:root {
    --color-primary: #1e4b8e;
    --color-primary-dark: #16325c;
    --color-accent: #0d9488;
    --color-text: #1f2937;
    --color-muted: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f7fa;
    --color-border: #e5e7eb;
    --max-width: 1100px;
    --radius: 8px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(30, 75, 142, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.container.narrow {
    max-width: 760px;
}

/* ---------- Header ---------- */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-primary-dark);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.site-nav a {
    color: var(--color-text);
    text-decoration: none;
    margin-left: 28px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.15s ease;
}

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

/* ---------- Hero ---------- */
.hero {
    background: linear-gradient(180deg, #f5f7fa 0%, #ffffff 100%);
    padding: 100px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-muted);
    max-width: 720px;
    margin: 0 auto 32px;
}

.hero-coming-soon {
    display: inline-block;
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-primary);
    padding: 10px 20px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

/* ---------- Sections ---------- */
.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section h2 {
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    color: var(--color-primary-dark);
    text-align: center;
    margin-bottom: 48px;
    letter-spacing: -0.01em;
}

.section.narrow h2,
.section .container.narrow h2 {
    text-align: left;
}

.section p {
    color: var(--color-text);
    margin-bottom: 16px;
}

.muted {
    color: var(--color-muted);
}

/* ---------- Who It's For Cards ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.card h3 {
    color: var(--color-primary);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

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

/* ---------- Features ---------- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature {
    padding: 24px 8px;
}

.feature-number {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.feature h3 {
    color: var(--color-primary-dark);
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.feature p {
    color: var(--color-muted);
    margin: 0;
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    background: #fff;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-muted);
    font-size: 0.9rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 16px 0;
        gap: 12px;
    }

    .site-nav a {
        margin: 0 12px;
    }

    .hero {
        padding: 60px 0 50px;
    }

    .section {
        padding: 50px 0;
    }

    .footer-inner {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}