/* ===============================
   GLOBAL STYLES & RESET
   =============================== */

/* Use box-sizing border-box for all elements to make width/height calculations easier */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Root variables for easy customization - change these colors to update the entire theme */
:root {
    /* Primary color palette */
    --primary-color: #2563eb;        /* Main blue - used for buttons, links, highlights */
    --primary-dark: #1d4ed8;         /* Darker blue - for hover states */
    --secondary-color: #10b981;      /* Green accent - for success states */
    --accent-color: #f59e0b;         /* Orange accent - for special highlights */
    
    /* Light mode colors */
    --bg-primary: #ffffff;           /* Main background */
    --bg-secondary: #f3f4f6;         /* Secondary background */
    --text-primary: #1f2937;         /* Primary text color */
    --text-secondary: #6b7280;       /* Secondary text color */
    --card-bg: #f3f4f6;             /* Card background */
    --shadow: rgba(0, 0, 0, 0.1);   /* Box shadow */
    
    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --font-size-base: 16px;
    
    /* Spacing */
    --section-padding: 60px 0;      /* Reduced from 80px */
    --container-max-width: 1200px;
    
    /* Transitions - for smooth animations */
    --transition: all 0.3s ease;
}

/* Dark mode color scheme */
body.dark-mode {
    --bg-primary: #0f172a;           /* Dark background */
    --bg-secondary: #1e293b;         /* Dark secondary background */
    --text-primary: #f1f5f9;         /* Light text */
    --text-secondary: #cbd5e1;       /* Light secondary text */
    --card-bg: #1e293b;             /* Dark card background */
    --shadow: rgba(0, 0, 0, 0.3);   /* Darker shadow */
}

/* Base body styles */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden; /* Prevent horizontal scroll */
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
}

/* Animated background particles */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.4;
}

.particle {
    position: absolute;
    background: var(--primary-color);
    border-radius: 50%;
    animation: float 20s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    50% {
        transform: translateY(-100px) translateX(100px);
        opacity: 0.6;
    }
}

/* Container class - centers content and limits max width */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Smooth scrolling for navigation links */
html {
    scroll-behavior: smooth;
}

/* ===============================
   NAVIGATION BAR
   =============================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000; /* Keep navbar above all other content */
    transition: var(--transition);
}

/* Add background on scroll - this class is added via JavaScript */
.navbar.scrolled {
    background-color: var(--bg-primary);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

/* Underline animation on hover */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

/* Hamburger menu for mobile - hidden by default */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* Theme toggle button styling */
.theme-toggle {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
}

.theme-toggle:hover {
    background-color: var(--primary-color);
    color: var(--bg-primary);
    transform: rotate(20deg);
}

/* ===============================
   HERO SECTION
   =============================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px; /* Account for fixed navbar */
    background: var(--bg-secondary);
}

/* 
   Hero container uses CSS Grid for two-column layout
   - display: grid = activates grid layout
   - grid-template-columns: 1fr 1fr = creates 2 equal columns (fr = fraction of available space)
   - gap: 60px = space between columns
   - align-items: center = vertically centers content in each column
*/
.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInLeft 1s ease;
}

.hero-title {
    font-size: 40px;        /* Reduced from 48px */
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

/* Highlighted text in hero title */
.highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 26px;        /* Reduced from 32px */
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-description {
    font-size: 16px;        /* Reduced from 18px */
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

/* Hero image with circular border animation */
.hero-image {
    animation: fadeInRight 1s ease;
}

.image-wrapper {
    position: relative;
    width: 100%;
    max-width: 300px;       /* Reduced from 400px */
    margin: 0 auto;
}

.image-wrapper img {
    width: 100%;
    height: auto;
    border-radius: 50%;
    border: 4px solid var(--primary-color);     /* Reduced from 5px */
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.3);
    transition: var(--transition);
}

.image-wrapper img:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(37, 99, 235, 0.4);
}

/* ===============================
   BUTTONS
   =============================== */

.btn {
    display: inline-block;
    padding: 10px 24px;        /* Reduced from 12px 30px */
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 15px;
    background: none;
    font-family: var(--font-family);
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(37, 99, 235, 0.4);
}

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

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

.btn i {
    margin-left: 8px;
    transition: transform 0.3s ease;
}

.btn.rotated i {
    transform: rotate(180deg);
}

/* ===============================
   SECTION TITLES
   =============================== */

.section-title {
    font-size: 36px;        /* Reduced from 42px */
    font-weight: 700;
    text-align: center;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 16px;        /* Reduced from 18px */
    margin-bottom: 40px;    /* Reduced from 50px */
}

/* ===============================
   ABOUT SECTION
   =============================== */

.about {
    padding: var(--section-padding);
    background-color: var(--bg-primary);
}

/* 
   About content layout - two columns with different widths
   - 2fr 1fr = left column is twice as wide as right column
   - Text takes 2/3 of space, stats take 1/3
   Change to "1fr 1fr" for equal columns
*/
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.about-text h3 {
    font-size: 24px;        /* Reduced from 28px */
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

