/* FractalOS landing page: an EGA product sheet for a computer in a tab.
   Flat sixteen-colour hardware, a green phosphor terminal, a printed quick-start card.
   No web fonts, no external images, no trackers. */

:root {
    --ega-black: #000000;
    --ega-blue: #0000aa;
    --ega-green: #00aa00;
    --ega-cyan: #00aaaa;
    --ega-red: #aa0000;
    --ega-lgray: #aaaaaa;
    --ega-dgray: #555555;
    --ega-bgreen: #55ff55;
    --ega-bcyan: #55ffff;
    --ega-bmagenta: #ff55ff;
    --ega-yellow: #ffff55;
    --ega-white: #ffffff;

    --bg: var(--ega-black);
    --bg-dither: #001006;
    --panel: #040704;
    --panel-2: #061009;
    --ink: #b9b9b9;
    --ink-bright: #e8e8e8;
    --muted: #7d8b80;
    --line: #1c4a2b;
    --line-bright: #2a6a3b;
    --green: var(--ega-bgreen);
    --cyan: var(--ega-bcyan);
    --yellow: var(--ega-yellow);
    --magenta: var(--ega-bmagenta);
    --red: #ff5555;
    --paper: #f4f1e6;
    --paper-ink: #141810;
    --paper-muted: #5f6358;
    --paper-line: #cfc7b3;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Mono", "DejaVu Sans Mono", "Liberation Mono", "Courier New", monospace;
    --wrap: 80rem;
    --gutter: clamp(1rem, 3vw, 2rem);
    color-scheme: dark;
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: var(--bg);
    background-image: repeating-conic-gradient(var(--bg) 0% 25%, var(--bg-dither) 0% 50%);
    background-size: 4px 4px;
    background-attachment: fixed;
    color: var(--ink);
    font-family: var(--sans);
    font-size: .95rem;
    line-height: 1.6;
}

/* Monospace retro UI chrome */
h1, h2, h3, h4,
.brand,
.brand-name,
.brand-ver,
.brand-mark,
.nav,
.contents,
.win-bar,
.kicker,
.sec-kicker,
.meta,
.btn,
.copy-btn,
.spec-strip,
.spec-table,
.term-bar,
.term-foot,
.tag,
.badge,
.cap-num,
.quick-head,
.way-label,
.quick-foot-label,
.arch-label,
.arch-name,
.arch-link,
.arch-storage,
.glossary dt,
.foot-brand,
.foot-links,
.foot-bottom,
code,
kbd,
pre {
    font-family: var(--mono);
}

::selection { background: var(--green); color: var(--ega-black); }

a { color: var(--cyan); }
a:hover { background: var(--ega-red); color: var(--ega-white); }
a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 2px dashed var(--yellow);
    outline-offset: 3px;
}

code, kbd, pre { font-family: var(--mono); }
code { color: var(--ega-white); }
p code, li code, dd code { background: #0a150c; border: 1px solid #234c2f; padding: 0 .2rem; }

.skip {
    position: absolute;
    left: -999px;
    top: 0;
    z-index: 200;
    padding: .55rem 1rem;
    background: var(--ega-red);
    color: var(--ega-white);
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
}
.skip:focus { left: var(--gutter); }

.wrap {
    width: 100%;
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

/* ---------- The pull-down menu bar ---------- */

.site-head {
    position: sticky;
    top: 0;
    z-index: 80;
    background: var(--ega-lgray);
    color: var(--ega-black);
    border-top: 3px solid var(--ega-green);
    border-bottom: 4px solid var(--ega-black);
}

.head-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem 1rem;
    min-height: 2.9rem;
    padding-block: .2rem;
    flex-wrap: wrap;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .15rem .25rem;
    color: var(--ega-black);
    text-decoration: none;
}
.brand:hover { background: var(--ega-black); color: var(--ega-white); }

.brand-mark {
    display: grid;
    place-items: center;
    width: 1.55rem;
    height: 1.55rem;
    background: var(--ega-black);
    color: var(--green);
    font-size: .78rem;
    font-weight: 700;
    line-height: 1;
    box-shadow: 2px 2px 0 var(--ega-dgray);
}
.brand:hover .brand-mark { background: var(--ega-white); color: var(--ega-black); }

