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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
}

/* Utility Classes */
.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
}

.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-narrow {
    max-width: 896px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e5e7eb;
    z-index: 1000;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(to bottom right, #3b82f6, #9333ea);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon span {
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: -0.05em;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.nav-links {
    display: none;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: #4b5563;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: #111827;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: #2563eb;
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.btn-hero {
    background-color: white;
    color: #9333ea;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    gap: 0.5rem;
}

.btn-hero:hover {
    background-color: #f9fafb;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.btn-outline {
    background-color: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
}

.btn-outline:hover {
    background-color: #2563eb;
    color: white;
}

.btn-cta {
    background-color: white;
    color: #9333ea;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
    gap: 0.5rem;
}

.btn-cta:hover {
    background-color: #f9fafb;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* Hero Section */
.hero-section {
    padding: 8rem 1rem 5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
}

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

@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-content {
    color: white;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 3.75rem;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 4.5rem;
    }
}

.hero-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .hero-description {
        font-size: 1.5rem;
    }
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .hero-buttons {
        flex-direction: row;
    }
}

.hero-features {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Chat Mockup */
.hero-demo {
    position: relative;
}

.chat-mockup {
    background-color: white;
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: 1.5rem;
    max-width: 28rem;
    margin: 0 auto;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
}

.chat-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(to bottom right, #3b82f6, #9333ea);
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.chat-name {
    font-weight: 600;
    color: #111827;
}

.chat-status {
    font-size: 0.875rem;
    color: #6b7280;
}

.chat-messages {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-message {
    padding: 0.75rem 1rem;
    max-width: 85%;
}

.chat-message-sent {
    background-color: #3b82f6;
    color: white;
    border-radius: 1rem;
    border-top-right-radius: 0.25rem;
    margin-left: auto;
}

.chat-message-received {
    background-color: #f3f4f6;
    color: #111827;
    border-radius: 1rem;
    border-top-left-radius: 0.25rem;
}

/* Section Styles */
.section {
    padding: 5rem 1rem;
}

.section-white {
    background-color: white;
}

.section-gray {
    background-color: #f9fafb;
}

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

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1rem;
}

@media (min-width: 640px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-description {
    font-size: 1.25rem;
    color: #4b5563;
    max-width: 42rem;
    margin: 0 auto;
}

/* Problem/Solution Section */
.problem-solution-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .problem-solution-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.problem-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #dc2626;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.solution-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #16a34a;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.problem-card,
.solution-card {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background-color: white;
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.problem-card:hover,
.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.card-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-description {
    color: #6b7280;
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .steps-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.step-card {
    background-color: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-top: 4px solid;
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.step-blue {
    border-color: #3b82f6;
}

.step-purple {
    border-color: #9333ea;
}

.step-indigo {
    border-color: #6366f1;
}

.step-green {
    border-color: #10b981;
}

.step-number {
    font-size: 3rem;
    font-weight: 700;
    opacity: 0.2;
    margin-bottom: 1rem;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.step-description {
    color: #6b7280;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    background-color: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.feature-icon-blue {
    background-color: #dbeafe;
    color: #2563eb;
}

.feature-icon-purple {
    background-color: #f3e8ff;
    color: #9333ea;
}

.feature-icon-indigo {
    background-color: #e0e7ff;
    color: #6366f1;
}

.feature-icon-green {
    background-color: #d1fae5;
    color: #10b981;
}

.feature-icon-yellow {
    background-color: #fef3c7;
    color: #f59e0b;
}

.feature-icon-red {
    background-color: #fee2e2;
    color: #ef4444;
}

.feature-icon-pink {
    background-color: #fce7f3;
    color: #ec4899;
}

.feature-icon-orange {
    background-color: #ffedd5;
    color: #f97316;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.feature-description {
    color: #6b7280;
    line-height: 1.6;
}

/* Tabs */
.tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    background-color: #f3f4f6;
    color: #374151;
}

.tab-btn:hover {
    background-color: #e5e7eb;
}

.tab-btn.active {
    background-color: #2563eb;
    color: white;
}

.tab-content {
    max-width: 48rem;
    margin: 0 auto;
}

.tab-panel {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tab-panel.active {
    display: block;
    opacity: 1;
}

.examples-container {
    background-color: #f9fafb;
    border-radius: 1rem;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.example-message {
    background-color: white;
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

/* Pricing */
.pricing-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 80rem;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .pricing-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

.pricing-card {
    background-color: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.pricing-period {
    color: #6b7280;
    margin-bottom: 2rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    color: #4b5563;
}

.pricing-features li svg {
    color: #10b981;
    flex-shrink: 0;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    border: 1px solid #e5e7eb;
    border-radius: 0.75rem;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: white;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s;
}

.faq-question:hover {
    background-color: #f9fafb;
}

.faq-icon {
    color: #9ca3af;
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 1.5rem;
    color: #4b5563;
}

.faq-item.active .faq-answer {
    max-height: 400px;
    padding: 1.25rem 1.5rem;
}

/* CTA Section */
.cta-section {
    padding: 5rem 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
}

.cta-content {
    max-width: 64rem;
    margin: 0 auto;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .cta-title {
        font-size: 3rem;
    }
}

.cta-description {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
    .cta-description {
        font-size: 1.5rem;
    }
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

@media (min-width: 640px) {
    .cta-buttons {
        flex-direction: row;
    }
}

.cta-features {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Footer */
.footer {
    background-color: #111827;
    color: #9ca3af;
    padding: 4rem 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-logo .logo-text {
    color: white;
}

.footer-description {
    font-size: 0.875rem;
    color: #6b7280;
}

.footer-title {
    font-weight: 600;
    color: white;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    font-size: 0.875rem;
    color: #6b7280;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .section {
        padding: 3rem 1rem;
    }

    .hero-section {
        padding: 6rem 1rem 3rem;
    }
}