/* serverino.dev — colours taken from the project logo */

:root {
   --accent:        #31a3e1;   /* the light blue of the logo */
   --accent-dark:   #1c7fb4;
   --deep:          #254c6b;   /* deep blue */
   --ink:           #0f2233;   /* almost black blue */
   --muted:         #537193;   /* blue grey */
   --line:          #d7e1ea;
   --line-strong:   #bfd0dd;
   --surface:       #f4f8fb;
   --surface-2:     #eef3f7;
   --pale:          #eff1ec;
   --bg:            #ffffff;
   --ok:            #1e7a53;
   --warn:          #a2551a;

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

   --radius: 10px;
   --page: 1100px;
}

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

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

body {
   margin: 0;
   font-family: var(--sans);
   font-size: 16px;
   line-height: 1.65;
   color: var(--ink);
   background: var(--bg);
}

h1, h2, h3, h4 { line-height: 1.25; color: var(--deep); margin: 0 0 .5em; font-weight: 650; }
h1 { font-size: 2.5rem; letter-spacing: -.02em; color: var(--ink); }
h2 { font-size: 1.6rem; margin-top: 0; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre, kbd { font-family: var(--mono); font-size: .875rem; }
pre { tab-size: 3; -moz-tab-size: 3; }

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

.wrap { max-width: var(--page); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 780px; }
/* Le demo non sono prosa: il codice accanto al pannello ha bisogno di piu'
   spazio di quanto sia comodo leggere un paragrafo. */
.wide { max-width: 1280px; }

/* ---------------------------------------------------------------- header */

.site-header {
   position: sticky; top: 0; z-index: 20;
   background: rgba(255,255,255,.92);
   backdrop-filter: saturate(1.4) blur(8px);
   border-bottom: 1px solid var(--line);
}

.site-header .wrap { display: flex; align-items: center; gap: 28px; height: 62px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 680; color: var(--ink); font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; display: block; }

.brandline { display: flex; align-items: center; gap: 10px; min-width: 0; }

/* The space is reserved from the start: the version arrives from the server a
   moment later, and a header that reflows on load is a header that flickers. */
.version {
   display: inline-flex; align-items: center; justify-content: center;
   min-width: 4.6em; height: 22px;
   padding: 0 8px; border: 1px solid var(--line-strong); border-radius: 20px;
   font-family: var(--mono); font-size: .72rem; color: var(--muted); background: var(--surface);
}
.version:hover { border-color: var(--accent); color: var(--accent-dark); text-decoration: none; }

.site-nav { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.site-nav a { color: var(--muted); font-size: .95rem; font-weight: 550; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--deep); text-decoration: none; }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }

.gh { display: inline-flex; align-items: center; gap: 7px; }
.gh svg { width: 18px; height: 18px; fill: currentColor; }

/* ---------------------------------------------------------------- hero */

.hero { padding: 76px 0 56px; border-bottom: 1px solid var(--line); background:
   radial-gradient(900px 320px at 12% -10%, rgba(49,163,225,.10), transparent 70%); }

.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.hero h1 { font-size: 3rem; margin-bottom: .35em; }
.hero .lead { font-size: 1.2rem; color: var(--muted); max-width: 34em; }
.hero .lead strong { color: var(--ink); font-weight: 620; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.btn {
   display: inline-flex; align-items: center; gap: 8px;
   padding: 10px 18px; border-radius: 8px; font-weight: 600; font-size: .95rem;
   border: 1px solid var(--line-strong); background: #fff; color: var(--deep);
   cursor: pointer; font-family: inherit;
}
.btn:hover { text-decoration: none; border-color: var(--muted); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn-small { padding: 5px 11px; font-size: .8rem; font-weight: 550; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

.badges { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 26px; color: var(--muted); font-size: .875rem; }
.badges span { display: inline-flex; align-items: center; gap: 7px; }
.badges span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* ---------------------------------------------------------------- code */

.code {
   background: var(--surface);
   border: 1px solid var(--line);
   border-radius: var(--radius);
   overflow: hidden;
}
.code-head {
   display: flex; align-items: center; gap: 10px;
   padding: 8px 14px; border-bottom: 1px solid var(--line);
   background: var(--surface-2);
   font-size: .78rem; color: var(--muted); font-family: var(--mono);
}
.code-head .spacer, .wsbar .spacer { margin-left: auto; }
.code pre { margin: 0; padding: 16px; overflow-x: auto; line-height: 1.6; }
.code.plain { background: #fff; }

pre.sample { margin: 0 0 1.2em; padding: 16px; background: var(--surface); border: 1px solid var(--line);
   border-radius: var(--radius); overflow-x: auto; line-height: 1.6; }

