/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --bg-color: #0f0f16;
    --second-bg-color: #1a1a2e;
    --text-color: #ededed;
    --main-color: #00adb5;
    --hover-color: #393e46;
    --card-bg: rgba(255, 255, 255, 0.05);
    --font-family: 'Poppins', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
    border: none;
    outline: none;
    scroll-behavior: smooth;
    font-family: var(--font-family);
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
}

/* Navigasyon Barı */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 9%;
    background: rgba(15, 15, 22, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
    cursor: pointer;
}

.logo span {
    color: var(--main-color);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-size: 1.1rem;
    color: var(--text-color);
    font-weight: 500;
    transition: .3s;
}

.nav-links a:hover {
    color: var(--main-color);
}

.btn-contact {
    padding: 0.5rem 1.5rem;
    background: var(--main-color);
    border-radius: 2rem;
    color: var(--bg-color) !important;
    font-weight: 600 !important;
    transition: 0.3s ease;
}

.btn-contact:hover {
    box-shadow: 0 0 10px var(--main-color);
}

.hamburger {
    font-size: 2rem;
    color: var(--text-color);
    display: none;
    cursor: pointer;
}

/* Hero Section */
section {
    min-height: 100vh;
    padding: 10rem 9% 2rem;
}

.hero {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5rem;
}

.hero-content h3 { font-size: 2rem; font-weight: 700; }
.hero-content h1 { font-size: 4rem; font-weight: 700; line-height: 1.3; }
.hero-content h2 { font-size: 2rem; font-weight: 700; margin-bottom: 1rem; }
.hero-content h2 span { color: var(--main-color); }
.hero-content p { font-size: 1rem; margin-bottom: 2rem; max-width: 600px; line-height: 1.6; }

.social-icons a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 3rem;
    height: 3rem;
    background: transparent;
    border: 2px solid var(--main-color);
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--main-color);
    margin: 0 1rem 2rem 0;
    transition: .5s ease;
}

.social-icons a:hover {
    background: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 15px var(--main-color);
}

.btn {
    display: inline-block;
    padding: 0.8rem 2.5rem;
    background: var(--main-color);
    border-radius: 2rem;
    box-shadow: 0 0 10px var(--main-color);
    font-size: 1.2rem;
    color: var(--bg-color);
    font-weight: 600;
    transition: .5s ease;
}

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

.hero-img img {
    width: 25vw;
    animation: floatImage 4s ease-in-out infinite;
    border-radius: 50%;
    border: 5px solid var(--main-color);
    box-shadow: 0 0 30px var(--main-color);
}

@keyframes floatImage {
    0% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0); }
}

.heading {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 3rem;
}

/* Hakkımda */
.about {
    background: var(--second-bg-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.about-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid rgba(255,255,255,0.1);
    max-width: 800px;
    text-align: center;
}

.stats {
    display: flex;
    justify-content: space-around;
    margin-top: 2rem;
}

.stat-item h4 { font-size: 2rem; color: var(--main-color); }

/* Yetenekler */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.1);
    transition: 0.4s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    cursor: pointer;
}

.skill-card:hover {
    transform: translateY(-10px);
    border-color: var(--main-color);
    box-shadow: 0 0 15px rgba(0, 173, 181, 0.3);
    background: rgba(255, 255, 255, 0.1);
}

.skill-card i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.1rem;
    font-weight: 500;
}

/* Projeler */
.projects {
    background: var(--second-bg-color);
}

.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid rgba(255,255,255,0.1);
    overflow: hidden;
    transition: 0.4s ease;
    padding: 25px;
    display: flex;
    flex-direction: column; 
    height: 100%;
}

.project-card:hover {
    transform: scale(1.02);
    border-color: var(--main-color);
}

.project-content-wrapper {
    margin-bottom: 20px;
}

.project-content-wrapper h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.project-footer {
    margin-top: auto; 
    display: flex;
    flex-direction: column;
    gap: 15px;
}

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

.tags span {
    background: rgba(0, 173, 181, 0.2);
    color: var(--main-color);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
}

.links a {
    color: var(--text-color);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
    transition: 0.3s;
}

.links a:hover {
    color: var(--main-color);
}

/* Footer */
footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    padding: 2rem 9%;
    background: var(--bg-color);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-social a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 2.5rem;
    height: 2.5rem;
    background: transparent;
    border: 2px solid var(--text-color);
    border-radius: 50%;
    color: var(--text-color);
    margin-left: 1rem;
    transition: 0.3s;
}

.footer-social a:hover {
    background: var(--main-color);
    border-color: var(--main-color);
}

/* Animasyonlar */
.hidden-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 1s;
}

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

/* 404 Sayfası Stilleri (YENİ EKLENDİ) */
.error-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    padding: 0 9%;
}

.error-card {
    text-align: center;
    background: var(--card-bg);
    padding: 4rem;
    border-radius: 2rem;
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
    max-width: 600px;
}

.error-card h1 {
    font-size: 8rem;
    color: var(--main-color);
    font-weight: 700;
    text-shadow: 0 0 20px var(--main-color);
    margin-bottom: 1rem;
    line-height: 1;
}

.error-card h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.error-card p {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    color: #ccc;
}

/* Responsive */
@media (max-width: 991px) {
    .navbar { padding: 1.5rem 4%; }
    section { padding: 10rem 4% 2rem; }
    .error-section { padding: 0 4%; }
}

@media (max-width: 768px) {
    .hamburger { display: block; }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 1rem 4%;
        background: var(--bg-color);
        border-top: 1px solid rgba(255,255,255,0.1);
        display: none;
        flex-direction: column;
        gap: 1.5rem;
    }

    .nav-links.active { display: flex; }
    
    .hero { flex-direction: column-reverse; }
    .hero-img img { width: 60vw; }
    .hero-content h1 { font-size: 3rem; }
    
    .error-card { padding: 2rem; }
    .error-card h1 { font-size: 5rem; }
}