.brand-name {
    font-size: .88rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.brand-name span { color: var(--ega-red); }
.brand:hover .brand-name span { color: var(--yellow); }

.brand-ver {
    color: #333333;
    font-size: .66rem;
    letter-spacing: .06em;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: .05rem;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}
.nav a { padding: .28rem .48rem; color: var(--ega-black); text-decoration: none; }
.nav a:hover { background: var(--ega-black); color: var(--ega-white); }

/* ---------- Beveled buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    padding: .58rem .85rem;
    border-top: 2px solid var(--ega-white);
    border-left: 2px solid var(--ega-white);
    border-right: 2px solid var(--ega-dgray);
    border-bottom: 2px solid var(--ega-dgray);
    background: var(--ega-lgray);
    box-shadow: 3px 3px 0 var(--ega-black), 0 0 0 1px var(--ega-black);
    color: var(--ega-black);
    font: 700 .76rem/1.2 var(--mono);
    letter-spacing: .05em;
    text-decoration: none;
    text-transform: uppercase;
}
.btn:hover { background: var(--yellow); color: var(--ega-black); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ega-black), 0 0 0 1px var(--ega-black); }

.btn.primary {
    background: var(--ega-bgreen);
    border-top-color: var(--ega-white);
    border-left-color: var(--ega-white);
    border-right-color: #007700;
    border-bottom-color: #007700;
}
.btn.primary:hover { background: var(--yellow); color: var(--ega-black); }

.head-cta { padding: .4rem .65rem; font-size: .66rem; box-shadow: 2px 2px 0 var(--ega-black), 0 0 0 1px var(--ega-black); }

/* ---------- The page and the index rail ---------- */

.page { padding: clamp(1rem, 2.5vw, 1.8rem) var(--gutter) clamp(2rem, 5vw, 3rem); }

.page-grid {
    display: grid;
    grid-template-columns: 11.5rem minmax(0, 1fr);
    gap: clamp(1.25rem, 3vw, 2.4rem);
    max-width: var(--wrap);
    margin: 0 auto;
    align-items: start;
}

.contents {
    position: sticky;
    top: 4.4rem;
    display: flex;
    flex-direction: column;
    gap: .08rem;
    padding: .7rem .55rem;
    border: 1px solid var(--line);
    background: rgba(0, 0, 0, .92);
    box-shadow: 4px 4px 0 var(--ega-black);
}

.contents-label {
    margin: 0 0 .45rem;
    padding: 0 .45rem;
    color: var(--green);
    font-size: .55rem;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}

.contents a {
    display: flex;
    gap: .5rem;
    padding: .28rem .45rem;
    border-left: 2px solid transparent;
    color: #8f9d92;
    font-size: .66rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-decoration: none;
    text-transform: uppercase;
}
.contents a span { color: #6d9878; }
.contents a:hover { background: var(--panel-2); color: var(--ega-white); }
.contents a.active { border-left-color: var(--green); background: var(--panel-2); color: var(--ega-white); }
.contents a.active span { color: var(--green); }

.contents-status {
    display: flex;
    align-items: center;
    gap: .4rem;
    margin: 1rem 0 0;
    padding: .55rem .45rem 0;
    border-top: 1px dashed var(--line);
    color: var(--muted);
    font-size: .5rem;
    letter-spacing: .1em;
}
.contents-status span {
    width: 6px;
    height: 6px;
    background: var(--green);
    border: 1px solid var(--ega-black);
    animation: pulse 2s steps(2, start) infinite;
}

.stream { min-width: 0; }

/* ---------- Window panels ---------- */

.panel {
    margin-bottom: clamp(1.1rem, 2.4vw, 1.8rem);
    border: 1px solid var(--line);
    background: var(--panel);
    box-shadow: 6px 6px 0 var(--ega-black);
    scroll-margin-top: 5rem;
}

.win-bar {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: .6rem;
    padding: .34rem .62rem;
    border-bottom: 2px solid var(--ega-black);
    background: var(--ega-lgray);
    color: var(--ega-black);
    font-size: .58rem;
    font-weight: 700;
    letter-spacing: .07em;
    line-height: 1.35;
    text-transform: uppercase;
}
.win-bar span:nth-child(2) { color: #333333; text-align: right; }
.win-bar span:last-child { text-align: right; }

