/* ===== CSS Variables for Theming ===== */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

/* Dark mode variables */
body.dark-mode {
    --text-color: #e0e0e0;
    --text-light: #b0b0b0;
    --bg-color: #1a1a2e;
    --card-bg: #16213e;
    --border-color: #2a2a3e;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.7);
}

/* ===== Reset and Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-gradient);
    min-height: 100vh;
    transition: var(--transition);
}

body.dark-mode {
    background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-color);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

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

/* ===== Utility Classes ===== */
.hidden {
    display: none !important;
}

/* ===== Navigation ===== */
header {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background: var(--bg-gradient);
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
    border-radius: 3px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.dark-mode-toggle {
    background: var(--bg-gradient);
    border: none;
    color: white;
    font-size: 1.2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

/* ===== Main Content ===== */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* ===== Hero Section ===== */
.hero {
    background: var(--card-bg);
    padding: 4rem 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out;
}

.hero h1 {
    color: var(--primary-color);
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.3rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* ===== Page Hero ===== */
.page-hero {
    background: var(--card-bg);
    padding: 3rem 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    text-align: center;
    margin-bottom: 3rem;
}

.page-hero h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
}

.page-hero p {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--bg-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-gradient);
    color: white;
    border-color: transparent;
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-block {
    width: 100%;
}

/* ===== Message ===== */
.message {
    margin-top: 1.5rem;
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: bold;
    min-height: 1.5rem;
}

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

/* ===== Features Section ===== */
.features {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 3rem;
}

.features h2 {
    color: var(--primary-color);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

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

.feature-card {
    padding: 2rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition);
    background: var(--card-bg);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta-section {
    background: var(--bg-gradient);
    padding: 4rem 2rem;
    border-radius: 15px;
    text-align: center;
    margin: 3rem 0;
    color: white;
}

.cta-content h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ===== Newsletter Form ===== */
.newsletter-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group-inline {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.form-group-inline input {
    flex: 1;
    min-width: 250px;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
}

.form-group-inline .btn {
    white-space: nowrap;
}

/* ===== Testimonials ===== */
.testimonials {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin: 3rem 0;
}

.testimonials h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 3rem;
}

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

.testimonial-card {
    padding: 2rem;
    background: var(--bg-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-sm);
}

.testimonial-text {
    margin-bottom: 1.5rem;
}

.testimonial-text p {
    font-style: italic;
    color: var(--text-light);
    line-height: 1.8;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--bg-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-info strong {
    display: block;
    color: var(--text-color);
}

.author-info span {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===== Pricing Section ===== */
.pricing {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin: 3rem 0;
}

.pricing h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 3rem;
}

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

.pricing-card {
    padding: 2.5rem 2rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    border-width: 3px;
}

.pricing-card .badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-gradient);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.pricing-card h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.price {
    margin: 1.5rem 0;
}

.price-amount {
    font-size: 3rem;
    font-weight: bold;
    color: var(--text-color);
}

.price-period {
    font-size: 1rem;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.pricing-features li {
    padding: 0.75rem 0;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

.pricing-features li:last-child {
    border-bottom: none;
}

/* ===== About Page Styles ===== */
.about-content {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 3rem;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.about-image .placeholder-image {
    background: var(--bg-gradient);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
    color: white;
}

.placeholder-image .placeholder-icon {
    font-size: 5rem;
    display: block;
    margin-bottom: 1rem;
}

.placeholder-image p {
    font-size: 1.5rem;
    font-weight: bold;
}

/* ===== Values Section ===== */
.values {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 3rem;
}

.values h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 3rem;
}

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

.value-card {
    text-align: center;
    padding: 2rem;
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.value-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--text-light);
}

/* ===== Team Section ===== */
.team {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin-bottom: 3rem;
}

.team h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 3rem;
}

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

.team-member {
    text-align: center;
    padding: 2rem;
    background: var(--bg-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-sm);
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--bg-gradient);
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.team-member h3 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.team-role {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.team-member p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== Stats Section ===== */
.stats {
    background: var(--bg-gradient);
    padding: 3rem;
    border-radius: 15px;
    margin: 3rem 0;
    color: white;
}

.stats h2 {
    color: white;
    text-align: center;
    margin-bottom: 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== Portfolio Styles ===== */
.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    background: var(--card-bg);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--bg-gradient);
    color: white;
    border-color: transparent;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.portfolio-item {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.portfolio-image .placeholder-image {
    background: var(--bg-gradient);
    padding: 4rem 2rem;
    text-align: center;
}

.portfolio-image .placeholder-icon {
    font-size: 4rem;
    color: white;
}

.portfolio-content {
    padding: 2rem;
}

.portfolio-content h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.portfolio-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.portfolio-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== Contact Styles ===== */
.contact-section {
    margin-bottom: 3rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.contact-info h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-info > p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.contact-methods {
    margin-bottom: 2rem;
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.contact-method:last-child {
    border-bottom: none;
}

.method-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.method-content h3 {
    color: var(--text-color);
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.method-content p,
.method-content a {
    color: var(--text-light);
    font-size: 0.95rem;
}

.office-hours {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.office-hours h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.office-hours p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

/* ===== Contact Form ===== */
.contact-form-container {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    max-width: 100%;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-color);
    color: var(--text-color);
    transition: var(--transition);
}

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

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.form-note {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 1rem;
    text-align: center;
}

/* ===== FAQ Section ===== */
.faq {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    margin: 3rem 0;
}

.faq h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 3rem;
}

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

.faq-item {
    padding: 2rem;
    background: var(--bg-color);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.faq-item h3 {
    color: var(--text-color);
    margin-bottom: 0.75rem;
}

.faq-item p {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Footer ===== */
footer {
    background: var(--card-bg);
    margin-top: 4rem;
    padding: 3rem 2rem 1rem;
    box-shadow: var(--shadow-sm);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

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

.social-links a {
    color: var(--text-light);
    transition: var(--transition);
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== Back to Top Button ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--bg-gradient);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ===== Responsive Design ===== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--card-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
        gap: 0;
    }

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

    .nav-link {
        display: block;
        width: 100%;
        padding: 1rem;
    }

    .nav-toggle {
        display: flex;
    }

    .dark-mode-toggle {
        margin-top: 1rem;
    }

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

    .hero h1 {
        font-size: 2rem;
    }

    .page-hero h1 {
        font-size: 2rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }

    main {
        padding: 1rem;
    }

    .hero,
    .features,
    .about-content,
    .values,
    .team,
    .contact-form-container,
    .contact-info {
        padding: 2rem 1.5rem;
    }

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

    .form-group-inline input,
    .form-group-inline .btn {
        width: 100%;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .feature-grid,
    .pricing-grid,
    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}