/* Root Variables */
:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1E40AF;
    --color-text-dark: #1E3A8A;
    --color-text-light: #6B7280;
    --color-bg-light: #F9FAFB;
    --color-bg-card: #F3F4F6;
    --color-border: #E5E7EB;
    --color-white: #FFFFFF;
    --color-accent-light: #E8E4FF;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text-dark);
    background-color: var(--color-white);
    line-height: 1.6;
    font-size: 16px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-primary-dark);
}

button {
    font-family: var(--font-sans);
    cursor: pointer;
    border: none;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

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

/* Header / Navigation */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

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

.nav a {
    color: var(--color-text-dark);
    font-size: 0.95rem;
    font-weight: 500;
}

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

/* Buttons */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    font-size: 0.95rem;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-lg);
    font-weight: 600;
    font-size: 0.95rem;
}

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-bg-light) 50%, var(--color-accent-light) 100%);
    z-index: -1;
}

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

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.6;
}

.hero-note {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-md);
}

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.section-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.feature-card {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    text-align: center;
}

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

.feature-icon {
    margin-bottom: var(--spacing-lg);
    display: inline-block;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Pricing Section */
.pricing {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-white);
}

.pricing-note {
    color: var(--color-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background-color: var(--color-bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card.featured {
    background-color: var(--color-white);
    border: 2px solid var(--color-primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

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

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-md);
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.price span {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.plan-desc {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
    font-size: 0.95rem;
    min-height: 40px;
}

/* Testimonials Section */
.testimonials {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

.quote {
    color: var(--color-text-dark);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    flex: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-weight: 600;
    color: var(--color-text-dark);
    font-size: 0.95rem;
}

.author-role {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1D4ED8 100%);
    color: var(--color-white);
}

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

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
}

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

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

.cta-note {
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
    opacity: 0.9;
}

/* Footer */
.footer {
    background-color: #0F172A;
    color: #D1D5DB;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: var(--color-white);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: #D1D5DB;
    font-size: 0.9rem;
}

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

.social-icons {
    display: flex;
    gap: var(--spacing-md);
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    transition: all 0.3s ease;
}

.social-icon:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: #9CA3AF;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .features,
    .pricing,
    .testimonials,
    .cta-section {
        padding: var(--spacing-2xl) 0;
    }

    .cta-content h2 {
        font-size: 2rem;
    }

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

    .features-grid,
    .pricing-grid,
    .testimonials-grid {
        gap: var(--spacing-lg);
    }

    .feature-card,
    .pricing-card,
    .testimonial {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero h1 {
        font-size: 1.75rem;
    }

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

    .section-header h2 {
        font-size: 1.5rem;
    }

    .btn-large {
        width: 100%;
    }

    .nav {
        gap: var(--spacing-md);
    }

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

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

.feature-card,
.testimonial,
.pricing-card {
    animation: fadeIn 0.6s ease-out;
    animation-timeline: view();
    animation-range: entry 0% cover 30%;
}