/* =============================================================================
   PairNepal — brand layer
   Loaded after styles-main.css and styles-deferred.css.
   Keeps the upstream app DOM contract untouched (every id/class it styles
   still exists); this file re-tokenises and re-skins.

   Craft rules applied (see research/CRAFT.md):
   - one accent per view; crimson is the only interactive accent
   - motion on transform/opacity only, interaction feedback <= 200ms
   - no gradient or glow used as a primary affordance
   - prefers-reduced-motion honoured everywhere
   - fixed z-index scale (--pn-z-*), no arbitrary values
   ========================================================================== */

/* ---------------------------------------------------------------------------
   1. Tokens
   ------------------------------------------------------------------------ */
:root {
    /* surfaces */
    --pn-canvas: #f7f8fa;
    --pn-surface: #ffffff;
    --pn-surface-2: #f1f3f7;
    --pn-surface-3: #e9ecf3;

    /* lines */
    --pn-line: #e4e7ee;
    --pn-line-strong: #d3d8e3;

    /* ink */
    --pn-ink: #101828;
    --pn-ink-2: #475467;
    --pn-ink-3: #8896ab;

    /* accent — the single interactive accent */
    --pn-accent: #c11235;
    --pn-accent-hover: #a30e2c;
    --pn-accent-soft: #fdeef1;

    /* brand + semantics (identity and status only, never affordances) */
    --pn-brand-crimson: #dc143c;
    --pn-blue: #003893;
    --pn-blue-soft: #edf1fa;
    --pn-ok: #0e9f6e;
    --pn-ok-soft: #e6f6f0;
    --pn-warn: #b45309;
    --pn-warn-soft: #fdf3e7;
    --pn-danger: #b42318;

    /* type */
    --pn-font-display: "Instrument Serif", "Iowan Old Style", Georgia, serif;
    --pn-font-ui: "Instrument Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --pn-font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    /* radii */
    --pn-r-xs: 8px;
    --pn-r-sm: 10px;
    --pn-r-md: 14px;
    --pn-r-lg: 20px;
    --pn-r-xl: 28px;
    --pn-r-pill: 999px;

    /* elevation — light, never decorative */
    --pn-shadow-1: 0 1px 2px rgba(16, 24, 40, .05);
    --pn-shadow-2: 0 10px 24px -18px rgba(16, 24, 40, .38);
    --pn-shadow-3: 0 28px 56px -34px rgba(16, 24, 40, .45);

    /* z-index scale */
    --pn-z-base: 1;
    --pn-z-raised: 5;
    --pn-z-header: 20;
    --pn-z-panel: 40;
    --pn-z-dialog: 60;
    --pn-z-toast: 80;

    /* motion */
    --pn-ease-out: cubic-bezier(.22, .61, .36, 1);
    --pn-ease-in-out: cubic-bezier(.4, 0, .2, 1);
    --pn-dur-feedback: 160ms;
    --pn-dur-shift: 260ms;
    --pn-dur-enter: 420ms;

    --pn-hairline: 1px solid var(--pn-line);
    --pn-focus: 0 0 0 2px var(--pn-surface), 0 0 0 4px var(--pn-accent);
}

/* Map the upstream app tokens onto the brand values.
   --text-color / --bg-color must stay RGB triplets (used as rgb(var(--x))). */
body {
    --primary-color: var(--pn-accent);
    --paired-device-color: var(--pn-blue);
    --public-room-color: var(--pn-warn);
    --accent-color: var(--pn-accent);
    --ws-peer-color: var(--pn-danger);
    --btn-disabled-color: var(--pn-ink-3);

    --text-color: 16, 24, 40;
    --bg-color: 247, 248, 250;
    --bg-color-secondary: #ffffff;
    --dialog-bg-color: #ffffff;
    --border-color: #e4e7ee;
    --badge-color: #8896ab;
    --lang-hr-color: #e4e7ee;

    --shadow-color-rgb: 16, 24, 40;
    --shadow-color-cover-rgb: 247, 248, 250;
    --shadow-color-secondary-rgb: 16, 24, 40;
    --shadow-color-secondary-cover-rgb: 241, 243, 247;
    --shadow-color-dialog-rgb: 16, 24, 40;
    --shadow-color-dialog-cover-rgb: 247, 248, 250;

    --icon-size: 22px;
    --peer-width: 132px;
}

/* Refined dark theme — same hues, inverted surfaces, accent lifted for contrast. */
body.dark-theme {
    --pn-canvas: #0b0d12;
    --pn-surface: #14171f;
    --pn-surface-2: #1b1f29;
    --pn-surface-3: #242936;
    --pn-line: #262c39;
    --pn-line-strong: #333a4a;
    --pn-ink: #eef1f7;
    --pn-ink-2: #a7b0c0;
    --pn-ink-3: #6f7a8d;
    --pn-accent: #ff5470;
    --pn-accent-hover: #ff7089;
    --pn-accent-soft: #2b1319;
    --pn-blue: #7aa2f7;
    --pn-blue-soft: #131b2e;
    --pn-ok: #4ad4a4;
    --pn-ok-soft: #10231d;
    --pn-warn: #f0b357;
    --pn-warn-soft: #241b0f;
    --pn-danger: #ff8a80;

    --text-color: 238, 241, 247;
    --bg-color: 11, 13, 18;
    --bg-color-secondary: #14171f;
    --dialog-bg-color: #14171f;
    --border-color: #262c39;
    --badge-color: #6f7a8d;
    --lang-hr-color: #262c39;

    --shadow-color-rgb: 0, 0, 0;
    --shadow-color-cover-rgb: 11, 13, 18;
    --shadow-color-secondary-rgb: 0, 0, 0;
    --shadow-color-secondary-cover-rgb: 20, 23, 31;
    --shadow-color-dialog-rgb: 0, 0, 0;
    --shadow-color-dialog-cover-rgb: 11, 13, 18;

    --pn-shadow-1: 0 1px 2px rgba(0, 0, 0, .5);
    --pn-shadow-2: 0 10px 24px -18px rgba(0, 0, 0, .8);
    --pn-shadow-3: 0 28px 56px -34px rgba(0, 0, 0, .9);
}

