/* ========================================================================
   php2shell.net — styles  (system fonts only, no CDNs, no trackers)
   Light/dark follows the OS; app.js adds a manual toggle via [data-theme].
   ======================================================================== */

:root {
  --wrap: 52rem;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 10px;
  --radius-sm: 7px;

  --bg: #ffffff;
  --surface: #f5f6f8;
  --border: #e1e4e9;
  --border-strong: #c7ccd4;
  --text: #14171c;
  --muted: #535c69;
  --faint: #687180;
  --link: #0b5fcc;
  --crit: #c4162a;
  --crit-soft: #fdeef0;
  --warn: #8a5300;
  --warn-soft: #fcf3e3;
  --ok: #17703a;
  --ok-soft: #e7f4eb;
  --code-bg: #0f1218;
  --code-head: #171b23;
  --code-line: #262c37;
  --code-fg: #dde3ec;
  --code-dim: #8d97a8;
  color-scheme: light;
}

/* Dark tokens: once for the OS preference, once for the manual toggle. Keep in sync. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0e12;
    --surface: #14171d;
    --border: #252a33;
    --border-strong: #363d49;
    --text: #e8ebef;
    --muted: #a3abb7;
    --faint: #808a98;
    --link: #70b0ff;
    --crit: #ff5d6a;
    --crit-soft: rgba(255, 93, 106, .1);
    --warn: #f0b440;
    --warn-soft: rgba(240, 180, 64, .1);
    --ok: #4fc97c;
    --ok-soft: rgba(79, 201, 124, .1);
    --code-bg: #08090c;
    --code-head: #111419;
    --code-line: #20252e;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0c0e12;
  --surface: #14171d;
  --border: #252a33;
  --border-strong: #363d49;
  --text: #e8ebef;
  --muted: #a3abb7;
  --faint: #808a98;
  --link: #70b0ff;
  --crit: #ff5d6a;
  --crit-soft: rgba(255, 93, 106, .1);
  --warn: #f0b440;
  --warn-soft: rgba(240, 180, 64, .1);
  --ok: #4fc97c;
  --ok-soft: rgba(79, 201, 124, .1);
  --code-bg: #08090c;
  --code-head: #111419;
  --code-line: #20252e;
  color-scheme: dark;
}

/* ---------------- Base ---------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }
@media (min-width: 48em) { html { scroll-padding-top: 4.5rem; } }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 1.25rem; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -.015em; text-wrap: balance; }
p { margin: 0 0 .75rem; }

a { color: var(--link); text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: .18em; }
a:hover { text-decoration-color: currentColor; }

code { font-family: var(--mono); font-size: .875em; }
:not(pre) > code {
  padding: .1em .35em;
  border-radius: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow-wrap: anywhere;
}
h3 code { font-size: .85em; }

strong { font-weight: 650; }
.muted { color: var(--faint); font-size: .85em; font-weight: 400; }
.nowrap { white-space: nowrap; }

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

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  padding: .625rem 1rem; background: var(--link); color: #fff; font-weight: 600;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

/* ---------------- Header ---------------- */
.site-header { border-bottom: 1px solid var(--border); background: var(--bg); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; column-gap: 1rem; min-height: 3.5rem; }

.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--text); font-weight: 700; letter-spacing: -.01em; text-decoration: none; }
.brand-mark { padding: .3rem .4rem; border-radius: 5px; background: var(--crit); color: #fff; font: 700 .75rem/1 var(--mono); }
.brand-tld { color: var(--faint); font-weight: 500; }

.site-nav { display: flex; gap: .125rem; margin-left: auto; }
.site-nav a {
  padding: .375rem .625rem; border-radius: 6px;
  color: var(--muted); font-size: .875rem; font-weight: 500; text-decoration: none; white-space: nowrap;
}
.site-nav a:hover { background: var(--surface); color: var(--text); }

.theme-toggle {
  display: inline-grid; place-items: center; width: 2rem; height: 2rem; margin-left: .25rem;
  border: 1px solid var(--border); border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle[hidden] { display: none; }

