/* ============================================
   ImpressionAssist Website Styles
   Brand Colors: Teal (#00BCD4), Dark Gray (#555)
   ============================================ */

/* CSS Variables */
:root {
    --primary-color: #00BCD4;
    --primary-dark: #0097A7;
    --primary-light: #B2EBF2;
    --text-dark: #333;
    --text-gray: #555;
    --text-light: #777;
    --white: #ffffff;
    --bg-light: #f8fafa;
    --bg-gray: #f5f5f5;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-gray);
    background-color: var(--white);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-dark);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--primary-dark);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-large {
    padding: 16px 36px;
    font-size: 1.125rem;
}

.btn-nav {
    padding: 10px 24px;
    font-size: 0.9375rem;
}

.btn svg {
    width: 20px;
    height: 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-dark);
}

.logo:hover {
    color: var(--text-dark);
}

.logo-img {
    height: 45px;
    width: auto;
}

.logo-text {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-gray);
    font-weight: 500;
    font-size: 0.9375rem;
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-dark);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--text-dark);
    transition: var(--transition);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    bottom: -7px;
}

/* Hero Section */
.hero {
    padding: 100px 0 80px;
    background: linear-gradient(135deg, var(--white) 0%, var(--bg-light) 100%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.7;
}

.hero-stats {
    background: rgba(0, 188, 212, 0.08);
    border-left: 4px solid var(--primary-color);
    padding: 20px 24px;
    border-radius: 0 12px 12px 0;
    margin-bottom: 32px;
}

.hero-stat-line {
    font-size: 1.125rem;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.hero-stat-line:last-of-type {
    margin-bottom: 12px;
}

.stat-highlight {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.hero-stat-tagline {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0;
}

.hero-stat-line sup {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-left: 1px;
}

.hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.comparison-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 24px;
    max-width: 480px;
}

.comparison-before,
.comparison-after {
    padding: 16px;
    border-radius: 12px;
}

.comparison-before {
    background-color: #fef3f2;
    border-left: 4px solid #f87171;
}

.comparison-after {
    background-color: #ecfdf5;
    border-left: 4px solid var(--primary-color);
}

.comparison-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.comparison-before .comparison-label {
    color: #dc2626;
}

.comparison-after .comparison-label {
    color: var(--primary-dark);
}

.comparison-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.comparison-content p:last-child {
    margin-bottom: 0;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.comparison-arrow {
    display: flex;
    justify-content: center;
    padding: 12px 0;
    color: var(--primary-color);
}

.comparison-arrow svg {
    width: 32px;
    height: 32px;
}

/* Hero Citations */
.hero-citations {
    text-align: left;
    padding-top: 40px;
    grid-column: 1 / -1;
}

.hero-citations p {
    font-size: 0.75rem;
    color: #666;
    margin-bottom: 4px;
    line-height: 1.5;
}

.hero-citations p:last-child {
    margin-bottom: 0;
}

.hero-citations sup {
    font-size: 0.625rem;
    margin-right: 2px;
}

/* Comparison Tabs */
.comparison-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    width: 100%;
    max-width: 480px;
}

.tab-btn {
    flex: 1;
    padding: 12px 16px;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-gray);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.tab-content {
    display: none;
}

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

/* Action Items List */
.action-items-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.action-items-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 188, 212, 0.2);
    font-size: 0.9375rem;
    line-height: 1.5;
}

.action-items-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.action-items-list strong {
    color: var(--primary-dark);
}

/* Screenshot Placeholder */
.screenshot-placeholder {
    margin-top: 24px;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px 24px;
    text-align: center;
    background: var(--bg-light);
}

.placeholder-content svg {
    width: 48px;
    height: 48px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.placeholder-content p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.9375rem;
}

/* Section Styles */
.section-title {
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.125rem;
    margin-bottom: 48px;
}

/* Features Section */
.features {
    padding: 100px 0;
    background-color: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary-color);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-description {
    color: var(--text-light);
    font-size: 0.9375rem;
    margin-bottom: 0;
    line-height: 1.7;
}

/* Research Section */
.research {
    padding: 100px 0;
    background-color: var(--bg-light);
}

/* Problem Sections */
.problem-section {
    margin-bottom: 48px;
}

.problem-title {
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.problem-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 24px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 0;
}