@media (prefers-color-scheme: dark) {
    body:not(.light-theme) {
        --pn-canvas: #0b0d12;
        --pn-surface: #14171f;
        --pn-surface-2: #1b1f29;
        --pn-surface-3: #242936;
        --pn-line: #262c39;
        --pn-line-strong: #333a4a;
        --pn-ink: #eef1f7;
        --pn-ink-2: #a7b0c0;
        --pn-ink-3: #6f7a8d;
        --pn-accent: #ff5470;
        --pn-accent-hover: #ff7089;
        --pn-accent-soft: #2b1319;
        --pn-blue: #7aa2f7;
        --pn-blue-soft: #131b2e;
        --pn-ok: #4ad4a4;
        --pn-ok-soft: #10231d;
        --pn-warn: #f0b357;
        --pn-warn-soft: #241b0f;

        --text-color: 238, 241, 247;
        --bg-color: 11, 13, 18;
        --bg-color-secondary: #14171f;
        --dialog-bg-color: #14171f;
        --border-color: #262c39;
        --badge-color: #6f7a8d;
        --lang-hr-color: #262c39;
    }
}

/* ---------------------------------------------------------------------------
   2. Base
   ------------------------------------------------------------------------ */
body {
    background-color: var(--pn-canvas);
    color: var(--pn-ink);
    font-family: var(--pn-font-ui);
    font-size: 15px;
    line-height: 1.55;
    font-feature-settings: "cv05" 1, "ss01" 1;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    transition: background-color var(--pn-dur-shift) var(--pn-ease-out),
                color var(--pn-dur-shift) var(--pn-ease-out);
}

h1, h2, h3, h4 {
    font-family: var(--pn-font-display);
    font-weight: 400;
    letter-spacing: -.01em;
    text-wrap: balance;
    color: var(--pn-ink);
}

p { text-wrap: pretty; }

code, kbd, samp, .font-mono { font-family: var(--pn-font-mono); }

::selection {
    background: var(--pn-accent);
    color: var(--pn-accent-ink, #fff);
}

/* Focus is always visible and never removed. */
:focus-visible {
    outline: none;
    box-shadow: var(--pn-focus);
    border-radius: var(--pn-r-xs);
}

/* Accessible skip target for keyboard users. */
.pn-skip {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: var(--pn-z-toast);
    background: var(--pn-surface);
    color: var(--pn-ink);
    padding: 10px 16px;
    border-radius: var(--pn-r-sm);
    border: var(--pn-hairline);
    font-weight: 600;
}
.pn-skip:focus { left: 12px; top: 12px; }

/* ---------------------------------------------------------------------------
   3. Header
   ------------------------------------------------------------------------ */
header {
    padding: 14px 18px;
    min-height: 64px;
    align-items: center;
}

/* Upstream ships `header * { transition: all 300ms }`; on the icon buttons that
   reads as sluggish, so it is switched off there and only there. */
header .icon-button,
header .icon-button * { transition: none; }

header > .icon-button,
header .icon-button {
    height: 38px;
    min-width: 38px;
    border-radius: var(--pn-r-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--pn-ink-2);
    border: 1px solid transparent;
}

header .icon-button:hover {
    background: var(--pn-surface-2);
    border-color: var(--pn-line);
    color: var(--pn-ink);
}

header .icon-button.selected {
    background: var(--pn-accent-soft);
    border-color: transparent;
    color: var(--pn-accent);
}

header .icon-button:active { background: var(--pn-surface-3); }

/* The brand lockup lives in the header and is keyboard-focusable. */
.pn-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    /* row-reverse: this margin is the side facing the tool cluster, so it
       consumes the free space and pushes the brand to the far left. */
    margin-right: auto;
    border-radius: var(--pn-r-sm);
    padding: 4px 8px 4px 4px;
    text-decoration: none;
    color: inherit;
    min-width: 0;
}

.pn-brand__mark {
    width: 34px;
    height: 34px;
    flex: none;
    border-radius: var(--pn-r-sm);
    display: grid;
    place-items: center;
    /* Matches the generated favicon/app icons exactly: solid accent tile,
       white mark. Previously a soft tint with an accent mark, which made the
       tab icon and the in-app logo disagree. */
    background: var(--pn-accent);
    border: 1px solid transparent;
    box-shadow: var(--pn-shadow-1);
}

.pn-brand__mark svg { width: 20px; height: 20px; display: block; }

.pn-brand__text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }

.pn-brand__name {
    font-family: var(--pn-font-display);
    font-size: 19px;
    letter-spacing: -.015em;
    color: var(--pn-ink);
    white-space: nowrap;
}

.pn-brand__tag {
    font-size: 10.5px;
    letter-spacing: .06em;
    text-transform: uppercase;
    /* ink-3 is ~2.8:1 on the light canvas — too faint for text this small.
       ink-2 clears AA at roughly 7:1 in light and stays comfortable in dark. */
    color: var(--pn-ink-2);
    white-space: nowrap;
}

@media (max-width: 620px) {
    .pn-brand__tag { display: none; }
    .pn-brand__name { font-size: 17px; }
}

/* ---------------------------------------------------------------------------
   4. Device grid (peers)
   ------------------------------------------------------------------------ */
#center {
    padding: 8px 18px 0;
}

x-peer {
    padding: 10px;
    border-radius: var(--pn-r-lg);
    transform: scale(1);
    transition: transform var(--pn-dur-feedback) var(--pn-ease-out);
}

x-peer:focus-visible { box-shadow: var(--pn-focus); }

/* The device tile — the app's dynamic markup is
   .column.center.pointer > .icon-wrapper + .name.font-subheading + .device-descriptor */
x-peer > .column,
x-peer .icon-wrapper {
    transition: transform var(--pn-dur-shift) var(--pn-ease-out);
}

x-peer .icon-wrapper {
    position: relative;
    width: 96px;
    height: 96px;
    border-radius: var(--pn-r-xl);
    display: grid;
    place-items: center;
    background: var(--pn-surface);
    border: var(--pn-hairline);
    box-shadow: var(--pn-shadow-1);
    color: var(--pn-ink-2);
}

x-peer .icon-wrapper .icon {
    width: 40px;
    height: 40px;
    color: var(--pn-ink-2);
}

