/* tools — shared shell
   Tokens and chrome are lifted from marpheus.dev so the two read as one site.
   Everything here is layout and type; the tools bring their own controls. */

:root {
  color-scheme: dark;
  --bg:        #0a0a0a;
  --ink:       #f0efed;
  --ink-dim:   #8a8a88;
  --ink-faint: #6b6b68;
  --line:      #1f1f1e;
  --logo-flip: 0;   /* the mark ships white; light mode inverts it */

  /* the only colour that ever appears: pass / fail. everything else is grey. */
  --ok:  #7fb08a;
  --err: #d9776c;
  /* panels sit a hair off the background rather than on a border alone */
  --sunk:  rgba(255, 255, 255, 0.022);
  --raise: rgba(255, 255, 255, 0.05);

  --font: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono",
          "Cascadia Mono", Menlo, Consolas, monospace;

  --pad: clamp(1.5rem, 6vw, 5rem);
  --measure: 46rem;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* light mode: the paper the logo art was drawn on. declared twice on purpose —
   once for "system says light, user hasn't chosen", once for an explicit choice. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg:        #f7f6f2;
    --ink:       #14140f;
    --ink-dim:   #6a6a64;
    --ink-faint: #82817a;
    --line:      #dedcd3;
    --logo-flip: 1;
    --ok:  #3f7a4f;
    --err: #b3402f;
    --sunk:  rgba(0, 0, 0, 0.025);
    --raise: rgba(0, 0, 0, 0.05);
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg:        #f7f6f2;
  --ink:       #14140f;
  --ink-dim:   #6a6a64;
  --ink-faint: #82817a;
  --line:      #dedcd3;
  --logo-flip: 1;
  --ok:  #3f7a4f;
  --err: #b3402f;
  --sunk:  rgba(0, 0, 0, 0.025);
  --raise: rgba(0, 0, 0, 0.05);
}

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

/* the attribute has to beat every `display` a class might set, or a hidden
   .field / .opt / .msg would keep showing up */
[hidden] { display: none !important; }

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

body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: clamp(0.9rem, 0.55rem + 1vw, 1rem);
  line-height: 1.65;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  /* the theme change eases rather than snaps */
  transition: background-color 0.6s ease, color 0.6s ease;
}

::selection { background: var(--ink); color: var(--bg); }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

/* skip past the chrome; only shows itself once tabbed to */
.skip {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 40;
  padding: 0.4rem 0.7rem;
  background: var(--bg);
  border: 1px solid var(--line);
  font-size: 0.75rem;
  transform: translateY(-160%);
  transition: transform 0.25s var(--ease);
}
.skip:focus-visible { transform: none; }

/* ─── layout ─────────────────────────────────────────────────────── */

.wrap {
  max-width: var(--measure);
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vh, 4rem) var(--pad) clamp(1.75rem, 4vh, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 4.5vh, 3rem);
}
/* the homepage centres its one calm group; tool pages start at the top */
.wrap.centred { justify-content: center; }

.foot { margin-top: clamp(0.5rem, 2vh, 1.5rem); }

/* ─── the mark ───────────────────────────────────────────────────── */

.logo {
  display: block;
  width: clamp(3.25rem, 11vw, 4.25rem);
  height: auto;
  margin: 0 0 1.2rem -0.2rem;
  opacity: 0.95;
  filter: invert(var(--logo-flip));
  transition: filter 0.6s ease;
}

/* ─── theme toggle ───────────────────────────────────────────────── */

.theme {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink-faint);
  cursor: pointer;
  transition: color 0.35s ease;
  -webkit-tap-highlight-color: transparent;
}
.theme:hover, .theme:focus-visible { color: var(--ink); }

/* the homepage has no bar to hold it, so it floats */
.theme.floating {
  position: fixed;
  top: clamp(1rem, 2.5vw, 1.75rem);
  right: clamp(1rem, 2.5vw, 1.75rem);
  z-index: 2;
}

/* half-filled dial: it turns over when the theme does */
.dial {
  width: 0.95rem;
  height: 0.95rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: linear-gradient(to right, currentColor 50%, transparent 50%);
  transform: rotate(calc(var(--logo-flip) * 180deg));
  transition: transform 0.9s var(--ease), border-color 0.35s ease;
}

/* ─── headings ───────────────────────────────────────────────────── */

.name {
  margin: 0 0 0.6rem;
  font-size: clamp(1.6rem, 1rem + 4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.tagline {
  margin: 0;
  max-width: 40ch;
  color: var(--ink-dim);
  text-wrap: pretty;
}
.dim { color: var(--ink-faint); }

