 0.3s ease, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.social-icon:hover {
    color: var(--accent-color);
    transform: translateY(-8px) scale(1.15); /* Daha belirgin animasyon */
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background-color: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.contact-form input,
.contact-form textarea {
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background-color: #252525;
    color: var(--text-color-light);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 255, 194, 0.3);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    align-self: flex-end; /* Sağ alta hizalama */
    background: linear-gradient(45deg, var(--accent-color), #4CAF50);
    color: var(--primary-bg);
    padding: 1rem 3rem;
    font-size: 1.1rem;
    font-weight: 700;
}
.btn-submit:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 255, 194, 0.5);
}

.map-illustration {
    margin-top: 50px;
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}
.istanbul-map {
    width: 100%;
    height: auto;
    fill: var(--card-bg); /* Haritanın içini doldurma */
    stroke: var(--border-color); /* Kenar çizgisi */
    stroke-width: 1;
}
.istanbul-map circle {
    animation: pulse 1.5s infinite alternate;
}
.istanbul-map text {
    fill: var(--accent-color);
    font-weight: bold;
    text-shadow: 0 0 5px rgba(0, 255, 194, 0.5);
}

/* Footer */
.main-footer {
    padding: 40px 0; /* Daha fazla padding */
    background-color: var(--secondary-bg);
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
}

/* Animasyonlar (Keyframes) */
@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes floatImage {
    0% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-8px) rotate(1deg); }
    50% { transform: translateY(-15px) rotate(-1deg); }
    75% { transform: translateY(-8px) rotate(1deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.05); opacity: 0.8; }
}

/* Mobil Duyarlılık */
@media (max-width: 992px) {
    .section-title {
        font-size: 3rem;
    }
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .about-image {
        order: -1; /* Görseli üste al */
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-wrap: wrap;
        justify-content: space-between;
        padding: 0 15px;
    }
    .nav-logo {
        font-size: 1.5rem;
    }
    .nav-links {
        display: none; /* Mobil menü JS ile açılacak */
        flex-direction: column;
        width: 100%;
        text-align: center;
        margin-top: 1rem;
        background: rgba(10, 10, 10, 0.95);
        padding: 10px 0;
        border-radius: 10px;
    }
    .nav-links.active {
        display: flex;
    }
    .nav-links li {
        margin: 10px 0;
    }
    .nav-links a {
        font-size: 1rem;
    }
    .hamburger-menu {
        display: block; /* Mobil menü butonu */
    }

    .hero-title {
        font-size: 3.5rem;
        letter-spacing: -1px;
    }
    .hero-subtitle {
        font-size: 1.5rem;
        margin-bottom: 2.5rem;
    }
    .hero-ctas {
        flex-direction: column;
        gap: 1rem;
    }
    .btn {
        padding: 0.8rem 2rem;
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 2.5rem;
        margin-bottom: 40px;
    }

    .skills-grid, .projects-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .skill-card {
        padding: 25px;
    }
    .skill-icon {
        font-size: 3rem;
    }
    .skill-card h3 {
        font-size: 1.5rem;
    }

    .project-thumbnail {
        height: 200px;
    }
    .project-info {
        padding: 20px;
    }
    .project-info h3 {
        font-size: 1.5rem;
    }
    .project-description {
        font-size: 0.95rem;
    }

    .contact-info {
        flex-direction: column;
        gap: 30px;
    }
    .info-item {
        font-size: 1.1rem;
    }
    .info-item i {
        font-size: 2.5rem;
    }
    .social-icon {
        font-size: 2.2rem;
    }
    .contact-form {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.8rem;
    }
    .hero-subtitle {
        font-size: 1.2rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .nav-links li {
        margin: 8px 0;
    }
}

/* Hamburger Menü (Mobil) */
.hamburger-menu {
    display: none; /* Varsayılan olarak gizli, mobil görünümde göster */
    cursor: pointer;
}

.hamburger-menu .bar {
    width: 28px;
    height: 3px;
    background-color: var(--accent-color);
    margin: 6px 0;
    transition: 0.4s;
    border-radius: 2px;
}

/* JavaScript ile açılınca animasyonlu geçiş */
.hamburger-menu.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-7px, 7px);
}

.hamburger-menu.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-7px, -7px);
}