/* ── Header ─────────────────────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(254, 254, 229, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-outline);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-on-surface);
}

.site-header__logo img {
  height: 48px;
  width: auto;
}

.site-header__logo span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface);
  text-decoration: none;
  transition: color 0.2s;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--color-outline);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  cursor: pointer;
  color: var(--color-on-surface);
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  margin: 4px 0;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(254, 254, 229, 0.97);
    backdrop-filter: blur(16px);
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--color-outline);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ── Glass Card ─────────────────────────────────────────────────────────── */

.glass-card {
  background: rgba(254, 254, 229, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-soft);
}

/* ── Pill Button ────────────────────────────────────────────────────────── */

.pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 56px;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow-soft);
  transition: transform 0.06s ease;
  -webkit-text-stroke: 0.5px var(--color-outline-dark);
  paint-order: stroke fill;
}

.pill-btn:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.pill-btn--primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: 3px solid rgba(255, 255, 255, 0.85);
  box-shadow:
    inset 0 -4px 0 var(--color-primary-dim),
    var(--shadow-soft);
}

.pill-btn--primary:hover {
  background: var(--color-primary-dim);
  text-decoration: none;
  color: var(--color-on-primary);
}

.pill-btn--secondary {
  background: var(--color-secondary);
  color: var(--color-on-primary);
  border: 3px solid rgba(255, 255, 255, 0.85);
  box-shadow:
    inset 0 -4px 0 #0f4a5a,
    var(--shadow-soft);
}

.pill-btn--secondary:hover {
  background: #145a6e;
  text-decoration: none;
  color: var(--color-on-primary);
}

.pill-btn--disabled,
.pill-btn:disabled {
  background: #5a6268;
  color: rgba(255, 255, 255, 0.7);
  border: 3px solid rgba(255, 255, 255, 0.4);
  box-shadow: inset 0 -4px 0 #343a40, var(--shadow-soft);
  cursor: not-allowed;
  opacity: 0.85;
}

.pill-btn--disabled:hover,
.pill-btn:disabled:hover {
  text-decoration: none;
  color: rgba(255, 255, 255, 0.7);
}

.pill-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */

.hero {
  padding: 4rem 0 5rem;
  text-align: center;
}

.hero__logo {
  max-width: min(320px, 80vw);
  margin-inline: auto;
}

.hero__logo--game {
  max-width: min(280px, 70vw);
}

.hero__tagline {
  margin-top: 1.5rem;
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.5vw, 1.375rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-on-surface-variant);
  font-style: italic;
}

.hero__actions {
  margin-top: 2rem;
}

.hero--game {
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
}

.hero--game::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/chess-td/background_100hp.png") center / cover no-repeat;
  z-index: 0;
}

.hero--game::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(254, 254, 229, 0.3) 0%,
    rgba(254, 254, 229, 0.85) 70%,
    var(--color-surface) 100%
  );
  z-index: 1;
}

.hero--game .container {
  position: relative;
  z-index: 2;
}

/* ── Featured Game Card ───────────────────────────────────────────────────── */

.featured-game {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .featured-game {
    grid-template-columns: 1fr 1.2fr;
  }
}

.featured-game__art {
  text-align: center;
}

.featured-game__art img {
  max-width: 260px;
  margin-inline: auto;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.2));
}

.featured-game__content h3 {
  margin-bottom: 0.75rem;
}

.featured-game__content p {
  margin-bottom: 1.5rem;
}

/* ── Dark Panel ─────────────────────────────────────────────────────────── */

.dark-panel {
  background: var(--color-dark-panel);
  border: 2px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  box-shadow: 0 0 24px rgba(229, 193, 88, 0.15);
}

.dark-panel h2,
.dark-panel h3 {
  color: var(--color-gold);
}

.dark-panel p,
.dark-panel li {
  color: rgba(254, 254, 229, 0.85);
}

.dark-panel ul {
  list-style: none;
  margin-top: 1.5rem;
}

.dark-panel li {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(229, 193, 88, 0.2);
  padding-left: 1.5rem;
  position: relative;
}

.dark-panel li::before {
  content: "♞";
  position: absolute;
  left: 0;
  color: var(--color-gold);
}

.dark-panel li:last-child {
  border-bottom: none;
}

/* ── Features Grid ────────────────────────────────────────────────────────── */

.features-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background: var(--color-surface-container-high);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
}

.feature-card__icon {
  height: 80px;
  width: auto;
  margin-inline: auto;
  margin-bottom: 1rem;
  object-fit: contain;
}

.feature-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.feature-card p {
  font-size: 0.875rem;
}

/* ── Screenshot Gallery ───────────────────────────────────────────────────── */

.gallery {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 1rem;
  -webkit-overflow-scrolling: touch;
}

.gallery__item {
  flex: 0 0 min(220px, 70vw);
  scroll-snap-align: start;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-outline);
  box-shadow: var(--shadow-soft);
}

.gallery__item img {
  width: 100%;
  height: auto;
}

@media (min-width: 768px) {
  .gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    overflow-x: visible;
    scroll-snap-type: none;
  }

  .gallery__item {
    flex: unset;
  }
}

/* ── Gameplay Video ───────────────────────────────────────────────────────── */

.video-wrap {
  max-width: 420px;
  margin-inline: auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-outline);
  box-shadow: var(--shadow-medium);
  background: #000;
}

.video-wrap video {
  display: block;
  width: 100%;
  height: auto;
}

/* ── About ────────────────────────────────────────────────────────────────── */

.about-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.about-grid p + p {
  margin-top: 1rem;
}

/* ── Download Section ─────────────────────────────────────────────────────── */

.download-section {
  text-align: center;
}

.download-section p {
  margin-bottom: 1.5rem;
}

.download-section .pill-btn-group {
  margin-top: 0.5rem;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */

.site-footer {
  background: var(--color-on-surface);
  color: rgba(254, 254, 229, 0.7);
  padding: 2.5rem 0;
  text-align: center;
}

.site-footer a {
  color: var(--color-gold);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.site-footer__nav a {
  font-family: var(--font-display);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
}

.site-footer__nav a:hover {
  text-decoration: underline;
}

.site-footer__copy {
  font-size: 0.875rem;
}

/* ── Scroll Reveal ────────────────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}