.panel-body { padding: clamp(1.1rem, 3vw, 2.5rem); }

.sec-kicker {
    display: flex;
    align-items: center;
    gap: .55rem;
    margin: 0 0 .6rem;
    color: var(--green);
    font-size: .57rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
}
.sec-kicker span {
    display: inline-block;
    padding: .08rem .3rem;
    background: var(--green);
    color: var(--ega-black);
    letter-spacing: .05em;
}

h2 {
    margin: 0 0 .75rem;
    color: var(--ega-white);
    font-size: clamp(1.45rem, 3.1vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -.02em;
    line-height: 1.1;
    text-wrap: balance;
}

h3 {
    margin: 0 0 .4rem;
    color: var(--ega-white);
    font-size: 1rem;
    line-height: 1.35;
}

.lede {
    max-width: 64ch;
    margin: 0 0 1.5rem;
    color: #cfcfcf;
    font-size: 1rem;
    line-height: 1.65;
}

.prose p {
    max-width: 66ch;
    margin: 0 0 1rem;
    color: var(--ink);
    line-height: 1.68;
}
.prose p:last-child { margin-bottom: 0; }

.meta {
    margin: .9rem 0 0;
    color: var(--muted);
    font-size: .58rem;
    letter-spacing: .1em;
    text-transform: uppercase;
}
.meta span { color: var(--green); }

.mini-title {
    margin: 2rem 0 .65rem;
    color: var(--green);
    font-size: .58rem;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}
.mini-title::before { content: "// "; color: var(--line-bright); }

/* ---------- Hero ---------- */

.hero { border-color: var(--line-bright); }

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(18rem, .88fr);
    gap: clamp(1.4rem, 3.5vw, 3rem);
    align-items: center;
}

.hero-copy { min-width: 0; }

.kicker {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .45rem;
    margin: 0 0 .75rem;
    color: var(--green);
    font-size: .56rem;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}
.kicker-dot { width: 7px; height: 7px; background: var(--green); border: 1px solid var(--ega-black); }
.kicker .slash { color: var(--line-bright); }

.hero h1 {
    margin: 0 0 1rem;
    color: var(--ega-white);
    font-size: clamp(1.7rem, 4.2vw, 3.6rem);
    font-weight: 700;
    letter-spacing: -.035em;
    line-height: .99;
    text-transform: uppercase;
    text-wrap: balance;
}
.hero h1 .accent { color: var(--green); }

.hero .lede { max-width: 54ch; margin-bottom: 1.15rem; }

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    margin: 0 0 .9rem;
}

.callout {
    max-width: 54ch;
    margin: 1.15rem 0 0;
    padding: .65rem .8rem;
    border-left: 3px solid var(--yellow);
    background: rgba(255, 255, 85, .055);
    color: #c9c9b6;
    font-size: .8rem;
    line-height: 1.6;
}
.callout b { color: var(--yellow); }
.callout code { color: var(--yellow); background: transparent; border: 0; padding: 0; }

.hero-side { min-width: 0; }

.terminal {
    border: 1px solid var(--line-bright);
    background: var(--ega-black);
    box-shadow: 8px 8px 0 var(--ega-black), 0 0 0 1px #0b2413;
}

.term-bar {
    display: flex;
    justify-content: space-between;
    gap: .5rem;
    padding: .32rem .55rem;
    border-bottom: 2px solid var(--ega-black);
    background: var(--ega-lgray);
    color: var(--ega-black);
    font-size: .54rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.term-bar span:last-child { color: #333333; }

.term-body pre {
    margin: 0;
    padding: .9rem .8rem 1rem;
    overflow-x: auto;
    color: var(--ink);
    font-size: clamp(.66rem, 1.1vw, .8rem);
    line-height: 1.55;
}

.term-foot {
    display: flex;
    justify-content: space-between;
    gap: .5rem;
    padding: .3rem .55rem;
    border-top: 1px dashed var(--line);
    color: var(--muted);
    font-size: .48rem;
    letter-spacing: .09em;
    text-transform: uppercase;
}
.term-foot span:last-child { color: var(--green); }

.term-caption {
    margin: .7rem 0 0;
    color: var(--muted);
    font-size: .62rem;
    line-height: 1.55;
}

