Hello world!

<style>
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
        --sand: #F5F0E8;
        --sand-2: #EDE7D8;
        --ink: #1A1714;
        --ink-soft: #5A5550;
        --moss: #2D4A32;
        --moss-lt: #4D7A54;
        --gold: #C89B3C;
        --gold-lt: #F0C870;
        --cream: #FFFDF8;
        --nav-h: 72px;
        --r: 14px;
        --r-lg: 22px;
    }

    html { scroll-behavior: smooth; }
    body {
        font-family: 'DM Sans', sans-serif;
        background: var(--cream);
        color: var(--ink);
        font-size: 16px;
        line-height: 1.6;
        overflow-x: hidden;
    }

    /* ─── NAV ─── */
    nav {
        position: fixed;
        top: 0; left: 0; right: 0;
        height: var(--nav-h);
        background: rgba(255,253,248,0.88);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(90,85,80,0.12);
        display: flex;
        align-items: center;
        padding: 0 5vw;
        z-index: 100;
        gap: 2rem;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        flex-shrink: 0;
    }
    .logo-mark {
        width: 36px;
        height: 36px;
        background: var(--moss);
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        overflow: hidden;
    }
    .logo-mark::before {
        content: '';
        position: absolute;
        width: 18px; height: 14px;
        border: 2px solid #fff;
        border-radius: 2px;
        top: 9px; left: 9px;
    }
    .logo-mark::after {
        content: '';
        position: absolute;
        width: 10px; height: 10px;
        background: var(--gold);
        border-radius: 2px;
        bottom: 7px; right: 7px;
    }
    .logo-text {
        font-family: 'Fraunces', serif;
        font-size: 1.3rem;
        font-weight: 600;
        color: var(--ink);
        letter-spacing: -0.02em;
    }
    .logo-text span { color: var(--moss); }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 2rem;
        list-style: none;
        margin-left: auto;
    }
    .nav-links a {
        font-size: 0.875rem;
        font-weight: 400;
        color: var(--ink-soft);
        text-decoration: none;
        letter-spacing: 0.01em;
        transition: color 0.2s;
    }
    .nav-links a:hover { color: var(--ink); }

    .btn-nav {
        background: var(--moss);
        color: #fff !important;
        padding: 8px 20px;
        border-radius: 8px;
        font-weight: 500 !important;
        transition: background 0.2s, transform 0.15s !important;
    }
    .btn-nav:hover {
        background: var(--moss-lt) !important;
        color: #fff !important;
        transform: translateY(-1px);
    }

    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        background: none;
        border: none;
        padding: 4px;
    }
    .hamburger span {
        display: block;
        width: 24px; height: 2px;
        background: var(--ink);
        border-radius: 2px;
        transition: all 0.3s;
    }

    /* ─── HERO ─── */
    .hero {
        min-height: 100svh;
        padding: calc(var(--nav-h) + 4rem) 5vw 5rem;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
        align-items: center;
        position: relative;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        width: 700px; height: 700px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(45,74,50,0.08) 0%, transparent 70%);
        top: -200px; right: -200px;
        pointer-events: none;
    }
    .hero-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(45,74,50,0.1);
        color: var(--moss);
        font-size: 0.78rem;
        font-weight: 500;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        padding: 6px 14px;
        border-radius: 100px;
        margin-bottom: 1.5rem;
    }
    .hero-eyebrow::before {
        content: '';
        width: 6px; height: 6px;
        border-radius: 50%;
        background: var(--moss);
        flex-shrink: 0;
    }
    .hero-title {
        font-family: 'Fraunces', serif;
        font-size: clamp(2.4rem, 5vw, 4rem);
        font-weight: 700;
        line-height: 1.1;
        letter-spacing: -0.03em;
        color: var(--ink);
        margin-bottom: 1.5rem;
    }
    .hero-title em {
        font-style: italic;
        color: var(--moss);
        font-weight: 300;
    }
    .hero-desc {
        font-size: 1.05rem;
        color: var(--ink-soft);
        line-height: 1.75;
        max-width: 480px;
        margin-bottom: 2.5rem;
        font-weight: 300;
    }
    .hero-cta {
        display: flex;
        align-items: center;
        gap: 1rem;
        flex-wrap: wrap;
    }
    .btn-primary {
        background: var(--moss);
        color: #fff;
        padding: 14px 28px;
        border-radius: 10px;
        font-size: 0.95rem;
        font-weight: 500;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
        letter-spacing: 0.01em;
    }
    .btn-primary:hover {
        background: var(--moss-lt);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(45,74,50,0.25);
    }
    .btn-primary svg { transition: transform 0.2s; }
    .btn-primary:hover svg { transform: translateX(3px); }

    .btn-ghost {
        color: var(--ink);
        font-size: 0.95rem;
        font-weight: 400;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        opacity: 0.7;
        transition: opacity 0.2s;
    }
    .btn-ghost:hover { opacity: 1; }

    .hero-stats {
        display: flex;
        gap: 2rem;
        margin-top: 3rem;
        padding-top: 2rem;
        border-top: 1px solid rgba(90,85,80,0.15);
    }
    .stat-num {
        font-family: 'Fraunces', serif;
        font-size: 1.8rem;
        font-weight: 600;
        color: var(--ink);
        line-height: 1;
        margin-bottom: 4px;
    }
    .stat-label {
        font-size: 0.78rem;
        color: var(--ink-soft);
        font-weight: 300;
        letter-spacing: 0.02em;
    }

    /* Hero visual */
    .hero-visual {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .mockup-shell {
        width: 100%;
        max-width: 480px;
        background: var(--sand);
        border-radius: var(--r-lg);
        border: 1px solid rgba(90,85,80,0.15);
        padding: 1.5rem;
        position: relative;
        box-shadow: 0 24px 64px rgba(26,23,20,0.1), 0 4px 16px rgba(26,23,20,0.06);
    }
    .mockup-topbar {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-bottom: 1.25rem;
    }
    .dot { width: 10px; height: 10px; border-radius: 50%; }
    .dot-r { background: #F08080; }
    .dot-y { background: var(--gold); }
    .dot-g { background: var(--moss-lt); }

    .mockup-search {
        flex: 1;
        background: rgba(255,253,248,0.8);
        border: 1px solid rgba(90,85,80,0.15);
        border-radius: 8px;
        height: 28px;
        margin-left: 0.5rem;
        display: flex;
        align-items: center;
        padding: 0 10px;
        gap: 6px;
    }
    .mockup-search-dot {
        width: 8px; height: 8px;
        border-radius: 50%;
        background: rgba(90,85,80,0.3);
    }
    .mockup-search-bar {
        height: 6px;
        flex: 1;
        background: rgba(90,85,80,0.12);
        border-radius: 3px;
    }

    .mockup-course {
        background: #fff;
        border-radius: var(--r);
        padding: 1.25rem;
        margin-bottom: 0.75rem;
        border: 1px solid rgba(90,85,80,0.1);
        display: flex;
        gap: 1rem;