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

:root {
    --primary-color: #2d7d32;
    --secondary-color: #81c784;
    --tertiary-color: #a5d6a7;
    --accent-color: #ff7043;
    --dark-text: #1b2b1b;
    --medium-text: #4a6741;
    --light-text: #7a8471;
    --bg-light: #f8fdf8;
    --bg-white: #ffffff;
    --border-color: #e8f5e8;
    --shadow-light: 0 4px 20px rgba(45, 125, 50, 0.08);
    --shadow-medium: 0 8px 30px rgba(45, 125, 50, 0.12);
    --shadow-heavy: 0 15px 50px rgba(45, 125, 50, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--dark-text);
    background: var(--bg-light);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; font-weight: 700; }
h2 { font-size: 2.5rem; font-weight: 600; }
h3 { font-size: 1.75rem; font-weight: 500; }
h4 { font-size: 1.375rem; font-weight: 500; }

p { margin-bottom: 1rem; color: var(--medium-text); }

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 1.75rem;
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--medium-text);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.cta-nav {
    background: var(--primary-color) !important;
    color: white !important;
    padding: 0.75rem 1.5rem !important;
    border-radius: 50px !important;
    transition: all 0.3s ease !important;
}

.cta-nav:hover {
    background: #1b5e20 !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, 
        var(--bg-light) 0%, 
        rgba(245, 255, 245, 1) 50%, 
        rgba(232, 245, 232, 1) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(129, 199, 132, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(165, 214, 167, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

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

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

.hero-text h1 {
    margin-bottom: 1.5rem;
    color: var(--dark-text);
}

.hero-text .accent {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: var(--medium-text);
    line-height: 1.7;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Playfair Display', serif;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--medium-text);
    font-weight: 500;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    background: #1b5e20;
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

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

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

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.concept-preview {
    position: relative;
}

.device-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #f0f0f0, #ffffff);
    border-radius: 30px;
    padding: 20px;
    box-shadow: var(--shadow-heavy);
    position: relative;
    overflow: hidden;
}

.device-mockup::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: #ddd;
    border-radius: 2px;
}

.screen {
    background: white;
    border-radius: 20px;
    height: 100%;
    padding: 20px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.1);
}

.app-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.app-header i {
    color: var(--secondary-color);
    font-size: 1.5rem;
}

.app-header span {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    color: var(--primary-color);
}

.booking-card {
    background: linear-gradient(135deg, var(--bg-light), white);
    padding: 1.5rem;
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.booking-card h4 {
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.booking-card p {
    color: var(--medium-text);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.rating {
    color: #ffa000;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    color: var(--dark-text);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--medium-text);
    max-width: 600px;
    margin: 0 auto;
}

/* Concept Section */
.concept-section {
    background: white;
}

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

.concept-card {
    background: var(--bg-light);
    padding: 3rem 2rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.concept-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(129, 199, 132, 0.1), transparent);
    transition: left 0.6s ease;
}

.concept-card:hover::before {
    left: 100%;
}

.concept-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--secondary-color);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    position: relative;
    z-index: 2;
}

.icon-wrapper.primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.icon-wrapper.secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--tertiary-color));
}

.icon-wrapper.tertiary {
    background: linear-gradient(135deg, var(--accent-color), #ff8a65);
}

.icon-wrapper i {
    color: white;
    font-size: 2rem;
}

.concept-card h3 {
    color: var(--dark-text);
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.concept-card p {
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 2;
}

.concept-card ul {
    list-style: none;
    position: relative;
    z-index: 2;
}

.concept-card li {
    padding: 0.5rem 0;
    color: var(--medium-text);
    position: relative;
    padding-left: 1.5rem;
}

.concept-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Market Section */
.market-section {
    background: linear-gradient(135deg, var(--bg-light) 0%, white 100%);
}

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

.market-intro {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: var(--medium-text);
}

.market-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

.market-stat {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.market-stat h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.market-stat p {
    font-size: 0.875rem;
    color: var(--medium-text);
    margin: 0;
}

.market-insights h3 {
    color: var(--dark-text);
    margin-bottom: 1rem;
}

.market-insights ul {
    list-style: none;
}

.market-insights li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--medium-text);
}

.market-insights li:last-child {
    border-bottom: none;
}

.market-insights strong {
    color: var(--primary-color);
}

/* Chart Visualization */
.chart-container {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.chart-container h4 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-text);
}

.growth-chart {
    display: flex;
    align-items: end;
    justify-content: space-around;
    height: 200px;
    margin-bottom: 1rem;
}

.chart-bar {
    background: linear-gradient(to top, var(--primary-color), var(--secondary-color));
    width: 60px;
    border-radius: 8px 8px 0 0;
    position: relative;
    transition: all 0.3s ease;
    cursor: pointer;
}