.tok-key   { color: #0f5ea8; font-weight: 600; }
.tok-uda   { color: #7a4bbd; font-weight: 600; }
.tok-str   { color: #1e7a53; }
.tok-com   { color: #7c8ea0; font-style: italic; }
.tok-num   { color: #a2551a; }
.tok-type  { color: var(--deep); font-weight: 600; }

/* ---------------------------------------------------------------- sections */

section { padding: 64px 0; }
section + section { border-top: 1px solid var(--line); }
.section-head { max-width: 42em; margin-bottom: 34px; }
.section-head p { color: var(--muted); margin-bottom: 0; }
.eyebrow { text-transform: uppercase; letter-spacing: .09em; font-size: .74rem; font-weight: 700;
   color: var(--accent-dark); margin-bottom: 8px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; background: #fff; }
.card h3 { margin-bottom: .35em; font-size: 1.02rem; }
.card p { margin: 0; color: var(--muted); font-size: .93rem; }
.card .ico { width: 30px; height: 30px; margin-bottom: 12px; color: var(--accent); }
.card .ico svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.6; }

/* ---------------------------------------------------------------- demo */

.demo {
   border: 1px solid var(--line);
   border-radius: var(--radius);
   overflow: hidden;
   background: #fff;
   margin-bottom: 26px;
}

.demo-title {
   display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
   padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--surface-2);
}
.demo-title h3 { margin: 0; font-size: 1rem; }
.demo-title p { margin: 0; color: var(--muted); font-size: .88rem; }
.demo-title .lines { margin-left: auto; font-family: var(--mono); font-size: .75rem; color: var(--muted); }

/* La colonna del codice e. larga quanto lo snippet piu. largo della pagina: il
   js la misura e la scrive in --code-col, cosi. nessun blocco scorre e i
   divisori restano allineati scendendo. Senza js si dimensiona sul proprio
   contenuto, che e. il comportamento corretto per un blocco solo. */
.demo-body {
   display: grid;
   grid-template-columns: minmax(0, var(--code-col, max-content)) minmax(360px, 1fr);
   /* Uno snippet di otto righe lascerebbe al pannello accanto meno spazio di
      quanto gliene serve, e a scorrere sarebbe lui. */
   min-height: 440px;
}
.demo-source { border-right: 1px solid var(--line); background: var(--surface); min-width: 0; }
.demo-source pre { margin: 0; padding: 18px; overflow-x: auto; line-height: 1.6; }
.demo-live { padding: 18px; min-width: 0; display: flex; flex-direction: column; gap: 12px; }

.demo-controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: .74rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 650; }
.field select {
   font: inherit; font-size: .9rem; padding: 7px 10px;
   border: 1px solid var(--line-strong); border-radius: 7px; background: #fff; color: var(--ink);
}
.field input[type=text], .field input[type=file] {
   font: inherit; font-size: .9rem; padding: 7px 10px;
   border: 1px solid var(--line-strong); border-radius: 7px; background: #fff; color: var(--ink);
   min-width: 150px;
}
.field input[type=text]:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px rgba(49,163,225,.18); }

.reqline {
   font-family: var(--mono); font-size: .8rem; color: var(--deep);
   background: var(--pale); border: 1px solid var(--line); border-radius: 7px;
   padding: 7px 10px; overflow-x: auto; white-space: nowrap;
}

/* Reserved, not removed: a row that pops into existence shifts everything below it. */
.respbar.idle .status { background: transparent; color: var(--muted); font-weight: 500; padding-left: 0; }
.respbar { display: flex; align-items: center; gap: 10px; min-height: 26px;
   font-family: var(--mono); font-size: .78rem; color: var(--muted); }
.status { font-weight: 700; padding: 2px 8px; border-radius: 20px; line-height: 18px;
   background: rgba(30,122,83,.12); color: var(--ok); }
.status.err { background: rgba(162,85,26,.14); color: var(--warn); }
.timing { color: var(--muted); }
.timing b { color: var(--ink); font-weight: 700; }