@media (min-width: 48em) {
  .site-header {
    position: sticky; top: 0; z-index: 10;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
}
@media (max-width: 47.99em) {
  .theme-toggle { margin-left: auto; }
  .site-nav {
    order: 3; flex-basis: 100%; margin: 0 0 0 -.625rem; padding-bottom: .5rem;
    overflow-x: auto; scrollbar-width: none;
  }
  .site-nav::-webkit-scrollbar { display: none; }
}

/* ---------------- Hero ---------------- */
.hero { padding-top: 2.75rem; }

.eyebrow {
  display: flex; flex-wrap: wrap; align-items: center; gap: .375rem 1rem;
  margin: 0 0 1rem; color: var(--muted); font: 500 .8125rem/1.4 var(--mono);
}
.badge-live {
  display: inline-flex; align-items: center; gap: .45rem;
  color: var(--crit); font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
}
.badge-live::before {
  content: ""; width: .5rem; height: .5rem; border-radius: 50%;
  background: var(--crit); box-shadow: 0 0 0 3px var(--crit-soft);
}

h1 { margin: 0 0 1rem; font-size: clamp(1.875rem, 1.3rem + 2.4vw, 2.625rem); font-weight: 750; }
.lede { margin: 0 0 1.75rem; color: var(--muted); font-size: 1.1875rem; line-height: 1.55; }
.lede strong { color: var(--text); }

.glance {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  margin: 0 0 1.25rem; overflow: hidden;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--border);
}
.glance > div { min-width: 0; padding: .875rem 1rem; background: var(--surface); }
.glance dt { margin: 0 0 .3rem; color: var(--faint); font: 600 .6875rem/1.3 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.glance dd { margin: 0; }
.glance-value { display: block; font-size: 1.3125rem; font-weight: 700; line-height: 1.25; font-variant-numeric: tabular-nums; }
.glance-value--crit { color: var(--crit); }
.glance-value.is-due { color: var(--ok); }
.glance-value--list { font-size: 1.0625rem; line-height: 1.3; }
.glance-value--list span { display: block; }
.glance-sub { display: block; margin-top: .2rem; color: var(--muted); font-size: .8125rem; line-height: 1.4; }
@media (max-width: 40em) { .glance { grid-template-columns: 1fr 1fr; } }

.callout {
  padding: 1rem 1.25rem;
  border: 1px solid color-mix(in srgb, var(--crit) 30%, var(--border));
  border-left: 4px solid var(--crit);
  border-radius: var(--radius);
  background: var(--crit-soft);
}
.callout p { margin: 0; color: var(--muted); }
.callout .callout-title { margin-bottom: .25rem; color: var(--text); font-size: 1.0625rem; font-weight: 700; }

/* ---------------- Sections ---------------- */
.section { padding-top: 2.75rem; }
.section > h2 {
  margin: 0 0 .75rem; padding-top: 2.5rem; border-top: 1px solid var(--border);
  font-size: 1.625rem; font-weight: 700;
}
.section--first > h2 { padding-top: 0; border-top: 0; }
.section > h3 { margin: 2.25rem 0 .75rem; font-size: 1.0625rem; font-weight: 650; }
.section-lede { margin-bottom: 1.75rem; color: var(--muted); }
.section-lede strong { color: var(--text); }
.note { color: var(--muted); font-size: .9375rem; }

/* ---------------- Tags ---------------- */
.tag {
  display: inline-block; padding: .25em .5em; vertical-align: .08em;
  border: 1px solid var(--border); border-radius: 4px; background: var(--surface); color: var(--muted);
  font: 650 .6875rem/1.1 var(--sans); letter-spacing: .05em; text-transform: uppercase; white-space: nowrap;
}
.tag--unofficial, .tag--reported {
  border-color: color-mix(in srgb, var(--warn) 35%, transparent); background: var(--warn-soft); color: var(--warn);
}
.tag--confirmed {
  border-color: color-mix(in srgb, var(--ok) 35%, transparent); background: var(--ok-soft); color: var(--ok);
}

/* ---------------- Steps ---------------- */
.steps { margin: 0; padding: 0; list-style: none; counter-reset: step; }
.step { position: relative; padding: 0 0 2.5rem 3.25rem; counter-increment: step; }
.step:last-child { padding-bottom: 0; }

