:root {
    --bg: #ffffff;
    --bg-soft: #f8fafc;
    --text: #0f172a;
    --text-muted: #64748b;
    --primary: #2563eb;
    --primary-soft: #dbeafe;
    --primary-hover: #1d4ed8;
    --accent: #3b82f6;
    --border: #e2e8f0;
    --container-width: 1200px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
nav {
    height: 72px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
}

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

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2.5rem;
}

.nav-links li a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.btn-nav {
    background-color: var(--text);
    color: white !important;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    transition: transform 0.2s ease, opacity 0.2s ease !important;
}

.btn-nav:hover {
    transform: translateY(-1px);
    opacity: 0.9;
}

/* Hero Section */
.hero {
    padding: 10rem 0 8rem;
    text-align: center;
    background: radial-gradient(circle at top, #eff6ff 0%, #ffffff 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background-color: var(--primary-soft);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.04em;
    color: var(--text);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
}

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

.btn-outline {
    background-color: white;
    color: var(--text);
    padding: 1rem 2rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.btn-outline:hover {
    background-color: var(--bg-soft);
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 8rem 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    padding: 3rem 2rem;
    background-color: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

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

.icon-box {
    width: 56px;
    height: 56px;
    background-color: var(--primary-soft);
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.card:hover .icon-box {
    background-color: var(--primary);
    color: white;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* How it works Section */
.how-it-works {
    padding: 8rem 0;
    background-color: var(--bg-soft);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 4rem;
}

.step {
    display: flex;
    gap: 1.5rem;
}

.step-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-soft);
    -webkit-text-stroke: 1px var(--primary);
    flex-shrink: 0;
    line-height: 1;
}

.step-text h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-text p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* About Section */
.about {
    padding: 8rem 0;
}

.about-card {
    background-color: var(--text);
    color: white;
    padding: 5rem 3rem;
    border-radius: 24px;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
}

.about-card h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.about-card p {
    font-size: 1.2rem;
    color: #94a3b8;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.6;
}

/* Footer */
footer {
    padding: 5rem 0 3rem;
    border-top: 1px solid var(--border);
    background-color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand .logo {
    margin-bottom: 1.5rem;
}

.footer-brand p {
    color: var(--text-muted);
    max-width: 300px;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

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

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links ul li a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    padding-top: 3rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    .nav-links {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}