/* Base Styles and Variables */
:root {
    --primary-color: #00A884; /* WhatsApp green */
    --primary-dark: #075E54; /* Darker WhatsApp green */
    --primary-light: #25D366; /* Lighter WhatsApp green */
    --secondary-color: #4A6FA5; /* Blue for reading features */
    --accent-color: #9C27B0; /* Purple for audio features */
    --warning-color: #FF6D00; /* Orange for summaries */
    --info-color: #0097A7; /* Teal for other features */
    --text-color: #1E2832;
    --text-light: #5B6671;
    --background-light: #F8F9FA;
    --background-white: #FFFFFF;
    --shadow-sm: 0 2px 8px 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);
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 24px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-xxxl: 64px;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* OpenDyslexic Font */
@font-face {
    font-family: 'OpenDyslexic';
    src: url('assets/fonts/OpenDyslexic-Regular.otf') format('opentype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'OpenDyslexic';
    src: url('assets/fonts/OpenDyslexic-Bold.otf') format('opentype');
    font-weight: bold;
    font-style: normal;
    font-display: swap;
}

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

html {
    scroll-behavior: smooth;
}

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

img {
    max-width: 100%;
    height: auto;
}

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

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

button {
    cursor: pointer;
    border: none;
    outline: none;
    background: none;
    font-family: var(--font-family);
}

ul {
    list-style: none;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.highlight {
    color: var(--primary-color);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-lg);
}

/* App Screenshot */
.app-screenshot {
    max-width: 280px !important;
    height: auto !important;
    border-radius: 40px !important;
    box-shadow: 0 10px 30px rgba(0, 168, 132, 0.2) !important;
    display: block !important;
    margin: 0 auto !important;
}

/* Dyslexic Font Toggle Styles */
.accessibility-toggle {
    display: flex;
    align-items: center;
    margin-left: 15px;
    cursor: pointer;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    margin-right: 8px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: #00A884;
}

input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 14px;
    white-space: nowrap;
}

/* Dyslexic Font Styling */
html[data-font="dyslexic"] body,
html[data-font="dyslexic"] h1,
html[data-font="dyslexic"] h2, 
html[data-font="dyslexic"] h3,
html[data-font="dyslexic"] h4,
html[data-font="dyslexic"] p,
html[data-font="dyslexic"] a,
html[data-font="dyslexic"] div,
html[data-font="dyslexic"] span,
html[data-font="dyslexic"] button,
html[data-font="dyslexic"] input,
html[data-font="dyslexic"] .nav-links,
html[data-font="dyslexic"] .logo,
html[data-font="dyslexic"] .feature-card,
html[data-font="dyslexic"] .footer-links,
html[data-font="dyslexic"] .hero-content {
    font-family: 'OpenDyslexic', 'Comic Sans MS', sans-serif !important;
    letter-spacing: 0.5px;
    word-spacing: 2px;
    line-height: 1.5;
}

/* Visual indicator for active dyslexic font */
html[data-font="dyslexic"] .toggle-label {
    font-weight: bold;
    color: #00A884;
}

/* Feature Icon Containers */
.icon-container {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
}

/* App Features Visual (in download section) */
.app-features-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 0 auto;
    max-width: 320px;
}

.feature-icon-large {
    width: 120px;
    height: 120px;
    border-radius: 20px;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: #00A884;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

/* Buttons */
.primary-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 14px 28px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

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

.secondary-button {
    display: inline-block;
    background-color: transparent;
    color: var(--primary-color);
    padding: 12px 26px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    border: 2px solid var(--primary-color);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    text-align: center;
}

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

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: background-color var(--transition-medium), padding var(--transition-medium);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
}

.nav-scrolled {
    padding: 12px 0;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    color: var(--text-color);
    font-weight: 700;
    font-size: 1.5rem;
}

.logo img {
    height: 36px;
    margin-right: var(--spacing-sm);
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.cta-button {
    background-color: var(--primary-color);
    color: white !important;
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast);
}

.cta-button:hover {
    background-color: var(--primary-dark);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
}

.mobile-menu-toggle span {
    height: 3px;
    width: 100%;
    background-color: var(--text-color);
    border-radius: 10px;
    transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-xxxl);
    overflow: hidden;
    position: relative;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero h1 {
    margin-bottom: var(--spacing-lg);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.hero-image {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-width: 100%;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1;
}

.hero-pattern {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(var(--primary-light) 2px, transparent 2px);
    background-size: 30px 30px;
    z-index: 0;
    opacity: 0.3;
    top: 10%;
    right: -10%;
    border-radius: var(--border-radius-lg);
    transform: rotate(10deg);
}

