/* css base styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* container for consistent spacing */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* fonts and stuff */
h1, h2, h3 {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 600;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

/* nav bar */
.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    text-decoration: none;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: -0.5px;
}

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

.nav-link {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #2563eb;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.theme-toggle:hover {
    background-color: #f3f4f6;
}

/* mobile menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* hero section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #1e293b;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 700;
    letter-spacing: -1px;
}

.highlight {
    color: #2563eb;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #64748b;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: #475569;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-block;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: 0.3px;
}

.btn-primary {
    background-color: #2563eb;
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-secondary:hover {
    background-color: #2563eb;
    color: white;
}

.profile-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: white;
    margin: 0 auto;
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.3);
}

.profile-picture {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    margin: 0 auto;
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.3);
    overflow: hidden;
    border: 4px solid #ffffff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-picture:hover {
    transform: scale(1.05);
    box-shadow: 0 25px 50px rgba(37, 99, 235, 0.4);
}

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

/* about section */
.about {
    padding: 80px 0;
    background-color: #ffffff;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: #1e293b;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

.about-text p {
    font-size: 1.1rem;
    color: #475569;
    margin-bottom: 1.5rem;
}

.skills h3 {
    margin-bottom: 1.5rem;
    color: #1e293b;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background-color: #e2e8f0;
    color: #475569;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* projects section */
.projects {
    padding: 80px 0;
    background-color: #f8fafc;
}

/* Project Controls */
.project-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
    align-items: center;
}

.search-container {
    width: 100%;
    max-width: 500px;
}

.search-input {
    width: 100%;
    padding: 12px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 25px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: white;
}

.search-input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 10px 24px;
    border: 2px solid #e5e7eb;
    background-color: white;
    color: #475569;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: #2563eb;
    color: #2563eb;
    transform: translateY(-2px);
}

.filter-btn.active {
    background-color: #2563eb;
    color: white;
    border-color: #2563eb;
}

/* Loading State */
.loading-state {
    text-align: center;
    padding: 4rem 2rem;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border: 4px solid #e5e7eb;
    border-top: 4px solid #2563eb;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error State */
.error-state {
    text-align: center;
    padding: 4rem 2rem;
}

.error-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
}

.error-state p {
    color: #dc2626;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    color: #64748b;
    font-size: 1.1rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    align-items: start;
}

.project-card {
    background-color: white;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
    overflow: hidden;
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease forwards;
    display: flex;
    flex-direction: column;
    min-height: 240px;
}

.project-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    border-color: #cbd5e1;
}

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

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

.project-image {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: 12px;
}

.project-placeholder {
    font-size: 2rem;
}

.project-title {
    color: #1e293b;
    font-size: 1.15rem;
    margin: 0 0 0.25rem 0;
    font-weight: 600;
    line-height: 1.3;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.project-description {
    color: #475569;
    line-height: 1.6;
    font-size: 0.95rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background-color: #dbeafe;
    color: #1e40af;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* contact section */
.contact {
    padding: 80px 0;
    background-color: #ffffff;
}

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

.contact-info h3 {
    margin-bottom: 1rem;
    color: #1e293b;
}

.contact-info p {
    color: #475569;
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-icon {
    font-size: 1.2rem;
}

.contact-item a {
    color: #2563eb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #1d4ed8;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.error-message {
    display: block;
    color: #dc2626;
    font-size: 0.875rem;
    margin-top: 0.5rem;
    min-height: 1.25rem;
}

.success-message {
    padding: 1rem;
    background-color: #d1fae5;
    color: #065f46;
    border-radius: 6px;
    margin-top: 1rem;
    text-align: center;
    font-weight: 500;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ============================================
   DYNAMIC CONTENT STYLES
   ============================================ */

/* Time-based greeting */
.time-greeting {
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 0.5rem;
    animation: fadeInDown 0.6s ease-out;
}

/* Section Navigation */
.section-navigation {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    padding: 1.5rem 0;
    border-bottom: 2px solid #e2e8f0;
}

.section-nav-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid #e2e8f0;
    background-color: transparent;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #64748b;
    transition: all 0.3s ease;
}

.section-nav-btn:hover {
    border-color: #2563eb;
    color: #2563eb;
    transform: translateY(-2px);
}

.section-nav-btn.active {
    background-color: #2563eb;
    border-color: #2563eb;
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Project Card Expand/Collapse */
.project-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    padding: 1.5rem;
    background-color: transparent;
    transition: all 0.3s ease;
}

.project-header:hover {
    background-color: #f8fafc;
}

.project-header-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project-category-badge {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    background-color: #dbeafe;
    color: #1e40af;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    width: fit-content;
    letter-spacing: 0.5px;
}

.project-expand-btn {
    background-color: #f1f5f9;
    border: none;
    cursor: pointer;
    padding: 0.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    flex-shrink: 0;
    color: #475569;
}

