@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  color-scheme: dark;
  --bg: #090c12;
  --panel: #0e131c;
  --panel-raised: #141b27;
  --line: #273142;
  --line-bright: #3b4960;
  --text: #f2f5f8;
  --muted: #8e9aad;
  --accent: #74e1c1;
  --accent-strong: #9ff3db;
  --accent-dark: #092d29;
  --header-height: 6.25rem;
  font-family: "DM Sans", system-ui, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  background: radial-gradient(circle at 75% -20%, rgba(53, 124, 110, 0.18), transparent 38rem), var(--bg);
}

button, a { font: inherit; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
h1, h2, p { margin: 0; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.25rem, 4vw, 4.5rem);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 12, 18, 0.88);
  backdrop-filter: blur(18px);
}

.site-header::after {
  content: "";
  position: absolute;
  left: clamp(1.25rem, 4vw, 4.5rem);
  bottom: -1px;
  width: clamp(4.5rem, 10vw, 8.5rem);
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 22px rgba(116, 225, 193, 0.6);
}

.site-header h1 { font: 600 clamp(2rem, 3.5vw, 3.5rem)/1 "Space Grotesk", sans-serif; letter-spacing: -0.06em; }
.site-header h1 a { color: var(--accent); text-decoration: none; }
.site-header h1 span { color: var(--text); }

.about-link {
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.6rem 0;
  border: 0;
  border-bottom: 1px solid var(--line-bright);
  background: transparent;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease;
}
.about-link:hover { color: var(--accent); border-color: var(--accent); }

.about-dialog {
  width: min(34rem, calc(100vw - 2rem));
  margin: auto;
  padding: clamp(2rem, 5vw, 3.25rem);
  color: var(--text);
  border: 1px solid rgba(116, 225, 193, 0.3);
  border-radius: 1.25rem;
  background:
    radial-gradient(circle at 100% 0, rgba(116, 225, 193, 0.14), transparent 18rem),
    #111722;
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, 0.62), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: visible;
}

.about-dialog[open] { animation: dialog-enter 300ms cubic-bezier(0.16, 1, 0.3, 1) both; }
.about-dialog[open]::backdrop { background: rgba(3, 6, 10, 0.72); backdrop-filter: blur(8px); animation: backdrop-enter 240ms ease-out both; }
.about-dialog.is-closing { animation: dialog-exit 180ms ease-in both; }
.about-dialog.is-closing::backdrop { animation: backdrop-exit 180ms ease-in both; }

@keyframes dialog-enter {
  from { opacity: 0; transform: translateY(1.5rem) scale(0.94); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes dialog-exit {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(0.75rem) scale(0.97); }
}
@keyframes backdrop-enter { from { opacity: 0; } to { opacity: 1; } }
@keyframes backdrop-exit { from { opacity: 1; } to { opacity: 0; } }

.dialog-close {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  padding: 0 0 0.1rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(9, 12, 18, 0.52);
  font-size: 1.55rem;
  line-height: 1;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, transform 160ms ease;
}
.dialog-close:hover { color: var(--accent); border-color: rgba(116, 225, 193, 0.45); transform: rotate(6deg); }
.about-content h2 { margin: 0 3rem 1rem 0; font: 600 clamp(1.25rem, 3.6vw, 2rem)/1.05 "Space Grotesk", sans-serif; letter-spacing: -0.045em; }
.about-content p { color: #b2bdcc; font-size: 1rem; line-height: 1.7; }

.app-shell {
  height: 100dvh;
  padding-top: var(--header-height);
  display: grid;
  grid-template-columns: minmax(15rem, 21vw) 1fr;
}

.category-nav {
  min-width: 0;
  padding: clamp(2rem, 4vw, 4rem) clamp(1.25rem, 2.5vw, 2.5rem);
  border-right: 1px solid var(--line);
  background: rgba(10, 14, 21, 0.62);
}

.nav-label, .eyebrow { color: var(--muted); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; }
.nav-label { margin: 0 0 1.25rem 0.25rem; }

.category-button {
  width: 100%;
  min-height: 4.75rem;
  display: grid;
  grid-template-columns: 2rem 1fr auto;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.75rem;
  padding: 0.8rem 1rem;
  color: var(--muted);
  text-align: left;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: 0.8rem;
  background: transparent;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}
.category-button:hover { color: var(--text); background: var(--panel); }
.category-button:active { transform: scale(0.99); }
.category-button.is-active { color: var(--text); border-color: rgba(116, 225, 193, 0.28); background: linear-gradient(100deg, rgba(116, 225, 193, 0.14), rgba(116, 225, 193, 0.04)); box-shadow: inset 3px 0 0 var(--accent); }
.category-icon { color: var(--accent); font-size: 1.25rem; text-align: center; }
.category-count { color: var(--muted); font: 500 0.72rem "Space Grotesk", sans-serif; }
.nav-note { max-width: 15rem; margin: clamp(2rem, 8vh, 5rem) 0.25rem 0; color: #687487; font-size: 0.85rem; line-height: 1.6; }

.content-pane {
  min-width: 0;
  overflow-y: auto;
  padding: clamp(2rem, 5vw, 5.25rem) clamp(1.25rem, 5vw, 6rem) 5rem;
  scrollbar-color: var(--line-bright) transparent;
}

