:root {
    --primary-gradient: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --primary-color: #8B5CF6;
    --secondary-color: #10B981;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --background: #FFFFFF;
    --background-secondary: #F9FAFB;
    --background-accent: #F3F4F6;
    --border: #E5E7EB;
    --border-light: #F3F4F6;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

/* Differentiate Monthly plan CTA slightly (outline style) */
.pricing-card:not(.featured) .pricing-cta .btn-secondary {
    background: var(--background);
    color: var(--text-primary);
    border-color: var(--border);
}

.pricing-card:not(.featured) .pricing-cta .btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.025em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.025em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.025em;
}

p {
    font-size: 1.125rem;
    line-height: 1.7;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow);
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--background);
    color: var(--text-primary);
    border: 2px solid var(--border);
    font-weight: 600;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.125rem;
    font-weight: 600;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width 0.2s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.header-cta .btn-primary {
    padding: 12px 24px;
    font-size: 0.9rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 112px 0 88px;
    background: #FFFFFF;
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 80px;
    align-items: center;
    width: 100%;
}

.hero-text {
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.75rem, 5.5vw, 4.25rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    margin-bottom: 40px;
    color: var(--text-secondary);
    max-width: 520px;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 48px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    color: var(--text-primary);
}

.feature-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.hero-cta {
    margin-bottom: 40px;
}

.cta-note {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 12px;
    margin-bottom: 0 !important;
}

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

.phone-mockup {
    width: clamp(240px, 70vw, 320px);
    aspect-ratio: 1 / 2; /* keeps 320x640 proportion */
    background: linear-gradient(135deg, #1F2937 0%, #374151 100%);
    border-radius: 36px;
    padding: 16px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000000;
    border-radius: 28px;
    overflow: hidden;
    position: relative;
}

.chat-preview {
    padding: 24px;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
    justify-content: center;
}

.message {
    max-width: 85%;
    padding: 16px 20px;
    border-radius: 20px;
    font-size: 14px;
    line-height: 1.4;
}

.message.received {
    background: #E5E7EB;
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 8px;
}

.message.sent {
    background: var(--primary-color);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 8px;
}

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

.section-header {
    text-align: center;
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0 !important;
}

/* Problem Solution Section */
.problem-solution {
    background: var(--background-secondary);
}

.problem-solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

@media (max-width: 768px) {
    .problem-solution-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

.problem h3,
.solution h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.problem p,
.solution p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 0 !important;
}

/* Benefits Section */
.benefits {
    background: var(--background);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 56px;
}

.benefit-item {
    padding: 40px 32px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.2s ease;
}

.benefit-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.benefit-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.benefit-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.benefit-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0 !important;
}

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

/* How It Works Section */
.how-it-works {
    background: var(--background-accent);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-bottom: 56px;
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 0 !important;
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, #FEF7FF 0%, #F3E8FF 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.contact-info p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px !important;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-method h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.contact-method p {
    color: var(--text-secondary);
    margin-bottom: 0 !important;
}

/* Form Styles */
.contact-form form {
    background: var(--background);
    padding: 48px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.2s ease;
    background: var(--background);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

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

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 80px;
    margin-bottom: 60px;
}

.footer-brand h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
    margin-bottom: 0 !important;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
}

.footer-column h4 {
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column ul {
    list-style: none;
    margin: 0;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s ease;
    font-size: 0.95rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Mobile navigation */
    .mobile-menu-toggle { display: flex; }
    .nav-list {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 0 24px;
        flex-direction: column;
        gap: 12px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        z-index: 999;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transform: translateY(-6px);
        transition: max-height 0.25s ease, opacity 0.2s ease, transform 0.2s ease;
        pointer-events: none;
    }
    .nav-list.active {
        max-height: 320px;
        opacity: 1;
        transform: translateY(0);
        padding: 16px 24px;
        pointer-events: auto;
    }

    /* Hero layout stacks */
    .hero { padding: 96px 0 64px; min-height: auto; }
    .hero-content { grid-template-columns: 1fr; gap: 40px; }
    .hero-text { max-width: 100%; }
    .hero-visual { margin-top: -8px; }
    .phone-mockup { margin: 0 auto; }
}

@media (max-width: 480px) {
    .hero { padding: 88px 0 56px; }
    .hero-content { gap: 32px; }
}

@media (max-width: 360px) {
    .hero-content { gap: 24px; }
}

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

    .hero {
        padding: 100px 0 60px;
    }

    section {
        padding: 60px 0;
    }

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

    .problem-card, .solution-card {
        padding: 24px;
    }

    .contact-form form {
        padding: 24px;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for better accessibility */
.btn:focus,
.nav-link:focus,
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: 2px solid #8B5CF6;
    outline-offset: 2px;
}

/* Pricing Section */
.pricing {
    background: var(--background);
    padding: 80px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
}

.pricing-card {
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 520px;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-gradient);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-header {
    margin-bottom: 32px;
    flex-shrink: 0;
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 16px;
}

.pricing-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.pricing-price .amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.pricing-price .period {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-secondary);
    align-self: flex-end;
    margin-bottom: 8px;
}

.pricing-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.pricing-savings {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 16px;
}

.savings-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.savings-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.pricing-features {
    margin-bottom: auto;
    flex-grow: 1;
}

.pricing-features .feature {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    text-align: left;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.pricing-features .feature svg {
    color: var(--secondary-color);
    flex-shrink: 0;
}

.pricing-cta {
    margin-top: 40px;
    padding-top: 20px;
}

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

.pricing-footer {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.pricing-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.pricing-guarantee svg {
    color: var(--secondary-color);
    flex-shrink: 0;
}

.pricing-guarantee strong {
    color: var(--text-primary);
    font-weight: 600;
}

.pricing-support {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.pricing-support a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.pricing-support a:hover {
    text-decoration: underline;
}

/* Pricing responsive */
@media (max-width: 1024px) and (min-width: 769px) {
    .pricing-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

@media (max-width: 480px) {
    .pricing {
        padding: 80px 0;
    }

    .pricing-card {
        padding: 32px 24px;
    }

}

/* Testimonials */
.testimonials {
    background: var(--background-secondary);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.testimonial-item {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.testimonial-quote {
    color: var(--text-primary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.testimonial-author {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* FAQ */
.faq {
    background: var(--background);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    border-top: 1px solid var(--border);
}

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

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
}

.faq-question span { flex: 1; text-align: left; }
.faq-question .chevron { color: var(--text-secondary); transition: transform 0.2s ease; }
.faq-item.open .chevron { transform: rotate(180deg); }

.faq-answer {
    color: var(--text-secondary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.faq-item.open .faq-answer { max-height: 240px; }

.faq-answer p {
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 16px 0;
}

/* Final CTA */
.cta-final {
    background: var(--background-accent);
}

.cta-final-content {
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
}

.cta-final-content p {
    margin-bottom: 24px;
}