/* ==========================================
   DESIGN SYSTEM & VARIABLES
   ========================================== */
:root {
    --bg-primary: #070405;
    --bg-secondary: #12090b;
    --bg-tertiary: #1f1013;
    
    --accent-cyan: #ff2d55;
    --accent-purple: #850625;
    --accent-gradient: linear-gradient(135deg, #850625 0%, #ff2d55 100%);
    
    --text-main: #f3f4f6;
    --text-muted: #a3a1a1;
    --border-color: rgba(255, 255, 255, 0.08);
    
    --font-headings: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --glow-cyan: 0 0 20px rgba(255, 45, 85, 0.3);
    --glow-purple: 0 0 20px rgba(133, 6, 37, 0.3);
    --shadow-card: 0 10px 30px -15px rgba(0, 0, 0, 0.7);
    
    --radius-lg: 16px;
    --radius-md: 8px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

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

button, input, textarea {
    font-family: inherit;
    border: none;
    outline: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-purple);
}

/* ==========================================
   PRELOADER
   ========================================== */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 45, 85, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-cyan);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

/* ==========================================
   NAVBAR (HEADER)
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    z-index: 1000;
    transition: var(--transition-smooth);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    height: 70px;
    background-color: rgba(8, 12, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-headings);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-headings);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link i {
    font-size: 14px;
    transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main);
}

.nav-link.active i, .nav-link:hover i {
    color: var(--accent-cyan);
    text-shadow: var(--glow-cyan);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    flex-direction: column;
    gap: 6px;
}

.hamburger .bar {
    width: 25px;
    height: 2px;
    background-color: var(--text-main);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

/* ==========================================
   BUTTONS & BADGES
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 28px;
    font-family: var(--font-headings);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(255, 45, 85, 0.5);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-purple);
    box-shadow: var(--glow-purple);
    transform: translateY(-3px);
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(255, 45, 85, 0.1);
    border: 1px solid rgba(255, 45, 85, 0.2);
    border-radius: 30px;
    color: var(--accent-cyan);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 20px;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    background: radial-gradient(circle at 10% 20%, rgba(133, 6, 37, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(255, 45, 85, 0.08) 0%, transparent 40%);
}

.hero-container {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 48px;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-family: var(--font-headings);
    font-size: 56px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-family: var(--font-headings);
    font-size: 24px;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 540px;
    margin-bottom: 36px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-icon {
    width: 44px;
    height: 44px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    color: var(--text-muted);
}

.social-icon:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
    transform: translateY(-5px);
}

.hero-image-area {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInScale 1s ease-out;
}

.image-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    padding: 8px;
    background: var(--accent-gradient);
    transition: var(--transition-smooth);
}

.image-wrapper:hover {
    transform: translateY(-8px) scale(1.03);
}

.glow-effect::after {
    content: '';
    position: absolute;
    top: -5px; left: -5px; right: -5px; bottom: -5px;
    background: var(--accent-gradient);
    border-radius: 50%;
    z-index: -1;
    filter: blur(25px);
    opacity: 0.5;
    transition: var(--transition-smooth);
}

.image-wrapper:hover::after {
    opacity: 0.8;
    filter: blur(35px);
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
    border-radius: 50%;
    border: 6px solid var(--bg-primary);
    transition: var(--transition-smooth);
}

.image-wrapper:hover .profile-img {
    transform: scale(1.05);
}

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 20px;
    color: var(--text-muted);
    animation: bounce 2s infinite;
}

/* ==========================================
   SECTIONS GENERAL
   ========================================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-headings);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.underline {
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    margin: 0 auto;
    border-radius: 2px;
    box-shadow: var(--glow-cyan);
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
}

.about-info h3, .about-skills h3 {
    font-family: var(--font-headings);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

.about-info p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

.personal-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.detail-item {
    font-size: 15px;
}

.detail-item strong {
    color: var(--accent-cyan);
    margin-right: 6px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.skill-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

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

.skill-icon {
    font-size: 36px;
    transition: var(--transition-smooth);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1);
}

