/* ==========================================================================
   RETRO.GAMES — site stylesheet
   Design language: modern dark minimalism with ZX Spectrum signatures.
   Signatures: Sinclair rainbow stripe, pixel-font eyebrow labels,
   tape-loading animated bars, Spectrum-screen accent palette.
   ========================================================================== */

/* --------------------------------------------------------------------------
   0. Self-hosted fonts (latin subsets; Inter & Space Grotesk are variable)
   -------------------------------------------------------------------------- */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url("../fonts/space-grotesk-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Press Start 2P";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/press-start-2p-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  color-scheme: dark;

  /* Surfaces & text */
  --bg: #0a0b0f;
  --panel: #12141c;
  --panel-2: #171a24;
  --line: #262b3a;
  --ink: #edf0f6;
  --muted: #9aa3b5;

  /* ZX Spectrum bright palette, tuned for contrast on dark */
  --cyan: #38e1e1;
  --magenta: #f356d4;
  --yellow: #ffd23f;
  --green: #46e08a;
  --orange: #ff9d3b;
  --red: #ff4a3d;

  /* Sinclair rainbow stripe */
  --stripe: linear-gradient(
    90deg,
    var(--red) 0 25%,
    var(--yellow) 25% 50%,
    var(--green) 50% 75%,
    var(--cyan) 75% 100%
  );

  /* Type */
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", var(--font-body);
  --font-pixel: "Press Start 2P", "Courier New", monospace;

  /* Fluid type scale */
  --text-sm: 0.875rem;
  --text-base: clamp(1rem, 0.95rem + 0.2vw, 1.125rem);
  --text-lg: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  --text-xl: clamp(1.6rem, 1.3rem + 1.4vw, 2.6rem);
  --text-hero: clamp(2.4rem, 1.6rem + 4.5vw, 5.5rem);

  --radius: 12px;
  --container: 72rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  /* Faint dot grid, like a dimmed pixel raster */
  background-image: radial-gradient(rgba(154, 163, 181, 0.07) 1px, transparent 1px);
  background-size: 28px 28px;
}

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

a {
  color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
}

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

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* Accessible skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--yellow);
  color: #000;
  padding: 0.6rem 1rem;
  z-index: 100;
  font-weight: 600;
}

.skip-link:focus {
  left: 0;
}

/* --------------------------------------------------------------------------
   3. Signature elements
   -------------------------------------------------------------------------- */

/* Sinclair rainbow stripe — use as a thin decorative bar */
.stripe {
  display: block;
  height: 4px;
  background: var(--stripe);
  border: 0;
  margin: 0;
}

/* Skewed stripe chip, echoing the Spectrum case badge */
.stripe--badge {
  width: 3.5rem;
  height: 0.9rem;
  transform: skewX(-24deg);
  border-radius: 2px;
}

/* Pixel-font micro label above headings */
.eyebrow {
  font-family: var(--font-pixel);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 1rem;
}

.eyebrow--yellow { color: var(--yellow); }
.eyebrow--magenta { color: var(--magenta); }
.eyebrow--green { color: var(--green); }

/* Tape-loading bar: the animated cassette border of a loading Spectrum */
.tapeload {
  height: 8px;
  border-radius: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--cyan) 0 14px,
    #103b46 14px 28px
  );
  background-size: 56px 100%;
  animation: tapeload 1.1s linear infinite;
}

@keyframes tapeload {
  to { background-position: 56px 0; }
}

/* --------------------------------------------------------------------------
   4. Header & navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.logo .stripe--badge {
  width: 2.2rem;
  height: 0.7rem;
}

.logo em {
  font-style: normal;
  color: var(--cyan);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-image: var(--stripe) 1;
  border-bottom: 2px solid;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

@media (max-width: 44rem) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem var(--gutter) 1rem;
  }

  .site-nav a {
    display: block;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--line);
  }
}

/* --------------------------------------------------------------------------
   5. Hero
   -------------------------------------------------------------------------- */
.hero {
  padding-block: clamp(4rem, 12vh, 8rem) clamp(3rem, 8vh, 6rem);
  position: relative;
  overflow: hidden;
}

.hero h1 {
  font-size: var(--text-hero);
  max-width: 14ch;
  margin-bottom: 0.4em;
}

.hero h1 .accent {
  color: var(--cyan);
}

.hero__lead {
  font-size: var(--text-lg);
  color: var(--muted);
  max-width: 46ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.hero .tapeload {
  max-width: 18rem;
  margin-top: 3.5rem;
}

/* --------------------------------------------------------------------------
   6. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  border-color: var(--cyan);
  color: var(--ink);
  transform: translateY(-2px);
}

.btn--grey {
  background: #4a5060;
  border-color: #4a5060;
}

.btn--grey:hover {
  background: #5c6375;
}

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04252a;
}

.btn--primary:hover {
  background: var(--yellow);
  border-color: var(--yellow);
  color: #2b2200;
}

