/* Silver Palace Guide — visual system derived from official key art (see _research/visual.md) */

:root {
  --bg: #efe9dd;
  --bg-soft: #e5dccb;
  --surface: #fbf7ef;
  --ink: #141a1f;
  --ink-soft: #5a6470;
  --line: #cdc2ad;
  --accent: #2f4a63;
  --accent-wash: #dbe3ea;
  --gold: #7a5c33;
  --danger: #7a2f2f;
  --radius: 6px;
  --shadow: 0 1px 0 rgba(20, 26, 31, .04), 0 10px 26px rgba(20, 26, 31, .06);
  --wrap: 1080px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --bg: #0e1418;
  --bg-soft: #141a20;
  --surface: #161d23;
  --ink: #e7e2d8;
  --ink-soft: #a8b3bf;
  --line: #2b3742;
  --accent: #8fa6bd;
  --accent-wash: #1e2a35;
  --gold: #d9ccbb;
  --danger: #c98a8a;
  --shadow: 0 1px 0 rgba(0, 0, 0, .3), 0 10px 30px rgba(0, 0, 0, .35);
}

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

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

body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 15% -10%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 70%),
    radial-gradient(700px 420px at 95% 0%, color-mix(in srgb, var(--gold) 6%, transparent), transparent 70%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

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

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--surface); color: var(--ink);
  padding: .6rem 1rem; z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 1.25rem; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 1rem; min-height: 66px; }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); text-decoration: none; flex-shrink: 0; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px;
  border: 1px solid var(--accent);
  background: var(--accent-wash);
  color: var(--accent);
  transform: rotate(45deg);
}
.brand-mark svg { width: 17px; height: 17px; transform: rotate(-45deg); }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1rem; letter-spacing: .01em; }
.brand-sub { font-size: .7rem; color: var(--ink-soft); letter-spacing: .06em; text-transform: uppercase; }

.main-nav { display: flex; flex-wrap: wrap; gap: .1rem; margin-left: auto; }
.main-nav a {
  color: var(--ink-soft); text-decoration: none;
  font-size: .82rem; letter-spacing: .04em; text-transform: uppercase;
  padding: .45rem .6rem; border-bottom: 2px solid transparent;
}
.main-nav a:hover { color: var(--ink); border-bottom-color: var(--line); }
.main-nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

.header-actions { display: flex; gap: .35rem; }
.icon-btn {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--ink); cursor: pointer;
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.menu-btn { display: none; }

/* hero */
.hero { padding: 3.2rem 0 1.8rem; max-width: 820px; }
.hero--home { padding-top: 3.6rem; max-width: 900px; }
.eyebrow {
  display: inline-block; margin: 0 0 .9rem;
  padding: .18rem .55rem;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: .7rem; letter-spacing: .14em; text-transform: uppercase;
}
.eyebrow::before { content: "◆"; margin-right: .45rem; color: var(--gold); }
h1, h2, h3 { line-height: 1.25; }
h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.3vw, 3.05rem);
  font-weight: 700; letter-spacing: -.015em;
  margin: 0 0 .85rem;
}
h2 { font-family: var(--font-display); font-size: 1.4rem; margin: 0 0 .9rem; }
h3 { font-size: 1.02rem; margin: 0 0 .35rem; }
.lede { font-size: 1.08rem; color: var(--ink-soft); margin: 0 0 1.2rem; }

.btn {
  display: inline-block; padding: .62rem 1.15rem;
  border-radius: var(--radius); border: 1px solid var(--accent);
  background: var(--accent); color: var(--bg);
  text-decoration: none; font-weight: 600; font-size: .9rem;
  letter-spacing: .03em;
}
.btn:hover { background: transparent; color: var(--accent); }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--accent-wash); }

.hero-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.4rem; }

/* facts strip */
.fact-strip {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px; margin: 1.8rem 0 0;
  border: 1px solid var(--line); background: var(--line);
}
.fact-strip div { padding: .9rem 1rem; background: var(--surface); }
.fact-strip dt { font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); margin: 0 0 .2rem; }
.fact-strip dd { margin: 0; font-weight: 600; font-size: .95rem; }

