/* General & Body Styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background: #f0f2f5;
    color: #333;
    scroll-behavior: smooth;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #4682B4;
    z-index: -1;
    opacity: 0.1;
}

/* --- Header & Navigation (Simplified and Responsive) --- */
header {
    position: sticky;
    top: 0;
    background: #ffffff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: auto;
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    color: #36454F;
    text-decoration: none;
    transition: font-size 0.3s ease;
}

.resume-btn {
    background: #4682B4;
    color: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.2s ease, padding 0.3s ease;
}

.resume-btn:hover {
    background: #3a6894;
    transform: translateY(-2px);
}

/* --- Section Styling --- */
.section {
    padding: 80px 20px;
    max-width: 1000px;
    margin: auto;
    text-align: center;
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* --- Hero Section / Profile --- */
.profile-pic {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid #4682B4;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.social-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

.social-links i {
    font-size: 30px;
    color: #555;
    transition: transform .3s, color .3s;
}

.social-links i:hover {
    transform: translateY(-3px) scale(1.1);
    color: #4682B4;
}

/* --- Skills Section --- */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.2rem;
    margin-top: 40px;
}

.skill-card {
    padding: 12px 20px;
    background: #4682B4;
    color: white;
    border-radius: 8px;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .7s ease, transform .7s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.section.visible .skill-card {
    opacity: 1;
    transform: translateY(0);
}

.skill-card:hover {
    transform: scale(1.08);
}

/* --- Projects Section --- */
.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 40px;
}

.project-card {
    background: #fff;
    padding: 20px;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform .4s, box-shadow .4s;
    text-align: left;
}

.project-card h3 {
    color: #36454F;
    margin-bottom: 10px;
}

.project-card p {
    color: #666;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.project-card a {
    display: inline-block;
    margin-top: 15px;
    color: #4682B4;
    font-weight: bold;
    text-decoration: none;
    transition: color 0.3s;
}

.project-card a:hover {
    text-decoration: underline;
    color: #3a6894;
}

/* --- Contact Form --- */
form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 500px;
    margin: auto;
    padding: 20px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

input,
textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: #4682B4;
    box-shadow: 0 0 5px rgba(70, 130, 180, 0.5);
}

button {
    padding: 12px;
    border: none;
    background: #4682B4;
    color: #fff;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
}

button:hover {
    background: #3a6894;
    transform: translateY(-2px);
}

/* --- Footer --- */
footer {
    background-color: #36454F;
    color: white;
    text-align: center;
    padding: 25px 10px;
    font-size: 1rem;
    font-weight: 500;
    margin-top: 60px;
}

/* --- Mobile Responsive Rules --- */
@media (max-width: 768px) {
    .navbar {
        padding: 0.8rem 1rem;
    }
    .logo {
        font-size: 1.4rem;
    }
    .resume-btn {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    .section {
        padding: 60px 15px;
    }
    .projects, .certifications-grid, .hobbies-grid, .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    .edu-card {
        flex-direction: column;
        text-align: center;
    }
    .edu-text {
        text-align: center;
    }
    .about-split {
        flex-direction: column;
        gap: 2rem;
    }
    .about-text, .about-bullets {
        flex: 1 1 100%;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .logo {
        font-size: 1.2rem;
    }
    .resume-btn {
        padding: 5px 10px;
        font-size: 0.8rem;
    }
}

/* Certifications */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.8rem;
    margin-top: 40px;
}

.cert-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 12px;
    padding: 20px;
    text-align: left;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.cert-card img {
    width: 100%;
    max-height: 160px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 15px;
}

.cert-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: #4682B4;
}

.cert-card p {
    font-size: 1rem;
    color: #666;
}

/* Education */
.education-container {
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
    margin-top: 40px;
}

.edu-card {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;   /* ✅ Center karayla vertical layout */
    justify-content: center;  /* ✅ Center horizontally & vertically */
    align-items: center;      /* ✅ */
    background-color: #ffffff;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-align: center;       /* ✅ Center text */
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.edu-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.edu-card h3 {
    margin: 0;
    font-size: 1.3rem;
    color: #36454F;
}

.edu-card p {
    margin: 5px 0;
    color: #666;
    font-size: 1rem;
}

.edu-text {
    flex: unset;            /* ✅ Remove flex grow */
    text-align: center;     /* ✅ Center text */
    width: 100%;
}

/* Hobbies */
.hobbies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    margin-top: 40px;
    justify-items: center;
}

.hobby-card {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: 100%;
    max-width: 220px;
}

.hobby-card i {
    font-size: 42px;
    color: #4682B4;
    margin-bottom: 15px;
}

.hobby-card h4 {
    font-size: 1.1rem;
    color: #36454F;
    margin: 0;
}

.hobby-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about-split {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    text-align: left;
    justify-content: center;
    align-items: flex-start;
}

.about-text {
    flex: 1 1 400px;
}

.about-text h2 {
    text-align: center;
    margin-bottom: 20px;
}

.about-text p {
    line-height: 1.6;
    color: #555;
}

.about-bullets {
    flex: 1 1 300px;
}

.about-bullets ul {
    list-style: none;
    padding: 0;
}

.about-bullets li {
    margin-bottom: 15px;
    font-size: 1.05rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    line-height: 1.4;
}

.about-bullets li i {
    color: #4682B4;
    font-size: 1.2rem;
    margin-top: 2px;
}

.highlight {
    color: #4682B4;
    font-weight: 600;
}

/* GitHub Contributions */
.contrib-graph {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 30px auto;
    display: block;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.contrib-list {
    list-style: none;
    padding: 0;
    max-width: 800px;
    margin: auto;
    text-align: left;
}

.contrib-list li {
    margin-bottom: 15px;
    font-size: 1.05rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.contrib-list i {
    color: #28a745;
    font-size: 1.2rem;
    margin-top: 2px;
}

/* Customer Reviews */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 40px;
}

.review-card {
    background-color: #ffffff;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.review-img {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 15px;
    border: 3px solid #4682B4;
}

.review-card h4 {
    margin: 0.5rem 0;
    font-size: 1.2rem;
    color: #36454F;
}

.review-card p {
    font-style: italic;
    color: #666;
    line-height: 1.5;
}

/* Achievements / Stats Section */
.stats-section {
    padding: 80px 20px;
    text-align: center;
}

.stats-section .section-title {
    font-size: 2.2rem;
    color: #36454F;
    margin-bottom: 40px;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    justify-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-box {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    width: 100%;
}

.stat-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.stat-box h3 {
    font-size: 42px;
    color: #4682B4;
    margin-bottom: 10px;
    font-weight: bold;
}

.stat-box p {
    font-size: 1.1rem;
    color: #555;
    margin: 0;
}