.project-expand-btn:hover {
    background-color: #2563eb;
    color: white;
    transform: scale(1.1);
}

.expand-icon {
    font-size: 0.9rem;
    transition: transform 0.3s ease;
    display: inline-block;
}

/* Expandable project card content */
.project-card .project-content {
    padding: 1.5rem;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card.expanded .project-content {
    max-height: 500px;
    opacity: 1;
}

.project-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background-color: #f0f9ff;
    color: #0369a1;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.project-link:hover {
    background-color: #0284c7;
    color: white;
    transform: translateX(2px);
}

.project-link.demo-link {
    background-color: #f0fdf4;
    color: #16a34a;
}

.project-link.demo-link:hover {
    background-color: #16a34a;
    color: white;
}

.project-link.github-link {
    background-color: #f5f3ff;
    color: #7c3aed;
}

.project-link.github-link:hover {
    background-color: #7c3aed;
    color: white;
}

.external-icon {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.project-link:hover .external-icon {
    transform: translateY(-2px);
}

/* Fade in down animation */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dark mode adjustments for dynamic content */
.dark-mode .section-navigation {
    border-bottom-color: #475569;
}

.dark-mode .section-nav-btn {
    border-color: #475569;
    color: #cbd5e1;
}

.dark-mode .section-nav-btn:hover {
    border-color: #3b82f6;
    color: #3b82f6;
}

.dark-mode .section-nav-btn.active {
    background-color: #3b82f6;
    border-color: #3b82f6;
    color: white;
}

.dark-mode .project-category-badge {
    background-color: #0c4a6e;
    color: #38bdf8;
}

.dark-mode .project-expand-btn:hover {
    background-color: #475569;
}

.dark-mode .project-links {
    border-top-color: #475569;
}

.dark-mode .project-link {
    background-color: #0c4a6e;
    color: #38bdf8;
}

.dark-mode .project-link:hover {
    background-color: #0369a1;
    color: white;
}

.dark-mode .project-link.demo-link {
    background-color: #143c1d;
    color: #86efac;
}

.dark-mode .project-link.demo-link:hover {
    background-color: #16a34a;
    color: white;
}

.dark-mode .project-link.github-link {
    background-color: #2e1065;
    color: #c084fc;
}

.dark-mode .project-link.github-link:hover {
    background-color: #7c3aed;
    color: white;
}

.dark-mode .time-greeting {
    color: #cbd5e1;
}

/* Footer */
.footer {
    background-color: #1e293b;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* dark mode */
.dark-mode {
    background-color: #1e293b !important;
    color: #e2e8f0 !important;
}

.dark-mode .navbar {
    background-color: #334155 !important;
}

.dark-mode .nav-logo a {
    color: #3b82f6 !important;
}

.dark-mode .nav-link {
    color: #e2e8f0 !important;
}

.dark-mode .nav-link:hover {
    color: #3b82f6 !important;
}

.dark-mode .hero {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%) !important;
}

.dark-mode .hero-title {
    color: #e2e8f0 !important;
}

.dark-mode .hero-subtitle {
    color: #cbd5e1 !important;
}

.dark-mode .hero-description {
    color: #94a3b8 !important;
}

.dark-mode .about {
    background-color: #1e293b !important;
}

.dark-mode .section-title {
    color: #e2e8f0 !important;
}

.dark-mode .about-text p {
    color: #cbd5e1 !important;
}

.dark-mode .skills h3 {
    color: #e2e8f0 !important;
}

.dark-mode .skill-tag {
    background-color: #475569 !important;
    color: #cbd5e1 !important;
}

.dark-mode .projects {
    background-color: #334155 !important;
}

.dark-mode .search-input {
    background-color: #475569 !important;
    border-color: #64748b !important;
    color: #e2e8f0 !important;
}

.dark-mode .search-input:focus {
    border-color: #3b82f6 !important;
}

.dark-mode .filter-btn {
    background-color: #475569 !important;
    border-color: #64748b !important;
    color: #cbd5e1 !important;
}

.dark-mode .filter-btn:hover {
    border-color: #3b82f6 !important;
    color: #3b82f6 !important;
}

.dark-mode .filter-btn.active {
    background-color: #3b82f6 !important;
    border-color: #3b82f6 !important;
    color: white !important;
}

.dark-mode .project-card {
    background-color: #475569 !important;
}

.dark-mode .project-header {
    background-color: transparent !important;
}

.dark-mode .project-header:hover {
    background-color: #334155 !important;
}

.dark-mode .project-expand-btn {
    background-color: #334155 !important;
    color: #cbd5e1 !important;
}

.dark-mode .project-expand-btn:hover {
    background-color: #3b82f6 !important;
    color: white !important;
}

.dark-mode .project-category-badge {
    background-color: #1e40af !important;
    color: #bfdbfe !important;
}