/* Statistics cards */
.stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-item {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    padding: 20px;          /* Reduced from 25px */
    border-radius: 12px;    /* Reduced from 15px */
    text-align: center;
    color: #ffffff;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

.stat-item h4 {
    font-size: 30px;        /* Reduced from 36px */
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 14px;
    opacity: 0.9;
}

/* Services/What I Do section */
.services {
    margin-top: 60px;
}

.services-title {
    font-size: 28px;        /* Reduced from 32px */
    text-align: center;
    margin-bottom: 30px;    /* Reduced from 40px */
    color: var(--text-primary);
}

/* 
   Services grid - automatically adjusts number of columns based on screen size
   - auto-fit = automatically fits as many columns as possible
   - minmax(250px, 1fr) = each card is minimum 250px, maximum equal width
   - This creates a responsive grid that wraps cards to new rows automatically
   - To have fixed columns, replace with: grid-template-columns: 1fr 1fr 1fr (for 3 columns)
*/
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--card-bg);
    padding: 24px;          /* Reduced from 30px */
    border-radius: 12px;    /* Reduced from 15px */
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    background-color: var(--bg-primary);
    box-shadow: 0 8px 24px var(--shadow);
    transform: translateY(-5px);
}

.service-card i {
    font-size: 40px;        /* Reduced from 48px */
    color: var(--primary-color);
    margin-bottom: 16px;    /* Reduced from 20px */
}

.service-card h4 {
    font-size: 19px;        /* Reduced from 22px */
    margin-bottom: 12px;    /* Reduced from 15px */
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 14px;
}

/* ===============================
   EXPERIENCE & EDUCATION SECTION
   =============================== */

.experience {
    padding: var(--section-padding);
    background-color: var(--bg-secondary);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
}

.timeline-category {
    font-size: 28px;
    color: var(--primary-color);
    margin: 40px 0 30px 0;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--primary-color);
}

.timeline-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-badge {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    padding: 10px 20px;
    border-radius: 50px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
    height: fit-content;
}

.timeline-content {
    background-color: var(--bg-primary);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.timeline-content h4 {
    font-size: 19px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-content h5 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-date {
    display: inline-block;
    background-color: var(--card-bg);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.timeline-description {
    overflow: hidden;
    max-height: 8em;
    transition: max-height 0.3s ease;
}

.timeline-description.expanded {
    max-height: none;
}

.timeline-description p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.7;
    font-size: 14px;
}

.timeline-description ul {
    margin-top: 0;
    margin-left: 20px;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 14px;
}

.timeline-description:not(.expanded) ul li:nth-child(n+4) {
    display: none;
}

.timeline-description ul li {
    margin-bottom: 8px;
}

.timeline-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
}

.expand-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    padding: 5px 0;
    transition: var(--transition);
}

.expand-btn:hover {
    color: var(--primary-dark);
}

.credentials-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.credentials-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===============================
   PROJECTS SECTION
   =============================== */

.projects {
    padding: var(--section-padding);
    background-color: var(--bg-primary);
}

/* 
   Projects grid - responsive layout for project cards
   - Each card is minimum 320px wide
   - Cards automatically wrap to new rows on smaller screens
   - To show 2 cards per row, use: grid-template-columns: 1fr 1fr
   - To show 3 cards per row, use: grid-template-columns: 1fr 1fr 1fr
*/
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.project-card {
    background-color: var(--card-bg);
    padding: 24px;          /* Reduced from 30px */
    border-radius: 12px;    /* Reduced from 15px */
    transition: var(--transition);
    border: 2px solid transparent;
}

.project-card:hover {
    background-color: var(--bg-primary);
    border-color: var(--primary-color);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.2);
    transform: translateY(-5px);
}

.project-card h4 {
    font-size: 19px;        /* Reduced from 22px */
    color: var(--text-primary);
    margin-bottom: 12px;    /* Reduced from 15px */
}

.project-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;    /* Reduced from 20px */
    font-size: 14px;
}

.project-card.hidden {
    display: none;
}

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

.project-tags span {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 4px 10px;      /* Reduced from 5px 12px */
    border-radius: 20px;
    font-size: 11px;        /* Reduced from 12px */
    font-weight: 500;
}

.view-all {
    text-align: center;
    margin-top: 40px;
}

/* ===============================
   SKILLS SECTION
   =============================== */

/* ===============================
   SKILLS SECTION
   =============================== */

.skills {
    padding: var(--section-padding);
    background-color: var(--bg-secondary);
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.skill-category {
    background-color: var(--bg-primary);
    padding: 24px;
    border-radius: 12px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.skill-category:hover {
    border-color: var(--primary-color);
}

.skill-category h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tags span {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

.skill-tags span:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .skills-container {
        grid-template-columns: 1fr;
    }
}

/* ===============================
   CERTIFICATIONS SECTION
   =============================== */

.certifications {
    padding: var(--section-padding);
    background-color: var(--bg-primary);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.cert-card {
    background-color: var(--card-bg);
    padding: 24px;          /* Reduced from 30px */
    border-radius: 12px;    /* Reduced from 15px */
    transition: var(--transition);
}

