[data-public-landing] {
    --landing-bg: #f8fafc;
    --landing-surface: rgba(255, 255, 255, 0.95);
    --landing-card: rgba(255, 255, 255, 0.88);
    --landing-cyan: #0284c7;
    --landing-blue: #0052cc;
    --landing-text: #334155;
    --landing-muted: #64748b;
    --landing-bright: #0f172a;
    --landing-border: rgba(2, 132, 199, 0.3);
    min-height: 100vh;
    color: var(--landing-text);
    background-color: var(--landing-bg);
    background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0, 102, 255, 0.2), transparent 70%), linear-gradient(rgba(0, 240, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px);
    background-size: 100% 100%, 48px 48px, 48px 48px;
    font-family: "Plus Jakarta Sans", system-ui, sans-serif;
    line-height: 1.6;
}

[data-public-landing] *,
[data-public-landing] *::before,
[data-public-landing] *::after {
    box-sizing: border-box;
}

[data-public-landing] a {
    color: inherit;
    text-decoration: none;
}

[data-instance-start-page] .instance-primary-button {
    display: inline-flex;
    margin-top: 1rem;
    padding: 0.9rem 1.4rem;
    border-radius: 0.6rem;
    color: var(--landing-bright);
    background: linear-gradient(135deg, var(--landing-cyan), var(--landing-blue));
    font-weight: 800;
}

[data-instance-start-page] .instance-text-link {
    color: var(--landing-cyan);
    text-decoration: underline;
}

[data-public-landing] button {
    width: auto;
    margin: 0;
    padding: 0.65rem 1rem;
    border: 1px solid var(--landing-border);
    border-radius: 0.5rem;
    color: var(--landing-cyan);
    background: rgba(0, 240, 255, 0.1);
    font: inherit;
    font-weight: 700;
}

[data-public-landing] button:hover,
[data-public-landing] button:focus-visible,
[data-public-landing] a:hover,
[data-public-landing] a:focus-visible {
    color: var(--landing-cyan);
    border-color: var(--landing-cyan);
}

[data-public-landing] .landing-container {
    width: min(100% - 2.5rem, 72.5rem);
    margin-inline: auto;
}

[data-public-landing] .landing-header {
    position: sticky;
    z-index: 10;
    top: 0;
    border-bottom: 1px solid var(--landing-border);
    background: var(--landing-surface);
    backdrop-filter: blur(14px);
}

[data-public-landing] .landing-nav,
[data-public-landing] .landing-actions,
[data-public-landing] .landing-brand,
[data-public-landing] .landing-code,
[data-public-landing] .landing-teachers {
    display: flex;
    align-items: center;
}

[data-public-landing] .landing-nav {
    min-height: 4.25rem;
    justify-content: space-between;
    gap: 1.5rem;
}

[data-public-landing] .landing-brand {
    gap: 0.65rem;
}

[data-public-landing] .landing-brand strong {
    color: var(--landing-bright);
    font-size: 1.5rem;
    letter-spacing: -0.04em;
}

[data-public-landing] .landing-brand strong span,
[data-public-landing] .landing-kicker {
    color: var(--landing-cyan);
}

[data-public-landing] .landing-brand small {
    color: var(--landing-muted);
}

[data-public-landing] nav,
[data-public-landing] .landing-actions {
    display: flex;
    gap: 1rem;
}

[data-public-landing] nav button {
    padding: 0;
    border: 0;
    border-radius: 0;
    color: var(--landing-text);
    background: none;
    font-size: 0.9rem;
}

[data-public-landing] .landing-hero {
    padding-block: 4.5rem;
}

[data-public-landing] .landing-hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 3rem;
}

[data-public-landing] .landing-panel,
[data-public-landing] .landing-visual,
[data-public-landing] article {
    border: 1px solid var(--landing-border);
    border-radius: 1rem;
    background: var(--landing-card);
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.1);
    backdrop-filter: blur(14px);
}

[data-public-landing] .landing-hero-copy {
    position: relative;
    padding: 3rem 2.5rem;
}

