/* ==========================================================================
   Monkeyfuse — site styles
   Single stylesheet shared by every page. No external dependencies:
   no webfonts, no CDNs, no trackers.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */

:root {
    /* Palette — light */
    --bg:           #fcfcfd;
    --surface:      #f4f4f6;
    --surface-raised: #ffffff;
    --ink:          #16161a;
    --ink-secondary: #4a4a55;
    --ink-tertiary: #6e6e7a;
    --line:         #e4e4e9;
    --line-strong:  #d3d3da;
    --accent:       #2b5ce6;
    --accent-hover: #1e47c4;
    --accent-wash:  #eef2fe;

    /* Type */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
                 "Liberation Mono", monospace;

    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;
    --space-9: 6rem;

    /* Geometry */
    --radius:    8px;
    --radius-sm: 5px;
    --measure:   68ch;   /* comfortable line length for prose */
    --page:      1060px; /* outer page width */
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg:           #0f1014;
        --surface:      #17181d;
        --surface-raised: #1c1d23;
        --ink:          #ececef;
        --ink-secondary: #a9a9b4;
        --ink-tertiary: #8a8a95;
        --line:         #26272e;
        --line-strong:  #33343d;
        --accent:       #8fb0ff;
        --accent-hover: #b3c8ff;
        --accent-wash:  #171b28;
    }
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */

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

* {
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--ink-secondary);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4 {
    color: var(--ink);
    font-weight: 640;
    line-height: 1.2;
    letter-spacing: -0.021em;
    text-wrap: balance;
}

h1 {
    font-size: clamp(2.25rem, 1.55rem + 3.1vw, 3.5rem);
    letter-spacing: -0.033em;
}

h2 {
    font-size: clamp(1.5rem, 1.3rem + 0.9vw, 1.9rem);
    letter-spacing: -0.026em;
}

h3 {
    font-size: 1.125rem;
    letter-spacing: -0.014em;
}

h4 {
    font-size: 1rem;
    letter-spacing: -0.01em;
}

p {
    text-wrap: pretty;
}

p + p,
p + ul,
p + ol,
ul + p,
ol + p {
    margin-top: var(--space-4);
}

strong {
    color: var(--ink);
    font-weight: 615;
}

a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--accent-hover);
}

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

ul, ol {
    padding-left: 1.35em;
}

li + li {
    margin-top: var(--space-2);
}

li::marker {
    color: var(--ink-tertiary);
}

/* Small uppercase label above a heading */
.eyebrow {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--ink-tertiary);
    margin-bottom: var(--space-3);
}

.lede {
    font-size: clamp(1.0625rem, 1rem + 0.35vw, 1.1875rem);
    color: var(--ink-secondary);
    line-height: 1.6;
}

.prose {
    max-width: var(--measure);
}

/* --------------------------------------------------------------------------
   4. Layout primitives
   -------------------------------------------------------------------------- */

.wrap {
    width: 100%;
    max-width: var(--page);
    margin-inline: auto;
    padding-inline: var(--space-5);
}

main {
    flex: 1 0 auto;
}

/* A horizontal band of content, separated by a hairline rule. */
.band {
    padding-block: var(--space-8);
    border-top: 1px solid var(--line);
}

.band--flush {
    border-top: 0;
}

.band--tight {
    padding-block: var(--space-7);
}

.band--muted {
    background: var(--surface);
}

@media (min-width: 768px) {
    .band { padding-block: var(--space-9); }
    .band--tight { padding-block: var(--space-8); }
}

/* Two-column: sticky section heading on the left, content on the right. */
.split {
    display: grid;
    gap: var(--space-5);
}

@media (min-width: 900px) {
    .split {
        grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
        gap: var(--space-7);
    }

    .split__heading {
        position: sticky;
        top: calc(var(--space-8) + 1rem);
        align-self: start;
    }
}

.skip-link {
    position: absolute;
    left: var(--space-4);
    top: var(--space-4);
    z-index: 200;
    padding: var(--space-2) var(--space-4);
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 550;
    text-decoration: none;
    transform: translateY(-250%);
    transition: transform 0.15s ease;
}