.t-dim { color: #6d796f; }
.t-prompt { color: var(--green); }
.t-cmd { color: var(--ega-white); }
.t-out { color: var(--ink); }
.t-ok { color: var(--green); }
.t-warn { color: var(--yellow); }
.t-bad { color: var(--red); }

.t-cursor,
.boot-cursor {
    display: inline-block;
    width: .58em;
    height: 1em;
    background: var(--green);
    vertical-align: -.12em;
    animation: blink 1s steps(2, start) infinite;
}

/* ---------- The at-a-glance strip ---------- */

.spec-strip {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    margin: 0;
    border-top: 1px solid var(--line);
}
.spec-strip > div {
    min-width: 0;
    padding: .65rem .7rem;
    border-right: 1px solid var(--line);
}
.spec-strip > div:last-child { border-right: 0; }
.spec-strip dt {
    margin: 0 0 .15rem;
    color: var(--muted);
    font-size: .48rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.spec-strip dd {
    margin: 0;
    color: var(--ega-white);
    font-size: .68rem;
    line-height: 1.35;
}

/* ---------- What it is ---------- */

.split {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(17rem, .65fr);
    gap: clamp(1.2rem, 3vw, 2.2rem);
    align-items: start;
    margin-bottom: 1.5rem;
}

.side-note {
    border: 1px solid var(--line-bright);
    background: var(--panel-2);
    padding: .9rem 1rem 1rem;
    box-shadow: 4px 4px 0 var(--ega-black);
}
.side-label {
    margin: 0 0 .65rem;
    color: var(--yellow);
    font-size: .55rem;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}

.steps { margin: 0; padding: 0; list-style: none; }
.steps li {
    display: grid;
    grid-template-columns: 1.8rem 1fr;
    gap: .45rem;
    padding: .55rem 0;
    border-bottom: 1px dashed var(--line);
    color: var(--ink);
    font-size: .78rem;
    line-height: 1.55;
}
.steps li:last-child { border-bottom: 0; padding-bottom: 0; }
.steps li > span { color: var(--green); font-size: .6rem; font-weight: 700; padding-top: .2rem; }
.steps b { color: var(--ega-white); }

.not-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .6rem;
}
.not {
    padding: .6rem .75rem;
    border-left: 3px solid var(--ega-red);
    background: rgba(170, 0, 0, .07);
    color: #c9b8b8;
    font-size: .78rem;
    line-height: 1.55;
}
.not b { display: block; color: var(--red); }

/* ---------- Tour ---------- */

.noscript-note {
    margin: 0 0 1rem;
    padding: .55rem .7rem;
    border: 1px dashed var(--yellow);
    color: var(--yellow);
    font-size: .78rem;
}

.tour-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: .25rem;
    margin: 0 0 .65rem;
}
.tour-tab {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .5rem .75rem;
    border: 1px solid var(--line-bright);
    background: #020502;
    color: #a9b8ad;
    font: 700 .68rem/1.2 var(--mono);
    letter-spacing: .06em;
    text-transform: uppercase;
    cursor: pointer;
}
.tour-tab span { color: var(--green); font-size: .56rem; }
.tour-tab:hover { background: #0a1a0e; color: var(--ega-white); }
.tour-tab[aria-selected="true"] {
    background: var(--green);
    border-color: var(--green);
    color: var(--ega-black);
}
.tour-tab[aria-selected="true"] span { color: var(--ega-black); }

.tour-panel {
    border: 1px solid var(--line-bright);
    background: var(--ega-black);
}
.tour-panel[hidden] { display: none; }

.tour-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: .4rem;
    padding: .4rem .65rem;
    border-bottom: 1px solid var(--line);
    background: var(--panel-2);
    color: var(--muted);
    font-size: .52rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.badge {
    display: inline-block;
    padding: .05rem .3rem;
    border: 1px solid currentColor;
    font-size: .5rem;
    font-weight: 700;
    letter-spacing: .08em;
}
.badge.real { color: var(--green); }
.badge.example { color: var(--yellow); }