/* Tux is drawn with fine outline detail where every other OS mark is a solid
   silhouette, so at tile size it reads noticeably lighter than its neighbours.
   A small optical bump restores the match rather than swapping the glyph. */
x-peer .icon-wrapper .icon[data-device="os-linux"] {
    width: 47px;
    height: 47px;
}

/* Live presence ring — a single, calm pulse. Never a glow-as-affordance. */
x-peer .icon-wrapper .circle {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1.5px solid var(--pn-ok);
    opacity: 0;
}

x-peer:not(.ws-peer) .icon-wrapper .circle {
    animation: pn-presence 3.2s var(--pn-ease-out) infinite;
    animation-play-state: paused;
}

/* Pause every looping animation while the tab is hidden (see brand-motion.js). */
body.pn-idle x-peer .icon-wrapper .circle,
body.pn-idle .pn-ident__ring { animation-play-state: paused; }

x-peer:hover .icon-wrapper,
x-peer:focus-within .icon-wrapper {
    transform: translateY(-3px);
    border-color: var(--pn-line-strong);
    box-shadow: var(--pn-shadow-2);
}

/* A display name is something the visitor chose; an ellipsis silently hides it.
   Two lines of break-anywhere text shows every realistic name in full while
   keeping the tile grid aligned. */
x-peer .name {
    margin-top: 12px;
    font-family: var(--pn-font-ui);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -.005em;
    color: var(--pn-ink);
    width: 100%;
    max-width: 18ch;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    overflow-wrap: anywhere;
    line-height: 1.25;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* Stacked: display name, then the operating system in full, then status. */
x-peer .device-descriptor {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    margin-top: 5px;
    width: 100%;
}

x-peer .device-name,
x-peer .status {
    font-size: 11.5px;
    color: var(--pn-ink-3);
    letter-spacing: .01em;
}

/* The operating-system name, printed in full directly under the icon tile. */
x-peer .device-name {
    width: 100%;
    text-align: center;
    overflow-wrap: anywhere;
    font-weight: 600;
    color: var(--pn-ink-2);
}

x-peer .status { font-variant-numeric: tabular-nums; }

/* Transfer progress: a hairline, never a chunky bar. */
x-peer .progress {
    margin-top: 10px;
    height: 3px;
    width: 96px;
    border-radius: var(--pn-r-pill);
    background: var(--pn-surface-3);
    overflow: hidden;
}

x-peer .progress > * {
    height: 100%;
    background: var(--pn-accent);
    transform-origin: left center;
    transition: transform 220ms linear;
}

/* Paired devices + public-room peers get a quieter, secondary treatment
   so the single accent stays reserved for direct interaction. */
x-peer.paired .icon-wrapper { border-color: var(--pn-blue); color: var(--pn-blue); }

/* ---------------------------------------------------------------------------
   5. Empty state + instructions
   ------------------------------------------------------------------------ */
x-no-peers h1,
x-no-peers h2 {
    font-size: clamp(22px, 3.4vw, 30px);
    margin-bottom: 10px;
}

/* The About dialog names the product; the page's single <h1> is the discovery
   headline in the empty state, so this stays a heading one level down. */
#about .pn-about-name {
    font-family: var(--pn-font-display);
    font-size: 32px;
    font-weight: 400;
    letter-spacing: -.015em;
    line-height: 1.1;
    margin: 0;
    /* The About panel sits on the crimson field, which sets `color: white`.
       Heading tokens must not override that here, or the title lands as
       near-black on crimson at roughly 2.4:1. */
    color: inherit;
}

/* ---------------------------------------------------------------- About
   Upstream spaces this panel with margin accidents rather than rhythm: the
   tagline and the action button sit flush against the wordmark, the credit
   wraps with its separator stranded at the end of a line, and the icon row
   carries a -16px bottom margin that lets 40px icons crash into the line
   above. The panel is also painted on the crimson field, so the quiet
   ink-3/ink-2 credit tokens drop to roughly 3:1 and 1.5:1 there.
   Rebuilt with explicit spacing and on-field text colours. */
#about {
    --pn-on-accent: rgba(255, 255, 255, .94);
    --pn-on-accent-2: rgba(255, 255, 255, .74);
    --pn-on-accent-line: rgba(255, 255, 255, .34);
}

#about section {
    width: 100%;
    max-width: 560px;
    padding: 0 20px;
    box-sizing: border-box;
}

/* The default mark tile is a solid accent square, which lands on the accent
   field and disappears (crimson on crimson in light, pink on pink in dark).
   A translucent glass tile reads on the field in both themes. */
#about .pn-about-mark {
    margin: 0 auto 18px;
    background: rgba(255, 255, 255, .16);
    border: 1px solid rgba(255, 255, 255, .38);
    color: #fff;
    box-shadow: 0 12px 28px -20px rgba(0, 0, 0, .8);
}

#about .title-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-bottom: 14px;
}

/* Upstream indents this child by 0.4em for a logo-beside-text lockup that no
   longer exists; with the element stacked it just off-centres the tagline. */
#about .title-wrapper > div { margin-left: 0; }

#about .pn-about-tag {
    font-size: 12px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--pn-on-accent-2);
}

#about .pn-about-claim {
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--pn-on-accent);
    max-width: 44ch;
    margin: 0 auto 22px;
}

#about a.pn-about-link { margin-bottom: 4px; }

#about .pn-credit {
    flex-direction: column;
    align-items: center;
    gap: 6px;
    margin-top: 20px;
    max-width: none;
    color: var(--pn-on-accent-2);
}

/* Colours for the credit when it sits on the accent field (see .pn-credit__item
   for the wrapping fix, which applies everywhere). */
#about .pn-credit__line { color: inherit; }

#about .pn-credit a {
    color: var(--pn-on-accent);
    border-bottom-color: var(--pn-on-accent-line);
}

#about .pn-credit a:hover {
    color: #fff;
    border-bottom-color: #fff;
}

#about .pn-credit__sep { color: var(--pn-on-accent-line); }

#about .pn-about-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin: 22px 0 0;
}

