/* =============================================================================
 * jers.media — shared site stylesheet.
 * Built on tokens.css (loaded first). Component recipes lifted from the
 * design system's styleguide.html; no hex values live here except the ones
 * the signature effects hardcode by spec (DS §10).
 * ========================================================================== */

/* ---------------------------------------------------------------- base ---- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { max-width: 100%; }
body {
  max-width: 100%;
  overflow-x: hidden;               /* belt & braces — wide content scrolls inside its own block */
  background: var(--jm-bg-0);
  color: var(--jm-text);
  font-family: var(--jm-font-body);
  font-size: var(--jm-fs-base);
  line-height: var(--jm-lh-body);
}
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: 1080px; margin-inline: auto; padding-inline: var(--jm-sp-6); }
@media (max-width: 600px) { .wrap { padding-inline: var(--jm-sp-4); } }

p { max-width: 70ch; }
p + p { margin-top: var(--jm-sp-4); }
strong { font-weight: 600; }

h1, h2, h3 { font-family: var(--jm-font-display); font-weight: 700; }
h1 { font-size: var(--jm-fs-h1); line-height: var(--jm-lh-tight); }
h2 { font-size: var(--jm-fs-h2); line-height: var(--jm-lh-tight); margin-bottom: var(--jm-sp-6); }
h3 { font-size: var(--jm-fs-h3); line-height: var(--jm-lh-heading); margin: var(--jm-sp-12) 0 var(--jm-sp-4); }

.kicker {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs); font-weight: 500;
  letter-spacing: var(--jm-track-caps); text-transform: uppercase;
  color: var(--jm-accent); margin-bottom: var(--jm-sp-3); max-width: none;
}
.lead { font-size: var(--jm-fs-l); color: var(--jm-text-2); max-width: 64ch; }
.mono { font-family: var(--jm-font-mono); }
.muted { color: var(--jm-text-3); }
.microline {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs);
  color: var(--jm-text-3); letter-spacing: 0.04em; margin-top: var(--jm-sp-3);
}

/* ---------------------------------------------------------------- links --- */
.link {
  color: var(--jm-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.link:hover { text-decoration-thickness: 2px; text-shadow: var(--jm-glow-accent-text); }
.console {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  color: var(--jm-accent); text-decoration: none; padding: 1px 6px;
}
.console:hover { background: var(--jm-accent); color: var(--jm-on-accent); text-shadow: none; }

:focus-visible {
  outline: var(--jm-bw-focus) solid var(--jm-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  background: var(--jm-accent); color: var(--jm-on-accent);
  padding: 10px 18px; text-decoration: none;
}
.skip-link:focus-visible { left: var(--jm-sp-2); top: var(--jm-sp-2); }

/* ---------------------------------------------------------------- nav ----- */
.site-nav {
  position: sticky; top: 0; z-index: 20; height: 64px;
  background: var(--jm-panel-glass);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--jm-line);
}
.site-nav .nav-inner {
  max-width: 1080px; margin-inline: auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding-inline: var(--jm-sp-6); gap: var(--jm-sp-4);
}
@media (max-width: 600px) { .site-nav .nav-inner { padding-inline: var(--jm-sp-4); } }
.wordmark {
  font-family: var(--jm-font-display); font-weight: 700; font-size: 1.0625rem;
  letter-spacing: var(--jm-track-caps); color: var(--jm-text);
  text-decoration: none; white-space: nowrap;
}
.wordmark b { color: var(--jm-accent); font-weight: 700; text-shadow: var(--jm-glow-accent-text); }
.nav-links { display: flex; align-items: center; gap: var(--jm-sp-2); list-style: none; }
.nav-links a:not(.btn) {
  display: block; font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  letter-spacing: var(--jm-track-ui); text-transform: uppercase; text-decoration: none;
  color: var(--jm-text-2); padding: 6px 10px;
}
.nav-links a:not(.btn):hover { background: var(--jm-accent); color: var(--jm-on-accent); }
.nav-links a[aria-current="page"] { color: var(--jm-accent); box-shadow: inset 0 -2px 0 var(--jm-accent); }
.nav-links a[aria-current="page"]:hover { background: none; color: var(--jm-accent); }
.nav-links .btn { margin-left: var(--jm-sp-2); }
.menu-chip {
  display: none; font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  letter-spacing: var(--jm-track-ui); text-transform: uppercase;
  color: var(--jm-accent); border: 1px solid var(--jm-accent); border-radius: var(--jm-r-1);
  padding: 6px 10px; background: none; cursor: pointer; white-space: nowrap;
}
.menu-chip[aria-expanded="true"] { background: var(--jm-accent); color: var(--jm-on-accent); }

