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

:root {
    --bg-color: #fafafa;
    --text-color: #333;
    --text-light: #666;
    --accent-color: #4a6fa5;
    --accent-hover: #3d5a87;
    --border-color: #e0e0e0;
    --white: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

/* Header ve Navigasyon */
header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover,
nav a.active {
    color: var(--accent-color);
}

/* Main Container */
main {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 4rem;
    text-align: center;
}

.profile-photo {
    display: flex;
    justify-content: center;
}

.profile-photo img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--accent-color);
}

.intro h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.intro .title {
    font-size: 1.2rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.intro .bio {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* Expertise Section */
.expertise {
    margin-bottom: 4rem;
}

.expertise h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.expertise-item {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.expertise-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.expertise-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* CTA Section */
.cta {
    text-align: center;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.cta p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.75rem 2rem;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: var(--accent-hover);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

/* Page Header */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--text-light);
}

/* Blog Posts List */
.posts-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.post-card {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.post-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.post-card h3 a {
    text-decoration: none;
    color: var(--text-color);
    transition: color 0.2s;
}

.post-card h3 a:hover {
    color: var(--accent-color);
}

.post-date {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.post-excerpt {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.read-more {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.read-more:hover {
    text-decoration: underline;
}

/* Contact Page */
.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.contact-info h2,
.contact-form h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.info-item {
    margin-bottom: 1.5rem;
}

.info-item strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.info-item p {
    color: var(--text-light);
    line-height: 1.6;
}

.contact-form {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    resize: vertical;
}

/* Post Page */
.post {
    max-width: 700px;
    margin: 0 auto;
}

.post-header {
    margin-bottom: 2rem;
    text-align: center;
}

.post-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.post-header .post-date {
    color: var(--text-light);
    font-size: 0.95rem;
}

.post-content {
    color: var(--text-color);
    line-height: 1.8;
    font-size: 1.05rem;
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
}

.post-content h3 {
    font-size: 1.3rem;
    margin: 1.5rem 0 0.75rem;
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (min-width: 768px) {
    .hero {
        grid-template-columns: 1fr 2fr;
        text-align: left;
    }

    .profile-photo {
        justify-content: flex-start;
    }

    .intro .bio {
        margin: 0;
    }

    .contact-content {
        grid-template-columns: 1fr 1fr;
    }
}