.dark-mode .project-image {
    background: linear-gradient(135deg, #1e3a8a, #1e40af) !important;
}

.dark-mode .project-card {
    background-color: #475569 !important;
    border-color: #64748b !important;
}

.dark-mode .project-title {
    color: #e2e8f0 !important;
}

.dark-mode .project-description {
    color: #cbd5e1 !important;
}

.dark-mode .tech-tag {
    background-color: #1e40af !important;
    color: #dbeafe !important;
}

.dark-mode .project-link {
    background-color: #0c4a6e !important;
    color: #38bdf8 !important;
}

.dark-mode .project-link:hover {
    background-color: #0369a1 !important;
    color: white !important;
}

.dark-mode .project-link.demo-link {
    background-color: #143c1d !important;
    color: #86efac !important;
}

.dark-mode .project-link.demo-link:hover {
    background-color: #16a34a !important;
    color: white !important;
}

.dark-mode .project-link.github-link {
    background-color: #2e1065 !important;
    color: #c084fc !important;
}

.dark-mode .project-link.github-link:hover {
    background-color: #7c3aed !important;
    color: white !important;
}
.dark-mode .empty-state p {
    color: #cbd5e1 !important;
}

.dark-mode .spinner {
    border-color: #64748b !important;
    border-top-color: #3b82f6 !important;
}

.dark-mode .project-title {
    color: #e2e8f0 !important;
}

.dark-mode .project-description {
    color: #cbd5e1 !important;
}

.dark-mode .project-link {
    color: #3b82f6 !important;
}

.dark-mode .project-link:hover {
    color: #60a5fa !important;
}

.dark-mode .tech-tag {
    background-color: #1e40af !important;
    color: #dbeafe !important;
}

.dark-mode .contact {
    background-color: #1e293b !important;
}

.dark-mode .contact-info h3 {
    color: #e2e8f0 !important;
}

.dark-mode .contact-info p {
    color: #cbd5e1 !important;
}

.dark-mode .contact-item a {
    color: #3b82f6 !important;
}

.dark-mode .contact-item a:hover {
    color: #60a5fa !important;
}

.dark-mode .form-group label {
    color: #e2e8f0 !important;
}

.dark-mode .form-group input,
.dark-mode .form-group textarea {
    background-color: #475569 !important;
    border-color: #64748b !important;
    color: #e2e8f0 !important;
}

.dark-mode .form-group input:focus,
.dark-mode .form-group textarea:focus {
    border-color: #3b82f6 !important;
}

.dark-mode .theme-toggle:hover {
    background-color: #475569 !important;
}

.dark-mode .footer {
    background-color: #0f172a !important;
    color: #e2e8f0 !important;
}

.dark-mode .profile-picture {
    border-color: #475569 !important;
}

/* this part is for responsive design */

/* tablet view */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-placeholder,
    .profile-picture {
        width: 250px;
        height: 250px;
        font-size: 6rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
}

/* mobile view */
@media (max-width: 480px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 200px;
        text-align: center;
    }
    
    .profile-placeholder,
    .profile-picture {
        width: 200px;
        height: 200px;
        font-size: 4rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .project-card {
        margin: 0 10px;
    }
    
    .dark-mode .nav-menu {
        background-color: #334155;
    }
}

/* very small devices (maybe like an iphone mini) */
@media (max-width: 320px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .profile-placeholder,
    .profile-picture {
        width: 150px;
        height: 150px;
        font-size: 3rem;
    }
    
    .container {
        padding: 0 10px;
    }
}

/* ================================================
   SMOOTH SCROLL & SECTION TRANSITIONS
   (Apple/Airbnb-style animations)
   ================================================ */

/* Section fade-in animation */
section {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInSection 0.8s ease-out forwards;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* Smooth scroll anchor transitions */
a[href^="#"] {
    scroll-behavior: smooth;
}

/* Section heading animations */
h1, h2 {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Parallax effect for hero section */
.hero {
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(37, 99, 235, 0.05));
    pointer-events: none;
    animation: gradientShift 15s ease infinite;
}

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

/* Staggered fade-in for multiple items */
.stagger-fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.stagger-fade-in:nth-child(1) { animation-delay: 0.1s; }
.stagger-fade-in:nth-child(2) { animation-delay: 0.2s; }
.stagger-fade-in:nth-child(3) { animation-delay: 0.3s; }
.stagger-fade-in:nth-child(4) { animation-delay: 0.4s; }
.stagger-fade-in:nth-child(5) { animation-delay: 0.5s; }
.stagger-fade-in:nth-child(6) { animation-delay: 0.6s; }

/* Smooth hover scale for interactive elements */
button, a, .project-card {
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

button:hover, a:hover {
    transform: translateY(-2px);
}

/* Scroll-triggered animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}