:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-muted: #64748b;
    --color-border: #e2e8f0;
    --color-accent: #6366f1;
    --color-accent-strong: #4f46e5;
    --color-accent-soft: #eef2ff;
    --color-footer-bg: #0f172a;
    --color-footer-text: #cbd5e1;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
    --content-width: 1000px;
    --prose-width: 720px;
    --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

main {
    flex: 1;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-accent-strong);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 14px 24px;
}

.wordmark {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.wordmark:hover {
    text-decoration: none;
    color: var(--color-accent-strong);
}

.site-nav {
    display: flex;
    gap: 8px;
}

.site-nav a {
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    transition: color 150ms, background-color 150ms;
}

.site-nav a:hover {
    color: var(--color-accent-strong);
    background-color: var(--color-accent-soft);
    text-decoration: none;
}

/* Hero */

.hero {
    padding: 80px 0 64px;
    text-align: center;
    background: linear-gradient(180deg, var(--color-accent-soft) 0%, var(--color-bg) 100%);
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin: 0 auto 16px;
    max-width: 18ch;
}

.hero .tagline {
    font-size: 1.15rem;
    color: var(--color-muted);
    max-width: 46ch;
    margin: 0 auto 32px;
}

.button {
    display: inline-block;
    background-color: var(--color-accent-strong);
    color: #ffffff;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-sm);
    transition: background-color 150ms, transform 150ms;
}

.button:hover {
    background-color: var(--color-accent);
    text-decoration: none;
    transform: translateY(-1px);
}

.hero-image {
    margin: 56px auto 0;
    max-width: 820px;
    padding: 0 24px;
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* Sections */

section[id] {
    scroll-margin-top: 80px;
}

.section {
    padding: 64px 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0 0 8px;
}

.section-lead {
    color: var(--color-muted);
    margin: 0 0 40px;
    max-width: 60ch;
}

/* Product cards */

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.product-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 150ms, transform 150ms;
}

.product-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.product-icon {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.product-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0;
}

.product-card p {
    color: var(--color-muted);
    margin: 0;
    flex: 1;
}

.store-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.store-link {
    display: inline-block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-accent-strong);
    background-color: var(--color-accent-soft);
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    transition: background-color 150ms, color 150ms;
}

.store-link:hover {
    background-color: var(--color-accent-strong);
    color: #ffffff;
    text-decoration: none;
}

.store-soon {
    font-size: 0.9rem;
    color: var(--color-muted);
    padding: 8px 4px;
}

/* About */

.about-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

.about-card p {
    color: var(--color-muted);
    max-width: 65ch;
    margin: 0 0 1em;
}

.about-card p:last-child {
    margin-bottom: 0;
}

/* Prose (legal pages, 404) */

.prose {
    max-width: var(--prose-width);
    margin: 0 auto;
    padding: 56px 24px 72px;
}

.prose h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin: 0 0 8px;
}

.prose .page-meta {
    color: var(--color-muted);
    font-size: 0.9rem;
    margin: 0 0 40px;
}

.prose h2 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 2em 0 0.6em;
}

.prose p,
.prose ul {
    color: #334155;
    margin: 0 0 1em;
}

.prose li {
    margin-bottom: 0.4em;
}

/* 404 */

.error-page {
    text-align: center;
    padding: 96px 24px;
}

.error-page .error-code {
    font-size: 5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--color-accent-strong);
    margin: 0;
    line-height: 1;
}

.error-page h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 16px 0 8px;
}

.error-page p {
    color: var(--color-muted);
    margin: 0 0 32px;
}

/* Footer */

.site-footer {
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    margin-top: 64px;
}

.footer-inner {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 40px 24px;
    text-align: center;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 24px;
    margin-bottom: 16px;
}

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

.footer-nav a:hover {
    color: #ffffff;
}

.copyright {
    font-size: 0.85rem;
    color: #64748b;
    margin: 0;
}

/* Responsive */

@media (max-width: 600px) {
    .hero {
        padding: 56px 0 48px;
    }

    .section {
        padding: 48px 0;
    }

    .about-card {
        padding: 28px;
    }
}