/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Color Palette - Professional Black/Dark */
    --bg-primary: #050505;
    --bg-secondary: #0f0f0f;
    --bg-card: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --accent-color: #3b82f6;
    /* Professional Blue */
    --accent-glow: rgba(59, 130, 246, 0.3);
    --border-color: #262626;
    --gradient-1: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);

    /* Spacing & Layout */
    --container-width: 1400px;
    --header-height: 80px;
    --section-padding: 100px 0;

    /* Effects */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --glow: 0 0 20px var(--accent-glow);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.container {
    /*üstten boşluk*/

    max-width: var(--container-width);
    margin: 0 auto;
    padding: 1rem 2rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glowPulse {
    0% {
        box-shadow: 0 0 5px var(--accent-glow);
    }

    50% {
        box-shadow: 0 0 20px var(--accent-glow);
    }

    100% {
        box-shadow: 0 0 5px var(--accent-glow);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -1px;
}

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

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

/* Language Toggle Button */
#lang-toggle {
    margin-left: 1.5rem;
    padding: 0.5rem;
    border: none;
    background: transparent;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    /* Blend with nav */
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

#lang-toggle:hover {
    color: var(--accent-color);
    background: transparent;
    transform: translateY(-2px);
    /* Subtle lift */
}

/* Mobile Menu Toggle */
.menu-toggle {

    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* Hero Section */
.hero {
    height: 90h;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Horizontally center */
    position: relative;
    padding-top: var(--header-height);
    /* 80px yerine bu kullan */
    /* Increased offset to push text down */
}

.hero-content {
    max-width: 900px;
    /* Increased slightly */
    margin: 0 auto;
    margin-top: 100px;
    text-align: center;
    animation: fadeIn 1s ease forwards;
}

.hero-subtitle {
    display: inline-block;
    color: var(--accent-color);
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero-description {
    font-size: 1.2rem;
    max-width: 700px;
    margin-bottom: 2.5rem;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.5);
}

.btn-outline {
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.05);
}

/* Stats Row */
.stats {
    display: flex;
    gap: 4rem;
    /* More spacing */
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    justify-content: center;
    /* Center stats */
}

.stat-item h4 {
    font-size: 2rem;
    margin-bottom: 0px;
}

.stat-item p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Sections General */
section {
    padding: var(--section-padding);
}

.section-header {
    margin-bottom: 4rem;
}

.section-tag {
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4rem;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.skill-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
}

.skill-list li::before {
    content: "•";
    color: var(--accent-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: grid;
    grid-template-columns: 1fr;
    /* Default mobile */
}

.project-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-card);
    transform: translateY(-5px);
}

.project-content {
    padding: 2.5rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.project-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.project-list li {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.2rem;
}

.project-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Timeline / Education */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--border-color);
    top: 0;
    bottom: 0;
    left: 0;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    margin-bottom: 3rem;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    left: -8px;
    background-color: var(--bg-primary);
    border: 2px solid var(--accent-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-date {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

/* Contact / Footer */
.footer {
    background: var(--bg-secondary);
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.2rem;
}

.social-link:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .stats {
        flex-direction: column;
        gap: 1.5rem;
    }
}