/* Obsidian Crown Chess — public site */
:root {
  --bg: #050507;
  --bg-elevated: #0c0c10;
  --bg-card: #121218;
  --ink: #f2ece6;
  --ink-muted: #a89f96;
  --ink-dim: #6e675f;
  --crimson: #c41e3a;
  --crimson-bright: #e8364f;
  --crimson-soft: rgba(196, 30, 58, 0.18);
  --gold: #c9a227;
  --gold-soft: rgba(201, 162, 39, 0.22);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(196, 30, 58, 0.45);
  --radius: 14px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
  --max: 1120px;
  --font-display: "Cinzel", "Times New Roman", serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  background:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(196, 30, 58, 0.18), transparent 60%),
    radial-gradient(ellipse 700px 400px at 90% 20%, rgba(201, 162, 39, 0.06), transparent 50%),
    radial-gradient(ellipse 600px 500px at 10% 80%, rgba(196, 30, 58, 0.08), transparent 55%),
    var(--bg);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--crimson-bright);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--crimson);
  color: white;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(5, 5, 7, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  font-size: 0.95rem;
}

.brand:hover {
  text-decoration: none;
  color: var(--crimson-bright);
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 0 0 1px var(--line-strong), 0 0 20px rgba(196, 30, 58, 0.35);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.92rem;
}

.nav-links a {
  color: var(--ink-muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(180deg, var(--crimson-bright), var(--crimson));
  color: #fff;
  box-shadow: 0 10px 30px rgba(196, 30, 58, 0.35);
}

.btn-primary:hover {
  color: #fff;
  box-shadow: 0 14px 36px rgba(196, 30, 58, 0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  color: var(--ink);
  background: var(--crimson-soft);
  border-color: var(--crimson);
}

.btn-small {
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
}

/* Hero */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2.5rem;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--gold-soft);
  background: rgba(201, 162, 39, 0.08);
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0.04em;
  color: var(--crimson-bright);
  text-shadow: 0 0 40px rgba(196, 30, 58, 0.35);
}

.hero-lead {
  margin: 0 0 1.5rem;
  color: var(--ink-muted);
  font-size: 1.15rem;
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.meta-row strong {
  color: var(--ink-muted);
  font-weight: 600;
}

.hero-visual {
  position: relative;
}

.hero-frame {
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow), 0 0 0 1px rgba(201, 162, 39, 0.08);
  background: var(--bg-card);
}

.hero-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center top;
}

.hero-badge {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(5, 5, 7, 0.82);
  border: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--ink-muted);
  backdrop-filter: blur(8px);
}

/* Sections */
section {
  padding: 3.25rem 1.25rem;
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: 0.06em;
  color: var(--ink);
}

.section-head p {
  margin: 0;
  color: var(--ink-muted);
}

.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

/* Feature grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.3rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.card h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--crimson-bright);
}

.card p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.98rem;
}

.card .icon {
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  border-radius: 10px;
  background: var(--crimson-soft);
  border: 1px solid var(--line-strong);
  color: var(--crimson-bright);
  font-size: 1.1rem;
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
}

.gallery-main,
.gallery-side figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-card);
  box-shadow: var(--shadow);
}

.gallery-side {
  display: grid;
  gap: 1rem;
}

.gallery figcaption {
  padding: 0.7rem 0.9rem;
  font-size: 0.85rem;
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
}

.gallery img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center top;
}

/* Steps */
.steps {
  display: grid;
  gap: 0.9rem;
  counter-reset: step;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1.15rem 1.2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
}

.step::before {
  counter-increment: step;
  content: counter(step);
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--crimson);
  color: white;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.step h3 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--ink-muted);
}

.step code,
code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.88em;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.1em 0.4em;
  color: #f0d9a8;
}

/* Two column */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
}

.panel h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  color: var(--gold);
  font-size: 1.05rem;
}

.panel ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-muted);
}

.panel li + li {
  margin-top: 0.45rem;
}

/* Download CTA */
.download-box {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  align-items: center;
  padding: 1.75rem;
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(ellipse at 0% 0%, rgba(196, 30, 58, 0.22), transparent 55%),
    var(--bg-card);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow);
}

.download-box h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}

.download-box p {
  margin: 0 0 1rem;
  color: var(--ink-muted);
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  align-items: stretch;
}

.note {
  font-size: 0.88rem;
  color: var(--ink-dim);
}

.kbd {
  display: inline-block;
  padding: 0.1em 0.45em;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.85em;
}

/* Table */
.specs {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

.specs th,
.specs td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
}

.specs th {
  width: 34%;
  color: var(--ink-muted);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
}

.specs tr:last-child th,
.specs tr:last-child td {
  border-bottom: none;
}

/* Footer */
footer {
  padding: 2.5rem 1.25rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.footer-inner a {
  color: var(--ink-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .hero,
  .gallery,
  .split,
  .download-box,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2.25rem;
  }

  .nav-links {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}