:root {
    --radius: 0.75rem;
    --background: oklch(0.995 0.004 100);
    --foreground: oklch(0.36 0.014 270);
    --card: oklch(1 0 0);
    --secondary: oklch(0.96 0.008 100);
    --muted-foreground: oklch(0.55 0.018 270);
    --border: oklch(0.9 0.01 100);
    --sage: oklch(0.74 0.055 145);
    --sage-light: oklch(0.88 0.035 145);
    --sage-dark: oklch(0.62 0.065 145);
    --shadow: 0 24px 60px oklch(0.36 0.014 270 / 0.12);
}

* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    min-height: 100vh;
    background: var(--background);
    color: var(--foreground);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-decoration: none;
}
svg {
    display: block;
}
.wrap {
    width: min(100% - 2rem, 72rem);
    margin-inline: auto;
}
.narrow {
    width: min(100% - 2rem, 48rem);
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid color-mix(in oklch, var(--border) 70%, transparent);
    background: color-mix(in oklch, var(--background) 88%, transparent);
    backdrop-filter: blur(16px);
}
.nav {
    height: 4.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}
.brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.brand-mark {
    width: 2rem;
    height: 2rem;
    display: grid;
    place-items: center;
    border-radius: 0.65rem;
    background: linear-gradient(135deg, var(--sage-dark), var(--sage-light));
    color: white;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--muted-foreground);
}
.nav-links a:hover,
.footer a:hover {
    color: var(--foreground);
}

.hero {
    padding: 6rem 0 5rem;
    overflow: hidden;
}
.hero-grid {
    display: grid;
    gap: 4rem;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: color-mix(in oklch, var(--secondary) 60%, transparent);
    color: var(--muted-foreground);
    font-size: 0.75rem;
    font-weight: 600;
}
.eyebrow svg {
    width: 0.9rem;
    color: var(--sage-dark);
}
h1,
h2,
h3,
p {
    margin-top: 0;
}
h1 {
    max-width: 11ch;
    margin: 1.5rem 0 1rem;
    font-size: clamp(2.6rem, 6vw, 4rem);
    line-height: 1.08;
    letter-spacing: -0.045em;
    font-weight: 650;
    text-wrap: balance;
}
.lead {
    max-width: 36rem;
    color: var(--muted-foreground);
    font-size: 1.125rem;
}
.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin-top: 2rem;
}
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    min-height: 2.8rem;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    background: var(--card);
    font-size: 0.875rem;
    font-weight: 650;
    transition:
        transform 0.2s,
        background 0.2s;
}
.button:hover {
    transform: translateY(-1px);
    background: var(--secondary);
}
.button-sage {
    background: var(--sage-dark);
    border-color: var(--foreground);
    color: var(--background);
}
.button-sage:hover {
    background: color-mix(in oklch, var(--sage-light) 90%, white);
}
.button-dark {
    background: var(--foreground);
    border-color: var(--foreground);
    color: var(--background);
}
.button-dark:hover {
    background: color-mix(in oklch, var(--foreground) 90%, white);
}
.button svg {
    width: 1.15rem;
    height: 1.15rem;
}
.checks {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 2rem;
    color: var(--muted-foreground);
    font-size: 0.875rem;
}
.check {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.check svg {
    width: 1rem;
    color: var(--sage-dark);
}

.preview-wrap {
    position: relative;
}
.preview-wrap::before {
    content: "";
    position: absolute;
    inset: -1.5rem;
    z-index: -1;
    border-radius: 3rem;
    background: radial-gradient(circle, color-mix(in oklch, var(--sage) 30%, transparent), transparent 68%);
    filter: blur(18px);
}
.preview {
    border: 1px solid color-mix(in oklch, var(--border) 70%, transparent);
    border-radius: 1.5rem;
    padding: 1.25rem;
    background: var(--card);
    box-shadow: var(--shadow);
    transform: rotate(1deg);
}
.preview-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}
.preview-title {
    font-weight: 700;
    letter-spacing: -0.02em;
}
.preview-date {
    color: var(--muted-foreground);
    font-size: 0.8rem;
}
.lesson {
    padding: 1rem;
    border-radius: 1rem;
    background: var(--secondary);
}
.lesson + .lesson {
    margin-top: 0.75rem;
}
.lesson-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}
.lesson strong {
    font-size: 0.92rem;
}
.lesson span {
    color: var(--muted-foreground);
    font-size: 0.78rem;
}
.lesson-bar {
    height: 0.35rem;
    margin-top: 0.8rem;
    overflow: hidden;
    border-radius: 99px;
    background: var(--border);
}
.lesson-bar i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--sage);
}

