:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);
    --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    touch-action: manipulation;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--dark);
}

.btn-outline:hover {
    background: var(--dark);
    color: var(--white);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
    min-height: 48px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    min-height: 44px;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 16px 0;
    padding-top: calc(16px + var(--safe-area-top));
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    text-decoration: none;
}

.logo i {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--dark);
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-nav.active {
    opacity: 1;
}

.mobile-nav-content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: var(--white);
    padding: 24px;
    padding-top: calc(24px + var(--safe-area-top));
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav.active .mobile-nav-content {
    transform: translateX(0);
}

.mobile-nav-close {
    align-self: flex-end;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--gray);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 16px;
}

.mobile-nav-links a {
    padding: 12px 16px;
    border-radius: var(--radius);
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: background 0.2s ease;
}

.mobile-nav-links a:hover {
    background: var(--light);
}

/* Hero */
.hero {
    padding: 160px 24px 100px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
}

.card-float {
    position: absolute;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 14px;
    animation: float 6s ease-in-out infinite;
}

.card-float i {
    font-size: 32px;
    color: var(--primary);
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 20%;
    right: 5%;
    animation-delay: 1.5s;
}

.card-3 {
    bottom: 20%;
    left: 5%;
    animation-delay: 3s;
}

.card-4 {
    bottom: 10%;
    right: 15%;
    animation-delay: 4.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Sections */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.feature-icon i {
    font-size: 24px;
    color: var(--white);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--gray);
    font-size: 15px;
}

/* How It Works */
.steps {
    display: flex;
    flex-direction: column;
    gap: 48px;
    max-width: 600px;
    margin: 0 auto;
}

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

.step-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--gray);
    font-size: 16px;
}

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

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.testimonial-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.testimonial-stars i {
    color: var(--accent);
    fill: var(--accent);
}

.testimonial-text {
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 24px;
    line-height: 1.7;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 16px;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    font-size: 15px;
}

.author-role {
    font-size: 13px;
    color: var(--gray);
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

.pricing-card-popular:hover {
    transform: scale(1.05) translateY(-4px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: var(--white);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pricing-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.pricing-price {
    margin-bottom: 32px;
}

.pricing-price .amount {
    font-size: 42px;
    font-weight: 800;
}

.pricing-price .period {
    font-size: 16px;
    color: var(--gray);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
}

.pricing-features li i {
    color: var(--primary);
    flex-shrink: 0;
}

/* CTA */
.cta-box {
    background: var(--gradient);
    border-radius: var(--radius-xl);
    padding: 80px 60px;
    text-align: center;
    color: var(--white);
}

.cta-box h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-box p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-form {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto;
}

.cta-form input {
    flex: 1;
    padding: 16px 24px;
    border-radius: var(--radius);
    border: none;
    font-size: 16px;
    font-family: inherit;
    outline: none;
    min-height: 48px;
}

.cta-form .btn-primary {
    background: var(--dark);
    box-shadow: none;
}

.cta-form .btn-primary:hover {
    background: var(--dark-light);
}

/* Contact */
.contact {
    background: var(--light);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.contact-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.contact-icon i {
    font-size: 24px;
    color: var(--white);
}

.contact-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-value {
    font-size: 16px;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.contact-value:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 80px 0 40px;
    padding-bottom: calc(40px + var(--safe-area-bottom));
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--gray-light);
    margin-top: 16px;
    font-size: 15px;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    color: var(--gray-light);
    text-decoration: none;
    font-size: 15px;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-light);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 140px;
    }

    .hero-subtitle {
        margin: 0 auto 40px;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

    .features-grid,
    .testimonials-grid,
    .pricing-grid,
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .pricing-card-popular:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .mobile-nav {
        display: block;
        visibility: hidden;
    }

    .mobile-nav.active {
        visibility: visible;
    }

    .hero {
        padding: 120px 20px 60px;
    }

    .hero-title {
        font-size: 32px;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 32px;
    }

    .hero-actions {
        flex-direction: column;
        gap: 12px;
        margin-bottom: 40px;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: 20px;
        align-items: center;
    }

    .stat-number {
        font-size: 28px;
    }

    section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .features-grid,
    .testimonials-grid,
    .pricing-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card,
    .testimonial-card,
    .pricing-card,
    .contact-card {
        padding: 24px;
    }

    .steps {
        gap: 32px;
    }

    .step {
        flex-direction: column;
        gap: 12px;
    }

    .step-number {
        font-size: 36px;
    }

    .cta-box {
        padding: 40px 24px;
    }

    .cta-box h2 {
        font-size: 24px;
    }

    .cta-box p {
        font-size: 16px;
        margin-bottom: 32px;
    }

    .cta-form {
        flex-direction: column;
    }

    .cta-form .btn {
        width: 100%;
    }

    .footer {
        padding: 60px 0 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-brand p {
        max-width: 100%;
    }
}

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

    .hero {
        padding: 100px 16px 40px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 12px;
    }

    .section-title {
        font-size: 24px;
    }

    .feature-icon,
    .contact-icon {
        width: 48px;
        height: 48px;
    }

    .feature-icon i,
    .contact-icon i {
        font-size: 20px;
    }

    .pricing-price .amount {
        font-size: 32px;
    }

    .author-avatar {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
}