@media (max-width: 719px) {
  .menu-chip { display: block; }
  .nav-links {
    display: none;
    position: absolute; left: 0; right: 0; top: 64px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--jm-panel); border-bottom: 1px solid var(--jm-line);
    padding: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a:not(.btn), .nav-links .btn {
    display: flex; align-items: center; min-height: 48px;
    margin: 0; padding: 0 var(--jm-sp-6);
    border: none; border-radius: 0; border-top: 1px solid var(--jm-line-neutral);
    background: none; text-align: left;
  }
  .nav-links .btn { color: var(--jm-accent); }
  .nav-links a:not(.btn):hover, .nav-links .btn:hover {
    background: var(--jm-accent); color: var(--jm-on-accent); filter: none; box-shadow: none;
  }
  .nav-links a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--jm-accent); }
}

/* ---------------------------------------------------------------- buttons - */
.btn {
  display: inline-block; font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  font-weight: 500; letter-spacing: var(--jm-track-ui); text-transform: uppercase;
  text-decoration: none; text-align: center; cursor: pointer;
  padding: 10px 18px; border-radius: var(--jm-r-1); border: 1px solid transparent;
  background: none; color: inherit;
  transition: box-shadow var(--jm-t-1) var(--jm-ease-out), filter var(--jm-t-1) var(--jm-ease-out);
}
.btn-sm { padding: 6px 12px; font-size: var(--jm-fs-xs); }
.btn-primary { background: var(--jm-accent); border-color: var(--jm-accent); color: var(--jm-on-accent); }
.btn-primary:hover { filter: brightness(1.12); box-shadow: var(--jm-glow-1); }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary { border-color: var(--jm-accent); color: var(--jm-accent); transition: none; }
.btn-secondary:hover { background: var(--jm-accent); color: var(--jm-on-accent); } /* inverse video: snaps */
.btn-ghost { border-color: transparent; color: var(--jm-text-2); transition: none; }
.btn-ghost::before { content: '> '; color: var(--jm-text-3); }
.btn-ghost:hover { color: var(--jm-accent); }
.btn-ghost:hover::before { color: var(--jm-phosphor); }
.lc { text-transform: none; } /* e.g. an email address in a button chassis */

/* ---------------------------------------------------------------- sections  */
.section { padding-block: var(--jm-sp-16); }
.section-band { background: var(--jm-bg-1); }
@media (max-width: 719px) { .section { padding-block: var(--jm-sp-12); } }
.section-head { max-width: 70ch; }

/* split: prose beside media */
.split {
  display: grid; gap: var(--jm-sp-8); align-items: start;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  margin-top: var(--jm-sp-6);
}
.split.split-rev { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.split.split-rev .split-copy { order: 2; }
@media (max-width: 860px) {
  .split, .split.split-rev { grid-template-columns: minmax(0, 1fr); }
  .split.split-rev .split-copy { order: 0; }
}
.section-link { display: inline-block; margin-top: var(--jm-sp-6); }

/* wide media below prose */
.media-wide { margin-top: var(--jm-sp-8); }

/* ---------------------------------------------------------------- hero ---- */
.hero {
  padding-block: var(--jm-sp-16) var(--jm-sp-16);
  background:
    radial-gradient(ellipse at 20% 30%, rgba(255, 59, 77, 0.08), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(59, 139, 255, 0.08), transparent 50%),
    var(--jm-bg-0);
}
[data-theme='light'] .hero {
  background:
    radial-gradient(ellipse at 20% 30%, rgba(193, 31, 48, 0.05), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(26, 95, 208, 0.05), transparent 50%),
    var(--jm-bg-0);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) .hero {
    background:
      radial-gradient(ellipse at 20% 30%, rgba(193, 31, 48, 0.05), transparent 50%),
      radial-gradient(ellipse at 80% 70%, rgba(26, 95, 208, 0.05), transparent 50%),
      var(--jm-bg-0);
  }
}
.hero h1 { text-transform: uppercase; letter-spacing: 0.02em; max-width: 22ch; }
.hero .lead { margin-top: var(--jm-sp-4); }
.hero-actions { display: flex; gap: var(--jm-sp-3); flex-wrap: wrap; margin-top: var(--jm-sp-6); }
.hero-media { margin-top: var(--jm-sp-12); }
.hero-media.fx-glass { box-shadow: var(--jm-glow-2); } /* the viewport's ONE powered element */

/* page heroes without media (engineering / press) */
.hero-plain { padding-block: var(--jm-sp-16) var(--jm-sp-12); }