.stats-grid-3 {
    grid-template-columns: repeat(3, 1fr);
    max-width: 900px;
    margin: 0 auto;
}

.stat-card {
    background: var(--white);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border-top: 4px solid var(--primary-color);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-card-highlight {
    border-top: 4px solid #f87171;
    background: linear-gradient(to bottom, #fef3f2 0%, var(--white) 100%);
}

.stat-card-highlight .stat-number {
    color: #dc2626;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 12px;
}

.stat-text {
    font-size: 0.9375rem;
    color: var(--text-gray);
    line-height: 1.5;
}

.research-quote {
    background: var(--white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.quote-icon {
    position: absolute;
    top: 24px;
    left: 40px;
    color: var(--primary-light);
    opacity: 0.6;
}

.quote-icon svg {
    width: 40px;
    height: 40px;
}

.research-quote blockquote {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin: 0 0 20px 0;
    padding-left: 48px;
    font-style: italic;
}

.research-quote cite {
    display: block;
    padding-left: 48px;
    font-size: 0.9375rem;
    color: var(--text-light);
    font-style: normal;
}

.research-quote cite em {
    font-style: italic;
}

/* Pricing Section */
.pricing {
    padding: 100px 0;
    background-color: var(--white);
}

.pricing-cta {
    text-align: center;
    margin-top: 32px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
    transition: var(--transition);
    position: relative;
}

.pricing-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}

.pricing-card.featured:hover {
    transform: scale(1.02) translateY(-4px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--white);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.pricing-name {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

.price-period {
    font-size: 0.9375rem;
    color: var(--text-light);
}

.pricing-features {
    margin-bottom: 32px;
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.9375rem;
    color: var(--text-gray);
}

.pricing-features svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke: var(--primary-color);
    margin-top: 2px;
}

.pricing-tagline {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 24px;
    font-style: italic;
}

.price-original {
    font-size: 1.25rem;
    color: var(--text-light);
    text-decoration: line-through;
    margin-right: 8px;
}

.pricing-card .btn {
    width: 100%;
}

.pricing-note {
    text-align: center;
    margin-top: 40px;
    font-size: 1rem;
    color: var(--text-light);
    font-style: italic;
}

/* Security & Compliance Section */
.security {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.security-table-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.security-table {
    width: 100%;
    border-collapse: collapse;
}

.security-table tr {
    border-bottom: 1px solid var(--border-color);
}

.security-table tr:last-child {
    border-bottom: none;
}

.security-table td {
    padding: 16px 24px;
    font-size: 0.9375rem;
}

.security-label {
    font-weight: 600;
    color: var(--text-dark);
    width: 40%;
    background-color: var(--bg-light);
}

.security-value {
    color: var(--text-gray);
    width: 60%;
}

@media (max-width: 768px) {
    .security-table td {
        padding: 12px 16px;
        font-size: 0.875rem;
    }

    .security-label {
        width: 45%;
    }

    .security-value {
        width: 55%;
    }
}

@media (max-width: 480px) {
    .security-table tr {
        display: flex;
        flex-direction: column;
        border-bottom: 1px solid var(--border-color);
    }

    .security-table td {
        width: 100%;
        padding: 12px 16px;
    }

    .security-label {
        padding-bottom: 4px;
        background-color: var(--white);
    }

    .security-value {
        padding-top: 4px;
        padding-bottom: 16px;
    }
}

/* About Section */
.about {
    padding: 100px 0;
    background-color: var(--white);
}

.about .section-title {
    margin-bottom: 16px;
}

/* About Content */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content .about-text {
    font-size: 1.125rem;
    line-height: 1.9;
    margin-bottom: 32px;
}

.about-content .about-company {
    display: inline-block;
    text-align: left;
    margin-top: 16px;
}

/* Founder Story */
.founder-story {
    text-align: left;
}

.founder-letter {
    background: var(--white);
    border-radius: 16px;
    padding: 48px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    margin-bottom: 32px;
}

.founder-letter p {
    font-size: 1.125rem;
    line-height: 1.9;
    color: var(--text-gray);
    margin-bottom: 24px;
}

.founder-letter p:last-of-type {
    margin-bottom: 32px;
}

.founder-letter strong {
    color: var(--text-dark);
}

.founder-signature {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.signature-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px !important;
}