/* Section Styling */
section {
    padding: var(--spacing-xxxl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xxl);
}

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

/* Features Section */
.features-section {
    background-color: var(--background-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background-color: var(--background-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    margin-bottom: var(--spacing-lg);
}

.reading-icon {
    background-color: rgba(74, 111, 165, 0.1);
}

.reading-icon img {
    color: var(--secondary-color);
}

.audio-icon {
    background-color: rgba(156, 39, 176, 0.1);
}

.summary-icon {
    background-color: rgba(255, 109, 0, 0.1);
}

.integration-icon {
    background-color: rgba(0, 168, 132, 0.1);
}

.feature-card h3 {
    margin-bottom: var(--spacing-md);
}

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

/* How It Works Section */
.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.step-number {
    background-color: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step h3 {
    margin-bottom: var(--spacing-sm);
}

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

.demo-video {
    margin-top: var(--spacing-xxl);
}

.video-container {
    position: relative;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-container img {
    width: 100%;
    display: block;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background-color: rgba(0, 0, 0, 0.6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.play-button:hover {
    background-color: var(--primary-color);
    transform: translate(-50%, -50%) scale(1.1);
}

/* Security Section */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.security-card {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    background-color: var(--background-white);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

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

.security-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--spacing-md);
}

.security-card h3 {
    margin-bottom: var(--spacing-md);
}

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

.security-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    background-color: var(--background-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.security-message-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
}

.security-message p {
    margin-bottom: 0;
    font-weight: 500;
    color: var(--text-color);
}

/* Testimonials Section */
.testimonials-section {
    background-color: var(--background-light);
}

.testimonials-slider {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    overflow-x: hidden;
}

.testimonial {
    flex: 0 0 calc(33.333% - var(--spacing-xl) * 2/3);
    background-color: var(--background-white);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.testimonial-content {
    margin-bottom: var(--spacing-lg);
}

.testimonial-content p {
    font-style: italic;
    color: var(--text-color);
    margin-bottom: 0;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.testimonial-author img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-author h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.testimonial-author p {
    margin-bottom: 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-light);
    opacity: 0.3;
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.dot.active {
    opacity: 1;
    background-color: var(--primary-color);
    transform: scale(1.2);
}

/* Download Section */
.download-section {
    position: relative;
    overflow: hidden;
}

.download-section .container {
    display: flex;
    align-items: center;
    gap: var(--spacing-xxl);
}

.download-content {
    flex: 1;
}

.download-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.app-store-button img,
.play-store-button img {
    height: 48px;
}

.download-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.download-image img {
    max-width: 100%;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
}

/* Footer */
footer {
    background-color: var(--primary-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
}

.footer-brand {
    flex: 2;
}

.footer-logo {
    display: flex;
    align-items: center;
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 32px;
    margin-right: var(--spacing-sm);
}

.footer-brand p {
    margin-bottom: var(--spacing-lg);
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    background-color: rgba(255, 255, 255, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.social-links a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.social-links img {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

.footer-links {
    flex: 3;
    display: flex;
    justify-content: space-between;
}

.link-group h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.link-group ul li {
    margin-bottom: var(--spacing-md);
}

.link-group ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.link-group ul li a:hover {
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    .hero-container {
        flex-direction: column;
    }
    
    .hero-content {
        text-align: center;
        margin-bottom: var(--spacing-xxl);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .download-section .container {
        flex-direction: column;
    }
    
    .download-content {
        text-align: center;
        margin-bottom: var(--spacing-xxl);
    }
    
    .download-buttons {
        justify-content: center;
    }
    
    .testimonials-slider {
        flex-wrap: wrap;
    }
    
    .testimonial {
        flex: 0 0 calc(50% - var(--spacing-xl) / 2);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .footer-grid {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-xl);
    }
    
    .link-group {
        flex: 0 0 calc(50% - var(--spacing-xl) / 2);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .testimonial {
        flex: 0 0 100%;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .primary-button, .secondary-button {
        width: 100%;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .link-group {
        flex: 0 0 100%;
    }
}

/* Beta Signup Form */
.signup-form {
    margin-top: var(--spacing-lg);
    max-width: 500px;
}

.signup-form form {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.signup-form input,
.signup-form select {
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    border: 1px solid #ddd;
    font-family: var(--font-family);
    font-size: 1rem;
    flex: 1 0 200px;
}

.signup-form button {
    padding: 12px 24px;
    min-width: 120px;
}

.form-note {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: var(--spacing-md);
}

@media (max-width: 768px) {
    .signup-form button {
        flex: 1 0 100%;
    }
}