/* cards */
.card-group { padding: 2rem 0 1.6rem; border-top: 1px solid var(--line); }
.card-group-head { display: flex; align-items: baseline; gap: .75rem; margin-bottom: 1rem; }
.card-group-head h2 { margin: 0; }
.card-group-head p { margin: 0; color: var(--ink-soft); font-size: .85rem; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; }
.link-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .2rem 2rem; }
.link-item { display: block; padding: .5rem 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.link-item strong { display: block; font-size: .92rem; color: var(--ink); }
.link-item span { display: block; margin-top: .12rem; font-size: .78rem; color: var(--ink-soft); }
.link-item:hover strong { color: var(--accent); }
@media (max-width: 720px) {
  .link-list { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .link-list { grid-template-columns: 1fr; }
}
.card {
  position: relative;
  display: flex; flex-direction: column;
  padding: 1.2rem 1.2rem 1.1rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink); text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform .16s ease, border-color .16s ease;
}
.card::before {
  content: ""; position: absolute; left: 0; right: 0; top: -1px;
  height: 3px; background: var(--accent); opacity: .55;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }
.card:hover::before { opacity: 1; }
.card p { margin: 0; color: var(--ink-soft); font-size: .88rem; }
.card-tag {
  align-self: flex-start; margin-bottom: .55rem;
  padding: .1rem .45rem;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--ink-soft);
  font-size: .66rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
}
.card-index { margin-left: auto; color: var(--ink-soft); font-family: var(--font-mono); font-size: .7rem; }

/* article */
.article-head { padding: 2.1rem 0 1.1rem; max-width: 800px; }
.meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; color: var(--ink-soft); font-size: .8rem; }
.badge {
  padding: .1rem .5rem; border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
}

.quick-answer {
  max-width: 800px;
  margin: 1.2rem 0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--gold);
  background: color-mix(in srgb, var(--gold) 7%, var(--surface));
  border-radius: 0 var(--radius) var(--radius) 0;
}
.quick-answer p { margin: 0; font-size: .97rem; }
.quick-answer strong { color: var(--ink); }

.keybox {
  max-width: 800px;
  margin: 1.3rem 0;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-left: 4px double var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.keybox h2 {
  font-family: var(--font); font-size: .72rem; font-weight: 700;
  margin: 0 0 .7rem; text-transform: uppercase; letter-spacing: .14em; color: var(--ink-soft);
}
.keybox dl { display: grid; grid-template-columns: max-content 1fr; gap: .4rem 1.1rem; margin: 0; font-size: .92rem; }
.keybox dt { color: var(--ink-soft); }
.keybox dd { margin: 0; }

.prose { max-width: 800px; padding-bottom: 2rem; }
.prose h2 {
  margin-top: 2.4rem; padding-top: .5rem;
  padding-left: 1.15rem; position: relative;
}
.prose h2::before {
  content: "◆"; position: absolute; left: 0; top: .55rem;
  color: var(--gold); font-size: .8rem;
}
.prose h3 { margin-top: 1.6rem; color: var(--ink); }
.prose p, .prose li { color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.25rem; margin: 1rem 0; }
.prose li { margin: .35rem 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: .9rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: .55rem .65rem; text-align: left; vertical-align: top; }
.prose th { background: var(--bg-soft); font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; font-weight: 700; }
.prose tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--bg-soft) 45%, transparent); }
.prose code { padding: .08rem .3rem; border-radius: 3px; background: var(--bg-soft); font-size: .88em; font-family: var(--font-mono); }
.prose kbd, .quick-answer kbd {
  display: inline-block; min-width: 1.5em; padding: .05rem .35rem;
  border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px;
  background: var(--surface); font-family: var(--font-mono); font-size: .82em; text-align: center;
}
.legal { max-width: 800px; padding-bottom: 2.5rem; }
.legal h2 { font-size: 1.15rem; margin-top: 2rem; }
.legal p, .legal li { color: var(--ink); }
.legal ul { padding-left: 1.2rem; }
.legal li { margin: .4rem 0; }
.prose strong { font-weight: 700; }

.note {
  margin: 1.2rem 0; padding: .85rem 1rem;
  border: 1px dashed var(--line); border-radius: var(--radius);
  background: var(--bg-soft);
  font-size: .9rem; color: var(--ink-soft);
}
.note strong { color: var(--ink); }

/* figures */
.page-figure { margin: 1.6rem 0; }
.page-figure img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.page-figure figcaption { margin-top: .5rem; font-size: .78rem; color: var(--ink-soft); letter-spacing: .01em; }

/* FAQ */
.faq-list { margin: 1.2rem 0; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); padding: .9rem 0; }
.faq-item h3 { margin: 0 0 .35rem; font-size: .98rem; }
.faq-item p { margin: 0; color: var(--ink-soft); font-size: .93rem; }

