:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --dark: #1f2937;
    --darker: #111827;
    --light: #f3f4f6;
    --lighter: #f9fafb;
    --gray: #9ca3af;
    --success: #10b981;
}

.dark-mode {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --dark: #f3f4f6;
    --darker: #1f2937;
    --light: #1f2937;
    --lighter: #111827;
    --gray: #6b7280;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--lighter);
    color: var(--dark);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background-color: var(--lighter);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}


.logo {
    
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);

}

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

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle, .lang-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--dark);
    transition: color 0.3s;
}

.theme-toggle:hover, .lang-toggle:hover {
    color: var(--primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 150px 0 100px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 0 0 20px 20px;
    margin-bottom: 50px;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.5rem;
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.btn {
    padding: 12px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background-color: white;
    color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    border: 2px solid white;
    color: white;
}

.btn-outline:hover {
    background-color: white;
    color: var(--primary);
    transform: translateY(-3px);
}

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary);
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary);
    border-radius: 2px;
}

/* About */
.about-content {
    display: flex;
    align-items: center;
    gap: 30px; 
}

.about-text {
    flex: 1.3;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.about-image {
    flex: 0.7;
    text-align: center;
}

.profile-img {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Skills */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.skill {
    background-color: var(--lighter);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.skill:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.skill i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.skill h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

/* Projects */
.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.project {
    background-color: var(--lighter);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.project-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.project-content {
    padding: 20px;
}

.project h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.project p {
    margin-bottom: 15px;
    color: var(--gray);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.tech-tag {
    background-color: var(--primary);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.project-links {
    display: flex;
    gap: 15px;
}

.project-links a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}

.project-links a:hover {
    text-decoration: underline;
}

/* Blog */
.blog-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.blog-post {
    background-color: var(--lighter);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.blog-post:hover {
    transform: translateY(-5px);
}

.blog-post h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.blog-post p {
    margin-bottom: 15px;
    color: var(--gray);
}

.read-more {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

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

/* Contact */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    padding: 12px 15px;
    border: 1px solid var(--gray);
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--lighter);
    color: var(--dark);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: var(--primary-dark);
}

/* Footer */
footer {
    background-color: var(--darker);
    color: white;
    padding: 40px 0 20px;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

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

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: color 0.3s;
}

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

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--primary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background-color: var(--primary);
    z-index: 1001;
    transition: width 0.3s;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--lighter);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid var(--gray);
    border-top: 5px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Particles */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.hero-buttons {
    position: relative;
    z-index: 100;
}

.about-text {
  padding: 25px 30px; /* iç boşluk */
  font-size: 1.05rem; /* okunabilir boyut */
  line-height: 1.7; /* satırlar arası boşluk */
  letter-spacing: 0.3px; /* harfler arası çok hafif boşluk */
  color: #d1d5db; /* koyu temada yumuşak gri */
  background: rgba(255,255,255,0.02); /* hafif arka plan */
  border-radius: 10px; /* köşeleri yumuşat */
}
.about-text h2 {
  margin-bottom: 15px;
  color: #3b82f6; /* başlık için mavi accent */
}

  .highlight {
    color: #2563eb;
    font-weight: 600;
    
  }

  @media (max-width: 768px) {
  .about-container {
    flex-direction: column;
  }

  
}