.skip-link:focus {
    transform: translateY(0);
    color: #fff;
}

/* --------------------------------------------------------------------------
   5. Header & navigation
   -------------------------------------------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: saturate(1.6) blur(12px);
    -webkit-backdrop-filter: saturate(1.6) blur(12px);
    border-bottom: 1px solid var(--line);
}

@supports not (background: color-mix(in srgb, red 50%, transparent)) {
    .site-header { background: var(--bg); }
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    min-height: 60px;
    padding-block: var(--space-3);
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--ink);
    font-size: 1.0625rem;
    font-weight: 640;
    letter-spacing: -0.021em;
    text-decoration: none;
    white-space: nowrap;
}

.wordmark:hover {
    color: var(--ink);
}

.wordmark svg {
    display: block;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    flex-shrink: 0;
}

.nav {
    display: flex;
    align-items: center;
    gap: clamp(var(--space-4), 2.4vw, var(--space-6));
    list-style: none;
    padding: 0;
}

.nav li + li {
    margin-top: 0;
}

.nav a {
    position: relative;
    display: block;
    padding-block: var(--space-1);
    color: var(--ink-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
}

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

.nav a[aria-current="page"] {
    color: var(--ink);
}

.nav a[aria-current="page"]::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

@media (max-width: 640px) {
    .site-header__inner {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .nav {
        gap: var(--space-4);
        flex-wrap: wrap;
    }

    .nav a {
        font-size: 0.875rem;
    }
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */

.hero {
    padding-block: var(--space-8) var(--space-8);
}

@media (min-width: 768px) {
    .hero { padding-block: var(--space-9) var(--space-8); }
}

.hero h1 {
    max-width: 16ch;
}

.hero .lede {
    max-width: 54ch;
    margin-top: var(--space-5);
}

.hero__rule {
    width: 3.5rem;
    height: 2px;
    background: var(--accent);
    border: 0;
    margin-top: var(--space-6);
}

/* --------------------------------------------------------------------------
   7. Components
   -------------------------------------------------------------------------- */

/* Status pill — e.g. "In development" */
.status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.7rem 0.3rem 0.6rem;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: var(--surface-raised);
    color: var(--ink-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: -0.005em;
    white-space: nowrap;
}

.status::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* Definition-style grid used for values and capabilities. */
.grid {
    display: grid;
    gap: var(--space-6) var(--space-7);
    grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
}

.grid--2 {
    grid-template-columns: repeat(auto-fit, minmax(min(19rem, 100%), 1fr));
}

.item h3 {
    margin-bottom: var(--space-2);
}

.item p {
    font-size: 0.9375rem;
}

/* Numbered/hairline-separated feature list */
.feature-list {
    list-style: none;
    padding: 0;
    border-top: 1px solid var(--line);
}

.feature-list li {
    margin-top: 0;
    padding-block: var(--space-4);
    border-bottom: 1px solid var(--line);
    display: grid;
    gap: var(--space-1) var(--space-5);
}

@media (min-width: 700px) {
    .feature-list li {
        grid-template-columns: minmax(0, 17rem) minmax(0, 1fr);
        align-items: baseline;
    }
}

.feature-list__term {
    color: var(--ink);
    font-weight: 600;
    letter-spacing: -0.012em;
}

.feature-list__desc {
    color: var(--ink-secondary);
    font-size: 0.9375rem;
}

/* App screenshots. Portrait device shots, sized by their own aspect ratio. */
.shots {
    display: grid;
    gap: var(--space-5);
    grid-template-columns: repeat(auto-fit, minmax(min(13rem, 100%), 1fr));
    max-width: 46rem;
    list-style: none;
    padding: 0;
}

.shots li {
    margin-top: 0;
}

.shots figure {
    margin: 0;
}

.shots img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 828 / 1792;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
}

.shots figcaption {
    margin-top: var(--space-3);
    color: var(--ink-tertiary);
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* Bordered panel, used sparingly. Flat — no drop shadows. */
.panel {
    padding: var(--space-6);
    background: var(--surface-raised);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