.cert-card:hover {
    background-color: var(--bg-primary);
    box-shadow: 0 8px 24px var(--shadow);
    transform: translateY(-5px);
}

.cert-card.hidden {
    display: none;
}

.cert-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.cert-header i {
    font-size: 28px;        /* Reduced from 32px */
    color: var(--accent-color);
}

.cert-card h4 {
    font-size: 18px;        /* Reduced from 20px */
    color: var(--text-primary);
}

.cert-card h5 {
    font-size: 15px;        /* Reduced from 16px */
    color: var(--primary-color);
    margin-bottom: 10px;
}

.cert-date {
    display: inline-block;
    background-color: var(--bg-primary);
    padding: 4px 12px;      /* Reduced from 5px 15px */
    border-radius: 20px;
    font-size: 13px;        /* Reduced from 14px */
    color: var(--text-secondary);
    margin-bottom: 12px;    /* Reduced from 15px */
}

.cert-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.cert-skills span {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    padding: 4px 10px;      /* Reduced from 5px 12px */
    border-radius: 15px;
    font-size: 11px;        /* Reduced from 12px */
}

/* ===============================
   CONTACT SECTION
   =============================== */

.contact {
    padding: var(--section-padding);
    background-color: var(--bg-secondary);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3,
.contact-form h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* Form styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--card-bg);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 15px;
    transition: var(--transition);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

.form-status {
    margin-top: 15px;
    padding: 12px;
    border-radius: 8px;
    display: none;
}

.form-status.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.form-status.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Contact information items */
.contact-item {
    display: flex;
    align-items: start;
    gap: 16px;
    margin-bottom: 24px;
    padding: 16px;
    background-color: var(--bg-primary);
    border-radius: 10px;
    transition: var(--transition);
}

.contact-item:hover {
    box-shadow: 0 4px 16px var(--shadow);
}

.contact-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-item h4 {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

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

/* Social links section */
.social-links {
    margin-top: 30px;
}

.social-links h4 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 2px solid transparent;
    transition: var(--transition);
}

.social-btn i {
    font-size: 24px;
}

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

@media (max-width: 768px) {
    .contact-container {
        grid-template-columns: 1fr;
    }
}

/* ===============================
   FOOTER
   =============================== */

.footer {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 24px 0;        /* Reduced from 30px */
    text-align: center;
}

.footer p {
    margin: 5px 0;
    opacity: 0.8;
}

/* ===============================
   ANIMATIONS
   =============================== */

/* 
   Fade in from left animation
   - Starts invisible (opacity: 0) and 50px to the left
   - Ends visible (opacity: 1) at normal position
   - Used for hero text content
   Change -50px to -100px for more dramatic slide-in effect
*/
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 
   Fade in from right animation
   - Starts invisible and 50px to the right
   - Ends visible at normal position
   - Used for hero image
*/
@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 
   ===============================
   RESPONSIVE DESIGN - TABLET
   Applies when screen width is 968px or less
   =============================== 
*/

@media (max-width: 968px) {
    /* 
       Hero section stacks vertically on tablets
       - Changes from 2 columns to 1 column
       - Centers all text
    */
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .image-wrapper {
        margin: 0 auto;
    }
    
    /* About section stacks vertically */
    .about-content {
        grid-template-columns: 1fr;
    }
    
    /* Timeline adjusts for tablets */
    .timeline-item {
        grid-template-columns: 120px 1fr;
        gap: 20px;
    }
    
    /* Contact section stacks vertically */
    .contact-container {
        grid-template-columns: 1fr;
    }
}

/* 
   ===============================
   RESPONSIVE DESIGN - MOBILE
   Applies when screen width is 768px or less (phones)
   =============================== 
*/

@media (max-width: 768px) {
    /* Show hamburger menu icon on mobile devices */
    .hamburger {
        display: flex;
    }
    
    /* 
       Hide navigation links by default on mobile
       - position: absolute = takes menu out of normal flow
       - transform: translateY(-100%) = hides menu above viewport
       - opacity: 0 = makes menu invisible
       - pointer-events: none = disables clicking when hidden
       - JavaScript adds 'active' class to show menu
    */
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }
    
    /* 
       Show navigation when active class is added via JavaScript
       - transform: translateY(0) = moves menu to visible position
       - opacity: 1 = makes menu fully visible
       - pointer-events: all = enables clicking
       - This class is toggled by hamburger menu click
    */
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    /* Adjust text sizes for mobile */
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 24px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    /* Stack buttons vertically on mobile */
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    /* Timeline becomes single column on mobile */
    .timeline-item {
        grid-template-columns: 1fr;
    }
    
    .timeline-badge {
        width: fit-content;
    }
    
    /* Projects grid adjusts for mobile */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* Social buttons in contact section */
    .social-buttons {
        width: 100%;
    }
}

@media (max-width: 480px) {
    /* Further adjustments for very small screens */
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .container {
        padding: 0 15px;
    }
}