/* =============================================
   CYBERSECURITY PORTFOLIO - COMPLETE CSS
   Dark Theme with Neon Green Accent (#DAFF01)
   ============================================= */

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Theme Colors */
    --bg-primary: rgb(17, 17, 19);
    --bg-secondary: rgb(26, 28, 30);
    --bg-tertiary: rgb(38, 40, 42);
    
    /* Text Colors */
    --text-primary: rgb(255, 255, 255);
    --text-secondary: rgb(218, 218, 218);
    --text-muted: rgb(161, 161, 170);
    
    /* Borders */
    --border-primary: rgb(63, 63, 63);
    --border-subtle: rgba(255, 255, 255, 0.1);
    
    /* Neon Green Accent */
    --accent-primary: rgb(218, 255, 1);
    --accent-hover: rgb(166, 190, 21);
    --accent-pressed: rgb(134, 155, 16);
    --accent-bg: rgba(218, 255, 1, 0.1);
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 96px;
    --space-4xl: 128px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(17, 17, 19, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-md) 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(17, 17, 19, 0.95);
    padding: var(--space-sm) 0;
}

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

.nav-logo {
    font-size: 24px;
    font-weight: 900;
    color: var(--text-primary);
    cursor: pointer;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

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

/* ===== CONTAINER ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ===== PAGE SYSTEM ===== */
#app {
    padding-top: 80px;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1550751827-4bd374c3f58b?crop=entropy&cs=srgb&fm=jpg&ixid=M3w4NTYxODF8MHwxfHNlYXJjaHwxfHxjeWJlcnNlY3VyaXR5fGVufDB8fHx8MTc2ODMyNDE5OXww&ixlib=rb-4.1.0&q=85');
    background-size: cover;
    background-position: center;
    filter: brightness(0.3);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(17, 17, 19, 0.8) 0%, rgba(26, 28, 30, 0.6) 100%);
}

.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(218, 255, 1, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(218, 255, 1, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero-greeting {
    font-size: 20px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-name {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -2px;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.name-text {
    display: block;
}

.hero-roles {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-weight: 500;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.role-separator {
    color: var(--accent-primary);
    margin: 0 var(--space-sm);
}

.hero-tagline {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    align-items: center;
    animation: fadeInUp 0.8s ease 0.8s forwards;
    opacity: 0;
}

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

/* ===== BUTTONS ===== */
.btn-primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: 12px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(218, 255, 1, 0.3);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-primary);
    border-radius: 12px;
    padding: 14px 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

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

/* ===== SCROLL INDICATOR ===== */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 2px;
    height: 30px;
    background: linear-gradient(to bottom, var(--accent-primary), transparent);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ===== SECTIONS ===== */
.quick-intro,
.about-section,
.skills-section,
.education-section,
.certifications-section,
.achievements-section,
.experience-section,
.projects-section,
.contact-section {
    padding: var(--space-4xl) 0;
}

.about-section,
.education-section,
.achievements-section,
.projects-section {
    background: var(--bg-primary);
}

.skills-section,
.certifications-section {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ===== INTRO CARDS ===== */
.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.intro-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.intro-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.intro-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.intro-card:hover::before {
    opacity: 1;
}

.intro-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.intro-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.intro-card p {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ===== ABOUT SECTION ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
    align-items: center;
}

.image-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
}

.image-border {
    position: absolute;
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
    border: 2px solid var(--accent-primary);
    border-radius: 16px;
    z-index: -1;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

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

.about-location {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--accent-primary);
    font-weight: 500;
    margin-top: var(--space-md);
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.skill-category {
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    transition: all 0.3s ease;
}

.skill-category:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.skill-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.skill-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.skill-list li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

.skill-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* ===== EDUCATION SECTION ===== */
.education-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-3xl);
    display: flex;
    gap: var(--space-xl);
    align-items: flex-start;
    transition: all 0.3s ease;
    max-width: 900px;
    margin: 0 auto;
}