.signature-title {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0 !important;
}

/* Founder Section */
.founder-section {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 48px;
    align-items: center;
    background: var(--white);
    border-radius: 16px;
    padding: 48px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 48px;
}

.founder-photo {
    flex-shrink: 0;
}

.founder-photo img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--white);
    box-shadow: var(--shadow-lg);
}

.founder-name {
    font-size: 1.5rem;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.founder-title {
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 16px;
}

.founder-text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 0;
}

/* About Bottom Section */
.about-bottom {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: start;
}

.about-mission {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.about-text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-gray);
}

.about-company {
    margin-top: 24px;
    padding: 24px;
    background: var(--bg-light);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.about-company strong {
    display: block;
    font-size: 1.125rem;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.about-company p {
    margin-bottom: 0;
    color: var(--text-light);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.stat {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--white);
    border-radius: 12px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.stat:hover {
    background: var(--primary-light);
    transform: translateX(4px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--primary-color);
}

.stat-label {
    font-weight: 500;
    color: var(--text-dark);
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.download-section,
.contact-form-section {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.download-section h3,
.contact-form-section h3 {
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.download-section p {
    color: var(--text-light);
    margin-bottom: 24px;
}

.download-btn {
    margin-bottom: 16px;
}

.download-note {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0;
}

.contact-form {
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-dark);
    font-size: 0.9375rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

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

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

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

.contact-info {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 0;
}

.contact-info svg {
    width: 20px;
    height: 20px;
    stroke: var(--primary-color);
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: var(--white);
    padding: 32px 0;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.footer-logo {
    height: 35px;
    width: auto;
}

.footer-copyright {
    margin-bottom: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

/* Success/Error Messages */
.form-success {
    background-color: #ecfdf5;
    border: 1px solid var(--primary-color);
    color: var(--primary-dark);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: none;
}

.form-success.show {
    display: block;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-stats {
        text-align: left;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-card.featured {
        transform: none;
        order: -1;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }

    .about-container {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .founder-section {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 32px;
    }

    .founder-photo {
        margin: 0 auto;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid-3 {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .founder-letter {
        padding: 32px;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

    .nav-toggle {
        display: block;
        z-index: 1001;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.125rem;
    }

    .nav-toggle.active .hamburger {
        background: transparent;
    }

    .nav-toggle.active .hamburger::before {
        transform: rotate(45deg);
        top: 0;
    }

    .nav-toggle.active .hamburger::after {
        transform: rotate(-45deg);
        bottom: 0;
    }

    .hero {
        padding: 120px 0 60px;
    }

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

    .hero-subtitle {
        font-size: 1.0625rem;
    }

    .hero-stats {
        padding: 16px 20px;
    }

    .hero-stat-line {
        font-size: 1rem;
    }

    .stat-highlight {
        font-size: 1.25rem;
    }

    .comparison-tabs {
        flex-direction: column;
    }

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

    .feature-card {
        text-align: center;
    }

    .feature-icon {
        margin: 0 auto 20px;
    }

    .problem-title {
        font-size: 1.25rem;
    }

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

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

    .research-quote {
        padding: 24px;
    }

    .quote-icon {
        position: static;
        margin-bottom: 16px;
    }

    .research-quote blockquote,
    .research-quote cite {
        padding-left: 0;
    }

    .founder-section {
        padding: 24px;
        gap: 24px;
    }

    .founder-photo img {
        width: 150px;
        height: 150px;
    }

    .founder-name {
        font-size: 1.25rem;
    }

    .founder-letter {
        padding: 24px;
    }

    .founder-letter p {
        font-size: 1rem;
    }

    .about-mission {
        padding: 24px;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .download-section,
    .contact-form-section {
        padding: 24px;
    }

    .screenshot-placeholder {
        padding: 24px 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .btn-large {
        padding: 14px 28px;
        font-size: 1rem;
    }

    .comparison-card {
        padding: 16px;
    }

    .pricing-card {
        padding: 24px;
    }

    .price-amount {
        font-size: 2rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus states for accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .contact-form,
    .btn {
        display: none !important;
    }

    body {
        color: #000;
    }

    .hero {
        padding-top: 0;
    }
}