/* Upstream reserves/then cancels space with `margin: 8px 8px -16px`, which
   lets the 40px buttons overshoot their own 32px row and collide with the
   credit above. Real spacing instead. */
#about .pn-about-links a.icon-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin: 0;
    border-radius: var(--pn-r-sm);
    color: var(--pn-on-accent);
    border: 1px solid transparent;
    transition: background-color var(--pn-dur-feedback) var(--pn-ease-out),
                border-color var(--pn-dur-feedback) var(--pn-ease-out);
}

#about .pn-about-links a.icon-button:hover {
    background: rgba(255, 255, 255, .14);
    border-color: var(--pn-on-accent-line);
    color: #fff;
}

#about .pn-about-links a.icon-button:focus-visible {
    box-shadow: 0 0 0 2px transparent, 0 0 0 4px #fff;
}

#about .pn-about-links a.icon-button::before { content: none; }

@media (max-height: 560px) {
    #about .pn-about-mark { display: none; }
    #about .pn-about-claim { margin-bottom: 16px; }
    #about .pn-about-links { margin-top: 16px; }
}

x-no-peers > div {
    color: var(--pn-ink-2);
    font-size: 15px;
    max-width: 44ch;
    margin: 0 auto;
}

x-instructions {
    color: var(--pn-ink-2);
    font-size: 14px;
}

/* ---------------------------------------------------------------------------
   6. Footer + discovery
   ------------------------------------------------------------------------ */
footer { margin: 0 18px 18px; }

footer .logo {
    --icon-size: 56px;
    color: var(--pn-accent);
    margin-bottom: 10px;
}

/* Upstream lays this row out as inline text and compensates for the badge's
   1rem transparent side borders with a -1rem negative margin on both the badge
   and the pen. The brand layer re-declared `background` on the badge, and that
   shorthand resets `background-clip` to `border-box` — so the badge's own fill
   began painting across its transparent left border, which sits on top of the
   trailing "as" of the label. Hence the overlap.
   Re-laying the row out as flex and cancelling both sides of the hack removes
   the cause instead of patching the symptom. */
.known-as-wrapper {
    font-size: 13px;
    color: var(--pn-ink-2);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 3px 8px;
    min-height: 22px;
}

.known-as-wrapper > * { flex: 0 0 auto; }

/* Specificity must beat upstream's `html:not([dir="rtl"]) #display-name`
   (0,1,1,1), so both the html type selector and the wrapper class are used. */
html:not([dir="rtl"]) .known-as-wrapper > #display-name,
html[dir="rtl"] .known-as-wrapper > #display-name {
    margin-left: 0;
    margin-right: 0;
    border-left-width: 0;
    border-right-width: 0;
    background-clip: border-box;
    height: auto;
    min-height: 20px;
    margin-bottom: 0;
    line-height: 1.45;
    white-space: normal;
    overflow-wrap: anywhere;
    max-width: min(24ch, 100%);
}

html:not([dir="rtl"]) .known-as-wrapper > .edit-pen,
html[dir="rtl"] .known-as-wrapper > .edit-pen {
    margin-left: 0;
    margin-right: 0;
}

#display-name.badge {
    background-color: var(--pn-surface-2);
    color: var(--pn-ink);
    border: var(--pn-hairline);
    border-radius: var(--pn-r-sm);
    padding: 3px 10px;
    font-weight: 600;
}

.edit-pen { color: var(--pn-ink-3); }

.discovery-wrapper {
    margin-top: 10px;
    gap: 6px;
    padding: 10px 14px;
    border-radius: var(--pn-r-md);
    background: var(--pn-surface);
    border: var(--pn-hairline);
    box-shadow: var(--pn-shadow-1);
    font-size: 12px;
    color: var(--pn-ink-3);
}

.badge {
    border-radius: var(--pn-r-pill);
    padding: 4px 11px;
    background: var(--pn-surface-2);
    color: var(--pn-ink-2);
    font-size: 11.5px;
    font-weight: 600;
    border: var(--pn-hairline);
}

.badge-room-ip { background: var(--pn-blue-soft); color: var(--pn-blue); border-color: transparent; }
.badge-room-secret { background: var(--pn-ok-soft); color: var(--pn-ok); border-color: transparent; }
.badge-room-public-id { background: var(--pn-warn-soft); color: var(--pn-warn); border-color: transparent; }

.highlight { background: var(--pn-surface-2); border-radius: var(--pn-r-xs); padding: 1px 5px; }
.highlight-room-ip { background: var(--pn-blue-soft); color: var(--pn-blue); }
.highlight-room-secret { background: var(--pn-ok-soft); color: var(--pn-ok); }
.highlight-room-public-id { background: var(--pn-warn-soft); color: var(--pn-warn); }

/* ---------------------------------------------------------------------------
   7. Buttons
   ------------------------------------------------------------------------ */
.btn {
    font-family: var(--pn-font-ui);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .005em;
    text-transform: none;
    line-height: 20px;
    padding: 10px 18px;
    border-radius: var(--pn-r-sm);
    background: var(--pn-surface);
    color: var(--pn-ink);
    border: 1px solid var(--pn-line-strong);
    box-shadow: none;
    transition: transform var(--pn-dur-feedback) var(--pn-ease-out),
                background-color var(--pn-dur-feedback) var(--pn-ease-out),
                border-color var(--pn-dur-feedback) var(--pn-ease-out);
}

.btn:hover {
    background: var(--pn-surface-2);
    transform: translateY(-1px);
}

.btn:active { transform: translateY(0) scale(.99); }

/* Primary action — the one place the accent fills a surface. */
.btn.btn-primary,
.btn.primary,
.btn.blue,
.btn:not(.btn-dark):not(.btn-ghost):not(.btn-small):not(.btn-rounded):not([class*="btn-light"]) {
    background: var(--pn-accent);
    border-color: var(--pn-accent);
    color: #fff;
}

.btn.btn-primary:hover,
.btn.primary:hover,
.btn.blue:hover {
    background: var(--pn-accent-hover);
    border-color: var(--pn-accent-hover);
}

.btn-small { font-size: 12.5px; padding: 6px 13px; }
.btn-rounded { border-radius: var(--pn-r-pill); }

.btn-dark {
    background: var(--pn-ink);
    border-color: var(--pn-ink);
    color: #fff;
}

.btn.btn-disabled,
.btn[disabled] {
    background: var(--pn-surface-2);
    color: var(--pn-ink-3);
    border-color: var(--pn-line);
    pointer-events: none;
}