.terminal-pre {
    margin: 0;
    padding: 1rem;
    min-height: 16rem;
    overflow-x: auto;
    color: var(--ink);
    font-size: .78rem;
    line-height: 1.6;
}
.tour-copy {
    margin: 0;
    padding: .8rem 1rem;
    border-top: 1px dashed var(--line);
    color: var(--ink);
    font-size: .82rem;
    line-height: 1.65;
    max-width: 78ch;
}

/* ---------- Capabilities ---------- */

.cap-list { border-top: 1px solid var(--line); }

.cap {
    display: grid;
    grid-template-columns: 2.2rem minmax(0, 1fr) minmax(16rem, 21rem);
    gap: .8rem 1rem;
    padding: 1.05rem 0;
    border-bottom: 1px dashed var(--line);
}
.cap:last-child { border-bottom: 0; padding-bottom: 0; }
.cap-num {
    padding-top: .18rem;
    color: var(--green);
    font-size: .62rem;
    font-weight: 700;
    letter-spacing: .06em;
}
.cap-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: .35rem .6rem;
    margin-bottom: .15rem;
}
.cap h3 { margin: 0; font-size: .98rem; }
.cap-text p { margin: 0; color: var(--ink); font-size: .82rem; line-height: 1.65; max-width: 62ch; }

.tag {
    padding: .05rem .3rem;
    border: 1px solid var(--line-bright);
    color: #8ed69e;
    font-size: .48rem;
    font-weight: 700;
    letter-spacing: .08em;
    white-space: nowrap;
}

.cap-code {
    margin: 0;
    padding: .55rem .7rem;
    border-left: 2px solid var(--line-bright);
    background: var(--ega-black);
    color: var(--ink);
    font-size: .65rem;
    line-height: 1.55;
    overflow-x: auto;
}
.cap-code code { color: inherit; }
.cap:nth-child(2) .cap-num { color: var(--cyan); }
.cap:nth-child(2) .cap-code { border-left-color: var(--ega-cyan); }
.cap:nth-child(3) .cap-num { color: var(--yellow); }
.cap:nth-child(3) .cap-code { border-left-color: var(--ega-yellow); }
.cap:nth-child(4) .cap-num { color: var(--magenta); }
.cap:nth-child(4) .cap-code { border-left-color: var(--ega-bmagenta); }
.cap:nth-child(6) .cap-num { color: var(--red); }
.cap:nth-child(6) .cap-code { border-left-color: var(--ega-red); }

/* ---------- Who it is for ---------- */

.audience {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .8rem;
    margin: 1.2rem 0;
}
.aud {
    padding: .9rem 1rem;
    border: 1px solid var(--line-bright);
    background: var(--panel-2);
}
.aud.not-for { border-color: #5b2020; background: #100404; }
.aud-label {
    margin: 0 0 .6rem;
    color: var(--green);
    font-size: .56rem;
    font-weight: 700;
    letter-spacing: .12em;
}
.aud.not-for .aud-label { color: var(--red); }
.aud ul { margin: 0; padding: 0; list-style: none; }
.aud li {
    position: relative;
    padding: .32rem 0 .32rem 1.15rem;
    border-bottom: 1px dashed var(--line);
    color: var(--ink);
    font-size: .8rem;
    line-height: 1.55;
}
.aud li:last-child { border-bottom: 0; }
.aud li::before {
    position: absolute;
    left: 0;
    top: .32rem;
    color: var(--green);
    content: "+";
    font-weight: 700;
}
.aud.not-for li::before { color: var(--red); content: "−"; }

.pullquote {
    max-width: 66ch;
    margin: 1.5rem 0 0;
    padding: 1rem 0 1rem 1rem;
    border-left: 4px solid var(--yellow);
    color: var(--ega-white);
    font-size: clamp(.92rem, 1.6vw, 1.08rem);
    line-height: 1.6;
}

/* ---------- The printed quick-start card ---------- */

.run {
    margin: clamp(1.5rem, 3vw, 2.5rem) 0 clamp(1.2rem, 2.5vw, 2rem);
    scroll-margin-top: 5rem;
}
.run .lede { color: var(--ink); }

.quick-card {
    margin-top: 1rem;
    border: 2px solid var(--ega-black);
    background: var(--paper);
    box-shadow: 10px 10px 0 var(--ega-black);
    color: var(--paper-ink);
}