.output {
   /* Prende tutto lo spazio che avanza nella colonna, che dipende dal codice a
      fianco e non da cosa ci finisce dentro: cosi. non si scorre avendo il
      vuoto sotto, e riempirlo non muove comunque la pagina. */
   margin: 0; padding: 12px 14px; flex: 1 1 0; min-height: 140px; overflow: auto;
   background: var(--surface); border: 1px solid var(--line); border-radius: 7px;
   font-family: var(--mono); font-size: .82rem; white-space: pre-wrap; word-break: break-word;
   color: var(--ink);
}
.output.empty { color: var(--muted); display: flex; align-items: center; justify-content: center; text-align: center; }
.output > div { min-height: 0; }
.output iframe { width: 100%; height: 280px; border: 0; background: #fff; }

.says { display: flex; flex-wrap: wrap; gap: 7px; }
.says .say { font-size: .85rem; padding: 5px 10px; line-height: 1.3; }
.says .say:not([disabled]):hover { border-color: var(--accent); color: var(--accent-dark); }

.console { display: flex; flex-direction: column; gap: 5px; }
/* Senza questo le righe si comprimono l.una sull.altra invece di uscire dal
   riquadro, e la chat diventa illeggibile appena si riempie. */
.console .line { flex: 0 0 auto; font-family: var(--mono); font-size: .8rem; }
.console .line.out { color: var(--deep); }
.console .line.in { color: var(--ok); }
.console .line.sys { color: var(--muted); font-style: italic; }

.wsbar { display: flex; align-items: center; gap: 10px; font-size: .8rem; color: var(--muted); font-family: var(--mono); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); display: inline-block; }
.dot.on { background: var(--ok); box-shadow: 0 0 0 3px rgba(30,122,83,.15); }

/* Big numbers for the demos that measure something. */
.tiles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 12px; }
.tile { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: #fff; }
.tile-value { font-family: var(--mono); font-size: 1.35rem; font-weight: 700; color: var(--deep); line-height: 1.2; }
.tile-label { font-size: .74rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-top: 2px; }
.tiles-note { margin: 0; font-size: .82rem; color: var(--muted); line-height: 1.5; }

.demo-note { margin: 0; font-size: .82rem; color: var(--muted); line-height: 1.5; }

.plotbar { display: flex; align-items: center; }
.seg { display: inline-flex; gap: 0; border: 1px solid var(--line-strong); border-radius: 7px; overflow: hidden; }
.seg .btn { border: 0; border-radius: 0; background: #fff; color: var(--muted); }
.seg .btn + .btn { border-left: 1px solid var(--line); }
.seg .btn.on { background: var(--surface-2); color: var(--deep); font-weight: 650; }
.seg .btn:hover { color: var(--deep); }

/* Come il riquadro dell.output prende lo spazio che avanza, ma con un tetto:
   un registro di testo guadagna da ogni riga in piu., un grafico no. */
canvas.plot { width: 100%; flex: 1 1 0; min-height: 150px; max-height: 380px; display: block;
   border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }

.curl { display: flex; align-items: center; gap: 8px; margin-top: auto; }
.curl code { flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; color: var(--muted); font-size: .76rem; }

/* ---------------------------------------------------------------- examples page */

.with-aside { display: grid; grid-template-columns: 230px 1fr; gap: 42px; align-items: start; }
.with-aside > * { min-width: 0; }
.toc { position: sticky; top: 86px; font-size: .9rem; }
.toc h4 { font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 10px; }
.toc ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.toc a { display: block; padding: 4px 10px; border-left: 2px solid var(--line); color: var(--muted); }
.toc a:hover { color: var(--deep); border-left-color: var(--line-strong); text-decoration: none; background: var(--surface); }
.toc a.active { color: var(--deep); border-left-color: var(--accent); font-weight: 600; }

.example { margin-bottom: 40px; scroll-margin-top: 84px; }
.example > h3 { margin-bottom: .2em; }
.example > p.summary { color: var(--muted); margin-bottom: 14px; }
.example .code pre { max-height: 460px; overflow: auto; }