/* ---------------------------------------------------------------------------
   8. Dialogs
   ------------------------------------------------------------------------ */
x-paper {
    background: var(--pn-surface);
    color: var(--pn-ink);
    border-radius: var(--pn-r-lg);
    border: var(--pn-hairline);
    box-shadow: var(--pn-shadow-3);
    overflow: hidden;
}

x-paper.shadow-2 { box-shadow: var(--pn-shadow-3); }

x-background {
    background: rgba(9, 12, 20, .5);
}

body.dark-theme x-background {
    background: rgba(0, 0, 0, .66);
}

.dialog-title {
    font-family: var(--pn-font-display);
    font-weight: 400;
    font-size: 22px;
    letter-spacing: -.01em;
}

.language-buttons .btn { font-weight: 500; text-align: left; }
.language-buttons hr { background: var(--pn-line); border: 0; height: 1px; }

/* ------------------------------------------------------- language list
   Upstream marks every language label with `z-index: -1` so a click can never
   land on a span instead of its button. That only works while the button has no
   background: the rows are plain `.btn`s, which this layer fills with the
   opaque accent colour, and `.btn` is `position: relative; z-index: auto` — not
   a stacking context — so a negative-z-index child paints *behind* the parent's
   own background and every language name disappears, in both themes.
   The rows are re-indexed (the click target is guaranteed instead with
   `pointer-events: none`, which is what the original trick was really for) and
   restyled as a list rather than 37 full-width accent bars. */
#language-select-dialog .language-buttons {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 0 8px 10px;
    max-height: min(62vh, 520px);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
}

#language-select-dialog .language-buttons > .btn {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: flex-start;
    gap: 0 2px;
    width: 100%;
    min-height: 46px;
    margin: 0;
    padding: 12px 42px 12px 12px;
    background: transparent;
    border: 0;
    border-bottom: var(--pn-hairline);
    border-radius: 0;
    box-shadow: none;
    color: var(--pn-ink);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.35;
    letter-spacing: 0;
    text-transform: none;
    text-align: left;
    transform: none;
}

#language-select-dialog .language-buttons > .btn:first-of-type { border-top: var(--pn-hairline); }
#language-select-dialog .language-buttons > .btn:last-of-type { border-bottom: 0; }

#language-select-dialog .language-buttons > .btn:hover {
    background: var(--pn-surface-2);
    border-color: var(--pn-line);
    transform: none;
}

#language-select-dialog .language-buttons > .btn:active {
    background: var(--pn-surface-3);
    transform: none;
}

/* The ripple overlay would double-up with the row fill. */
#language-select-dialog .language-buttons > .btn::before { content: none; }

#language-select-dialog .language-buttons > .btn > span {
    position: static;
    z-index: auto;
    pointer-events: none;
    color: inherit;
}

#language-select-dialog .language-buttons > .current {
    background: var(--pn-accent-soft);
    color: var(--pn-accent);
    font-weight: 600;
}

#language-select-dialog .language-buttons > .current:after {
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
    color: var(--pn-accent);
    font-size: 17px;
    z-index: 1;
}

/* ------------------------------------------------------- theme picker
   Upstream collapses the two unselected options to `height: 0; opacity: 0` and
   paints a `::before` halo that only exists on hover. A touch device keeps
   `:hover` stuck after a tap, so the halo stays behind the buttons (a pink
   disc in light, magenta in dark) while the collapsed options re-expand into
   it — which is why the light and dark buttons overlap.
   Replaced with a fixed segmented control that renders identically on mouse,
   touch and keyboard, and never depends on hover. */
#theme-wrapper {
    position: relative;
    display: inline-flex;
    /* Pinned to the same box height as the icon buttons so `align-self: center`
       lands on exactly the same pixel row as its siblings. */
    height: 40px;
    box-sizing: border-box;
    /* Upstream `header > *` makes every header child a column flex container
       aligned to flex-start. Both have to be undone here, or the three options
       stack into two rows instead of one segmented control. */
    flex-direction: row;
    align-self: center;
    align-items: center;
    gap: 2px;
    padding: 3px;
    border-radius: var(--pn-r-sm);
    background: var(--pn-surface-2);
    border: var(--pn-hairline);
}

/* The halo, removed in every state and on every pointer type. */
#theme-wrapper::before,
#theme-wrapper:hover::before,
#theme-wrapper:before,
#theme-wrapper:hover:before {
    content: none !important;
    display: none !important;
    background: none !important;
    height: 0 !important;
}

#theme-wrapper > div {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 2px;
}

/* Must outweigh upstream's `#theme-wrapper:not(:hover) .icon-button:not(.selected)`
   (1,3,0) and the coarse-pointer variant, which between them hide the inactive
   options behind a hover-only reveal. */
#theme-wrapper .icon-button,
#theme-wrapper:not(:hover) .icon-button:not(.selected),
#theme-wrapper:hover .icon-button:not(.selected) {
    width: 30px;
    min-width: 30px;
    height: 30px;
    opacity: 1;
    pointer-events: auto;
    border-radius: 7px;
    --icon-size: 17px;
}

#theme-wrapper:not(:hover) .icon-button.selected,
#theme-wrapper:hover .icon-button.selected {
    background: var(--pn-accent-soft);
    color: var(--pn-accent);
}

#theme-wrapper .icon-button::before { content: none; }

@media (max-width: 400px) {
    #theme-wrapper .icon-button,
    #theme-wrapper:not(:hover) .icon-button:not(.selected),
    #theme-wrapper:hover .icon-button:not(.selected) {
        width: 27px;
        min-width: 27px;
        height: 27px;
        --icon-size: 15px;
    }
}

/* Pair / room codes read as data, so they get the mono stack. */
.pn-code,
x-peer .type-ip {
    font-family: var(--pn-font-mono);
    font-variant-numeric: tabular-nums;
    letter-spacing: .12em;
}

/* ---------------------------------------------------------------------------
   9. Brand motion graphic (ident) — animated SVG, transform/opacity only
   ------------------------------------------------------------------------ */
.pn-ident {
    --pn-ident-size: clamp(150px, 26vw, 224px);
    width: var(--pn-ident-size);
    height: var(--pn-ident-size);
    position: relative;
    display: grid;
    place-items: center;
    margin: 0 auto 14px;
}

