/* ==========================================================================
   Playground page
   Tokens/nav copied verbatim from kashoofiles/styles.css for exact visual
   parity with the rest of the site (same logo + nav pill, same type scale).
   ========================================================================== */

/* Native cross-document view transition: Chrome/Edge 126+ cross-fade
   between same-origin pages instead of a hard cut. No-op elsewhere. */
@view-transition {
  navigation: auto;
}

:root {
  color-scheme: light;

  --bg: #ffffff;
  --surface: #ffffff;
  --ink: #030712;
  --ink-2: #1f2937;
  --muted: #4b5563;
  --line: rgba(3, 7, 18, 0.1);
  --shadow-card: 0 1px 2px rgba(3, 7, 18, 0.06), 0 10px 28px -10px rgba(3, 7, 18, 0.2);
  --nav-ink: #292a2c;
  --nav-bg: #ffffff;
  --shadow-nav: 0 4px 8px rgba(73, 73, 73, 0.16);
  --header-scrolled-bg: rgba(255, 255, 255, 0.72);
  --accent: #5f5bf0;
  --link-accent: #5f72ed;
  --brand-ink: #1f2937;
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, sans-serif;

  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-ui: "SF Pro Text", "SF Pro", -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;

  --fs-display: clamp(3rem, 8vw, 7.5rem);
  --fs-h2: clamp(1.75rem, 2.65vw, 2.5rem);
  --fs-lead: clamp(1.25rem, 2.1vw, 2rem);
  --track-lead: -0.035em;

  --gutter: clamp(20px, 5.55vw, 84px);
  --max: 1512px;
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0a0c12;
  --surface: #151925;
  --ink: #f3f4f6;
  --ink-2: #d1d5db;
  --muted: #9ca3af;
  --line: rgba(255, 255, 255, 0.14);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.5), 0 10px 28px -10px rgba(0, 0, 0, 0.7);
  --nav-ink: #e5e7eb;
  --nav-bg: #1c2431;
  --shadow-nav: 0 4px 12px rgba(0, 0, 0, 0.5);
  --header-scrolled-bg: rgba(10, 12, 18, 0.72);
  --brand-ink: #e5e7eb;
  --accent: #9b8cff;
  --link-accent: color-mix(in srgb, #5f72ed 70%, white);
}

/* ---------- base ---------- */

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

img, video { display: block; max-width: 100%; height: auto; }
h1, h2, p, dl, dd, figure { margin: 0; padding: 0; }
a { color: inherit; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: 2rem;
}

.skip-link {
  position: fixed; top: 8px; left: 8px; z-index: 100;
  padding: 10px 14px; background: var(--ink); color: var(--bg);
  border-radius: 8px; font: 500 14px var(--font-ui);
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

/* ---------- nav (copied from kashoofiles/styles.css — keep in sync) ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  padding-top: 24px;
  pointer-events: none;
  transition: background-color .3s ease, padding .3s ease;
}
.site-header.is-scrolled {
  background: var(--header-scrolled-bg);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding-top: 20px;
  padding-bottom: 4px;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 0; /* .wrap's own padding-bottom isn't meant for the nav bar */
}

.brand {
  pointer-events: auto;
  flex: none;
  white-space: nowrap;
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--brand-ink);
  text-decoration: none;
}

.nav-pill {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 16px 32px;
  background: var(--nav-bg);
  border-radius: 12px;
  box-shadow: var(--shadow-nav);
  transition: background-color .3s ease, box-shadow .3s ease;
  /* Explicit font + line-height so the pill's size never depends on
     whatever font/line-height a given page sets on <body> — kept in
     sync with the .nav used on the homepage. */
  font-family: "SF Pro Text", "SF Pro", -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--nav-ink);
}

.nav-pill a { transition: color .2s ease; text-decoration: none; }
.nav-pill a:hover, .nav-pill a[aria-current="page"] { color: var(--link-accent); }

.material-symbols-outlined {
  font-variation-settings:
  'FILL' 0,
  'wght' 400,
  'GRAD' 0,
  'opsz' 24
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 24px; height: 24px;
  padding: 0; border: 0; background: none; cursor: pointer;
  color: var(--nav-ink);
  overflow: hidden;
  transition: opacity .2s ease, transform .3s ease;
}
.theme-toggle:hover { opacity: .65; }
.theme-toggle:active { transform: rotate(25deg) scale(.92); }
.theme-toggle:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; border-radius: 6px; }
.theme-toggle .material-symbols-outlined { font-size: 24px; line-height: 1; }
/* Light mode → sun, dark mode → moon (pure CSS, so there is no flash on load) */
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: inline; }

