/* CSS Variables */
:root {
    --primary: #0a192f;
    --secondary: #112240;
    --accent: #64ffda;
    --accent-hover: #4fd1b0;
    --text-primary: #ccd6f6;
    --text-secondary: #8892b0;
    --text-dark: #0a192f;
    --white: #ffffff;
    --gradient-start: #0a192f;
    --gradient-end: #112240;
    --card-bg: rgba(17, 34, 64, 0.7);
    --border-color: rgba(100, 255, 218, 0.1);
    --shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    transition: var(--transition);
}

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

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
}

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

.nav-links a {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.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(--accent);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 24px 60px;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
}

.hero-content {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

.hero-name {
    font-size: clamp(40px, 8vw, 72px);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 8px;
}

.hero-title {
    font-size: clamp(18px, 4vw, 24px);
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 24px;
}

.hero-description {
    max-width: 540px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 32px;
}

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

.btn {
    display: inline-block;
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--text-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(100, 255, 218, 0.2);
}

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

.btn-secondary:hover {
    background: rgba(100, 255, 218, 0.1);
    transform: translateY(-2px);
}

.hero-social {
    display: flex;
    gap: 24px;
}

.hero-social a {
    color: var(--text-secondary);
    transition: var(--transition);
}

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

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 48px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
}

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

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

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 16px;
    line-height: 1.8;
}

.about-text strong {
    color: var(--text-primary);
}

.about-highlights {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.highlight-card {
    flex: 0 1 calc(50% - 10px);
    min-width: 200px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

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

.highlight-number {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.highlight-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Experience Timeline */
.timeline {
    position: relative;
    padding-left: 40px;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

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

.timeline-marker {
    position: absolute;
    left: -46px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--accent);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 28px;
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.timeline-header {
    margin-bottom: 16px;
}

.timeline-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-company {
    display: block;
    color: var(--accent);
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 4px;
}

.timeline-date {
    display: block;
    color: var(--text-secondary);
    font-size: 13px;
}

.timeline-details {
    list-style: none;
}

.timeline-details li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.timeline-details li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.timeline-details strong {
    color: var(--text-primary);
}

/* Projects Grid */
.projects {
    background: var(--secondary);
}

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

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 32px;
    transition: var(--transition);
}

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

.project-icon {
    color: var(--accent);
    margin-bottom: 20px;
}

.project-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.project-tags span {
    background: rgba(100, 255, 218, 0.1);
    color: var(--accent);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 20px;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.skill-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 28px;
    transition: var(--transition);
}

.skill-category:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.skill-category h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.skill-category ul li {
    color: var(--text-secondary);
    font-size: 14px;
    padding: 6px 0;
    position: relative;
    padding-left: 16px;
}

.skill-category ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.6;
}

/* Contact Section */
.contact {
    background: var(--secondary);
    text-align: center;
}

.contact .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

.contact-intro {
    max-width: 500px;
    margin: 0 auto 40px;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
}

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

.contact-link {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 14px 24px;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.contact-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
}

.contact-link svg {
    color: var(--accent);
}

/* Footer */
.footer {
    background: var(--primary);
    padding: 24px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-secondary);
    font-size: 13px;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--secondary);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 120px 24px 60px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        text-align: center;
    }

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

    .timeline {
        padding-left: 24px;
    }

    .timeline-marker {
        left: -30px;
        width: 10px;
        height: 10px;
    }
}