.pn-ident__ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid var(--pn-line-strong);
    opacity: .7;
    transform: scale(.62);
}

.pn-ident__svg { width: 100%; height: 100%; display: block; overflow: visible; }

/* Beam: the transfer itself. Animates scaleX only. */
.pn-ident__beam {
    transform-box: fill-box;
    transform-origin: left center;
    transform: scaleX(0);
    stroke: var(--pn-accent);
    stroke-linecap: round;
}

/* Node: devices lighting up in sequence. */
.pn-ident__node { opacity: .35; transition: opacity 240ms var(--pn-ease-out); }
.pn-ident__node.is-on { opacity: 1; }

/* Packet: travels the beam — translate only (SMIL-safe, compositor friendly). */
.pn-ident__packet { fill: var(--pn-accent); }

.pn-ident__label {
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--pn-font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--pn-ink-3);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

/* Screen-reader-only text. Used by the cut-reveal, which animates split
   characters and would otherwise read as gibberish. */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Developer credit — About panel, app footer, brand page footer. */
.pn-credit {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 6px 8px;
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--pn-ink-3);
    margin-top: 14px;
    max-width: 46ch;
    text-align: center;
}

.pn-credit--left { justify-content: flex-start; text-align: left; margin-top: 18px; }

.pn-credit a {
    color: var(--pn-ink-2);
    text-decoration: none;
    border-bottom: 1px solid var(--pn-line-strong);
    padding-bottom: 1px;
}

.pn-credit a:hover { color: var(--pn-accent); border-bottom-color: var(--pn-accent); }

.pn-credit__sep { color: var(--pn-line-strong); }

/* Separator and its link travel together, so a wrapped line can never open or
   end on a stranded "·". */
.pn-credit__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.pn-credit__note {
    font-size: 12px;
    color: var(--pn-ink-3);
    margin: 8px 0 0;
    max-width: 46ch;
}

/* Persistent, quiet credit in the app shell. */
.pn-footcredit {
    font-size: 11.5px;
    color: var(--pn-ink-3);
    text-align: center;
    margin: 0 0 14px;
    padding: 0 16px;
}

.pn-footcredit a {
    color: var(--pn-ink-3);
    text-decoration: none;
    border-bottom: 1px solid var(--pn-line);
}

.pn-footcredit a:hover { color: var(--pn-accent); border-bottom-color: var(--pn-accent); }

/* About page brand mark */
.pn-about-mark {
    width: 72px;
    height: 72px;
    border-radius: var(--pn-r-lg);
    display: grid;
    place-items: center;
    background: var(--pn-accent);
    border: var(--pn-hairline);
    color: #fff;
    margin: 0 auto 14px;
}

.pn-about-mark svg { width: 40px; height: 40px; display: block; }

.pn-ident { color: var(--pn-ink-2); }

/* Signalling notice — shown only after repeated socket failures, so it never
   appears on an instance that has a working signalling server. */
.pn-notice {
    position: fixed;
    left: 50%;
    bottom: calc(18px + env(safe-area-inset-bottom, 0px));
    transform: translateX(-50%);
    z-index: var(--pn-z-toast);
    width: min(520px, calc(100% - 24px));
    display: flex;
    gap: 12px;
    align-items: flex-start;
    background: var(--pn-surface);
    border: var(--pn-hairline);
    border-left: 3px solid var(--pn-warn);
    border-radius: var(--pn-r-md);
    box-shadow: var(--pn-shadow-3);
    padding: 14px 16px;
    animation: pn-rise var(--pn-dur-enter) var(--pn-ease-out) both;
}

.pn-notice__body { font-size: 13px; line-height: 1.6; color: var(--pn-ink-2); }
.pn-notice__body strong { display: block; color: var(--pn-ink); font-size: 13.5px; margin-bottom: 3px; }

.pn-notice a { color: var(--pn-accent); }

.pn-notice__close {
    margin-left: auto;
    flex: none;
    background: none;
    border: 0;
    color: var(--pn-ink-3);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    padding: 2px 4px;
}

/* ---------------------------------------------------------------------------
   10. Micro-components added by PairNepal
   ------------------------------------------------------------------------ */
/* Sound toggle — an icon button with an accessible pressed state. */
.pn-sound[aria-pressed="false"] .pn-sound__waves { display: none; }
.pn-sound[aria-pressed="true"] .pn-sound__muted { display: none; }

/* Vertical-cut text reveal (technique ported from 21st.dev "Vertical Cut Reveal").
   The wrapper clips; the inner span travels from 100% to 0. */
.pn-cut {
    display: inline-flex;
    overflow: hidden;
    vertical-align: bottom;
}

.pn-cut > span {
    display: inline-block;
    transform: translateY(100%);
    will-change: transform;
}

.pn-cut.is-in > span {
    transform: translateY(0);
    transition: transform 620ms var(--pn-ease-out);
    transition-delay: var(--pn-cut-delay, 0ms);
}

/* Magnetic element (technique ported from 21st.dev "Magnetic" by ibelick).
   JS writes --pn-mx / --pn-my; the spring is expressed as a short transition. */
.pn-magnetic {
    display: inline-block;
    transform: translate3d(var(--pn-mx, 0px), var(--pn-my, 0px), 0);
    transition: transform 340ms cubic-bezier(.22, .61, .36, 1);
}

.pn-magnetic:active { transition-duration: 120ms; }

/* Scroll-reveal primitive: opt-in, transform+opacity only, no-JS safe
   (elements are visible unless JS adds .pn-reveal-ready). */
.pn-reveal-ready {
    opacity: 0;
    transform: translateY(14px);
}

.pn-reveal-ready.is-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--pn-dur-enter) var(--pn-ease-out),
                transform var(--pn-dur-enter) var(--pn-ease-out);
    transition-delay: var(--pn-reveal-delay, 0ms);
}

/* Skeleton for loading states. Single sweep, small surface. */
.pn-skeleton {
    background-image: linear-gradient(90deg,
        var(--pn-surface-2) 0%, var(--pn-surface-3) 50%, var(--pn-surface-2) 100%);
    background-size: 220% 100%;
    animation: pn-sweep 1.4s linear infinite;
    border-radius: var(--pn-r-sm);
}

