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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: #1F2937;
    background-color: #FFFFFF;
}

/* CSS Variables - Brand Colors */
:root {
    --primary-green: #4ADE80;
    --primary-navy: #1B365D;
    --accent-blue: #0080FF;
    --accent-orange: #FF6B35;
    --gray-dark: #1F2937;
    --gray-medium: #6B7280;
    --gray-light: #E5E7EB;
    --white: #FFFFFF;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 80px 0;
    --element-border-radius: 12px;
    
    /* Typography */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }

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

/* Layout Components */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: var(--section-padding);
}

.section-title {
    color: var(--gray-dark);
    margin-bottom: 3rem;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: var(--element-border-radius);
    font-family: inherit;
    font-weight: var(--font-medium);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: #22C55E;
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.125rem;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-light);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo-full {
    height: 40px;
    width: auto;
    filter: brightness(1.05) saturate(1.1);
}

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

.nav-link {
    color: var(--gray-dark);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-green);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--gray-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 140px 0 120px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.4) 0%, rgba(248, 250, 252, 0.6) 100%),
                url('https://images.unsplash.com/photo-1497366811353-6870744d04b2?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(74, 222, 128, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    padding: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-bold);
    color: var(--gray-dark);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-medium);
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* Conversation Preview */
.conversation-preview {
    background: var(--white);
    border-radius: var(--element-border-radius);
    padding: 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.conversation-bubble {
    padding: 12px 16px;
    border-radius: 18px;
    margin: 8px 0;
    max-width: 80%;
    font-size: 0.9rem;
    line-height: 1.4;
}

.conversation-bubble.user {
    background-color: var(--primary-green);
    color: var(--white);
    margin-left: auto;
    text-align: right;
}

.conversation-bubble.ai {
    background-color: #f1f5f9;
    color: var(--gray-dark);
    margin-right: auto;
}

.hero-cta {
    margin-top: 2rem;
}

.hero-cta-note {
    font-size: 0.875rem;
    color: var(--gray-medium);
    margin-top: 0.5rem;
    text-align: center;
}

/* Hero Logo */
.hero-logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 2rem;
}

.hero-logo-main {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: logoFloat 6s ease-in-out infinite;
}

.logo-swirl-background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background-image: url('../images/swirl.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.6;
    z-index: 0;
    animation: swirlRotate 20s linear infinite;
}

.hero-logo-svg {
    max-width: 350px;
    height: auto;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.15));
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes swirlRotate {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Pronunciation Button */
.pronunciation-button {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 2px solid var(--primary-green);
    border-radius: 30px;
    padding: 14px 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(74, 222, 128, 0.15);
    z-index: 10;
}

.pronunciation-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(74, 222, 128, 0.25);
    border-color: var(--primary-navy);
    background: rgba(255, 255, 255, 1);
}

.pronunciation-button:active {
    transform: translateY(-1px);
}

.pronunciation-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sound-icon {
    font-size: 1.25rem;
    animation: pulse 2s infinite;
}

.pronunciation-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.pronunciation-question {
    font-size: 0.8rem;
    color: var(--gray-medium);
    font-weight: var(--font-medium);
}

.pronunciation-name {
    font-size: 1rem;
    color: var(--primary-navy);
    font-weight: var(--font-semibold);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

/* Pronunciation Tooltip */
.pronunciation-tooltip {
    position: absolute;
    top: -70px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-navy);
    color: var(--white);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
    white-space: nowrap;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.3s ease;
}

.pronunciation-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--primary-navy);
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Problem/Solution Section */
.problem-solution {
    padding: var(--section-padding);
    background-color: var(--white);
}

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

.problem-points {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.problem-point {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.problem-icon {
    font-size: 1.5rem;
    padding: 8px;
    background-color: #fef2f2;
    border-radius: 8px;
    flex-shrink: 0;
}

.problem-text h3 {
    color: var(--gray-dark);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.solution-content {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 2rem;
    border-radius: var(--element-border-radius);
}

.solution-headline {
    color: var(--primary-navy);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.solution-benefits {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.benefit {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: var(--font-medium);
    color: var(--gray-dark);
}

.benefit-icon {
    font-size: 1.125rem;
}

/* Features Section */
.features {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--element-border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-title {
    color: var(--gray-dark);
    margin-bottom: 1rem;
}

.feature-description {
    margin-bottom: 1.5rem;
}

.feature-examples {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.example {
    background-color: #f8fafc;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.875rem;
    font-style: italic;
    color: var(--gray-medium);
}

/* Use Cases Section */
.use-cases {
    padding: var(--section-padding);
    background-color: var(--white);
}

