/* Literata, subset to Latin-1 and common punctuation (SIL OFL, see assets/fonts/Literata-LICENSE.txt) */
@font-face {
    font-family: "Literata";
    src: url("assets/fonts/Literata.woff2") format("woff2");
    font-weight: 200 900;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Literata";
    src: url("assets/fonts/Literata-Italic.woff2") format("woff2");
    font-weight: 200 900;
    font-style: italic;
    font-display: swap;
}

/* Colors come from the GitHub banner and the icon (see Fernanda/docs/Branding.md) */
:root {
    --ring: linear-gradient(135deg, #7CE1F9 0%, #3BB0F3 25%, #9194F2 75%, #F9B3F9 100%);
    --ring-dark: linear-gradient(135deg, #2A9AC8 0%, #1A7FC4 25%, #5A5EC8 75%, #C46AC8 100%);

    --page-top: #293642;
    --page-bottom: #181C27;
    --heading: #FAF6EE;
    --text: #ECE5D8;
    --muted: #AEB4BC;
    --link: #7CE1F9;
    --surface: rgba(255, 255, 255, 0.045);
    --border: rgba(255, 255, 255, 0.10);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
    --button-text: #181C27;

    --serif: "Literata", Georgia, "Times New Roman", serif;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Mono", Consolas, Menlo, monospace;

    --wide: 68rem;
    --narrow: 40rem;
}

@media (prefers-color-scheme: light) {
    :root {
        --page-top: #FAF6EE;
        --page-bottom: #EFE8DB;
        --heading: #181C27;
        --text: #293642;
        --muted: #5D6873;
        --link: #1A7FC4;
        --surface: rgba(24, 28, 39, 0.035);
        --border: rgba(24, 28, 39, 0.11);
        --shadow: 0 24px 60px rgba(41, 54, 66, 0.20);
    }
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 4.5rem;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(160deg, var(--page-top) 0%, var(--page-bottom) 60rem) var(--page-bottom);
    background-repeat: no-repeat;
    color: var(--text);
    font-family: var(--serif);
    font-size: 1.125rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--link);
    text-underline-offset: 0.18em;
    text-decoration-thickness: 1px;
}

a:hover {
    text-decoration-thickness: 2px;
}

:focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 3px;
    border-radius: 4px;
}

h1,
h2,
h3 {
    color: var(--heading);
    line-height: 1.2;
    font-weight: 600;
}

code {
    font-family: var(--mono);
    font-size: 0.88em;
    padding: 0.1em 0.35em;
    border-radius: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -3rem;
    padding: 0.5rem 1rem;
    background: var(--page-bottom);
    color: var(--heading);
    font-family: var(--sans);
    z-index: 10;
}

.skip-link:focus {
    top: 1rem;
}

/* Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 5;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: color-mix(in srgb, var(--page-top) 78%, transparent);
    border-bottom: 1px solid var(--border);
}

.nav {
    max-width: var(--wide);
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    font-family: var(--sans);
    font-size: 0.95rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--heading);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--muted);
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--heading);
}

/* Hero */

.hero {
    max-width: var(--wide);
    margin: 0 auto;
    padding: 5rem 1.5rem 3rem;
    text-align: center;
}

.hero-icon {
    margin: 0 auto 1.5rem;
    width: 7rem;
    filter: drop-shadow(0 10px 30px rgba(59, 176, 243, 0.25));
}

.hero h1 {
    font-size: clamp(2.75rem, 7vw, 4.25rem);
    margin: 0;
    letter-spacing: -0.01em;
    font-weight: 500;
    font-variation-settings: "opsz" 12;
}

.hero-tagline {
    font-size: clamp(1.2rem, 2.6vw, 1.5rem);
    color: var(--heading);
    margin: 0.75rem auto 0;
    max-width: 36rem;
}

.hero-sub {
    color: var(--muted);
    margin: 0.5rem 0 0;
    font-style: italic;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 2rem;
}

.hero-meta {
    font-family: var(--sans);
    font-size: 0.9rem;
    color: var(--muted);
    margin-top: 1rem;
}

.button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
    transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
    .button {
        transition: none;
    }

    .button:hover {
        transform: none;
    }
}

.button-primary {
    background: var(--ring);
    color: var(--button-text);
    box-shadow: 0 6px 20px rgba(59, 176, 243, 0.25);
}

.button-primary:hover {
    box-shadow: 0 8px 26px rgba(145, 148, 242, 0.35);
}

.button-secondary {
    color: var(--heading);
    border: 1px solid var(--border);
    background: var(--surface);
}

/* Screenshot */

.screenshot {
    max-width: 60rem;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.screenshot img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

/* Sections */

.prose,
.section {
    max-width: var(--wide);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.intro {
    max-width: calc(var(--narrow) + 3rem);
    margin-top: 5rem;
    font-size: 1.25rem;
}

.intro p:first-child {
    color: var(--heading);
}

.section {
    margin-top: 6rem;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.4rem);
    margin: 0 0 1.75rem;
    text-align: center;
}

.section-title::after {
    content: "";
    display: block;
    width: 3.5rem;
    height: 3px;
    margin: 1rem auto 0;
    border-radius: 3px;
    background: var(--ring);
}

.section-lead {
    max-width: var(--narrow);
    margin: 0 auto 2rem;
    text-align: center;
    color: var(--muted);
}

.section-note {
    max-width: var(--narrow);
    margin: 2rem auto 0;
    text-align: center;
    color: var(--muted);
    font-size: 1rem;
}

.highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
    gap: 1.25rem;
}

.highlight,
.pillar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.5rem 1.6rem;
}

.highlight h3,
.pillar h3 {
    margin: 0 0 0.6rem;
    font-size: 1.25rem;
}

.highlight p,
.pillar p {
    margin: 0;
}

.feature-list,
.compare-list {
    max-width: 52rem;
    margin: 0 auto;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.9rem 2.5rem;
}

.feature-list {
    grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
}

.feature-list li,
.compare-list li {
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before,
.compare-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: var(--ring);
}

.feature-list strong,
.compare-list strong {
    color: var(--heading);
    font-weight: 600;
}

.pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 1.25rem;
}

/* Download */

.download {
    text-align: center;
}

.notice {
    max-width: var(--narrow);
    margin: 2.5rem auto 0;
    padding: 1.25rem 1.5rem;
    text-align: left;
    font-size: 1rem;
    border-radius: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 4px solid #9194F2;
}

.notice p {
    margin: 0;
}

.notice p + p {
    margin-top: 0.6rem;
    color: var(--muted);
}

/* Footer */

.site-footer {
    max-width: var(--narrow);
    margin: 7rem auto 0;
    padding: 2.5rem 1.5rem 3rem;
    text-align: center;
    font-size: 1rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
}

.site-footer p {
    margin: 0 0 0.75rem;
}

.site-footer .footer-fine {
    font-family: var(--sans);
    font-size: 0.85rem;
    margin-top: 1.5rem;
}

/* Small screens */

@media (max-width: 40rem) {
    body {
        font-size: 1.05rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links li:nth-child(2) {
        display: none;
    }

    .hero {
        padding-top: 3.5rem;
    }

    .section {
        margin-top: 4.5rem;
    }

    .highlights,
    .feature-list,
    .pillars {
        grid-template-columns: 1fr;
    }
}