/* ---------------------------------------------------------------------------
   11. Keyframes — declared once, all transform/opacity (or small-surface paint)
   ------------------------------------------------------------------------ */
@keyframes pn-presence {
    0%   { opacity: .55; transform: scale(1); }
    60%  { opacity: 0;   transform: scale(1.16); }
    100% { opacity: 0;   transform: scale(1.16); }
}

@keyframes pn-sweep {
    0%   { background-position: 120% 0; }
    100% { background-position: -120% 0; }
}

@keyframes pn-spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

@keyframes pn-rise {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------------------------------------------------------------------------
   12. Reduced motion — every non-essential animation resolves to its end state
   ------------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
        scroll-behavior: auto !important;
    }

    x-peer:not(.ws-peer) .icon-wrapper .circle { animation: none; opacity: .45; transform: none; }

    .pn-cut > span { transform: none; }
    .pn-reveal-ready { opacity: 1; transform: none; }
    .pn-magnetic { transform: none !important; }
    .pn-skeleton { animation: none; background: var(--pn-surface-2); }
}

/* ---------------------------------------------------------------------------
   13. Small screens
   ------------------------------------------------------------------------ */
/* Upstream pins the header to a single 64px row and reveals wrapped controls
   through the expand chevron. Adding the brand lockup pushes the brand itself
   onto that wrapped row, where `overflow: hidden` clips it away. On small
   screens the header is allowed to grow instead, so every control stays
   visible and tappable. */
@media (max-width: 760px) {
    /* Upstream clips the wrapped row with `header.overflow-hidden` and pins the
       height with `header:not(.overflow-expanded)` — both outrank a bare
       `header` selector, so the same specificity is required here. */
    header,
    header.overflow-hidden {
        overflow: visible;
        align-items: center;
    }

    header:not(.overflow-expanded) {
        height: auto;
        min-height: 64px;
    }
}

@media (max-width: 620px) {
    header { padding: 12px 12px; }
    #center { padding: 4px 10px 0; }
    footer { margin: 0 12px 12px; }
    x-peer .icon-wrapper { width: 84px; height: 84px; }
    x-peer .name { max-width: 120px; font-size: 13px; }
    x-peer .progress { width: 84px; }
}

/* ===========================================================================
   9. Homepage editorial tail
   ---------------------------------------------------------------------------
   The app is pinned to exactly one viewport so it behaves like an application
   rather than a document. Everything below it is what a crawler actually has
   to read, so the document is allowed to scroll from here down. The shell
   supplies the same definite height <body> used to, which is why the app's
   own internal layout is unaffected by the change.
   ========================================================================= */

/* The root must not be a flex container. WebKit mis-sizes a flex root and the
   document then refuses to scroll — which is why this page scrolled on a phone
   but not on a laptop. The flex context the app needs is supplied by
   .pn-app-shell instead, so <header> and <#center> lay out exactly as before. */
html {
    display: block;
    height: auto;
    min-height: 100%;
    /* `width: 100vw` upstream includes the scrollbar, which would introduce a
       horizontal overflow the moment this page can scroll. */
    width: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

body {
    display: block;
    height: auto;
    min-height: 0;
    width: 100%;
    overflow: visible;
}

.pn-app-shell {
    display: flex;
    flex-direction: column;
    flex: 0 0 auto;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 520px;
    overflow: hidden;
}

.pn-tail {
    background: var(--pn-canvas);
    border-top: var(--pn-hairline);
    padding: 76px 24px 100px;
}

.pn-tail__wrap {
    max-width: 720px;
    margin: 0 auto;
    color: var(--pn-ink-2);
    font-size: 16px;
    line-height: 1.65;
}

.pn-tail__kicker {
    font-family: var(--pn-font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--pn-accent);
    margin: 0 0 14px;
}

.pn-tail h2 {
    font-family: var(--pn-font-display);
    font-size: clamp(26px, 3.4vw, 34px);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -.015em;
    color: var(--pn-ink);
    margin: 56px 0 14px;
    max-width: 24ch;
    text-wrap: balance;
}

.pn-tail h2:first-of-type { margin-top: 0; }

.pn-tail h3 {
    font-family: var(--pn-font-ui);
    font-size: 17px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--pn-ink);
    margin: 0 0 6px;
}

.pn-tail p { margin: 0 0 16px; max-width: 68ch; }

.pn-tail__lede {
    font-size: 18px;
    line-height: 1.6;
}

.pn-tail a {
    color: var(--pn-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: rgba(193, 18, 53, .34);
    transition: text-decoration-color var(--pn-dur-feedback) var(--pn-ease-out);
}

.pn-tail a:hover,
.pn-tail a:focus-visible { text-decoration-color: var(--pn-accent); }

/* --- key numbers ---------------------------------------------------------- */
.pn-tail__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--pn-line);
    border: var(--pn-hairline);
    border-radius: var(--pn-r-md);
    overflow: hidden;
    margin: 30px 0 10px;
}

.pn-tail__stats > div {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: var(--pn-surface);
    padding: 18px 16px;
}

.pn-tail__stats b {
    font-family: var(--pn-font-display);
    font-size: 32px;
    font-weight: 400;
    line-height: 1;
    color: var(--pn-accent);
    font-variant-numeric: tabular-nums;
}

.pn-tail__stats span {
    font-size: 12.5px;
    line-height: 1.35;
    color: var(--pn-ink-3);
}

/* --- three steps ---------------------------------------------------------- */
.pn-tail__steps {
    list-style: none;
    margin: 4px 0 0;
    padding: 0;
    counter-reset: pn-step;
}

.pn-tail__steps li {
    position: relative;
    padding: 0 0 28px 62px;
    counter-increment: pn-step;
}

.pn-tail__steps li::before {
    content: counter(pn-step);
    position: absolute;
    left: 0;
    top: 0;
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--pn-accent-soft);
    color: var(--pn-accent);
    font-family: var(--pn-font-mono);
    font-size: 14px;
    font-weight: 600;
}

/* the connecting rule between the steps */
.pn-tail__steps li::after {
    content: "";
    position: absolute;
    left: 19px;
    top: 46px;
    bottom: 4px;
    width: 1px;
    background: var(--pn-line);
}