.use-cases-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.tab-button {
    padding: 12px 24px;
    border: 2px solid var(--gray-light);
    background: var(--white);
    color: var(--gray-medium);
    border-radius: var(--element-border-radius);
    cursor: pointer;
    font-weight: var(--font-medium);
    transition: all 0.3s ease;
}

.tab-button.active,
.tab-button:hover {
    border-color: var(--primary-green);
    color: var(--primary-green);
    background-color: rgba(74, 222, 128, 0.05);
}

.tab-content {
    display: none;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--element-border-radius);
}

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

.use-case-content h3 {
    color: var(--primary-navy);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.use-case-examples {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--element-border-radius);
}

.example-scenario {
    color: var(--gray-dark);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.example-query {
    background-color: var(--primary-green);
    color: var(--white);
    padding: 12px 16px;
    border-radius: 18px;
    margin: 1rem 0;
    font-style: italic;
    display: inline-block;
}

.example-response {
    background-color: #f1f5f9;
    padding: 12px 16px;
    border-radius: 18px;
    margin: 1rem 0;
    line-height: 1.5;
}

/* How It Works Section */
.how-it-works {
    padding: var(--section-padding);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.how-it-works-steps {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    margin: 3rem 0;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
}

.step::after {
    content: '→';
    position: absolute;
    top: 30px;
    right: -1rem;
    font-size: 2rem;
    color: var(--primary-green);
}

.step:last-child::after {
    display: none;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: var(--primary-green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: var(--font-bold);
    margin: 0 auto 1rem;
}

.step-content h3 {
    color: var(--gray-dark);
    margin-bottom: 1rem;
}

.integration-info {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--element-border-radius);
    margin-top: 3rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.integration-info h3 {
    color: var(--primary-navy);
    text-align: center;
    margin-bottom: 1.5rem;
}

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

.integration-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.feature-check {
    color: var(--success);
    font-weight: var(--font-bold);
    font-size: 1.125rem;
}

/* FAQ Section */
.faq {
    padding: var(--section-padding);
    background-color: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--gray-light);
    margin-bottom: 1rem;
}

.faq-question {
    width: 100%;
    padding: 1.5rem 0;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.125rem;
    font-weight: var(--font-medium);
    color: var(--gray-dark);
}

.faq-toggle {
    font-size: 1.5rem;
    color: var(--primary-green);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding-bottom: 1.5rem;
}

/* Waitlist Section */
.waitlist {
    padding: var(--section-padding);
    background: linear-gradient(135deg, var(--primary-navy) 0%, #1e40af 100%);
    color: var(--white);
}

.waitlist-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.waitlist .section-title {
    color: var(--white);
}

.waitlist-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.waitlist-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--element-border-radius);
    text-align: left;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: var(--font-medium);
    color: var(--gray-dark);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-light);
    border-radius: var(--element-border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-green);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-privacy {
    font-size: 0.875rem;
    color: var(--gray-medium);
    text-align: center;
    margin-top: 1rem;
}

/* Footer */
.footer {
    background-color: var(--gray-dark);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo-icon {
    width: 28px;
    height: 28px;
}

.footer-logo-text {
    font-size: 1.5rem;
    font-weight: var(--font-bold);
    color: var(--primary-green);
}

.footer-tagline {
    color: var(--gray-light);
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-link {
    color: var(--gray-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--primary-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: var(--gray-light);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--element-border-radius);
    max-width: 400px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-content h3 {
    color: var(--primary-green);
    margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        background-attachment: scroll;
        padding: 120px 0 100px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
        margin: 0 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .how-it-works-steps {
        flex-direction: column;
        gap: 2rem;
    }
    
    .step::after {
        display: none;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .use-cases-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .tab-button {
        width: 200px;
    }
    
    .hero-logo-svg {
        max-width: 280px;
    }
    
    .logo-swirl-background {
        width: 320px;
        height: 320px;
    }
    
    .pronunciation-button {
        bottom: 1.5rem;
        right: 1.5rem;
        padding: 10px 16px;
    }
    
    .pronunciation-question {
        font-size: 0.75rem;
    }
    
    .pronunciation-name {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 120px 0 80px;
        background-attachment: scroll;
    }
    
    .hero-content {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-padding {
        padding: 60px 0;
    }
    
    .waitlist-form {
        padding: 1.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-logo-svg {
        max-width: 240px;
    }
    
    .logo-swirl-background {
        width: 280px;
        height: 280px;
    }
    
    .pronunciation-button {
        bottom: 1rem;
        right: 1rem;
        padding: 8px 14px;
    }
    
    .pronunciation-content {
        gap: 8px;
    }
    
    .sound-icon {
        font-size: 1rem;
    }
    
    .pronunciation-question {
        font-size: 0.7rem;
    }
    
    .pronunciation-name {
        font-size: 0.85rem;
    }
}