.chart-bar:hover {
    filter: brightness(1.1);
    transform: scale(1.05);
}

.bar-value {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-weight: 700;
    color: var(--primary-color);
    font-size: 0.875rem;
    white-space: nowrap;
}

.bar-year {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.875rem;
    color: var(--medium-text);
}

.competitive-advantage {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.competitive-advantage h4 {
    margin-bottom: 1.5rem;
    color: var(--dark-text);
}

.advantage-points {
    space-y: 1rem;
}

.advantage {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: var(--medium-text);
}

.advantage i {
    color: var(--primary-color);
    font-size: 1.125rem;
}

/* Platform Section */
.platform-section {
    background: white;
}

.feature-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 1rem 2rem;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--medium-text);
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

.feature-list {
    space-y: 2rem;
}

.feature-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-medium);
    border-color: var(--secondary-color);
}

.feature-item i {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.feature-item h4 {
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--medium-text);
    margin: 0;
}

/* Feature Visuals */
.feature-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.dashboard-preview, .mobile-preview, .guest-interface {
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.dashboard-preview {
    width: 250px;
    padding: 1.5rem;
}

.dashboard-header {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.dash-stat {
    text-align: center;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 10px;
}

.dash-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.dash-label {
    font-size: 0.75rem;
    color: var(--medium-text);
}

.mobile-preview {
    width: 200px;
    height: 400px;
    background: #333;
    border-radius: 25px;
    padding: 20px;
}

.mobile-screen {
    background: white;
    height: 100%;
    border-radius: 15px;
    padding: 1rem;
}

.mobile-header {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-text);
}

.booking-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 10px;
}

.booking-time {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 0.875rem;
}

.booking-details {
    display: flex;
    flex-direction: column;
}

.booking-details span:first-child {
    font-weight: 600;
    color: var(--dark-text);
    font-size: 0.875rem;
}

.booking-details span:last-child {
    font-size: 0.75rem;
    color: var(--medium-text);
}

.guest-interface {
    width: 250px;
    padding: 1.5rem;
}

.interface-header {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 1rem;
}

.service-card {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.service-type {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.service-provider {
    font-size: 0.875rem;
    color: var(--medium-text);
    margin-bottom: 0.5rem;
}

.service-price {
    font-weight: 700;
    color: var(--primary-color);
}

/* Opportunity Section */
.opportunity-section {
    background: var(--bg-light);
}

.opportunity-header {
    text-align: center;
    margin-bottom: 4rem;
}

.opportunity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.opportunity-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    text-align: center;
}

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

.opportunity-card.featured {
    border: 2px solid var(--primary-color);
    position: relative;
}

.opportunity-card.featured::before {
    content: 'Recommended';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.card-icon i {
    color: white;
    font-size: 2rem;
}

.funding-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-family: 'Playfair Display', serif;
}

.funding-use {
    list-style: none;
    text-align: left;
    margin-top: 1.5rem;
}

.funding-use li {
    padding: 0.5rem 0;
    color: var(--medium-text);
    position: relative;
    padding-left: 1.5rem;
}

.funding-use li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Founder Section */
.founder-section {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.founder-info {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.founder-avatar {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.founder-avatar i {
    color: white;
    font-size: 2.5rem;
}

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

.founder-bio {
    margin-bottom: 1.5rem;
}

.founder-credentials {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.founder-credentials span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--medium-text);
}

.founder-credentials i {
    color: var(--primary-color);
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, var(--primary-color), #1b5e20);
    color: white;
}

.contact-header {
    text-align: center;
    margin-bottom: 4rem;
}

.contact-header h2,
.contact-header p {
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
}

.contact-info .contact-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 2rem;
}

.contact-info .contact-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--tertiary-color);
}

.contact-info .contact-card a {
    color: var(--tertiary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

.investment-highlights h3 {
    color: white;
    margin-bottom: 1.5rem;
}

.investment-highlights ul {
    list-style: none;
}

.investment-highlights li {
    padding: 0.75rem 0;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    padding-left: 1.5rem;
}

.investment-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--tertiary-color);
    font-weight: 700;
}

/* Contact Form */
.contact-form {
    background: rgba(255, 255, 255, 0.1);
    padding: 3rem;
    border-radius: 25px;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-form h3 {
    color: white;
    margin-bottom: 2rem;
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--tertiary-color);
    background: rgba(255, 255, 255, 0.15);
}

/* Footer */
footer {
    background: var(--dark-text);
    color: white;
    padding: 3rem 0;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 600;
}

.footer-brand i {
    color: var(--secondary-color);
    font-size: 1.75rem;
}

.footer-text p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-content .container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .market-content,
    .feature-showcase,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .concept-grid,
    .opportunity-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .founder-info {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    h1 { font-size: 2rem; }
    
    .concept-card,
    .opportunity-card,
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .device-mockup {
        width: 250px;
        height: 500px;
    }
}