.education-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.education-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--accent-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

.education-content {
    flex: 1;
}

.education-date {
    font-size: 14px;
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-sm);
}

.education-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 4px;
}

.education-school {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.education-gpa {
    font-size: 18px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.education-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.education-details li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
    line-height: 1.6;
}

.education-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* ===== CERTIFICATIONS ===== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.cert-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.cert-card.cert-clickable {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.cert-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.cert-badge {
    width: 80px;
    height: 80px;
    background: var(--accent-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    color: var(--accent-primary);
}

.cert-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.cert-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.cert-view {
    font-size: 14px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-top: var(--space-md);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cert-clickable:hover .cert-view {
    opacity: 1;
}

/* ===== ACHIEVEMENTS ===== */
.achievement-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 2px solid var(--accent-primary);
    border-radius: 16px;
    padding: var(--space-3xl);
    display: flex;
    gap: var(--space-xl);
    align-items: center;
    transition: all 0.3s ease;
}

.achievement-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(218, 255, 1, 0.2);
}

.achievement-icon {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    background: var(--accent-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

.achievement-content {
    flex: 1;
}

.achievement-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.achievement-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.achievement-description strong {
    color: var(--accent-primary);
}

.achievement-badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
}

/* ===== EXPERIENCE TIMELINE ===== */
.experience-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

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

.timeline-item {
    position: relative;
    padding-left: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

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

.timeline-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    border-color: var(--accent-primary);
    transform: translateX(8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.timeline-date {
    font-size: 14px;
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-sm);
}

.timeline-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.timeline-description {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.timeline-description li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
    line-height: 1.6;
}

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

/* ===== PROJECTS ===== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.project-card-simple {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    transition: all 0.3s ease;
    position: relative;
}

.project-card-simple:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-number {
    font-size: 48px;
    font-weight: 900;
    color: var(--accent-primary);
    opacity: 0.2;
    position: absolute;
    top: 20px;
    right: 30px;
    line-height: 1;
}

.project-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: var(--space-md);
    padding-right: 60px;
}

.project-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

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

.tech-tag {
    font-size: 12px;
    padding: 6px 12px;
    background: var(--accent-bg);
    color: var(--accent-primary);
    border-radius: 8px;
    font-weight: 500;
}

/* ===== CONTACT ===== */
.contact-grid {
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.contact-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: var(--space-xl);
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    color: var(--accent-primary);
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.contact-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

.contact-card a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    display: inline-block;
    font-size: 14px;
}

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

.resume-card {
    grid-column: span 2;
}

.btn-resume {
    display: inline-block;
    margin-top: var(--space-sm);
    padding: 12px 24px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-resume:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(218, 255, 1, 0.3);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-3xl) var(--space-md) var(--space-xl);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.footer-logo {
    font-size: 32px;
    font-weight: 900;
    margin-bottom: var(--space-md);
}

.footer-tagline {
    font-size: 14px;
    color: var(--text-muted);
    max-width: 500px;
    margin: 0 auto;
}

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

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

/* ===== SCROLL ANIMATIONS ===== */
[data-scroll] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-scroll].visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .achievement-card {
        flex-direction: column;
        text-align: center;
    }
    
    .education-card {
        flex-direction: column;
        text-align: center;
    }
    
    .education-icon {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .hero-name {
        font-size: 48px;
    }
    
    .hero-roles {
        font-size: 18px;
    }
    
    .hero-tagline {
        font-size: 16px;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(17, 17, 19, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--space-xl);
        transition: left 0.3s ease;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .intro-grid,
    .skills-grid,
    .certifications-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .experience-timeline::before {
        display: none;
    }
    
    .timeline-item {
        padding-left: 0;
    }
    
    .timeline-marker {
        display: none;
    }
    
    .resume-card {
        grid-column: span 1;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 36px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .achievement-title {
        font-size: 22px;
    }
}