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

:root {
    /* Colors */
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --dark-lighter: #334155;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--light);
    background: var(--dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo a:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

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

.nav-link {
    color: var(--light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

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

.nav-link:hover {
    color: #00f2fe;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--light);
    transition: var(--transition);
    border-radius: 3px;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 8rem 2rem 4rem;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-family: var(--font-heading);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 1.5rem;
    min-height: 2.5rem;
}

.typing-text {
    display: inline-block;
}

.cursor {
    animation: blink 1s infinite;
}

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

.hero-description {
    font-size: 1.2rem;
    color: var(--gray-light);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.btn {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(79, 172, 254, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.4);
}

.btn-full {
    width: 100%;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.scroll-indicator span {
    width: 2px;
    height: 20px;
    background: var(--gray);
    animation: scroll 2s infinite;
}

.scroll-indicator span:nth-child(2) {
    animation-delay: 0.3s;
}

.scroll-indicator span:nth-child(3) {
    animation-delay: 0.6s;
}

@keyframes scroll {
    0%, 100% {
        opacity: 0;
        transform: translateY(-10px);
    }
    50% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   SECTIONS
   ========================================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-tag {
    display: inline-block;
    color: var(--secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-family: var(--font-heading);
    font-weight: 800;
    margin-bottom: 1rem;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about {
    background: var(--dark-light);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text .lead {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-text p {
    color: var(--gray-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--gradient-accent);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: rgba(255, 255, 255, 0.3);
}

/* ==========================================
   EXPERTISE SECTION
   ========================================== */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.expertise-card {
    background: var(--dark-light);
    padding: 2.5rem;
    border-radius: 20px;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.expertise-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.2);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-accent);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--dark);
    margin-bottom: 1.5rem;
}

.expertise-card h3 {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--light);
}

.expertise-card p {
    color: var(--gray-light);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.expertise-list {
    list-style: none;
}

.expertise-list li {
    color: var(--gray);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.expertise-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* ==========================================
   VENTURES SECTION
   ========================================== */
.ventures {
    background: var(--dark-light);
}

.ventures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.venture-card {
    background: var(--dark);
    padding: 2.5rem;
    border-radius: 20px;
    transition: var(--transition);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.venture-card:hover {
    transform: translateY(-10px);
    border-color: var(--secondary);
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.2);
}

.venture-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.venture-header i {
    font-size: 2.5rem;
    color: var(--secondary);
}

.venture-header h3 {
    font-size: 1.3rem;
    font-family: var(--font-heading);
    font-weight: 700;
}

.venture-description {
    color: var(--gray-light);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.venture-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.feature-tag {
    background: rgba(79, 172, 254, 0.2);
    color: #4facfe;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ==========================================
   SKILLS SECTION
   ========================================== */
.skills-container {
    display: grid;
    gap: 3rem;
}

.skills-category h3 {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--light);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tag {
    background: var(--dark-light);
    color: var(--light);
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact {
    background: var(--dark-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--gray-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--gray-light);
}

.contact-item i {
    color: var(--secondary);
    font-size: 1.2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 50px;
    height: 50px;
    background: var(--dark);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--gradient-accent);
    color: var(--dark);
    transform: translateY(-5px);
    border-color: transparent;
}

.contact-form {
    background: var(--dark);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--dark-light);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--light);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--dark);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content p {
    color: var(--gray);
    margin-bottom: 0.5rem;
}

.footer-tagline {
    color: var(--gray-light);
    font-weight: 600;
}

/* ==========================================
   ANIMATIONS
   ========================================== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--dark-light);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

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

    .expertise-grid,
    .ventures-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .hero {
        padding: 6rem 1rem 3rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

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

    .expertise-card {
        padding: 1.5rem;
    }

    .contact-form {
        padding: 1.5rem;
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 2rem; }
.mt-4 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 2rem; }
.mb-4 { margin-bottom: 3rem; }

/* ==========================================
   PROFESSIONAL EXPERIENCE SECTION
   ========================================== */
.experience {
    background: var(--dark);
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: var(--gradient-accent);
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
    display: flex;
    justify-content: flex-end;
    padding-right: calc(50% + 40px);
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: calc(50% + 40px);
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: 4px solid var(--dark);
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.5);
}

.timeline-content {
    background: var(--dark-light);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(37, 99, 235, 0.2);
}

.timeline-header h3 {
    font-size: 1.6rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--light);
    margin-bottom: 0.5rem;
}

.timeline-company {
    display: block;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-date {
    display: inline-block;
    background: rgba(79, 172, 254, 0.2);
    color: #4facfe;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.timeline-description {
    color: var(--gray-light);
    margin: 1.5rem 0;
    line-height: 1.7;
}

.timeline-achievements {
    list-style: none;
    margin-top: 1.5rem;
}

.timeline-achievements li {
    color: var(--gray-light);
    padding: 0.7rem 0 0.7rem 2rem;
    position: relative;
    line-height: 1.6;
}

.timeline-achievements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Client Impact Grid */
.client-impact {
    margin-top: 5rem;
    padding: 3rem;
    background: var(--dark-light);
    border-radius: 20px;
}

.impact-title {
    text-align: center;
    font-size: 2rem;
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 3rem;
    color: var(--light);
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.impact-card {
    background: var(--dark);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.impact-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

.impact-card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.impact-card h4 {
    font-size: 1.3rem;
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--light);
}

.impact-card p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ==========================================
   CERTIFICATIONS SECTION
   ========================================== */
.certifications {
    background: var(--dark-light);
}

.featured-cert {
    background: var(--gradient-accent);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 4rem;
    box-shadow: 0 20px 60px rgba(79, 172, 254, 0.3);
}

.featured-cert-content {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.cert-badge {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--dark);
}

.cert-info h3 {
    font-size: 2rem;
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.cert-issuer {
    font-size: 1.1rem;
    font-weight: 600;
    color: rgba(15, 23, 42, 0.8);
    margin-bottom: 1rem;
}

.cert-description {
    color: var(--dark);
    line-height: 1.7;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.cert-card {
    background: var(--dark);
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    text-align: center;
}

.cert-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
}

.cert-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--dark);
    margin: 0 auto 1.5rem;
}

.cert-card h4 {
    font-size: 1.2rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--light);
    margin-bottom: 0.5rem;
}

.cert-source {
    color: var(--secondary);
    font-weight: 600;
}

.education {
    background: var(--dark);
    padding: 2.5rem;
    border-radius: 15px;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.education-content {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.education-content i {
    font-size: 4rem;
    color: var(--primary);
}

.education-info h3 {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--light);
    margin-bottom: 0.5rem;
}

.education-info p {
    color: var(--gray);
    font-size: 1.1rem;
}

/* ==========================================
   RESPONSIVE UPDATES
   ========================================== */
@media (max-width: 968px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-right: 0;
        padding-left: 60px;
    }

    .timeline-item:nth-child(even) {
        padding-left: 60px;
    }

    .timeline-marker {
        left: 20px;
    }

    .featured-cert-content {
        flex-direction: column;
        text-align: center;
    }

    .education-content {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 640px) {
    .cert-grid {
        grid-template-columns: 1fr;
    }

    .featured-cert {
        padding: 2rem;
    }

    .timeline-content {
        padding: 1.5rem;
    }
}