/* ============================================================
   Reset & base
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ============================================================
   Custom properties — high-contrast colour palette
   ============================================================ */
:root {
  --color-bg: #0d0d0d;
  --color-surface: #1a1a1a;
  --color-surface-soft: #161b23;
  --color-surface-hover: #262626;
  --color-border: #444444;
  --color-border-bright: #5f93ad;
  --color-text: #f0f0f0;
  --color-text-muted: #b0b0b0;
  --color-accent: #4fc3f7;
  --color-accent-hover: #81d4fa;
  --color-accent-active: #0288d1;
  --color-error: #ff6b6b;
  --color-focus-ring: #ffdd57;

  --font-family: "Segoe UI", Arial, sans-serif;
  --font-size-base: 1.125rem; /* 18 px — easier to read */
  --line-height: 1.7;
  --max-width: 1024px;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 3rem;
  --section-space: 2.75rem;
  --radius: 6px;
  --shadow-soft: 0 10px 20px rgba(0, 0, 0, 0.32);
  --shadow-hover: 0 16px 30px rgba(0, 0, 0, 0.46);
}

/* ============================================================
   Accessibility helper
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Skip link
   ============================================================ */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-focus-ring);
  color: #000;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  z-index: 9999;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: var(--spacing-sm);
  left: var(--spacing-sm);
}

/* ============================================================
   Global focus style — visible for keyboard / screen reader
   ============================================================ */
:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 3px;
}

/* ============================================================
   Body & typography
   ============================================================ */
body {
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 10% -10%, rgba(79, 195, 247, 0.16), transparent 45%),
    radial-gradient(circle at 90% 10%, rgba(79, 195, 247, 0.08), transparent 30%),
    linear-gradient(180deg, #0d0d0d 0%, #12151b 100%);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(1.8rem, 5vw, 2.75rem);
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: var(--spacing-md);
  border-left: 4px solid var(--color-accent);
  padding-left: 0.6rem;
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-accent);
  text-decoration: underline;
}

a:hover,
a:focus {
  color: var(--color-accent-hover);
}

a:active {
  color: var(--color-accent-active);
}

/* ============================================================
   Layout container
   ============================================================ */
header,
nav,
main,
footer {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--spacing-md);
}

/* ============================================================
   Header
   ============================================================ */
header {
  padding-block: 2rem 0.65rem;
  border-bottom: 2px solid var(--color-border);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  position: relative;
  isolation: isolate;
}

.header-inner::before {
  content: "";
  position: absolute;
  inset: -0.5rem -0.3rem 0.5rem;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 20%, rgba(79, 195, 247, 0.14), transparent 56%),
    radial-gradient(circle at 78% 35%, rgba(79, 195, 247, 0.08), transparent 50%);
  opacity: 0.85;
  pointer-events: none;
}

.tagline {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 0;
}

.hero-description {
  max-width: 620px;
  margin-bottom: 0;
}

.hero-cta {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius);
  border: 2px solid transparent;
  background: linear-gradient(180deg, var(--color-accent), #3db9ef);
  color: #071019;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.hero-cta:hover,
.hero-cta:focus {
  background: linear-gradient(180deg, var(--color-accent-hover), var(--color-accent));
  color: #071019;
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-cta:focus-visible {
  border-color: var(--color-focus-ring);
}

.hero-wave {
  margin-top: 0.1rem;
  width: min(100%, 620px);
  height: 24px;
  border-radius: 999px;
  position: relative;
  opacity: 0.62;
  overflow: hidden;
}

.hero-wave::before,
.hero-wave::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      transparent 38%,
      rgba(79, 195, 247, 0.2) 40%,
      rgba(79, 195, 247, 0.2) 60%,
      transparent 62%
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0 6px,
      rgba(79, 195, 247, 0.3) 6px 8px,
      transparent 8px 14px,
      rgba(79, 195, 247, 0.12) 14px 16px,
      transparent 16px 22px
    );
  transform-origin: 50% 50%;
}

.hero-wave::before {
  animation: waveformPulse 8.5s ease-in-out infinite;
}

.hero-wave::after {
  opacity: 0.72;
  animation: waveformPulseAlt 11s ease-in-out infinite;
}

/* ============================================================
   Navigation
   ============================================================ */
nav {
  padding-block: 0.5rem var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  font-weight: 700;
  padding: 0.6rem 1rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius);
  border: 1px solid transparent;
  position: relative;
  transition:
    color 0.18s ease,
    border-color 0.18s ease,
    background-color 0.18s ease,
    transform 0.18s ease;
}

nav a:hover,
nav a:focus {
  border-color: var(--color-accent);
  background-color: rgba(79, 195, 247, 0.14);
  color: var(--color-accent-hover);
  text-decoration: none;
  transform: translateY(-1px);
}

nav a::after {
  content: "";
  position: absolute;
  left: 0.65rem;
  right: 0.65rem;
  bottom: 0.35rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-accent-hover);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

nav a:hover::after,
nav a:focus::after,
nav a[aria-current="true"]::after {
  transform: scaleX(1);
}

nav a:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
}

nav a[aria-current="true"] {
  border-color: var(--color-accent-hover);
  background-color: rgba(79, 195, 247, 0.26);
  color: var(--color-accent-hover);
}