/* Brand Colors */
.java-color { color: #f89820; }
.c-color { color: #00599c; }
.python-color { color: #3776ab; }
.linux-color { color: #00ffff; }
.git-color { color: #f1502f; }
.android-color { color: #3ddc84; }
.js-color { color: #f7df1e; }

/* ==========================================
   PROJECTS SECTION
   ========================================== */
.projects-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition-smooth);
    width: 100%;
    max-width: 380px;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-cyan);
    box-shadow: 0 15px 35px -10px rgba(255, 45, 85, 0.15), var(--shadow-card);
}

.project-img-wrapper {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 48px;
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-smooth);
}

.p1-bg { background: linear-gradient(135deg, #12090b 0%, #850625 100%); }
.p2-bg { background: linear-gradient(135deg, #12090b 0%, #ff2d55 100%); }
.p3-bg { background: linear-gradient(135deg, #12090b 0%, #a21b3c 100%); }

.project-card:hover .project-placeholder {
    transform: scale(1.1);
}

.project-links {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(8, 12, 20, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    opacity: 0;
    transition: var(--transition-smooth);
}

.project-img-wrapper:hover .project-links {
    opacity: 1;
}

.project-link-icon {
    width: 44px;
    height: 44px;
    background-color: var(--accent-cyan);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
}

.project-link-icon:hover {
    transform: scale(1.1);
    background-color: #fff;
    box-shadow: var(--glow-cyan);
}

.project-info {
    padding: 24px;
}

.project-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-block;
    margin-bottom: 10px;
}

.project-title {
    font-family: var(--font-headings);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.project-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

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

.project-tech span {
    font-size: 12px;
    font-weight: 500;
    background-color: var(--bg-tertiary);
    color: var(--text-main);
    padding: 4px 10px;
    border-radius: 4px;
}

/* ==========================================
   BLOG SECTION (DÜŞÜNCELER & YAZILAR)
   ========================================== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 45px;
}

.blog-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-card);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-cyan);
    box-shadow: 0 15px 30px -10px rgba(255, 45, 85, 0.15), var(--shadow-card);
}

.blog-date {
    font-size: 13px;
    color: var(--accent-cyan);
    margin-bottom: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.blog-card-title {
    font-family: var(--font-headings);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.4;
}

.blog-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
    flex-grow: 1;
}

.blog-link {
    font-family: var(--font-headings);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.blog-link:hover {
    color: var(--accent-cyan);
    text-shadow: var(--glow-cyan);
}

.blog-footer {
    display: flex;
    justify-content: center;
}

/* Responsive adjustment for blog section */
@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
}

.contact-info h3 {
    font-family: var(--font-headings);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon-box {
    width: 50px;
    height: 50px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    color: var(--accent-cyan);
}

.contact-item h4 {
    font-family: var(--font-headings);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
}

.contact-item p {
    margin-bottom: 0;
    font-weight: 600;
}

.contact-form {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-muted);
}

.form-group input, .form-group textarea {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 15px;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(255, 45, 85, 0.15);
}

.btn-submit {
    width: 100%;
}

.form-status {
    margin-top: 16px;
    padding: 12px;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    font-size: 14px;
}

.form-status.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-status.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.hidden {
    display: none;
}

/* ==========================================
   FOOTER
   ========================================== */
footer {
    background-color: #05080e;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer p {
    font-size: 14px;
    color: var(--text-muted);
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.footer-socials a {
    color: var(--text-muted);
    font-size: 18px;
}

.footer-socials a:hover {
    color: var(--accent-cyan);
}

/* ==========================================
   ANIMATIONS & REVEAL EFFECT
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translate(-50%, 0);
    }
    40% {
        transform: translate(-50%, -10px);
    }
    60% {
        transform: translate(-50%, -5px);
    }
}

/* Scroll Reveal Classes (controlled by JS) */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ==========================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image-area {
        order: 1;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons, .social-links {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .navbar {
        height: 70px;
    }
    
    .logo {
        font-size: 20px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
        gap: 24px;
        transition: var(--transition-smooth);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .image-wrapper {
        width: 260px;
        height: 260px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .personal-details {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}