:root {
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --accent-primary: #2ecc71; /* Green */
    --accent-secondary: #00eeff; /* Cyan */
    --accent-tertiary: #27ae60; /* Darker green */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
header {
    padding: 1.5rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background-color: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.menu {
    display: flex;
    gap: 2rem;
}

.menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

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

.menu a::after {
    content: '';
    position: absolute;
    width: 0%;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: all 0.3s ease;
}

.menu a:hover::after {
    width: 100%;
}

/* Sections */
section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 0;
}

/* Hero Section */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 80vh;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.typing-effect {
    font-family: monospace;
    color: var(--accent-secondary);
    font-weight: 400;
    font-size: 1.2rem;
    margin-bottom: 2rem;
    height: 1.2em;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    color: var(--text-primary);
    border: none;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-right: 1rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

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

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

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
    text-align: center;
}

/* Tab System */
.tabs-container {
    width: 100%;
    margin-top: 2rem;
}

.tabs {
    display: flex;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 2rem;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: all 0.3s ease;
}

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

.tab-btn.active {
    color: var(--text-primary);
}

.tab-btn.active::after {
    width: 100%;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Project Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

/* Project Cards */
.project-card {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.project-status {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    z-index: 5;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.project-status.finished {
    background-color: rgba(46, 204, 113, 0.2);
    color: #2ecc71;
    border: 1px solid rgba(46, 204, 113, 0.4);
}

.project-status.in-progress {
    background-color: rgba(255, 204, 0, 0.2);
    color: #ffcc00;
    border: 1px solid rgba(255, 204, 0, 0.4);
}

.project-status.planned {
    background-color: rgba(90, 200, 250, 0.2);
    color: #5ac8fa;
    border: 1px solid rgba(90, 200, 250, 0.4);
}

.project-media {
    position: relative;
    overflow: hidden;
}

.project-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: all 0.5s ease;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Expandable Content */
.more-btn {
    display: inline-block;
    color: var(--accent-primary);
    background: none;
    border: none;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

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

.more-btn .icon {
    display: inline-block;
    font-size: 0.8rem;
    transition: transform 0.3s ease;
    margin-left: 5px;
}

.more-btn.active .icon {
    transform: rotate(180deg);
}

.project-expanded {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0;
}

.project-expanded.active {
    max-height: 500px;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    opacity: 1;
    transition: max-height 0.5s ease, opacity 0.5s ease;
}

.project-divider {
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent);
    margin: 0.5rem 0;
    width: 100%;
}

/* Project Tags */
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.project-tag {
    padding: 0.25rem 0.75rem;
    background-color: rgba(46, 204, 113, 0.15);
    color: #2ecc71;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* Project Links */
.project-links {
    display: flex;
    gap: 1rem;
}

.project-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.project-links a:hover {
    color: var(--accent-primary);
}
/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.certification-card {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    padding: 1.5rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.certification-logo {
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.certification-logo img {
    max-width: 80%;
    max-height: 60px;
    object-fit: contain;
}

.certification-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.certification-issuer {
    color: var(--accent-primary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.certification-date {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.certification-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.certification-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-block;
    transition: all 0.3s ease;
}

.certification-link:hover {
    color: var(--accent-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .menu {
        display: none;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}