/* ============================================================
   Main sections
   ============================================================ */
main section {
  padding-block: var(--section-space);
  border-bottom: 1px solid var(--color-border);
}

.section-helper,
.section-intro {
  color: var(--color-text);
  font-weight: 600;
  max-width: 70ch;
  margin-bottom: 1rem;
}

.section-helper {
  color: var(--color-text-muted);
  font-weight: 400;
}

.contributors-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  list-style: none;
  padding-left: 0;
}

.contributor-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  background-color: var(--color-surface-soft);
}

.contributor-name {
  font-size: 1.08rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}

.contributor-role {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 0;
}

main section:last-child {
  border-bottom: none;
}

/* ============================================================
   Game cards
   ============================================================ */
#games-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 500px), 1fr));
  gap: var(--spacing-md);
  justify-content: center;
  justify-items: center;
}

#games-list.games-list--single {
  grid-template-columns: minmax(0, 680px);
}

.game-card {
  background:
    linear-gradient(180deg, rgba(79, 195, 247, 0.06) 0%, rgba(79, 195, 247, 0.01) 35%),
    var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--spacing-md);
  width: 100%;
  max-width: 680px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease;
}

.game-card:hover {
  background-color: var(--color-surface-hover);
  transform: translateY(-5px);
  border-color: #6ea3bf;
  box-shadow: var(--shadow-hover);
}

.game-card:focus-within {
  border-color: var(--color-border-bright);
  box-shadow: 0 0 0 2px rgba(79, 195, 247, 0.22);
}

.game-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem 0.65rem;
  margin-bottom: var(--spacing-sm);
}

.game-card__version-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(129, 212, 250, 0.75);
  background-color: rgba(79, 195, 247, 0.2);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.game-card__description {
  margin-bottom: var(--spacing-md);
}

.game-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.game-card__metadata-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.5rem;
  margin-bottom: var(--spacing-sm);
}

.game-card__metadata-item {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(95, 147, 173, 0.55);
  background-color: rgba(79, 195, 247, 0.08);
  color: var(--color-text-muted);
  font-size: 0.83rem;
  font-weight: 600;
}

.game-card__download {
  display: inline-block;
  padding: 0.9rem 1.65rem;
  background-color: var(--color-accent);
  color: #000;
  font-weight: 800;
  font-size: 0.96rem;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  flex: 1 1 12rem;
  text-align: center;
  min-height: 3rem;
  line-height: 1.2;
  box-shadow: var(--shadow-soft);
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.game-card__download:hover,
.game-card__download:focus {
  background-color: var(--color-accent-hover);
  border-color: rgba(255, 255, 255, 0.42);
  color: #000;
  text-decoration: none;
  transform: translateY(-1px);
}

.game-card__download:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 3px;
}

.game-card__download:active {
  background-color: var(--color-accent-active);
  color: #fff;
}

.platform-icon {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  margin-right: 0.45rem;
  flex: 0 0 auto;
  vertical-align: -0.15em;
}

/* ============================================================
   Error message
   ============================================================ */
.error-message {
  color: var(--color-error);
  font-weight: 600;
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  padding-block: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  text-align: left;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.footer-copyright {
  margin-bottom: var(--spacing-sm);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  margin: 0;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus {
  border-color: var(--color-accent);
  background-color: rgba(79, 195, 247, 0.12);
  text-decoration: none;
}

.contact-email-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  margin-top: 0.3rem;
  padding: 0.7rem 1.1rem;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
}

.contact-email-button:hover,
.contact-email-button:focus {
  background-color: rgba(79, 195, 247, 0.12);
  text-decoration: none;
  transform: translateY(-1px);
}

/* ============================================================
   Responsive adjustments
   ============================================================ */
@media (min-width: 600px) {
  #games-list {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 500px), 1fr));
  }

  #games-list.games-list--single {
    justify-content: center;
  }

  .contributors-list {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
}

@media (min-width: 980px) {
  #games-list {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 540px), 1fr));
  }
}

@keyframes waveformPulse {
  0%,
  100% {
    transform: scaleY(0.94);
    opacity: 0.8;
  }

  50% {
    transform: scaleY(1.04);
    opacity: 1;
  }
}

@keyframes waveformPulseAlt {
  0%,
  100% {
    transform: scaleY(1.02);
    opacity: 0.62;
  }

  50% {
    transform: scaleY(0.95);
    opacity: 0.88;
  }
}

/* ============================================================
   Reduced-motion support
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .game-card:hover,
  .hero-cta:hover,
  .hero-cta:focus,
  .game-card__download:hover,
  .game-card__download:focus,
  .contact-email-button:hover,
  .contact-email-button:focus,
  nav a:hover,
  nav a:focus,
  .hero-wave::before,
  .hero-wave::after {
    transform: none;
  }

  .hero-wave::before,
  .hero-wave::after {
    animation: none;
  }
}