/* Base Styles & Variables */
:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #f1f5f9;
    --secondary-hover: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --bg-main: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e2e8f0;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 3px 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 25px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

p {
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background-color: var(--secondary);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background-color: #eff6ff;
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.1rem;
    border-radius: var(--radius-md);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
}

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

.nav-links a:not(.btn) {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:not(.btn):hover {
    color: var(--primary);
}

/* Hero Section */
.hero {
    padding: 160px 24px 100px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-title {
    font-size: 3.5rem;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}

/* Mockup */
.hero-image {
    perspective: 1000px;
}

.app-mockup {
    width: 100%;
    height: 400px;
    background-color: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s ease;
}

.app-mockup:hover {
    transform: rotateY(0) rotateX(0);
}

.mockup-header {
    height: 60px;
    background-color: white;
    border-bottom: 1px solid var(--border);
}

.mockup-body {
    display: flex;
    flex: 1;
}

.mockup-sidebar {
    width: 80px;
    background-color: #1e293b;
    border-right: 1px solid var(--border);
}

.mockup-content {
    flex: 1;
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.mockup-card {
    background-color: white;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    height: 120px;
}

/* Features Section */
.features {
    background-color: var(--bg-alt);
    padding: 100px 0;
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    margin-bottom: 64px;
}

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

.feature-card {
    background-color: white;
    padding: 40px 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: left;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 24px;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.25rem;
}

/* Pricing Section */
.pricing {
    padding: 100px 0;
    text-align: center;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 64px;
}

.pricing-card {
    background-color: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    position: relative;
    transition: box-shadow 0.2s;
}

.pricing-card:hover {
    box-shadow: var(--shadow-md);
}

.pricing-card.popular {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary);
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 20px;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-main);
}

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

.pricing-desc {
    margin-bottom: 32px;
    min-height: 48px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 40px;
    width: 100%;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-main);
    display: flex;
    align-items: center;
}

.pricing-features li::before {
    content: "✓";
    color: var(--primary);
    font-weight: bold;
    margin-right: 12px;
}

.pricing-card .btn {
    width: 100%;
    margin-top: auto;
}

/* Footer */
.footer {
    background-color: var(--bg-alt);
    padding: 64px 0 24px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand p {
    margin-top: 16px;
    max-width: 250px;
}

.footer-links h4 {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.footer-links a {
    display: block;
    text-decoration: none;
    color: var(--text-muted);
    margin-bottom: 8px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .features-grid, .pricing-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .footer-content {
        grid-template-columns: 1fr;
    }
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    .hero-cta .btn {
        width: 100%;
    }
}