/* DYNAMO/OS — teletext-era design system */
:root {
  --crt: #0d0b1e;
  --crt-raise: #16132e;
  --phosphor: #eae6ff;
  --dim: #8f88b8;
  --cyan: #4de3ff;
  --magenta: #ff4da6;
  --lime: #b8ff4d;
  --amber: #ffc94d;
  --rule: #2b2650;
}

* { box-sizing: border-box; }

html { background: var(--crt); }

body {
  margin: 0;
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 3px),
    var(--crt);
  color: var(--phosphor);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 16px;
  line-height: 1.7;
}

.frame {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: var(--phosphor); background: var(--magenta); text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

::selection { background: var(--magenta); color: var(--crt); }

/* ---- header ---- */
header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 2px solid var(--rule);
}

.logo {
  font-family: "Silkscreen", monospace;
  font-size: 18px;
  color: var(--amber);
  text-decoration: none;
  letter-spacing: 1px;
}
.logo:hover { background: none; color: var(--lime); }

nav a {
  margin-left: 22px;
  font-size: 14px;
  color: var(--dim);
  text-decoration: none;
}
nav a:hover { color: var(--crt); }

/* ---- boot hero ---- */
.boot {
  padding: 64px 0 48px;
  min-height: 300px;
}

.boot-line { margin: 0; white-space: pre-wrap; }
.boot-line .ok { color: var(--lime); }
.boot-line .sys { color: var(--dim); }

.boot h1 {
  font-family: "Silkscreen", monospace;
  font-size: clamp(32px, 7vw, 58px);
  line-height: 1.15;
  margin: 28px 0 10px;
  color: var(--phosphor);
  text-shadow: 3px 3px 0 var(--magenta);
  letter-spacing: 1px;
}

.tagline {
  font-size: 18px;
  color: var(--cyan);
  margin: 0;
  max-width: 54ch;
}

.cursor {
  display: inline-block;
  width: 0.6em;
  height: 1.1em;
  background: var(--lime);
  vertical-align: text-bottom;
  animation: blink 1.06s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
  .boot-line { opacity: 1 !important; }
}

/* ---- sections ---- */
section { padding: 44px 0; border-top: 2px solid var(--rule); }

h2 {
  font-family: "Silkscreen", monospace;
  font-size: 20px;
  color: var(--amber);
  margin: 0 0 24px;
}
h2::before { content: "> "; color: var(--lime); }

.about p { max-width: 62ch; margin: 0 0 18px; }
.about .hot { color: var(--magenta); }

/* ---- cartridges ---- */
.shelf {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.cart {
  background: var(--crt-raise);
  border: 2px solid var(--rule);
  border-top: 14px solid var(--cart-color, var(--cyan));
  padding: 22px 20px 20px;
  position: relative;
}
.cart::after {            /* cartridge grip notches */
  content: "";
  position: absolute;
  top: -14px; right: 14px;
  width: 44px; height: 14px;
  background: repeating-linear-gradient(90deg, var(--crt) 0 4px, transparent 4px 10px);
}

.cart h3 {
  font-family: "Silkscreen", monospace;
  font-size: 16px;
  margin: 0 0 10px;
  color: var(--phosphor);
}

.cart p { font-size: 14px; color: var(--dim); margin: 0 0 14px; }

.cart .status {
  font-size: 12px;
  color: var(--crt);
  background: var(--cart-color, var(--cyan));
  padding: 2px 8px;
}

.cart.charades { --cart-color: var(--magenta); }
.cart.slot { --cart-color: var(--rule); border-style: dashed; }
.cart.slot h3 { color: var(--dim); }

/* ---- footer ---- */
footer {
  border-top: 2px solid var(--rule);
  padding: 36px 0 48px;
  font-size: 13px;
  color: var(--dim);
}
footer p { margin: 0 0 6px; }
footer a { color: var(--dim); }

/* ---- legal manual pages ---- */
.manual { padding: 48px 0; }
.manual h1 {
  font-family: "Silkscreen", monospace;
  font-size: clamp(24px, 5vw, 36px);
  color: var(--amber);
  margin: 0 0 8px;
}
.manual .updated { color: var(--dim); font-size: 14px; margin: 0 0 32px; }
.manual h2 { margin-top: 36px; font-size: 16px; }
.manual p, .manual li { max-width: 68ch; color: var(--phosphor); }
.manual address { font-style: normal; color: var(--cyan); }

@media (max-width: 560px) {
  nav a { margin-left: 14px; }
  .boot { padding: 44px 0 32px; }
}