:root {
    --black: #000000;
    --white: #ffffff;
    --gray-50: #fbfbfd;
    --gray-100: #f5f5f7;
    --gray-200: #e8e8ed;
    --gray-500: #86868b;
    --gray-800: #1d1d1f;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--gray-800);
    background-color: var(--white);
    line-height: 1.5;
    font-size: 17px;
}

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.bg-light { background-color: var(--gray-50); }
.bg-black { background-color: var(--black); }
.text-white { color: var(--white); }
.text-center { text-align: center; }

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--black);
}

.bg-black h1, .bg-black h2, .bg-black h3, .bg-black h4 {
    color: var(--white);
}

.section-title {
    font-size: 40px;
    line-height: 1.1;
    margin-bottom: 40px;
    letter-spacing: -0.04em;
}

.subtitle {
    font-size: 21px;
    color: var(--gray-500);
    margin-top: -24px;
    margin-bottom: 48px;
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 980px; /* Pill shape */
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: #333333;
}

.btn-secondary {
    background-color: transparent;
    color: var(--black);
    border-color: var(--black);
}

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

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

.btn-white:hover {
    background-color: var(--gray-200);
}

.btn-outline {
    background-color: transparent;
    color: var(--black);
    border: 1px solid var(--gray-200);
}

.btn-outline:hover {
    border-color: var(--black);
}

.btn-outline-white {
    background-color: transparent;
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.3);
}

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

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 9999;
    padding: 14px 0;
}

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

.logo {
    font-size: 21px;
    font-weight: 600;
    color: var(--black);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    font-size: 14px;
    color: var(--gray-800);
    text-decoration: none;
    font-weight: 400;
    transition: color 0.2s;
    letter-spacing: -0.01em;
}

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

.nav-cta {
    color: var(--black) !important;
    font-weight: 500 !important;
}

/* Hero */
.hero {
    padding: 120px 0 80px;
}

.hero h1 {
    font-size: 64px;
    line-height: 1.05;
    letter-spacing: -0.05em;
    max-width: 800px;
    margin: 0 auto 20px;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto 32px;
    letter-spacing: -0.015em;
    font-weight: 400;
}

.hero-details {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 40px;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* Demos */
.demo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.demo-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.25, 0.1, 0.25, 1), box-shadow 0.4s;
    border: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
}

.demo-card:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.demo-image-wrapper {
    width: 100%;
    padding-top: 66%; /* 3:2 Aspect Ratio */
    position: relative;
    background-color: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.demo-image-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

.demo-content {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.demo-content h3 {
    font-size: 19px;
    margin: 0;
    font-weight: 600;
}

.demo-link {
    font-size: 14px;
    color: var(--black);
    text-decoration: none;
    font-weight: 500;
}

.demo-link:hover {
    text-decoration: underline;
}

/* Packages */
.package-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.package-card {
    background-color: var(--gray-50);
    border-radius: 24px;
    padding: 48px;
    text-align: left;
    transition: var(--transition);
}

.package-card:hover {
    background-color: var(--gray-100);
}

.package-label {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 600;
    margin-bottom: 12px;
}

.package-card h3 {
    font-size: 32px;
    margin-bottom: 8px;
}

.package-price {
    font-size: 21px;
    color: var(--gray-800);
    margin-bottom: 32px;
}

/* About */
.about-wrapper {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}

.about-label {
    font-size: 17px;
    color: var(--gray-500);
    margin-bottom: 32px;
}

.about-wrapper p {
    font-size: 21px;
    color: var(--gray-200);
    margin-bottom: 24px;
    line-height: 1.4;
    font-weight: 400;
}

.about-wrapper .btn {
    margin-top: 24px;
}

/* Flex Grid for Features */
.flex-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.grid-half h2 {
    font-size: 32px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.feature-icon {
    width: 48px;
    height: 48px;
    background-color: var(--black);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 19px;
    font-weight: 600;
    flex-shrink: 0;
}

.feature-icon i {
    width: 24px;
    height: 24px;
}

.feature-text h4 {
    font-size: 19px;
    margin-bottom: 8px;
}

.feature-text p {
    font-size: 15px;
    color: var(--gray-500);
}

/* Pricing Section */
.pricing-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.pricing-box {
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-color: var(--white);
}

.pricing-list {
    list-style: none;
    margin-bottom: 40px;
}

.pricing-list li {
    font-size: 15px;
    color: var(--gray-800);
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.pricing-list li i {
    width: 18px;
    height: 18px;
    color: var(--black);
    flex-shrink: 0;
    margin-top: 2px;
}

.price-action {
    border-top: 1px solid var(--gray-200);
    padding-top: 24px;
}

.price-val {
    font-size: 32px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.guarantee {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.6;
}

.guarantee strong {
    color: var(--black);
}

/* Get Started */
.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
}

.contact-buttons .btn i {
    margin-right: 8px;
    width: 18px;
}

.thank-you-title {
    font-size: 32px;
    margin-bottom: 16px;
}

.thank-you-text {
    font-size: 19px;
    color: var(--gray-200);
}

/* Footer */
footer {
    background-color: var(--gray-50);
    padding: 60px 0 30px;
    border-top: 1px solid var(--gray-200);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 16px;
}

.footer-col p {
    font-size: 12px;
    color: var(--gray-500);
    max-width: 250px;
}

.footer-col a {
    display: block;
    font-size: 12px;
    color: var(--gray-500);
    text-decoration: none;
    margin-bottom: 12px;
}

.footer-col a:hover {
    color: var(--black);
}

.footer-bottom {
    border-top: 1px solid var(--gray-200);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--gray-500);
}

/* Responsive */
@media (max-width: 900px) {
    .demo-grid, .package-grid, .flex-grid, .pricing-container, .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero h1 { font-size: 48px; }
    .hero-subtitle { font-size: 21px; }
}

@media (max-width: 600px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 40px; }
    .hero-actions { flex-direction: column; }
    .contact-buttons { flex-direction: column; }
    .section { padding: 60px 0; }
    .footer-bottom { flex-direction: column; gap: 12px; align-items: center; }
}