.quick-head {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: .3rem .8rem;
    padding: .45rem .8rem;
    background: var(--ega-black);
    color: var(--paper);
    font-size: .54rem;
    font-weight: 700;
    letter-spacing: .09em;
}
.quick-head span:last-child { color: var(--ega-lgray); }

.quick-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    padding: 1.2rem;
}

.way { min-width: 0; border-top: 3px solid var(--ega-black); padding-top: .65rem; }
.way-label {
    margin: 0 0 .2rem;
    color: var(--paper-muted);
    font-size: .5rem;
    font-weight: 700;
    letter-spacing: .11em;
}
.way h3 { margin: 0 0 .45rem; color: var(--paper-ink); font-size: 1rem; }
.way p { margin: 0 0 .55rem; color: #33382f; font-size: .78rem; line-height: 1.55; }
.way-note { color: var(--paper-muted) !important; font-size: .68rem !important; }

.copy-block { position: relative; margin: .6rem 0; }
.copy-block pre {
    margin: 0;
    padding: .7rem 3.2rem .7rem .7rem;
    border: 1px solid var(--paper-line);
    background: #e8e3d4;
    color: #1b2118;
    font-size: .64rem;
    line-height: 1.6;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}
.copy-block code { color: inherit; }

.copy-btn {
    position: absolute;
    top: .35rem;
    right: .35rem;
    padding: .2rem .35rem;
    border: 1px solid var(--ega-black);
    background: var(--ega-black);
    color: var(--paper);
    font: 700 .48rem/1.2 var(--mono);
    letter-spacing: .06em;
    text-transform: uppercase;
    cursor: pointer;
}
.copy-btn:hover { background: var(--ega-red); color: var(--ega-white); }

.quick-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.2rem;
    border-top: 2px dashed #b9b09b;
}
.quick-foot-label {
    margin: 0 0 .2rem;
    color: var(--ega-red);
    font-size: .52rem;
    font-weight: 700;
    letter-spacing: .1em;
}
.quick-foot p:last-child { margin: 0; color: #33382f; font-size: .72rem; line-height: 1.55; }

/* ---------- Under the hood ---------- */

.arch {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: .8rem;
    margin: 1.3rem 0 1.4rem;
    padding: 1rem;
    border: 1px solid var(--line-bright);
    background: var(--ega-black);
}
.arch-box {
    min-width: 0;
    padding: .75rem .85rem;
    border: 1px solid var(--line-bright);
    background: var(--panel-2);
}
.arch-label {
    margin: 0 0 .3rem;
    color: var(--green);
    font-size: .5rem;
    font-weight: 700;
    letter-spacing: .1em;
}
.arch-name { margin: 0 0 .35rem; color: var(--ega-white); font-size: .82rem; font-weight: 700; }
.arch-list { margin: 0; color: var(--muted); font-size: .66rem; line-height: 1.55; }
.arch-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .2rem;
    color: var(--yellow);
    font-size: .5rem;
    letter-spacing: .04em;
    white-space: nowrap;
}
.arch-storage {
    grid-column: 1 / -1;
    padding: .45rem .6rem;
    border-top: 1px dashed var(--line);
    color: var(--muted);
    font-size: .56rem;
    letter-spacing: .05em;
    text-transform: uppercase;
}
.arch-storage span { color: var(--green); }

.inside-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(16rem, .9fr);
    gap: 1.2rem;
    align-items: start;
    margin-bottom: 1.4rem;
}
.inside-grid h3 { margin-bottom: .4rem; }
.inside-grid p { margin: 0; color: var(--ink); font-size: .84rem; line-height: 1.65; }

.code-block {
    margin: 0;
    padding: .8rem;
    border: 1px solid var(--line-bright);
    background: var(--ega-black);
    color: var(--green);
    font-size: .72rem;
    line-height: 1.6;
    overflow-x: auto;
}
.code-block code { color: inherit; }

.spec-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
    margin: 1.2rem 0 0;
    border-top: 1px solid var(--line);
}
.spec-table > div {
    display: grid;
    grid-template-columns: 6.2rem 1fr;
    gap: .4rem;
    padding: .5rem 0;
    border-bottom: 1px dashed var(--line);
    font-size: .74rem;
    line-height: 1.55;
}
.spec-table dt { color: var(--green); font-size: .6rem; letter-spacing: .06em; text-transform: uppercase; }
.spec-table dd { margin: 0; color: var(--ink); }
.spec-table dd code { font-size: .94em; }