/* ---------- intro ---------- */

.intro { padding-top: clamp(112px, 9.5vw, 144px); }

.display {
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.012em;
}

.lead {
  font-size: var(--fs-lead);
  line-height: 1.34;
  letter-spacing: var(--track-lead);
  max-width: 1043px;
}
.lead a {
  text-underline-offset: 3px;
  text-decoration:none;
  font-weight: 500;
  transition: color .2s ease;
  color: var(--link-accent);
}
.lead a:hover { color: var(--accent); }

.play-subtitle {
  margin-top: clamp(20px, 2.6vw, 32px);
  color: var(--ink-2);
}

/* ---------- project grid ---------- */

.play-grid {
  padding-block: clamp(56px, 7vw, 96px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3vw, 40px);
}

.play-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
@media (hover: hover) {
  .play-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: color-mix(in srgb, var(--ink) 20%, transparent);
  }
}

.play-card__media {
  aspect-ratio: 16 / 10;
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface);
}
.play-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s cubic-bezier(0.25, 1, 0.5, 1);
}
.play-card:hover .play-card__media img { transform: scale(1.08); }

.play-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
}

.play-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font: 500 0.8125rem var(--font-ui);
  padding: 5px 14px;
  border-radius: 20px;
  white-space: nowrap;
  color: var(--tag);
  background: color-mix(in srgb, var(--tag) 16%, var(--surface));
}

/* ---------- section divider (copied from kashoofiles/styles.css) ---------- */

.section-divider {
  border: none;
  border-top: 1px solid var(--line);
  margin-block: 0;
}

/* ---------- project detail pages ---------- */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: clamp(24px, 3vw, 40px);
  color: var(--muted);
  font: 500 0.9375rem var(--font-ui);
  text-decoration: none;
  transition: color .2s ease;
}
.back-link:hover { color: var(--link-accent); }

.project-header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: clamp(32px, 4vw, 48px);
}
.project-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink);
}

.project-hero {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  margin: 0 0 clamp(32px, 4vw, 48px);
  background: var(--surface);
}
.project-hero img { width: 100%; height: auto; display: block; }
.project-hero--embed { aspect-ratio: 16 / 9; }
.project-hero--embed iframe { width: 100%; height: 100%; border: none; display: block; }

.project-body {
  display: grid;
  gap: clamp(28px, 3.5vw, 40px);
  padding-bottom: clamp(8px, 1vw, 16px);
}
.project-section h2 {
  font: 700 1rem var(--font-ui);
  color: var(--ink);
  margin-bottom: 12px;
}
.project-section ul {
  list-style: disc;
  padding-left: 1.25em;
  display: grid;
  gap: 10px;
}
.project-section p,
.project-section li {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink-2);
}
.project-section li::marker { color: var(--muted); }

.prototype-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: clamp(32px, 4vw, 48px) 0 0;
  color: var(--link-accent);
  font: 600 0.9375rem var(--font-ui);
  text-decoration: none;
}
.prototype-link:hover { text-decoration: underline; text-underline-offset: 3px; }

.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(32px, 4vw, 48px) 0 0;
}
.download-links .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg);
  font: 600 0.9375rem var(--font-ui);
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease;
}
@media (hover: hover) {
  .download-links .btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-card); }
}

/* ---------- closing CTA (shared across all pages — keep in sync) ---------- */

.cta-divider {
  width: 454px;
  max-width: calc(100% - 2 * var(--gutter));
  margin: 0 auto;
  border: none;
  border-top: 1px solid var(--line);
}

.cta-section {
  padding-block: clamp(40px, 6vw, 80px) clamp(64px, 9vw, 120px);
  display: grid;
  gap: 16px;
}
.cta-section h2 {
  max-width: 1187px;
  margin: 0;
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--fs-lead);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}
.cta-section .lead {
  max-width: 1187px;
  margin: 0;
  width: auto;
  text-align: left;
}
.cta-section a {
  text-underline-offset: 3px;
  text-decoration: none;
  font-weight: 500;
  transition: color .2s ease;
  color: var(--link-accent);
}
.cta-section a:hover { color: var(--accent); }

/* ---------- page-load reveal (copied from kashoofiles/styles.css) ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.8s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--i, 0) * 110ms);
}
.js.is-ready .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  body { transition: none; }
}

/* ---------- responsive ---------- */

@media (pointer: coarse) {
  .nav-pill a { padding-block: 8px; }
  .theme-toggle { width: 32px; height: 32px; }
}

@media (max-width: 900px) {
  .brand { font-size: 32px; }
  .nav-pill { gap: 28px; padding: 14px 24px; font-size: 16px; }
  .play-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .site-header__inner { justify-content: center; }
  .brand { display: none; }
  .nav-pill { gap: 18px; padding: 12px 16px; font-size: 15px; }
  .play-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .site-header { padding-top: 12px; }
  .site-header__inner { gap: 8px; }
}

@media (max-width: 400px) {
  .nav-pill { gap: 12px; padding: 10px 12px; font-size: 14px; }
}