.content-header { display: grid; grid-template-columns: minmax(0, 1fr); row-gap: clamp(10px, 1.2vw, 18px); max-width: 88rem; margin-bottom: clamp(2rem, 5vw, 4.25rem); }
.eyebrow { margin-bottom: 0.7rem; color: var(--accent); }
.content-header h2 { font: 550 clamp(26px, 2.2vw, 40px)/1.05 "Space Grotesk", sans-serif; letter-spacing: -0.055em; white-space: nowrap; }
.category-description { justify-self: end; color: var(--muted); font-size: clamp(14px, 1.05vw, 18px); line-height: 1.55; text-align: right; white-space: nowrap; }

.app-list { max-width: 88rem; border-top: 1px solid var(--line); }
.app-list[hidden], .app-info[hidden] { display: none; }
.app-card { border-bottom: 1px solid var(--line); }
.app-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.75rem; align-items: center; padding: 0.9rem 0; }
.app-card.is-expanded .app-row { grid-template-columns: 1fr; }
.app-toggle, .play-button { border: 0; border-radius: 0.75rem; }

.app-toggle {
  min-width: 0;
  display: grid;
  min-height: 5rem;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  align-items: center;
  padding: 0 1.25rem;
  color: var(--text);
  background: transparent;
  text-align: left;
  font: 600 clamp(1.05rem, 1.7vw, 1.35rem) "Space Grotesk", sans-serif;
  cursor: pointer;
  transition: background 160ms ease;
}
.app-toggle:hover, .app-toggle[aria-expanded="true"] { background: var(--panel-raised); }
.app-toggle[aria-expanded="true"] { border-radius: 0.75rem 0.75rem 0 0; }
.app-number { color: #5e6b7d; font-size: 0.72rem; letter-spacing: 0.08em; }
.play-button {
  width: 3rem;
  min-width: 3rem;
  min-height: 3rem;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  color: var(--accent-dark);
  background: var(--accent);
  text-decoration: none;
  font-weight: 700;
  transition: background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}
.play-button[hidden] { display: none; }
.play-button:hover { background: var(--accent-strong); transform: translateY(-2px); box-shadow: 0 8px 26px rgba(116, 225, 193, 0.18); }

.app-info {
  margin: -0.9rem 0 0.9rem;
  padding: 1.4rem 1.25rem 1.25rem 4rem;
  border-radius: 0 0 0.75rem 0.75rem;
  background: var(--panel-raised);
  animation: reveal 180ms ease-out;
}
@keyframes reveal { from { opacity: 0; transform: translateY(-0.4rem); } to { opacity: 1; transform: translateY(0); } }
.rst-content { max-width: 48rem; color: #b2bdcc; line-height: 1.7; }
.rst-content h2, .rst-content h3 { color: var(--text); font: 600 1.05rem "Space Grotesk", sans-serif; }
.rst-content p + p, .rst-content ul { margin-top: 0.7rem; }
.rst-content ul { padding-left: 1.2rem; }
.rst-content li::marker { color: var(--accent); }

.launch-button {
  width: fit-content;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1.4rem 0 0 auto;
  padding: 0.7rem 1rem;
  color: var(--accent);
  border: 1px solid rgba(116, 225, 193, 0.35);
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 700;
}
.launch-button:hover { color: var(--accent-strong); border-color: var(--accent); background: rgba(116, 225, 193, 0.06); }

@media (max-width: 760px) {
  :root { --header-height: 4.75rem; }
  body { overflow: auto; }
  .site-header { padding: 0 1.15rem; }
  .site-header h1 { font-size: 2rem; }
  .about-link { font-size: 0.9rem; }
  .app-shell { min-height: 100dvh; height: auto; display: block; }
  .category-nav { position: sticky; top: var(--header-height); z-index: 5; display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; padding: 0.75rem 1rem; border-right: 0; border-bottom: 1px solid var(--line); background: rgba(9, 12, 18, 0.94); backdrop-filter: blur(16px); }
  .nav-label, .nav-note, .category-icon, .category-count { display: none; }
  .category-button { min-height: 3rem; display: block; margin: 0; padding: 0.7rem 0.5rem; text-align: center; font-size: 0.86rem; }
  .category-button.is-active { box-shadow: inset 0 -2px 0 var(--accent); }
  .content-pane { overflow: visible; padding: 2.25rem 1rem 3rem; }
  .content-header { row-gap: clamp(8px, 2vw, 14px); margin-bottom: 2rem; }
  .content-header h2 { font-size: clamp(19px, 3.6vw, 26px); }
  .category-description { font-size: clamp(10px, 2.8vw, 14px); }
  .app-row { gap: 0.5rem; padding: 0.65rem 0; }
  .app-toggle { min-height: 4.25rem; grid-template-columns: 2.1rem minmax(0, 1fr); padding: 0 0.85rem; font-size: 1rem; }
  .play-button { width: 2.75rem; min-width: 2.75rem; min-height: 2.75rem; }
  .app-info { margin: -0.65rem 0 0.65rem; padding: 1.15rem 1rem; font-size: 0.95rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}