/* Chabi terminal base: shared by the landing page and the sign-in pages.
   Strictly two inks. Emphasis is inverse video, never a third colour. */

@font-face {
  font-family: "Martian Mono";
  font-style: normal;
  font-display: swap;
  font-weight: 100 800;
  font-stretch: 75% 112.5%;
  src: url(/static/fonts/martian-mono.woff2) format("woff2-variations");
}

:root {
  /* Light: printed manual on warm paper. */
  --paper: #f3f1ea;
  --ink: #0c0c0b;
  --scan: 3%;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    /* Dark: phosphor on glass. */
    --paper: #090909;
    --ink: #eeeee6;
    --scan: 4.5%;
    color-scheme: dark;
  }
}
:root {
  --dim: color-mix(in srgb, var(--ink) 58%, var(--paper));
  --faint: color-mix(in srgb, var(--ink) 16%, var(--paper));
  --font: "Martian Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  background-color: var(--paper);
  /* Scanlines, plus a soft vignette so the screen has depth. */
  background-image:
    repeating-linear-gradient(to bottom, color-mix(in srgb, var(--ink) var(--scan), transparent) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at 50% 35%, transparent 55%, color-mix(in srgb, var(--ink) 7%, transparent) 100%);
  background-attachment: fixed;
  color: var(--ink);
  font: 400 14px/1.7 var(--font);
  font-stretch: 87.5%;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%; /* stop iOS Safari enlarging text in landscape */
  text-size-adjust: 100%;
}
::selection { background: var(--ink); color: var(--paper); }

a { color: inherit; text-decoration: underline; text-decoration-style: dotted; text-underline-offset: 3px; }
a:hover { background: var(--ink); color: var(--paper); text-decoration: none; }
:focus-visible { outline: 1px dashed var(--ink); outline-offset: 3px; }

.dim { color: var(--dim); }
.b { font-weight: 700; }

/* Buttons read as [ label ]; the primary one is a solid inverse block. */
.btn {
  display: inline-flex; align-items: center; gap: 0.5ch;
  font: inherit; font-weight: 600; letter-spacing: 0.02em; text-decoration: none; cursor: pointer;
  color: var(--ink); background: transparent; border: 0; padding: 0.35em 0.2ch; border-radius: 0;
}
.btn::before { content: "["; }
.btn::after { content: "]"; }
.btn:hover, .btn:focus-visible { background: var(--ink); color: var(--paper); outline: none; }
.btn.solid { background: var(--ink); color: var(--paper); padding: 0.35em 1.4ch; }
.btn.solid::before, .btn.solid::after { content: none; }
.btn.solid:hover, .btn.solid:focus-visible {
  background: var(--paper); color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink);
}
.btn:disabled { opacity: 0.45; cursor: default; }
.btn:disabled:hover { background: transparent; color: var(--ink); }
.btn.solid:disabled:hover { background: var(--ink); color: var(--paper); box-shadow: none; }

/* Block cursor */
.cursor::after {
  content: ""; display: inline-block; width: 0.62em; height: 1.05em; margin-left: 0.15em;
  vertical-align: -0.17em; background: var(--ink); animation: blink 1.06s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Print-in: each .r* line is typed out left to right, one after another. */
@keyframes print {
  from { clip-path: inset(0 100% 0 0); }
  to { clip-path: inset(0 0 0 0); }
}
.r1, .r2, .r3, .r4, .r5, .r6, .r7, .r8, .r9, .r10, .r11, .r12 {
  animation: print 0.55s steps(22, end) both;
}
.r1 { animation-delay: 0.05s; } .r2 { animation-delay: 0.16s; } .r3 { animation-delay: 0.27s; }
.r4 { animation-delay: 0.38s; } .r5 { animation-delay: 0.49s; } .r6 { animation-delay: 0.6s; }
.r7 { animation-delay: 0.71s; } .r8 { animation-delay: 0.82s; } .r9 { animation-delay: 0.93s; }
.r10 { animation-delay: 1.04s; } .r11 { animation-delay: 1.15s; } .r12 { animation-delay: 1.26s; }

@media (prefers-reduced-motion: reduce) {
  .r1, .r2, .r3, .r4, .r5, .r6, .r7, .r8, .r9, .r10, .r11, .r12 { animation: none; }
  .cursor::after { animation: none; }
}

/* Pixel key (inline SVG, currentColor) in menu bars */
.key-icon { display: inline-block; width: 32px; height: 12px; vertical-align: middle; margin: -2px 0.9ch 0 0; } /* exactly 4px per key pixel; the shaft is the middle row, so this centres it */

/* Signed-in / signed-out variants, toggled by landing.js before first paint */
html:not(.signed-in) .when-in, html.signed-in .when-out { display: none; }