/* ===== Variables ===== */
:root {
    --primary: #0066cc;
    --primary-dark: #004d99;
    --secondary: #1a1a2e;
    --accent: #00d4ff;
    --bg-dark: #0f0f1a;
    --bg-card: #16162a;
    --bg-card-hover: #1e1e3a;
    --text: #ffffff;
    --text-muted: #a0a0b0;
    --border: #2a2a4a;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text);
    transition: 0.3s;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 100px 20px 50px;
    position: relative;
    background: radial-gradient(ellipse at top right, rgba(0, 102, 204, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at bottom left, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-subtitle {
    color: var(--accent);
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 20px;
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: var(--text);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.3);
    color: var(--text);
}

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

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

.hero-image {
    display: flex;
    justify-content: center;
}

.hero-image-wrapper {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: var(--gradient);
    padding: 5px;
    position: relative;
}

.hero-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.hero-image-placeholder {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    font-weight: 700;
    color: var(--primary);
}

.hero-image-wrapper img + .hero-image-placeholder {
    display: none;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.scroll-indicator {
    width: 2px;
    height: 30px;
    background: var(--border);
    position: relative;
    overflow: hidden;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--accent);
    animation: scroll 1.5s ease-in-out infinite;
}

@keyframes scroll {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
}

/* ===== Stats Section ===== */
.stats {
    padding: 60px 20px;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Sections ===== */
.section {
    padding: 100px 20px;
}

.section-dark {
    background: var(--bg-card);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 60px;
}

.subsection-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 60px 0 30px;
    text-align: center;
}

/* ===== Skills Grid ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 30px;
    transition: all 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.1);
}

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.skill-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.skill-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Certifications ===== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.cert-card:hover {
    border-color: var(--primary);
}

.cert-logo {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent);
    background: rgba(0, 212, 255, 0.1);
    padding: 10px;
    border-radius: 8px;
    min-width: 60px;
    text-align: center;
}

.cert-info h4 {
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.cert-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Tools Section ===== */
.tools-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.tools-category {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 25px;
}

.tools-category h3 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: var(--accent);
}

.tools-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tool-tag {
    background: var(--bg-card-hover);
    border: 1px solid var(--border);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.tool-tag:hover {
    border-color: var(--primary);
    background: rgba(0, 102, 204, 0.1);
}

/* ===== Projects ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 30px;
    transition: all 0.3s ease;
}

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

.project-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.project-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.project-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

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

.project-tags span {
    background: rgba(0, 102, 204, 0.1);
    color: var(--accent);
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
}

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

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

.timeline-item {
    position: relative;
    padding-left: 40px;
    padding-bottom: 50px;
}

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

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gradient);
    border: 3px solid var(--bg-dark);
}

.timeline-content {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 25px;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
    flex-wrap: wrap;
    gap: 10px;
}

.timeline-header h3 {
    font-size: 1.2rem;
}

.timeline-date {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 500;
}

.timeline-company {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.timeline-list {
    list-style: disc;
    padding-left: 20px;
}

.timeline-list li {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

/* ===== Education ===== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 30px;
    display: flex;
    gap: 25px;
    transition: all 0.3s ease;
}

.education-card:hover {
    border-color: var(--primary);
}

.education-year {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.education-content h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.education-field {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.education-school {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-text h4 {
    font-size: 1rem;
    margin-bottom: 5px;
}

.contact-text p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

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

/* Terminal */
.contact-terminal {
    background: #1e1e2e;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.terminal-header {
    background: #2a2a3e;
    padding: 12px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27ca40; }

.terminal-title {
    margin-left: 10px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
}

.terminal-body {
    padding: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.terminal-line {
    display: flex;
    gap: 10px;
    margin-bottom: 5px;
}

.terminal-prompt {
    color: var(--accent);
}

.terminal-command {
    color: var(--text);
}

.terminal-output {
    color: var(--text-muted);
    margin-bottom: 15px;
    padding-left: 20px;
}

.terminal-cursor {
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
    padding: 50px 20px 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    color: var(--text-muted);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin: 0 auto 30px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-image-wrapper {
        width: 280px;
        height: 280px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certifications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-categories {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skills-grid,
    .projects-grid,
    .education-grid {
        grid-template-columns: 1fr;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-categories {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .hero-image-wrapper {
        width: 220px;
        height: 220px;
    }
}