[data-public-landing] .landing-corner {
    position: absolute;
    width: 1rem;
    height: 1rem;
    border-color: var(--landing-cyan);
    border-style: solid;
}

[data-public-landing] .landing-corner-tl {
    top: -2px;
    left: -2px;
    border-width: 2px 0 0 2px;
}

[data-public-landing] .landing-corner-tr {
    top: -2px;
    right: -2px;
    border-width: 2px 2px 0 0;
}

[data-public-landing] .landing-corner-bl {
    bottom: -2px;
    left: -2px;
    border-width: 0 0 2px 2px;
}

[data-public-landing] .landing-corner-br {
    right: -2px;
    bottom: -2px;
    border-width: 0 2px 2px 0;
}

[data-public-landing] .landing-kicker {
    margin-bottom: 0.65rem;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

[data-public-landing] h1,
[data-public-landing] h2,
[data-public-landing] h3 {
    color: var(--landing-bright);
}

[data-public-landing] h1 {
    margin-bottom: 1.25rem;
    font-size: clamp(2rem, 4.5vw, 3.4rem);
    line-height: 1.1;
    letter-spacing: -0.035em;
}

[data-public-landing] .landing-primary {
    display: inline-flex;
    margin-top: 1rem;
    padding: 0.9rem 1.4rem;
    border-radius: 0.6rem;
    color: var(--landing-bright);
    background: linear-gradient(135deg, var(--landing-cyan), var(--landing-blue));
    font-weight: 800;
}

[data-public-landing] .landing-visual {
    padding: 1.5rem;
}

[data-public-landing] .landing-visual img {
    display: block;
    width: 100%;
    height: auto;
}

[data-public-landing] .landing-section {
    padding-block: 3.5rem;
}

[data-public-landing] .landing-section h2 {
    margin-bottom: 1rem;
    font-size: clamp(1.75rem, 3.2vw, 2.5rem);
}

[data-public-landing] .landing-card-grid,
[data-public-landing] .landing-steps {
    display: grid;
    gap: 1.5rem;
    margin-top: 2rem;
}

[data-public-landing] .landing-card-grid {
    grid-template-columns: repeat(4, 1fr);
}

[data-public-landing] .landing-steps {
    grid-template-columns: repeat(3, 1fr);
}

[data-public-landing] article {
    padding: 1.75rem;
}

[data-public-landing] article strong {
    display: inline-grid;
    width: 2.4rem;
    height: 2.4rem;
    margin-bottom: 1rem;
    place-items: center;
    border: 1px solid var(--landing-cyan);
    border-radius: 0.5rem;
    color: var(--landing-cyan);
}

[data-public-landing] .landing-agent,
[data-public-landing] .landing-teachers {
    padding: 2.5rem;
}

[data-public-landing] .landing-code {
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--landing-border);
    border-radius: 0.6rem;
    background: var(--landing-surface);
}

[data-public-landing] .landing-code code {
    color: var(--landing-cyan);
    overflow-wrap: anywhere;
}

[data-public-landing] .landing-teachers {
    justify-content: space-between;
    gap: 2rem;
}

@media (max-width: 900px) {
    [data-public-landing] .landing-hero-grid,
    [data-public-landing] .landing-card-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    [data-public-landing] nav {
        display: none;
    }
}

@media (max-width: 640px) {
    [data-public-landing] .landing-brand small {
        display: none;
    }

    [data-public-landing] .landing-hero-grid,
    [data-public-landing] .landing-card-grid,
    [data-public-landing] .landing-steps {
        grid-template-columns: 1fr;
    }

    [data-public-landing] .landing-hero {
        padding-block: 2.5rem;
    }

    [data-public-landing] .landing-hero-copy,
    [data-public-landing] .landing-agent,
    [data-public-landing] .landing-teachers {
        padding: 1.5rem;
    }

    [data-public-landing] .landing-teachers,
    [data-public-landing] .landing-code {
        align-items: stretch;
        flex-direction: column;
    }
}