/* ---------------------------------------------------------------- prose */

.prose h2 { margin-top: 2.2em; scroll-margin-top: 84px; }
.prose h3 { margin-top: 1.8em; scroll-margin-top: 84px; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1.2em; }
.prose li { margin-bottom: .35em; }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.4em; font-size: .93rem; }
.prose td:first-child code { white-space: nowrap; }
.prose th, .prose td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.prose td code { background: var(--surface); padding: 1px 5px; border-radius: 4px; }
.prose p code, .prose li code { background: var(--surface); padding: 1px 5px; border-radius: 4px; }
.prose blockquote { margin: 0 0 1.2em; padding: 12px 16px; border-left: 3px solid var(--accent);
   background: var(--surface); border-radius: 0 7px 7px 0; color: var(--deep); }
.prose blockquote p:last-child { margin-bottom: 0; }

/* A language switch that belongs to the page, not to the section under it:
   its own rule above the heading, with the other language on the far side. */
.langbar {
   display: flex; align-items: baseline; gap: 18px;
   padding-bottom: 10px; margin-bottom: 18px; border-bottom: 1px solid var(--line);
}
.langbar .eyebrow { margin-bottom: 0; }
.langbar a { margin-left: auto; font-size: .82rem; font-weight: 550; color: var(--muted); }
.langbar a:hover { color: var(--accent-dark); }

/* The one thing on the page you are meant to take away with you. */
.promptbox { display: flex; align-items: flex-start; gap: 16px; margin: 0 0 1.4em;
   padding: 18px 20px; border: 1px solid var(--line-strong); border-left: 3px solid var(--accent);
   border-radius: 0 var(--radius) var(--radius) 0; background: var(--surface); }
.promptbox p { margin: 0; flex: 1; color: var(--ink); }
.promptbox .btn { flex: 0 0 auto; }

.note { border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 0 var(--radius) var(--radius) 0;
   background: var(--surface); padding: 14px 18px; margin: 0 0 1.4em; }
.note p:last-child { margin-bottom: 0; }
.note strong { color: var(--deep); }

.support { display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
   border: 1px solid var(--line); border-left: 3px solid var(--accent);
   border-radius: 0 var(--radius) var(--radius) 0; background: var(--surface); padding: 24px 28px; }
.support h2 { font-size: 1.25rem; margin-bottom: .35em; }
.support p { margin: 0; color: var(--muted); }
.support > div { flex: 1 1 320px; }
.support .btn { flex: 0 0 auto; font-size: 1rem; padding: 12px 20px; }

/* ---------------------------------------------------------------- footer */

.site-footer { border-top: 1px solid var(--line); background: var(--surface); padding: 40px 0; margin-top: 20px; color: var(--muted); font-size: .9rem; }
.footer-grid { display: flex; gap: 40px; flex-wrap: wrap; }
.footer-grid > div { min-width: 160px; }
.footer-grid h4 { font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 10px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 5px; }
.footer-grid .beer { border: 1px solid var(--line-strong); border-radius: var(--radius);
   padding: 14px 16px; background: #fff; max-width: 260px; }
.footer-grid .beer h4 { margin-bottom: 4px; }
.footer-grid .beer p { margin: 0 0 10px; font-size: .88rem; color: var(--muted); }
.footer-grid .beer .btn { white-space: nowrap; }

.colophon { margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line-strong); font-size: .85rem; }

/* ---------------------------------------------------------------- responsive */

@media (max-width: 980px) {
   .hero-grid { grid-template-columns: 1fr; gap: 34px; }
   .cards { grid-template-columns: repeat(2, 1fr); }
   .with-aside { grid-template-columns: 1fr; gap: 20px; }
   .toc { position: static; }
   .toc ol { flex-direction: row; flex-wrap: wrap; }
}

@media (max-width: 860px) {
   .demo-body { grid-template-columns: 1fr; }
   .demo-source { border-right: 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 700px) {
   .hero { padding: 48px 0 40px; }
   .hero h1 { font-size: 2.2rem; }
   .cards { grid-template-columns: 1fr; }
   section { padding: 44px 0; }

   /* Two rows: the brand, then the navigation, scrollable if it does not fit. */
   .site-header .wrap { flex-wrap: wrap; height: auto; gap: 4px; padding-top: 10px; padding-bottom: 6px; }
   .site-nav {
      order: 3; width: 100%; margin-left: 0; gap: 18px;
      overflow-x: auto; white-space: nowrap; padding-bottom: 6px;
      scrollbar-width: none;
   }
   .site-nav::-webkit-scrollbar { display: none; }
   .site-nav a { flex: 0 0 auto; }
}