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

:root {
    /* Colors */
    --primary-color: #5B8DEE;
    --primary-dark: #4A7DD7;
    --secondary-color: #6C63FF;
    --text-dark: #1A1A2E;
    --text-gray: #6B7280;
    --text-light: #9CA3AF;
    --bg-light: #F8F9FE;
    --bg-white: #FFFFFF;
    --border-color: #E5E7EB;
    --success-color: #10B981;
    --warning-color: #F59E0B;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

body {
    font-family: var(--font-family);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
}

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

.btn-block {
    display: block;
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

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

.logo-icon {
    font-size: 1.75rem;
    margin-right: var(--spacing-xs);
}

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

.nav-link {
    color: var(--text-gray);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.hero-note {
    color: var(--success-color);
    font-weight: 500;
}

.hero-image {
    max-width: 600px;
    margin: 0 auto;
}

.phone-mockup {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
}

.chat-message {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    max-width: 80%;
    animation: fadeIn 0.5s ease;
}

.chat-message.bot {
    background: var(--bg-light);
    margin-right: auto;
}

.chat-message.user {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    margin-left: auto;
    text-align: right;
}

.chat-message p {
    margin: 0;
}

/* Problem Section */
.problem {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-2xl);
    color: var(--text-dark);
}

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

.problem-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: transform 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.problem-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.problem-card p {
    color: var(--text-gray);
}

/* How It Works */
.how-it-works {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    position: relative;
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

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

.step p {
    color: var(--text-gray);
}

/* Features */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.feature {
    padding: var(--spacing-lg);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.feature h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.feature p {
    color: var(--text-gray);
}

/* Pricing */
.pricing {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-light);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.pricing-card.featured {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.pricing-title {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
    font-size: 1.5rem;
}

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

.price-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-dark);
}

.price-currency {
    color: var(--text-gray);
    font-size: 1.25rem;
}

.savings {
    background: var(--success-color);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.875rem;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.pricing-features li {
    padding: var(--spacing-sm) 0;
    color: var(--text-gray);
    position: relative;
    padding-left: 25px;
}

.pricing-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.pricing-note {
    color: var(--text-gray);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

/* FAQ */
.faq {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

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

.faq-item {
    margin-bottom: var(--spacing-md);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(91, 141, 238, 0.1);
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-gray);
}

.faq-answer p {
    line-height: 1.7;
}

/* CTA Section */
.cta {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    text-align: center;
}

.cta-title {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
}

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

.cta .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

.footer-section h4 {
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-top: var(--spacing-sm);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
}

.disclaimer {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.95);
    max-width: 700px;
    margin: var(--spacing-md) auto 0;
    background: rgba(245, 158, 11, 0.15);
    border: 2px solid var(--warning-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    font-weight: 500;
    line-height: 1.6;
}

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }

    .nav.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translateY(8px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-8px);
    }

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

    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }

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

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

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .pricing-card.featured:hover {
        transform: translateY(-5px);
    }

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

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

    .pricing-cards {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .cta-subtitle {
        font-size: 1rem;
    }
}

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

    .hero {
        padding-top: calc(80px + var(--spacing-xl));
    }

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

    .chat-message {
        max-width: 100%;
        font-size: 0.875rem;
    }

    .phone-mockup {
        padding: var(--spacing-md);
    }
}