.pn-tail__steps li:last-child { padding-bottom: 0; }
.pn-tail__steps li:last-child::after { display: none; }

.pn-tail__list { margin: 0 0 16px; padding-left: 20px; }
.pn-tail__list li { margin-bottom: 8px; }
.pn-tail__list b { color: var(--pn-ink); }

/* --- comparison -----------------------------------------------------------
   Five columns cannot fit a 390px screen. The table scrolls inside its own
   container so the last column stays reachable, instead of being clipped by
   the page's `overflow-x: hidden`. */
.pn-tail__scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 20px 0 10px;
}

.pn-tail__scroll .pn-tail__table { margin: 0; }

.pn-tail__table {
    width: 100%;
    min-width: 520px;
    border-collapse: collapse;
    font-size: 14px;
    margin: 20px 0 10px;
}

.pn-tail__table th,
.pn-tail__table td {
    text-align: left;
    padding: 11px 12px;
    border-bottom: var(--pn-hairline);
    vertical-align: top;
}

.pn-tail__table thead th {
    font-family: var(--pn-font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--pn-ink-3);
    border-bottom: 1px solid var(--pn-line);
}

.pn-tail__table tbody th {
    font-weight: 600;
    color: var(--pn-ink);
}

.pn-tail__table .is-hero td,
.pn-tail__table .is-hero th {
    background: var(--pn-accent-soft);
    color: var(--pn-ink);
}

/* --- questions ------------------------------------------------------------ */
.pn-tail__faq {
    border-bottom: var(--pn-hairline);
    padding: 15px 0;
}

.pn-tail__faq summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    list-style: none;
    font-size: 16.5px;
    font-weight: 600;
    color: var(--pn-ink);
}

.pn-tail__faq summary::-webkit-details-marker { display: none; }

.pn-tail__faq summary::after {
    content: "+";
    flex: none;
    font-family: var(--pn-font-mono);
    font-size: 20px;
    line-height: 1;
    color: var(--pn-accent);
    transition: transform var(--pn-dur-feedback) var(--pn-ease-out);
}

.pn-tail__faq[open] summary::after {
    content: "\2013";
}

.pn-tail__faq p { margin: 14px 0 2px; }

.pn-tail__close {
    margin: 52px 0 0;
    padding-top: 24px;
    border-top: var(--pn-hairline);
    font-size: 15px;
    color: var(--pn-ink-3);
}

@media (max-width: 700px) {
    .pn-tail { padding: 52px 18px 76px; }
    .pn-tail__stats { grid-template-columns: repeat(2, 1fr); }
    .pn-tail__table { font-size: 13px; }
    .pn-tail__table th,
    .pn-tail__table td { padding: 9px 8px; }
    .pn-tail__steps li { padding-left: 52px; }
    .pn-tail__close { font-size: 14px; }
}

/* =============================================================================
   13. Boot loader
   The app's own chrome carries `opacity: 0` until scripts/main.js has awaited
   the signalling socket, so before this existed the first painted frame was an
   empty canvas. Styled entirely from this sheet, which is now linked in <head>,
   so it is on screen from the first frame.
   ========================================================================== */

#pn-boot {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: grid;
    place-items: center;
    background: rgb(var(--bg-color));
    transition: opacity 280ms var(--pn-ease-out),
                visibility 0s linear 280ms;
}

#pn-boot__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

#pn-boot__mark {
    width: 54px;
    height: 54px;
    color: var(--pn-accent);
    animation: pn-boot-pulse 1.7s var(--pn-ease-in-out) infinite;
}

#pn-boot__mark svg { display: block; width: 100%; height: 100%; }

#pn-boot__label {
    font-family: var(--pn-font-display);
    font-size: 21px;
    letter-spacing: -.015em;
    color: var(--pn-ink);
}

.pn-boot__sr {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@keyframes pn-boot-pulse {
    0%, 100% { opacity: .5; transform: scale(.94); }
    50%      { opacity: 1;   transform: scale(1); }
}

body.pn-ready #pn-boot {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
    #pn-boot__mark { animation: none; opacity: .85; transform: none; }
}

/* =============================================================================
   14. Header alignment
   Upstream `header > *` pins every child to `flex-start`, and
   `header > * { flex-direction: column }` also turns the brand lockup into a
   stacked column while the brand page renders it as a row. The two disagreeing
   cross-axis alignments are what left the theme switcher sitting 23px below the
   icon buttons on a laptop: the brand was 86px tall, so it defined the flex
   line, the icons stayed at its top edge, and the centre-aligned theme control
   was centred on 86px instead of on the icons.
   ========================================================================== */

header > * { align-self: center; }

.pn-brand {
    /* `header > *` makes this a column; the lockup is a row everywhere else. */
    flex-direction: row;
    align-items: center;
    align-self: center;
    flex: 0 0 auto;
}

/* =============================================================================
   15. About panel: viewport-locked, never scrollable
   `#about` is `.full` (position: absolute), so with the document now scrollable
   the panel anchored to the *document* rather than the viewport and could be
   scrolled away from. Pinned to the viewport while open, and the page behind it
   is locked so the panel cannot be scrolled either.
   ========================================================================== */

#about {
    position: fixed;
    inset: 0;
    overflow: hidden;
}

html:has(#about:target),
body:has(#about:target) {
    overflow: hidden;
    overscroll-behavior: none;
}

/* Short viewports: compact the panel rather than let it overflow, since it is
   deliberately not scrollable. */
@media (max-height: 660px) {
    #about .pn-about-mark { width: 56px; height: 56px; margin-bottom: 12px; }
    #about .pn-about-mark svg { width: 28px; height: 28px; }
    #about .pn-about-name { font-size: 26px; }
    #about .title-wrapper { margin-bottom: 10px; }
    #about .pn-about-claim { margin-bottom: 15px; }
    #about .pn-credit { margin-top: 14px; }
    #about .pn-about-links { margin-top: 15px; }
}

@media (max-height: 520px) {
    #about .pn-about-mark { display: none; }
    #about .pn-about-claim { font-size: 14px; }
    #about .pn-about-links { margin-top: 12px; }
}