/* ---------------------------------------------------------------- cards --- */
.cardgrid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--jm-sp-6); margin-top: var(--jm-sp-6);
}
@media (max-width: 699px) { .cardgrid { grid-template-columns: minmax(0, 1fr); } }
.card {
  background: var(--jm-panel); border: 1px solid var(--jm-line);
  border-radius: var(--jm-r-2); padding: var(--jm-sp-6);
}
.card-kicker {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs); font-weight: 500;
  letter-spacing: var(--jm-track-caps); text-transform: uppercase; color: var(--jm-text-3);
  margin-bottom: var(--jm-sp-3);
}
.card-title {
  font-family: var(--jm-font-display); font-weight: 700;
  font-size: var(--jm-fs-h4); line-height: var(--jm-lh-heading);
  margin: 0 0 var(--jm-sp-2);
}
.card-body { color: var(--jm-text-2); font-size: var(--jm-fs-s); max-width: none; }

/* game styles (HOME §2) — mono-named entries */
.stylegrid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--jm-sp-6); margin-top: var(--jm-sp-6); list-style: none;
}
@media (max-width: 699px) { .stylegrid { grid-template-columns: minmax(0, 1fr); } }
.stylegrid li { border-top: 1px solid var(--jm-line); padding-top: var(--jm-sp-3); }
.stylegrid .style-name {
  display: block; font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  font-weight: 500; letter-spacing: var(--jm-track-ui); text-transform: uppercase;
  color: var(--jm-accent); margin-bottom: var(--jm-sp-2);
}
.stylegrid .style-blurb { color: var(--jm-text-2); font-size: var(--jm-fs-s); }

/* ---------------------------------------------------------------- figures - */
.fx-glass {
  position: relative; border-radius: var(--jm-r-glass);
  border: 1px solid var(--jm-line); overflow: hidden;
}
.fx-glass > img { border-radius: inherit; width: 100%; }
.fx-glass::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  border-radius: inherit;
  background:
    radial-gradient(140% 120% at 50% 48%, transparent 58%, rgba(0, 0, 0, 0.42) 100%),
    linear-gradient(105deg, rgba(255, 255, 255, 0.045) 0%, transparent 16%, transparent 82%, rgba(255, 255, 255, 0.03) 100%),
    repeating-linear-gradient(to bottom, transparent 0 2px, rgba(0, 0, 0, 0.2) 2px 3px);
}
[data-theme='light'] .fx-glass::after {
  background: repeating-linear-gradient(to bottom, transparent 0 2px, rgba(0, 0, 0, 0.08) 2px 3px);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) .fx-glass::after {
    background: repeating-linear-gradient(to bottom, transparent 0 2px, rgba(0, 0, 0, 0.08) 2px 3px);
  }
}
figure { margin: 0; }
figcaption {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs);
  color: var(--jm-text-3); line-height: 1.7; margin-top: var(--jm-sp-3);
}

/* press gallery */
.gallery { display: grid; gap: var(--jm-sp-12); margin-top: var(--jm-sp-8); }
.gallery figure { max-width: 960px; }
.gallery .natural-720 { max-width: 719px; }

/* ---------------------------------------------------------------- facts --- */
.factsheet { margin-top: var(--jm-sp-6); border-top: 1px solid var(--jm-line-neutral); max-width: 76ch; }
.fact-row {
  display: grid; grid-template-columns: 12rem minmax(0, 1fr); gap: var(--jm-sp-4);
  padding-block: var(--jm-sp-3); border-bottom: 1px solid var(--jm-line-neutral);
}
.fact-row dt {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs); font-weight: 500;
  letter-spacing: var(--jm-track-ui); text-transform: uppercase; color: var(--jm-text-3);
  padding-top: 3px;
}
.fact-row dd { color: var(--jm-text); font-size: var(--jm-fs-s); }
@media (max-width: 600px) {
  .fact-row { grid-template-columns: minmax(0, 1fr); gap: var(--jm-sp-1); }
}

/* paste-ready description panels */
.paste {
  background: var(--jm-panel); border: 1px solid var(--jm-line);
  border-radius: var(--jm-r-2); padding: var(--jm-sp-6);
  max-width: 76ch; margin-top: var(--jm-sp-4);
}
.paste p { max-width: none; }