/* --------------------------------------------------------------------------
   7. Sections
   -------------------------------------------------------------------------- */
.section {
  padding-block: clamp(3rem, 9vh, 6.5rem);
  border-top: 1px solid var(--line);
}

.section__head {
  margin-bottom: clamp(2rem, 5vh, 3.5rem);
  max-width: 60ch;
}

.section__head h2 {
  font-size: var(--text-xl);
}

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

/* --------------------------------------------------------------------------
   8. Game cards
   -------------------------------------------------------------------------- */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(21rem, 100%), 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
}

.game-card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

/* Rainbow stripe slides in along the top edge on hover */
.game-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--stripe);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  z-index: 1;
}

.game-card:hover {
  transform: translateY(-4px);
  border-color: #34405a;
}

.game-card:hover::before {
  transform: scaleX(1);
}

.game-card__media {
  display: block;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line);
}

.game-card__media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  image-rendering: pixelated;
}

.game-card__body {
  padding: clamp(1.2rem, 3vw, 1.8rem);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  flex: 1;
}

.game-card__body .eyebrow {
  margin-bottom: 0;
}

/* Eyebrow colours cycle through six accents by card position */
.game-grid .game-card:nth-child(6n + 1) .eyebrow { color: var(--cyan); }
.game-grid .game-card:nth-child(6n + 2) .eyebrow { color: var(--yellow); }
.game-grid .game-card:nth-child(6n + 3) .eyebrow { color: var(--magenta); }
.game-grid .game-card:nth-child(6n + 4) .eyebrow { color: var(--green); }
.game-grid .game-card:nth-child(6n + 5) .eyebrow { color: var(--orange); }
.game-grid .game-card:nth-child(6n + 6) .eyebrow { color: var(--red); }

.game-card h3 {
  font-size: var(--text-lg);
  margin: 0;
}

.game-card h3 a {
  color: inherit;
  text-decoration: none;
}

.game-card h3 a:hover {
  color: var(--cyan);
}

.game-card__desc {
  color: var(--muted);
  margin: 0;
  flex: 1;
}

/* Spec sheet: dl rendered as a compact fact strip */
.specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.6rem;
  margin: 0;
  padding: 0.9rem 0;
  border-block: 1px dashed var(--line);
}

.specs div {
  display: flex;
  flex-direction: column;
}

.specs dt {
  font-family: var(--font-pixel);
  font-size: 0.5rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.specs dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
}

.game-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* --------------------------------------------------------------------------
   9. Timeline (About the ZX Spectrum)
   -------------------------------------------------------------------------- */
.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline li {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 1.8rem);
  position: relative;
}

.timeline h3 {
  font-size: var(--text-lg);
  margin: 0 0 0.4rem;
}

.timeline__era {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.35rem;
}

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

/* --------------------------------------------------------------------------
   10. Feedback form
   -------------------------------------------------------------------------- */
.feedback-form {
  max-width: 44rem;
  display: grid;
  gap: 1.2rem;
}

.feedback-form__row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
  gap: 1.2rem;
}

.feedback-form label {
  display: grid;
  gap: 0.45rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.feedback-form input,
.feedback-form textarea {
  font: inherit;
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: normal;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
  transition: border-color 0.15s ease;
}

.feedback-form input:focus,
.feedback-form textarea:focus {
  outline: none;
  border-color: var(--cyan);
}

.feedback-form textarea {
  resize: vertical;
  min-height: 8rem;
}

/* honeypot field: visually gone, still present for bots */
.feedback-form__hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.feedback-form__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.feedback-form__status {
  margin: 0;
  color: var(--green);
  font-size: var(--text-sm);
}

.feedback-form__status.is-error {
  color: var(--red);
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem;
  margin-top: clamp(2rem, 6vh, 4rem);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  color: var(--muted);
  font-size: var(--text-sm);
}

.site-footer p {
  margin: 0.2rem 0;
}

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

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

/* --------------------------------------------------------------------------
   12. Scroll reveal (progressive enhancement, JS adds .reveal)
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   13. Game detail pages
   -------------------------------------------------------------------------- */
.breadcrumbs {
  margin: 2.5rem 0 2rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.breadcrumbs span {
  margin-inline: 0.35em;
}

.game-detail__hero {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 3rem;
}

@media (min-width: 800px) {
  .game-detail__hero {
    grid-template-columns: 1fr 1fr;
  }
}

.game-detail__hero img {
  border: 1px solid var(--line);
  border-radius: 8px;
}

.game-detail__body {
  max-width: 65ch;
  margin-bottom: 3rem;
}

.game-detail__body p {
  margin-bottom: 1.4em;
}

.game-detail__footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--line);
}

/* --------------------------------------------------------------------------
   14. Motion preferences
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}