/* Claude Sync — shared foundation for the product site and the documentation.
   Concept: carbonless triplicate forms. One original (white), two copies
   (canary, pink), all in carbon-blue ink: one sheet per PC.
   Layout: left-aligned, a single reading column, generous margins. */

:root {
  --desk: #E8EBF2;          /* the surface the sheets lie on */
  --sheet: #FFFFFF;         /* original */
  --canary: #FFF3B0;        /* copy 2 */
  --pink: #FFD9E2;          /* copy 3 */
  --ink: #1B2153;           /* carbon-blue text */
  --ink-soft: #4A5180;      /* secondary text */
  --ink-faint: #8A90B4;     /* rules, captions */
  --carbon: #2C3DB5;        /* links, primary action */
  --carbon-ink: #FFFFFF;    /* text on --carbon */
  --rule: #CDD2E3;
  --code-bg: #171C45;
  --code-fg: #E3E6FF;
  --code-dim: #8E95C9;
  --ok: #1E7A4E;
  --warn: #8A5300;
  --warn-bg: #FFF3B0;

  --display: "Archivo", "Arial Narrow", "Segoe UI", sans-serif;
  --text: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: "Fragment Mono", Consolas, "Courier New", monospace;

  /* Modular scale, ratio 1.25 from a 17px base. */
  --s-1: 0.85rem;
  --s0: 1.0625rem;
  --s1: 1.33rem;
  --s2: 1.66rem;
  --s3: 2.08rem;
  --s4: 2.6rem;
  --s5: clamp(2.6rem, 1.6rem + 4.2vw, 4.4rem);

  --gutter: clamp(16px, 4vw, 40px);
  --measure: 66ch;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --desk: #0F1330; --sheet: #191E45; --canary: #3B3517; --pink: #3F2131;
    --ink: #E1E4FF; --ink-soft: #AEB3DA; --ink-faint: #6E74A3;
    --carbon: #9AA6FF; --carbon-ink: #0F1330; --rule: #2C3263;
    --code-bg: #0A0D24; --code-fg: #E3E6FF; --code-dim: #7C83BC;
    --ok: #62D29B; --warn: #F2C14E; --warn-bg: #2E2B1E;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --desk: #0F1330; --sheet: #191E45; --canary: #3B3517; --pink: #3F2131;
  --ink: #E1E4FF; --ink-soft: #AEB3DA; --ink-faint: #6E74A3;
  --carbon: #9AA6FF; --carbon-ink: #0F1330; --rule: #2C3263;
  --code-bg: #0A0D24; --code-fg: #E3E6FF; --code-dim: #7C83BC;
  --ok: #62D29B; --warn: #F2C14E; --warn-bg: #2E2B1E;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font: 400 var(--s0)/1.65 var(--text);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--carbon); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--carbon); outline-offset: 3px; border-radius: 3px; }
h1, h2, h3, h4 {
  font-family: var(--display);
  font-stretch: 80%;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
  margin: 0;
}
p { margin: 0; }
code, kbd, pre { font-family: var(--mono); font-size: 0.86em; }
:not(pre) > code {
  background: color-mix(in srgb, var(--carbon) 10%, transparent);
  padding: 0.05em 0.35em;
  border-radius: 4px;
  overflow-wrap: anywhere;
}
::selection { background: var(--canary); color: var(--ink); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

.wrap { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -999px; top: 0; background: var(--sheet); padding: 8px 12px; z-index: 50; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip:focus { left: 12px; top: 12px; }

/* Top bar */
.bar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--desk) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}
.bar .wrap { display: flex; align-items: center; gap: 24px; min-height: 64px; flex-wrap: wrap; padding-block: 8px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 700 1.15rem/1 var(--display); font-stretch: 85%; }
.brand svg { width: 30px; height: 30px; flex: none; }
.bar nav { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.bar nav a {
  font: 500 0.95rem/1 var(--display); color: var(--ink-soft); text-decoration: none;
  padding: 11px 12px; border-radius: 6px; min-height: 44px; display: inline-flex; align-items: center;
}
.bar nav a:hover { color: var(--ink); background: color-mix(in srgb, var(--sheet) 70%, transparent); }
.bar nav a[aria-current="page"] { color: var(--ink); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 12px; min-height: 48px;
  font: 600 1rem/1.2 var(--display); text-decoration: none; cursor: pointer;
  padding: 13px 20px; border-radius: 8px; border: 1.5px solid transparent;
  transition: transform 150ms ease, background-color 150ms ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--carbon); color: var(--carbon-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--carbon) 88%, var(--ink)); }
.btn-quiet { color: var(--ink); border-color: var(--rule); background: var(--sheet); }
.btn-quiet:hover { border-color: var(--ink-faint); }
.btn svg { width: 20px; height: 20px; flex: none; }

/* Commands with a copy button */
.cmd { display: flex; align-items: stretch; background: var(--code-bg); color: var(--code-fg); border-radius: 8px; min-width: 0; }
.cmd pre { margin: 0; padding: 12px 16px; overflow-x: auto; flex: 1; min-width: 0; font-size: 0.86rem; line-height: 1.55; }
.cmd button {
  flex: none; border: 0; border-left: 1px solid color-mix(in srgb, var(--code-fg) 12%, transparent);
  background: transparent; color: var(--code-dim); cursor: pointer;
  font: 500 0.8rem/1 var(--display); padding: 0 16px; min-width: 76px; border-radius: 0 8px 8px 0;
}
.cmd button:hover { color: var(--code-fg); }
.cmd button[data-done] { color: #7BE0AB; }

/* Notes */
.note { border-left: 3px solid var(--carbon); background: var(--sheet); padding: 14px 18px; border-radius: 0 8px 8px 0; display: grid; gap: 4px; }
.note strong { font: 700 0.95rem/1.3 var(--display); }
.note.warn { border-left-color: var(--warn); background: var(--warn-bg); }

/* Footer */
.foot { border-top: 1px solid var(--rule); color: var(--ink-soft); font: 400 0.92rem/1.5 var(--display); }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; padding-block: 28px; }
.foot nav { display: flex; gap: 20px; flex-wrap: wrap; }
.foot a { color: var(--ink-soft); }