/* ---------------------------------------------------------------- terminal  */
.term-block {
  background: var(--jm-term-bg); border: 1px solid var(--jm-ph-faint);
  border-radius: var(--jm-r-2); padding: var(--jm-sp-4); overflow-x: auto;
}
.term-block p {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-s);
  line-height: var(--jm-lh-mono); color: var(--jm-ph); text-shadow: var(--jm-glow-text);
  max-width: none; padding-left: 2ch; text-indent: -2ch; /* hanging > prompt */
}
.term-block p + p { margin-top: var(--jm-sp-2); }
.term-block .prompt { color: var(--jm-ph-dim); text-shadow: none; }
.status-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--jm-ph); box-shadow: var(--jm-glow-text); margin-right: 6px;
}
[data-theme='light'] .term-block p { color: #39ff88; text-shadow: none; }
[data-theme='light'] .term-block .prompt { color: rgba(57, 255, 136, 0.5); }
[data-theme='light'] .status-dot { background: #39ff88; box-shadow: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) .term-block p { color: #39ff88; text-shadow: none; }
  :root:not([data-theme='dark']) .term-block .prompt { color: rgba(57, 255, 136, 0.5); }
  :root:not([data-theme='dark']) .status-dot { background: #39ff88; box-shadow: none; }
}

/* ---------------------------------------------------------------- closing - */
.closing { text-align: center; padding-block: var(--jm-sp-16) var(--jm-sp-24); }
.closing .hero-actions { justify-content: center; }
.closing h2, .closing p { margin-inline: auto; }

/* ---------------------------------------------------------------- footer -- */
.site-footer { background: var(--jm-bg-0); padding-block: 0 var(--jm-sp-8); }
.site-footer .fx-trace { margin-block: 0 var(--jm-sp-8); }
.footer-grid {
  display: grid; gap: var(--jm-sp-8);
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  align-items: start;
}
@media (max-width: 719px) { .footer-grid { grid-template-columns: minmax(0, 1fr); } }
.footer-links { list-style: none; display: flex; flex-wrap: wrap; gap: var(--jm-sp-2) var(--jm-sp-4); }
.footer-legal {
  font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs);
  color: var(--jm-text-3); margin-top: var(--jm-sp-6);
}
.eot {
  text-align: center; font-family: var(--jm-font-mono); font-size: var(--jm-fs-xs);
  color: var(--jm-text-3); letter-spacing: var(--jm-track-caps); text-transform: uppercase;
  margin-top: var(--jm-sp-8); max-width: none;
}

/* =============================================================================
 * SIGNATURE EFFECTS (DS §10) — lifted from styleguide.html
 * ========================================================================== */

/* 10.1 PHOSPHOR BOOT */
.fx-boot {
  animation: jm-phosphor-boot var(--jm-t-scene) var(--jm-ease-out) both;
  animation-delay: calc(var(--boot-i, 0) * 140ms);
}
@keyframes jm-phosphor-boot {
  0%   { opacity: 0; }
  12%  { opacity: 1; color: #eaffff;
         text-shadow: 0 0 12px rgba(57, 255, 136, 0.9), 0 0 34px rgba(57, 255, 136, 0.45); }
  100% { color: inherit; text-shadow: 0 0 8px rgba(45, 226, 230, 0.25); }
}
[data-theme='light'] .fx-boot { animation: none; text-shadow: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme='dark']) .fx-boot { animation: none; text-shadow: none; }
}

/* 10.2 PACKET TRACE */
.fx-trace {
  border: none; height: 3px; position: relative; margin-block: var(--jm-sp-8);
  background: linear-gradient(var(--jm-line), var(--jm-line)) 0 1px / 100% 1px no-repeat;
}
.fx-trace::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, var(--jm-accent) 75%, var(--jm-phosphor)) no-repeat;
  background-size: 96px 3px; background-position: -96px 0;
  animation: jm-trace 3.2s linear infinite;
}
@keyframes jm-trace {
  from { background-position: -96px 0; }
  to   { background-position: calc(100% + 96px) 0; }
}
.fx-trace--static::after { animation: none; background-position: 70% 0; }
.fx-trace--handshake::after {
  background-image: linear-gradient(90deg, transparent, var(--jm-red) 75%, var(--jm-red-bright));
}
.fx-trace--handshake::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(270deg, transparent, var(--jm-blue) 75%, var(--jm-blue-bright)) no-repeat;
  background-size: 96px 3px; background-position: calc(100% + 96px) 0;
  animation: jm-trace-rtl 3.2s linear 1.6s infinite;
}
@keyframes jm-trace-rtl {
  from { background-position: calc(100% + 96px) 0; }
  to   { background-position: -96px 0; }
}
/* designed static fallback: the packet parks on the wire — a logged packet,
   not an empty line (DS §10.2) */
@media (prefers-reduced-motion: reduce) {
  .fx-trace::after { animation: none; background-position: 70% 0; }
  .fx-trace--handshake::before { animation: none; background-position: 30% 0; }
}