:root {
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-primary: #06b6d4;
    /* Cyan 500 */
    --color-primary-hover: #0891b2;
    /* Cyan 600 */
    --color-accent: #3b82f6;
    /* Blue 500 */
    --color-border: #334155;

    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --container-width: 1200px;
    --border-radius: 8px;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: white;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Helper Classes */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--color-primary);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--color-primary);
    color: rgb(15, 23, 42);
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 1.125rem;
}

.btn:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

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

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

/* Header */
header {
    padding: var(--spacing-md) 0;
    position: absolute;
    width: 100%;
    top: 0;
    z-index: 10;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    letter-spacing: -0.03em;
}

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

.nav-links a {
    color: var(--color-text-muted);
    font-weight: 500;
}

.nav-links a:hover {
    color: white;
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image: linear-gradient(rgba(15, 23, 42, 0.5), var(--color-bg)), url('images/hero_bg.webp');
    background-size: cover;
    background-position: center;
    padding-top: var(--spacing-xl);
}

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

.hero p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features/Problem-Solution Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    object-fit: contain;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: white;
}

/* Target Audience */
.audience-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.audience-item {
    position: relative;
    padding: 0;
    border-radius: 12px;
    overflow: hidden;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    transition: transform 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.audience-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.audience-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: brightness(0.4) saturate(0.8);
    transition: filter 0.3s ease, transform 0.5s ease;
    z-index: 1;
}

.audience-item:hover .audience-bg {
    filter: brightness(0.6) saturate(1.1);
    transform: scale(1.05);
}

.audience-content {
    position: relative;
    z-index: 2;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.95), transparent);
    padding: 2rem;
    width: 100%;
}

.audience-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.audience-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* Footer */
footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-xl);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text-muted);
}

/* Legal Page Styles */
.legal-content {
    padding-top: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: var(--spacing-xl);
}

.legal-content h1 {
    margin-bottom: var(--spacing-md);
}

.legal-content h2 {
    margin-top: var(--spacing-lg);
    font-size: 1.75rem;
    color: white;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
}

.legal-content h3 {
    margin-top: var(--spacing-md);
    font-size: 1.25rem;
    color: var(--color-text);
}

.legal-content p,
.legal-content ul {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

.legal-content ul {
    list-style: disc;
    padding-left: 1.5rem;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
        /* simple hide for v1 mobile nav */
    }

    .hero {
        padding-top: var(--spacing-lg);
        min-height: 70vh;
    }
}