.step::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: 50%;
  background: var(--text); color: var(--bg);
  font-weight: 700; font-variant-numeric: tabular-nums;
}
.step::after {
  content: ""; position: absolute; left: calc(1.125rem - 1px); top: 2.75rem; bottom: .5rem;
  width: 2px; border-radius: 1px; background: var(--border);
}
.step:last-child::after { display: none; }
.step--stopgap::before { background: var(--warn-soft); color: var(--warn); box-shadow: inset 0 0 0 2px var(--warn); }

.step > h3 { margin: 0 0 .5rem; font-size: 1.1875rem; font-weight: 650; }
.step > h3:first-child { padding-top: .3rem; }
.step > p { color: var(--muted); }
.step > p strong, .step > p em { color: var(--text); }
.step-tag { margin: 0 0 .35rem; line-height: 1; }

/* Phones: tighter rail, and code/expanders use the full width (painted over the rail). */
@media (max-width: 30em) {
  .step { padding-left: 2.5rem; }
  .step::before { width: 1.75rem; height: 1.75rem; font-size: .875rem; }
  .step::after { left: calc(.875rem - 1px); top: 2.25rem; }
  .step > h3:first-child { padding-top: .1rem; }
  .step > .code, .step > .more, .step > .more-group { position: relative; z-index: 1; margin-left: -2.5rem; background-color: var(--bg); }
  .step > .code { background-color: var(--code-bg); }
}

/* ---------------- Code blocks ---------------- */
.code { margin: .875rem 0 1rem; overflow: hidden; border: 1px solid var(--code-line); border-radius: var(--radius-sm); background: var(--code-bg); }
.code-head {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  min-height: 2.125rem; padding: .25rem .375rem .25rem .875rem;
  border-bottom: 1px solid var(--code-line); background: var(--code-head);
  color: var(--code-dim); font: 500 .75rem/1.2 var(--mono);
}
.code pre { margin: 0; padding: .75rem .875rem; overflow-x: auto; color: var(--code-fg); font-size: .8125rem; line-height: 1.65; tab-size: 4; }
.code pre code { font-size: inherit; }
.code .c { color: var(--code-dim); }

.copy-btn {
  padding: .3rem .6rem; border: 1px solid #343b47; border-radius: 5px;
  background: transparent; color: #b6c0ce; font: 600 .75rem/1 var(--sans); cursor: pointer;
}
.copy-btn:hover { border-color: #56606f; color: #fff; }
.copy-btn.copied { border-color: rgba(79, 201, 124, .5); color: #4fc97c; }

/* ---------------- Expanders ---------------- */
.more { margin: .875rem 0; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.more > summary {
  display: flex; align-items: center; gap: .625rem; padding: .625rem .875rem;
  font-size: .9375rem; font-weight: 600; cursor: pointer; list-style: none;
}
.more > summary::-webkit-details-marker { display: none; }
.more > summary::before {
  content: ""; flex: none; width: .4rem; height: .4rem; margin-left: .1rem;
  border-right: 2px solid var(--faint); border-bottom: 2px solid var(--faint);
  transform: rotate(-45deg); transition: transform .15s ease;
}
.more[open] > summary::before { transform: rotate(45deg); }
.more > summary:hover { background: var(--surface); }
.more > summary:focus-visible { outline-offset: -2px; }
.more-body { padding: .25rem .875rem .875rem; }
.more-body > p { color: var(--muted); font-size: .9375rem; }
.more-body > p strong { color: var(--text); }
.more-body > :last-child { margin-bottom: 0; }

.more-group { margin: 1rem 0; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.more-group > .more { margin: 0; border: 0; border-radius: 0; }
.more-group > .more + .more { border-top: 1px solid var(--border); }

/* Key/value table inside expanders */
.kv { width: 100%; margin: 0 0 .5rem; border-collapse: collapse; font-size: .875rem; }
.kv th, .kv td { padding: .5rem .75rem .5rem 0; border-top: 1px solid var(--border); text-align: left; vertical-align: top; }
.kv tr:first-child > * { border-top: 0; }
.kv th { width: 38%; color: var(--muted); font-weight: 500; }
@media (max-width: 30em) {
  .kv tr { display: block; padding: .5rem 0; border-top: 1px solid var(--border); }
  .kv tr:first-child { border-top: 0; }
  .kv th, .kv td { display: block; width: auto; padding: 0; border: 0; }
}