/* ad slots */
.ad-slot {
  display: grid; place-items: center;
  margin: 1.6rem auto;
  width: 100%; max-width: 970px;
  min-height: 90px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--bg-soft) 50%, transparent);
  color: var(--ink-soft);
  text-align: center;
  overflow: hidden;
}
/* Placeholders stay in the markup but are not rendered until a real ad fills them.
   Add the "is-filled" class (and remove the placeholder text) when AdSense is live. */
.ad-slot:not(.is-filled) { display: none; }
.ad-slot.is-filled { border: 0; background: transparent; min-height: 0; }
.ad-slot--rectangle { max-width: 336px; min-height: 280px; }
.ad-label {
  display: block; margin-bottom: .3rem;
  font-size: .62rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft);
}
.ad-slot p { margin: 0; font-size: .72rem; }

/* newsletter */
.subscribe {
  max-width: 800px; margin: 2rem 0 1rem;
  padding: 1.4rem 1.3rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.subscribe h2 { font-family: var(--font-display); font-size: 1.15rem; margin: 0 0 .35rem; }
.subscribe p { margin: 0 0 .9rem; color: var(--ink-soft); font-size: .9rem; }
.nl-form { display: flex; flex-wrap: wrap; gap: .5rem; }
.nl-form input[type="email"] {
  flex: 1 1 240px; min-width: 0;
  padding: .6rem .75rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg); color: var(--ink);
  font: inherit; font-size: .9rem;
}
.nl-form input[type="email"]:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.nl-form button {
  padding: .6rem 1.1rem;
  border: 1px solid var(--accent); border-radius: var(--radius);
  background: var(--accent); color: var(--bg);
  font: inherit; font-size: .88rem; font-weight: 600; cursor: pointer;
}
.nl-form button:hover { background: transparent; color: var(--accent); }
.nl-form[hidden] { display: none; }
.nl-note { margin: .6rem 0 0; font-size: .76rem; color: var(--ink-soft); }
.nl-status { margin: .7rem 0 0; font-size: .88rem; }
.nl-status:empty { display: none; }
.nl-status.is-ok { color: var(--accent); font-weight: 600; }
.nl-status.is-err { color: #a33a2a; }
.nl-status a { color: inherit; }

/* breadcrumb */
.breadcrumb { padding: 1rem 0 0; font-size: .78rem; color: var(--ink-soft); }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: .4rem; list-style: none; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "›"; margin-right: .4rem; color: var(--line); }
.breadcrumb a { color: var(--ink-soft); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }

/* related */
.related { max-width: 800px; margin: 1rem 0 2.5rem; padding-top: 1.4rem; border-top: 1px solid var(--line); }
.related h2 { font-family: var(--font); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-soft); }
.related ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: .5rem; }
.related a { display: block; padding: .7rem .85rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); text-decoration: none; font-size: .9rem; }
.related a:hover { border-color: var(--accent); }

/* footer */
.site-footer { margin-top: 3rem; border-top: 1px solid var(--line); background: var(--bg-soft); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 2rem; justify-content: space-between; padding-top: 2.2rem; padding-bottom: 1.5rem; }
.footer-brand { max-width: 360px; }
.footer-note { color: var(--ink-soft); font-size: .82rem; margin: .4rem 0 0; }
.footer-cols { display: flex; flex-wrap: wrap; gap: 2.5rem; }
.footer-cols a { display: block; color: var(--ink-soft); text-decoration: none; font-size: .84rem; padding: .14rem 0; }
.footer-cols a:hover { color: var(--accent); }
.footer-head { margin: 0 0 .45rem; font-size: .7rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink); }
.footer-base { padding-top: 1rem; padding-bottom: 1.6rem; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: .76rem; }
.footer-base p { margin: 0; }
.footer-guides { padding-top: .2rem; padding-bottom: 1.4rem; }
.footer-guide-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem 2rem; }
.footer-guide-cols a { display: block; color: var(--ink-soft); text-decoration: none; font-size: .82rem; padding: .12rem 0; }
.footer-guide-cols a:hover { color: var(--accent); }
@media (max-width: 640px) {
  .footer-guide-cols { grid-template-columns: 1fr 1fr; }
}

/* responsive */
@media (max-width: 900px) {
  .menu-btn { display: grid; }
  .main-nav {
    display: none; position: absolute; left: 1rem; right: 1rem; top: calc(100% + .4rem);
    padding: .5rem; border: 1px solid var(--line); border-radius: var(--radius);
    background: var(--surface); box-shadow: var(--shadow); flex-direction: column;
  }
  .main-nav.is-open { display: flex; }
  .header-inner { position: relative; }
  .keybox dl { grid-template-columns: 1fr; gap: .1rem; }
  .keybox dd { margin-bottom: .55rem; }
  .prose table { display: block; overflow-x: auto; }
  .ad-slot { min-height: 100px; }
  .ad-slot--rectangle { min-height: 250px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .fact-strip { grid-template-columns: 1fr 1fr; }
  .footer-cols { gap: 1.5rem; }
}

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