.glossary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.4rem;
    margin: 0;
    border-top: 1px dashed var(--line);
}
.glossary > div { padding: .55rem 0; border-bottom: 1px dashed var(--line); }
.glossary dt { color: var(--ega-white); font-size: .7rem; font-weight: 700; }
.glossary dd { margin: .1rem 0 0; color: var(--muted); font-size: .72rem; line-height: 1.55; }

/* ---------- FAQ ---------- */

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .55rem;
}
.faq-grid details {
    border: 1px solid var(--line);
    background: #020502;
}
.faq-grid details[open] { border-color: var(--line-bright); }
.faq-grid summary {
    position: relative;
    padding: .7rem 2rem .7rem .8rem;
    color: var(--ega-white);
    font-size: .82rem;
    font-weight: 700;
    line-height: 1.45;
    cursor: pointer;
    list-style: none;
}
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary::after {
    position: absolute;
    right: .8rem;
    top: .65rem;
    color: var(--green);
    content: "+";
    font-size: .9rem;
}
.faq-grid details[open] summary { background: var(--panel-2); border-bottom: 1px dashed var(--line); }
.faq-grid details[open] summary::after { content: "−"; }
.faq-body { padding: .1rem .8rem .75rem; }
.faq-body p { margin: .35rem 0 0; color: var(--ink); font-size: .78rem; line-height: 1.65; }

/* ---------- Final boot ---------- */

.boot { border-color: var(--green); }
.boot-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(17rem, .9fr);
    gap: 1.5rem;
    align-items: center;
}
.boot h2 {
    margin: .2rem 0 .5rem;
    color: var(--green);
    font-size: clamp(2.8rem, 8vw, 5.6rem);
    letter-spacing: .01em;
    line-height: 1;
}
.boot-cursor { width: .34em; height: .68em; margin-left: .08em; background: var(--green); vertical-align: .02em; }
.boot .lede { margin-bottom: 1.1rem; }

.boot-log {
    margin: 0;
    padding: 1rem;
    border: 1px solid var(--line-bright);
    background: var(--ega-black);
    color: var(--ink);
    font-size: .74rem;
    line-height: 1.8;
    overflow-x: auto;
}

/* ---------- Footer ---------- */

.site-foot {
    margin-top: 1.5rem;
    padding: 1.3rem 0 1rem;
    border-top: 4px double var(--line-bright);
    background: var(--ega-black);
    font-size: .7rem;
}
.foot-grid {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem 2rem;
    flex-wrap: wrap;
}
.foot-brand { margin: 0 0 .2rem; color: var(--ega-white); font-size: .82rem; font-weight: 700; letter-spacing: .06em; }
.foot-brand span { color: var(--green); }
.foot-brand small { color: var(--muted); font-size: .64rem; font-weight: 400; }
.foot-line { max-width: 48ch; margin: 0; color: var(--muted); font-size: .68rem; }
.foot-links { display: flex; flex-wrap: wrap; gap: .35rem 1rem; }
.foot-links a { color: var(--cyan); text-decoration: none; }
.foot-links a:hover { background: var(--ega-red); color: var(--ega-white); }

.foot-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: .35rem 1rem;
    margin-top: 1rem;
    padding-top: .6rem;
    border-top: 1px dashed var(--line);
    color: #8a958c;
    font-size: .55rem;
    letter-spacing: .05em;
    text-transform: uppercase;
}

@keyframes blink { to { visibility: hidden; } }
@keyframes pulse { to { opacity: .25; } }

