/* Modern Dark Theme Variables */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --card-bg: rgba(30, 41, 59, 0.7);
    --nav-bg: rgba(15, 23, 42, 0.8);
    --border: rgba(148, 163, 184, 0.1);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

a {
    text-decoration: none;
    color: var(--accent);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

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

.section {
    padding: 5rem 0;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background-color: rgba(56, 189, 248, 0.1);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
}

.hamburger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 4rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    z-index: 1;
    max-width: 800px;
}

.hero-subtitle {
    color: var(--accent);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: block;
}

.hero-buttons {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

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

.about-text {
    font-size: 1.1rem;
}

.about-image img {
    width: 100%;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

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

.project-card {
    background-color: var(--card-bg);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    border-color: var(--accent);
}

.project-image {
    width: 100%;
    height: 200px;
    background-color: var(--bg-secondary);
    object-fit: cover;
}

.project-info {
    padding: 1.5rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tag {
    font-size: 0.8rem;
    padding: 0.2rem 0.6rem;
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    border-radius: 1rem;
}

/* Contact/Footer */
footer {
    background-color: var(--bg-secondary);
    padding: 4rem 0 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

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

.social-links a {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.social-links a:hover {
    color: var(--accent);
    transform: scale(1.1);
}

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

    .nav-links {
        display: none;
        position: absolute;
        top: 4rem;
        left: 0;
        width: 100%;
        background-color: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        text-align: center;
        border-bottom: 1px solid var(--border);
    }

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

    .hamburger {
        display: block;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

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

/* Certifications Section */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.cert-card {
    background-color: var(--bg-primary);
    border-radius: 1rem;
    padding: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.cert-icon {
    font-size: 2.5rem;
    color: var(--accent);
    background-color: rgba(56, 189, 248, 0.1);
    padding: 0.5rem;
    border-radius: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    height: 80px;
}

.cert-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.cert-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.cert-issuer {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}

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

.cert-link {
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--border);
    top: 0;
    bottom: 0;
    left: 20px;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 100%;
    margin-bottom: 2rem;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background-color: var(--accent);
    border: 4px solid var(--bg-secondary);
    top: 15px;
    left: 12px;
    border-radius: 50%;
    z-index: 1;
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.2);
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: inline-block;
    padding: 0.2rem 0.8rem;
    background-color: rgba(56, 189, 248, 0.1);
    border-radius: 1rem;
}

.timeline-content {
    padding: 1.5rem;
    background-color: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid var(--border);
    position: relative;
    transition: transform 0.3s ease;
}

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

.timeline-content h3 {
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.timeline-content h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 500;
}

.timeline-content ul {
    list-style-type: none;
    padding-left: 0;
}

.timeline-content ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.timeline-content ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent);
}

@media (max-width: 600px) {
    .timeline::after {
        left: 20px;
    }

    .timeline-item {
        padding-left: 50px;
        padding-right: 0;
    }

    .timeline-dot {
        left: 12px;
    }
}

@media (max-width: 600px) {
    .cert-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}