.section {
    padding: 5rem 0;
}
.section-tint {
    border-block: 1px solid color-mix(in oklch, var(--border) 60%, transparent);
    background: color-mix(in oklch, var(--secondary) 35%, transparent);
}
.section-heading {
    max-width: 40rem;
    margin: 0 auto 3.5rem;
    text-align: center;
}
.section-heading h2,
.teacher h2,
.cta h2 {
    margin-bottom: 0.75rem;
    font-size: clamp(2rem, 4vw, 2.5rem);
    line-height: 1.15;
    letter-spacing: -0.035em;
}
.section-heading p,
.teacher p {
    color: var(--muted-foreground);
}
.grid-3 {
    display: grid;
    gap: 1.5rem;
}
.card {
    padding: 1.5rem;
    border: 1px solid color-mix(in oklch, var(--border) 70%, transparent);
    border-radius: 1rem;
    background: var(--card);
}
.card:hover {
    border-color: color-mix(in oklch, var(--sage) 45%, var(--border));
}
.card-icon {
    width: 2.5rem;
    height: 2.5rem;
    display: grid;
    place-items: center;
    margin-bottom: 1rem;
    border-radius: 0.75rem;
    background: color-mix(in oklch, var(--sage) 16%, transparent);
    color: var(--sage-dark);
}
.card-icon svg {
    width: 1.25rem;
    height: 1.25rem;
}
.card h3 {
    margin-bottom: 0.4rem;
    font-size: 1.08rem;
}
.card p {
    margin: 0;
    color: var(--muted-foreground);
    font-size: 0.9rem;
}
.step {
    color: color-mix(in oklch, var(--sage) 45%, transparent);
    font-size: 2rem;
    font-weight: 700;
}
.step-card h3 {
    margin-top: 1rem;
}

.teacher {
    display: grid;
    gap: 2.5rem;
    padding: clamp(2rem, 5vw, 3rem);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    background: var(--card);
}
.teacher ul {
    padding: 0;
    margin: 2rem 0 0;
    list-style: none;
}
.teacher li {
    display: flex;
    gap: 0.65rem;
    margin-top: 0.9rem;
}
.teacher li svg {
    width: 1rem;
    flex: 0 0 auto;
    margin-top: 0.25rem;
    color: var(--sage-dark);
}
.quote {
    padding: 2rem;
    border-radius: 1rem;
    background: color-mix(in oklch, var(--sage) 12%, transparent);
}
.quote blockquote {
    margin: 0;
    font-size: 1.2rem;
    line-height: 1.65;
    font-weight: 600;
}
.quote cite {
    display: block;
    margin-top: 1.5rem;
    color: var(--muted-foreground);
    font-size: 0.85rem;
    font-style: normal;
}
.cta {
    padding: clamp(3rem, 7vw, 5rem) 1.5rem;
    border-radius: 1.5rem;
    background: var(--foreground);
    color: var(--background);
    text-align: center;
}
.cta p {
    max-width: 34rem;
    margin-inline: auto;
    color: color-mix(in oklch, var(--background) 78%, transparent);
}
.cta .button {
    margin-top: 1rem;
}
.contact-section {
    text-align: center;
}
.contact-section h2 {
    margin: 1rem 0 0.75rem;
    font-size: clamp(2rem, 4vw, 2.5rem);
    line-height: 1.15;
    letter-spacing: -0.035em;
}
.contact-section p {
    max-width: 38rem;
    margin-inline: auto;
    color: var(--muted-foreground);
}
.contact-section .button {
    margin-top: 1rem;
}

.legal {
    padding: 5rem 0;
}
.legal h1 {
    max-width: none;
    margin-top: 0;
    font-size: clamp(2.5rem, 5vw, 3.25rem);
}
.updated {
    color: var(--muted-foreground);
}
.legal-sections {
    display: grid;
    gap: 2.5rem;
    margin-top: 3rem;
}
.legal section {
    scroll-margin-top: 6rem;
}
.legal h2 {
    margin-bottom: 0.65rem;
    font-size: 1.2rem;
}
.legal section p,
.legal-note {
    color: var(--muted-foreground);
}
.legal a {
    color: var(--sage-dark);
    text-decoration: underline;
    text-underline-offset: 0.2rem;
}
.legal-note {
    margin-top: 3rem;
    font-size: 0.9rem;
}
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    color: var(--muted-foreground);
    font-size: 0.85rem;
}
.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
}
.footer-links {
    display: flex;
    gap: 1.25rem;
}

@media (min-width: 48rem) {
    .hero-grid,
    .teacher {
        grid-template-columns: 1fr 1fr;
    }
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 40rem) {
    .nav-links a:not(.button) {
        display: none;
    }
    .hero {
        padding-top: 4rem;
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *,
    *::before {
        transition: none !important;
    }
}