/* ---------------- Tables ---------------- */
.table-wrap { margin: 1rem 0; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.table th, .table td { padding: .625rem .875rem; border-top: 1px solid var(--border); text-align: left; vertical-align: top; }
.table thead th {
  border-top: 0; background: var(--surface); color: var(--muted);
  font-size: .75rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; white-space: nowrap;
}
.table tbody th { font-weight: 600; }
.table tbody tr:first-child > * { border-top: 0; }
.table thead + tbody tr:first-child > * { border-top: 1px solid var(--border); }
.table--kv tbody th { width: 30%; color: var(--muted); font-weight: 500; }
.table--kv td code { display: inline-block; margin: .1rem .1rem .1rem 0; }
.is-ok { color: var(--ok); font-weight: 600; }
.is-bad { color: var(--crit); font-weight: 600; }

/* ---------------- What we know ---------------- */
.facts { margin: 0 0 2rem; border-top: 1px solid var(--border); }
.facts > div { display: grid; grid-template-columns: 12rem 1fr; gap: .25rem 1.5rem; padding: 1rem 0; border-bottom: 1px solid var(--border); }
.facts dt { font-weight: 650; }
.facts dd { margin: 0; color: var(--muted); }
@media (max-width: 40em) { .facts > div { grid-template-columns: 1fr; } }

.quote { margin: 0 0 1rem; padding-left: 1.25rem; border-left: 3px solid var(--border-strong); }
.quote blockquote { margin: 0; font-size: 1.0625rem; }
.quote blockquote p { margin: 0 0 .5rem; }
.quote figcaption { color: var(--muted); font-size: .875rem; }

/* ---------------- FAQ ---------------- */
.faq { border-bottom: 1px solid var(--border); }
.faq:first-of-type { border-top: 1px solid var(--border); }
.faq > summary {
  position: relative; padding: 1rem 2rem 1rem 0;
  font-weight: 600; cursor: pointer; list-style: none;
}
.faq > summary::-webkit-details-marker { display: none; }
.faq > summary::after {
  content: "+"; position: absolute; right: .25rem; top: 50%; transform: translateY(-50%);
  color: var(--faint); font-size: 1.25rem; font-weight: 400;
}
.faq[open] > summary::after { content: "\2212"; }
.faq > p { margin: -.25rem 0 1rem; color: var(--muted); }

/* ---------------- References ---------------- */
.section > .ref-group { margin: 1.75rem 0 .5rem; color: var(--muted); font-size: .75rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; }
.refs { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--border); }
.refs li { display: flex; flex-wrap: wrap; align-items: baseline; gap: .25rem .625rem; padding: .625rem 0; border-bottom: 1px solid var(--border); font-size: .9375rem; }
.refs a { font-weight: 500; text-decoration: none; }
.refs a:hover { text-decoration: underline; }
.ref-tag { padding: .1rem .45rem; border: 1px solid var(--border); border-radius: 4px; background: var(--surface); color: var(--muted); font-size: .75rem; white-space: nowrap; }
.ref-tag--primary { border-color: color-mix(in srgb, var(--ok) 35%, transparent); background: var(--ok-soft); color: var(--ok); }
.ref-tag--warn { border-color: color-mix(in srgb, var(--crit) 35%, transparent); background: var(--crit-soft); color: var(--crit); }
.ref-date { margin-left: auto; color: var(--faint); font: .8125rem var(--mono); white-space: nowrap; }

/* ---------------- Footer ---------------- */
.site-footer { margin-top: 4.5rem; padding: 2rem 0 3rem; border-top: 1px solid var(--border); background: var(--surface); color: var(--muted); font-size: .875rem; }
.site-footer p { max-width: 46rem; }
.footer-lead { color: var(--text); font-size: .9375rem; }
.footer-meta { margin: 0; color: var(--faint); font-family: var(--mono); font-size: .8125rem; }

/* ---------------- 404 ---------------- */
.notfound { display: grid; align-content: center; min-height: 80vh; padding-block: 4rem; }
.notfound .lede { margin-bottom: 1rem; }

/* ---------------- Print ---------------- */
@media print {
  .site-header, .theme-toggle, .copy-btn, .skip-link { display: none; }
  .site-header { position: static; }
  .code, .more, .table-wrap, .step { break-inside: avoid; }
  .site-footer { background: none; }
}