@media (min-width: 768px) {
    .panel { padding: var(--space-7); }
}

.panel > * + * {
    margin-top: var(--space-4);
}

/* Contact detail blocks */
.details {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
}

.details dt {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--ink-tertiary);
    margin-bottom: var(--space-2);
}

.details dd {
    margin: 0;
    color: var(--ink-secondary);
}

.details dd a {
    font-weight: 550;
}

address {
    font-style: normal;
}

/* Inline text link with arrow */
.arrow-link {
    display: inline-flex;
    align-items: baseline;
    gap: 0.35rem;
    font-weight: 550;
    text-decoration: none;
}

.arrow-link::after {
    content: "\2192";
    transition: transform 0.15s ease;
}

.arrow-link:hover {
    text-decoration: underline;
}

.arrow-link:hover::after {
    transform: translateX(2px);
}

/* Back link at the top of legal pages */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: var(--space-5);
    color: var(--ink-tertiary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
}

.back-link:hover {
    color: var(--ink);
}

/* --------------------------------------------------------------------------
   8. Legal documents (privacy, terms)
   -------------------------------------------------------------------------- */

.doc {
    max-width: var(--measure);
}

.doc__meta {
    margin-top: var(--space-4);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--line);
    color: var(--ink-tertiary);
    font-size: 0.875rem;
}

.doc h2 {
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
    padding-top: var(--space-5);
    border-top: 1px solid var(--line);
    font-size: 1.375rem;
}

.doc h3 {
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}

.doc ul,
.doc ol {
    margin-top: var(--space-4);
}

.doc li {
    color: var(--ink-secondary);
}

/* Table of contents */
.toc {
    margin-top: var(--space-6);
    padding: var(--space-5) var(--space-6);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.toc h2 {
    margin: 0 0 var(--space-3);
    padding: 0;
    border: 0;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--ink-tertiary);
}

.toc ol {
    columns: 2;
    column-gap: var(--space-6);
    padding-left: 1.15em;
    margin: 0;
    font-size: 0.9375rem;
}

.toc li {
    margin-top: 0;
    padding-block: 0.15rem;
    break-inside: avoid;
}

.toc a {
    text-decoration: none;
}

.toc a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    .toc ol { columns: 1; }
}

/* Callout for the "we don't track you" statement */
.callout {
    margin-top: var(--space-5);
    padding: var(--space-5);
    background: var(--accent-wash);
    border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
    border-radius: var(--radius);
    color: var(--ink-secondary);
}

@supports not (background: color-mix(in srgb, red 50%, transparent)) {
    .callout { border-color: var(--line-strong); }
}

.callout > * + * {
    margin-top: var(--space-3);
}

/* --------------------------------------------------------------------------
   9. Footer
   -------------------------------------------------------------------------- */

.site-footer {
    flex-shrink: 0;
    margin-top: var(--space-8);
    padding-block: var(--space-7);
    border-top: 1px solid var(--line);
    background: var(--surface);
}

.site-footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4) var(--space-6);
}

.site-footer nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-5);
    list-style: none;
    padding: 0;
}

.site-footer nav li + li {
    margin-top: 0;
}

.site-footer nav a {
    color: var(--ink-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
}

.site-footer nav a:hover {
    color: var(--ink);
    text-decoration: underline;
}

.site-footer__legal {
    color: var(--ink-tertiary);
    font-size: 0.8125rem;
}

/* --------------------------------------------------------------------------
   10. Error page
   -------------------------------------------------------------------------- */

.error-page {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-block: var(--space-9);
    text-align: left;
}

.error-page .status {
    margin-bottom: var(--space-5);
}

/* --------------------------------------------------------------------------
   11. Print
   -------------------------------------------------------------------------- */

@media print {
    .site-header,
    .site-footer,
    .skip-link,
    .back-link,
    .toc {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
        font-size: 11pt;
    }

    .doc h2 {
        break-after: avoid;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: #444;
    }
}