/* ---------- Tablet and phone ---------- */

@media (max-width: 1080px) {
    .page-grid { grid-template-columns: 1fr; }
    .contents {
        position: sticky;
        top: 3.35rem;
        z-index: 50;
        flex-direction: row;
        gap: .1rem;
        margin: 0 0 .8rem;
        padding: .3rem .45rem;
        overflow-x: auto;
        border-right: 0;
        border-left: 0;
        box-shadow: 0 4px 0 var(--ega-black);
        scrollbar-width: thin;
        scrollbar-color: var(--line-bright) var(--ega-black);
    }
    .contents::-webkit-scrollbar { height: 4px; }
    .contents::-webkit-scrollbar-track { background: var(--ega-black); }
    .contents::-webkit-scrollbar-thumb { background: var(--line-bright); }
    .contents-label, .contents-status { display: none; }
    .contents a {
        border-left: 0;
        border-bottom: 2px solid transparent;
        white-space: nowrap;
        padding: .35rem .5rem;
        font-size: .6rem;
    }
    .contents a.active { border-left: 0; border-bottom-color: var(--green); }
    .cap { grid-template-columns: 2.2rem minmax(0, 1fr); }
    .cap-code { grid-column: 2; }
}

@media (min-width: 961px) and (max-width: 1280px) {
    .term-body pre { font-size: .72rem; }
}

@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-side { max-width: 44rem; }
    .hero .lede { max-width: 66ch; }
    .split { grid-template-columns: 1fr; }
    .side-note { max-width: 40rem; }
    .cap { grid-template-columns: 2.2rem minmax(0, 1fr); }
    .cap-code { grid-column: 2; }
    .inside-grid { grid-template-columns: 1fr; }
    .quick-grid { grid-template-columns: 1fr; }
    .spec-table { grid-template-columns: 1fr; }
    .glossary { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
    html { scroll-padding-top: 6.2rem; }
    .nav { display: none; }
    .head-inner { min-height: 2.7rem; }
    .brand-name { font-size: .8rem; }
    .brand-ver { display: none; }
    .page { padding: .75rem var(--gutter) 2rem; }
    .panel-body { padding: 1.1rem; }
    .win-bar { grid-template-columns: 1fr auto; }
    .win-bar span:nth-child(2) { display: none; }
    .spec-strip { grid-template-columns: repeat(2, 1fr); }
    .spec-strip > div:nth-child(2n) { border-right: 0; }
    .spec-strip > div { border-bottom: 1px solid var(--line); }
    .spec-strip > div:nth-last-child(-n+2) { border-bottom: 0; }
    .not-grid { grid-template-columns: 1fr; }
    .audience { grid-template-columns: 1fr; }
    .faq-grid { grid-template-columns: 1fr; }
    .arch { grid-template-columns: 1fr; }
    .arch-link { flex-direction: row; gap: .8rem; padding: .2rem 0; }
    .boot-grid { grid-template-columns: 1fr; }
    .tour-tab { flex: 1 1 calc(50% - .25rem); justify-content: center; }
    .terminal-pre { min-height: 14rem; font-size: .7rem; padding: .8rem; }
    .quick-grid { padding: 1rem; }
    .quick-foot { flex-direction: column; align-items: flex-start; }
    .quick-foot .btn { width: 100%; }
    .foot-grid { flex-direction: column; }
    .foot-bottom { justify-content: flex-start; }
}

@media (max-width: 520px) {
    .actions { flex-direction: column; align-items: stretch; }
    .actions .btn, .hero .actions .btn { width: 100%; }
    .hero h1 { font-size: clamp(1.65rem, 9.2vw, 2.2rem); }
    .hero .lede { font-size: .92rem; }
    .term-body pre { font-size: .62rem; }
    .term-foot { font-size: .42rem; }
    .contents a { font-size: .54rem; padding: .32rem .4rem; }
    .panel { box-shadow: 3px 3px 0 var(--ega-black); }
    .quick-card { box-shadow: 5px 5px 0 var(--ega-black); }
    .quick-head { flex-direction: column; }
    .cap { grid-template-columns: 1fr; }
    .cap-code { grid-column: 1; }
    .cap-num { padding-top: 0; }
    .spec-table > div { grid-template-columns: 5.2rem 1fr; }
    .tour-meta { font-size: .46rem; }
    .terminal-pre, .term-body pre, .cap-code, .code-block, .boot-log {
        font-size: .63rem;
        white-space: pre-wrap;
        overflow-wrap: anywhere;
    }
    .code-block, .boot-log { font-size: .64rem; }
    .boot h2 { font-size: clamp(2.4rem, 15vw, 3.4rem); }
    .copy-block pre { padding-right: .7rem; padding-top: 1.9rem; }
    .copy-btn { top: .3rem; right: .3rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation: none !important; transition: none !important; }
}