/* ========================================
   Modern Portfolio CSS - Yusuf Çırak
   Clean, Minimal & Professional Design
======================================== */

/* CSS Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --accent: #22d3ee;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --success: #10b981;
    --error: #ef4444;
    --gradient: linear-gradient(135deg, var(--primary), var(--accent));
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', monospace;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

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

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-darker);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s, visibility 0.5s;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 50px;
    height: 50px;
    border: 3px solid var(--bg-card);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========== PREVENT HORIZONTAL SCROLL - CRITICAL FIX ========== */
html {
    overflow-x: hidden !important;
    width: 100% !important;
    max-width: 100% !important;
    -webkit-overflow-scrolling: touch;
}

body {
    overflow-x: hidden !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 100% !important;
    position: relative !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* Wrapper for all content */
#page-wrapper,
main,
.main-content {
    overflow-x: hidden !important;
    width: 100% !important;
    max-width: 100vw !important;
}

section {
    overflow-x: hidden !important;
    max-width: 100vw !important;
    width: 100% !important;
    position: relative !important;
}

/* Disable AOS horizontal animations that cause overflow */
[data-aos="fade-left"],
[data-aos="fade-right"],
[data-aos="slide-left"],
[data-aos="slide-right"],
[data-aos="zoom-in-left"],
[data-aos="zoom-in-right"] {
    opacity: 0;
}

[data-aos="fade-left"].aos-animate,
[data-aos="fade-right"].aos-animate,
[data-aos="slide-left"].aos-animate,
[data-aos="slide-right"].aos-animate,
[data-aos="zoom-in-left"].aos-animate,
[data-aos="zoom-in-right"].aos-animate {
    opacity: 1;
    transform: translateX(0) !important;
}

/* Override AOS initial positions */
[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

/* Prevent any element from causing horizontal scroll */
img, video, iframe, canvas, svg {
    max-width: 100% !important;
    height: auto;
}

/* Fix touch scrolling */
* {
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    overflow-x: hidden;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    text-decoration: none;
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-card);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 70%),
                radial-gradient(ellipse at 80% 20%, rgba(34, 211, 238, 0.1) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 100px 24px;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero-badge .pulse {
    font-size: 8px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero h1 {
    font-size: clamp(32px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero h1 .highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    color: var(--text-secondary);
    margin-bottom: 20px;
    min-height: 36px;
}

.typed-text::after {
    content: '|';
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-description {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 32px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero Social */
.hero-social {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.hero-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 18px;
    transition: var(--transition);
}

.hero-social a:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

.scroll-text {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Section Styles */
section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 16px;
    font-weight: 500;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
}

/* About Section */
.about {
    background: var(--bg-darker);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
}

.image-wrapper img {
    width: 100%;
    display: block;
}

.image-border {
    position: absolute;
    inset: -10px;
    border: 2px solid var(--primary);
    border-radius: 24px;
    z-index: -1;
    opacity: 0.3;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.stat-item {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 16px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.about-text h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary-light);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.skills-container {
    margin: 32px 0;
}

.skills-container h4 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--text-muted);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    transition: var(--transition);
}

.skill-tag:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-light);
}

.education-badges {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 32px;
}

.edu-badge {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 16px;
    border-left: 4px solid var(--primary);
}

.edu-badge i {
    font-size: 24px;
    color: var(--primary);
}

.edu-badge strong {
    display: block;
    font-size: 16px;
    margin-bottom: 4px;
}

.edu-badge span {
    font-size: 13px;
    color: var(--text-muted);
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: 10px;
    width: 42px;
    height: 42px;
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-marker i {
    color: var(--primary);
    font-size: 16px;
}

.timeline-content {
    background: var(--bg-card);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--primary);
    transform: translateX(5px);
}

.timeline-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.timeline-date {
    font-size: 13px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.timeline-badge {
    padding: 4px 12px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: 4px;
}

.timeline-content h4 {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 12px;
}

.timeline-content h4 .location {
    color: var(--text-muted);
    margin-left: 8px;
}

.timeline-content h4 .location i {
    margin-right: 4px;
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 16px;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-tags span {
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-light);
    border-radius: 6px;
    font-size: 12px;
    font-family: var(--font-mono);
}

/* Services Section */
.services {
    background: var(--bg-darker);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.1);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.service-icon i {
    font-size: 24px;
    color: white;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.service-card > p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--text-muted);
    font-size: 14px;
    border-top: 1px solid var(--border-color);
}

.service-features li:first-child {
    border-top: none;
}

.service-features i {
    color: var(--success);
    font-size: 12px;
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

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

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

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-card);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 18px;
}

.contact-text span {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-text a,
.contact-text p {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    margin: 0;
}

.contact-text a:hover {
    color: var(--primary);
}

.contact-social {
    margin-top: 40px;
}

.contact-social h4 {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 18px;
    transition: var(--transition);
}

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

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-main);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

#submit-btn {
    position: relative;
}

#submit-btn .btn-loading {
    display: none;
}

#submit-btn.loading .btn-text {
    display: none;
}

#submit-btn.loading .btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.form-status {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-status.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Footer */
.footer {
    background: var(--bg-darker);
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    margin-bottom: 16px;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    gap: 24px;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

/* Responsive */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-darker);
        flex-direction: column;
        padding: 100px 40px;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        padding: 15px 20px;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        padding-left: 60px;
    }
    
    .timeline-marker {
        left: 0;
        width: 36px;
        height: 36px;
    }
    
    .contact-form-wrapper {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .hero-content {
        padding: 80px 16px;
    }
    
    .hero-social {
        flex-wrap: wrap;
    }
    
    .skill-tags {
        gap: 8px;
    }
    
    .skill-tag {
        padding: 6px 12px;
        font-size: 12px;
    }
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 4px;
    margin-right: 20px;
    background: var(--bg-card);
    padding: 4px;
    border-radius: 8px;
}

.lang-btn {
    padding: 6px 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--transition);
}

.lang-btn:hover {
    color: var(--text-primary);
}

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

/* Upwork Icon */
.upwork-icon,
.upwork-social {
    display: flex;
    align-items: center;
    justify-content: center;
}

.upwork-icon svg,
.upwork-social svg {
    fill: currentColor;
}

/* Portfolio Section */
.portfolio {
    background: var(--bg-dark);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.portfolio-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.5));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h4 {
    font-size: 18px;
    margin-bottom: 4px;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.portfolio-overlay p {
    font-size: 14px;
    color: var(--primary-light);
    transform: translateY(20px);
    transition: transform 0.3s ease 0.1s;
}

.portfolio-item:hover .portfolio-overlay h4,
.portfolio-item:hover .portfolio-overlay p {
    transform: translateY(0);
}

.portfolio-link {
    margin-top: 16px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s ease 0.2s;
}

.portfolio-item:hover .portfolio-link {
    transform: translateY(0);
    opacity: 1;
}

.portfolio-link:hover {
    background: white;
    color: var(--primary);
}

.portfolio-item.hidden {
    display: none;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Portfolio */
@media (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .lang-switcher {
        margin-right: 10px;
    }
}