/* The groups live inside one wrapper, so they miss out on the gap the page
   gives its other children. Without this a heading sits right under the last
   card's hairline and reads as part of the list above it. */
.group + .group { margin-top: clamp(2.5rem, 5.5vh, 3.5rem); }

.section-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.4rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-dim);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.rule { flex: 1; height: 1px; background: var(--line); }
.count { color: var(--ink-faint); font-variant-numeric: tabular-nums; }

/* ─── tool cards ─────────────────────────────────────────────────── */

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  counter-reset: card;
}

.card {
  position: relative;
  counter-increment: card;
  border-bottom: 1px solid var(--line);
}

/* the hairline under the hovered row draws itself left to right */
.card::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--ink), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.7s var(--ease);
}

.card a {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.15rem 1rem;
  padding: 1.05rem 0.25rem;
  transition: padding-left 0.5s var(--ease);
}

/* row number, slides in from the gutter */
.card a::before {
  content: counter(card, decimal-leading-zero);
  position: absolute;
  top: 1.05rem;
  left: 0;
  font-size: 0.7rem;
  color: var(--ink-faint);
  opacity: 0;
  transform: translateX(-0.6rem);
  transition: opacity 0.5s ease, transform 0.5s var(--ease);
}

.card-title { color: var(--ink); transition: color 0.4s ease; }
.card-note {
  grid-column: 1;
  color: var(--ink-faint);
  font-size: 0.85em;
}
.card-meta {
  grid-row: 1;
  grid-column: 2;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  transition: color 0.4s ease;
}

@media (hover: hover) {
  .card a:hover { padding-left: 2.4rem; }
  .card a:hover::before { opacity: 1; transform: none; }
  .card a:hover .card-meta { color: var(--ink-dim); }
  .card:hover::after { transform: scaleX(1); }
}
.card a:focus-visible { padding-left: 2.4rem; }
.card a:focus-visible::before { opacity: 1; transform: none; }

/* placeholders shouldn't pretend to be links */
.card[data-soon] a { cursor: default; }
.card[data-soon] .card-title { color: var(--ink-dim); }

/* ─── homepage search ────────────────────────────────────────────── */

.find {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.6rem;
}
.find-label { color: var(--ink-faint); font-size: 0.8rem; }
.find input {
  flex: 1;
  min-width: 0;
  border: 0;
  padding: 0;
  background: none;
  color: var(--ink);
  font: inherit;
  letter-spacing: inherit;
}
.find input::placeholder { color: var(--ink-faint); }
.find input:focus { outline: none; }
.find:focus-within { border-bottom-color: var(--ink-dim); }
.find-count { color: var(--ink-faint); font-size: 0.75rem; font-variant-numeric: tabular-nums; }

.no-hits {
  margin: 1.2rem 0 0;
  color: var(--ink-faint);
  font-size: 0.85rem;
}

/* ─── foot ───────────────────────────────────────────────────────── */

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--ink-faint);
}
.foot p { margin: 0; }
.foot a { border-bottom: 1px solid var(--line); }
.foot a:hover { border-bottom-color: var(--ink-dim); color: var(--ink-dim); }
/* the claim in the footer is the whole point of the site — say it plainly */
.vow { color: var(--ink-dim); }

/* ─── entrance ───────────────────────────────────────────────────── */

[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}
html.ready [data-reveal] {
  animation: rise 1.1s var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 110ms + 100ms);
}
@keyframes rise { to { opacity: 1; transform: none; } }

/* rows ease in as they scroll into view, where supported */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .card {
      animation: row-in linear both;
      animation-timeline: view();
      animation-range: entry 10% cover 30%;
    }
  }
}
@keyframes row-in {
  from { opacity: 0; transform: translateY(1rem); }
  to   { opacity: 1; transform: none; }
}

/* ─── mobile ─────────────────────────────────────────────────────── */

@media (max-width: 34rem) {
  .card a { padding: 0.95rem 0.15rem; }
  .card a::before { top: 0.95rem; }
  .card-meta { font-size: 0.65rem; }
  .foot { flex-direction: column; }
}

/* no hover on touch: the row responds to the tap instead */
@media (hover: none) {
  .card a:active { padding-left: 2.4rem; }
  .card a:active::before { opacity: 1; transform: none; }
}

/* ─── no-JS ──────────────────────────────────────────────────────── */

html:not(.js) [data-reveal] { opacity: 1; transform: none; }
html:not(.js) .needs-js { display: none; }

.no-js-note {
  margin: 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: var(--sunk);
  color: var(--ink-dim);
  font-size: 0.85rem;
}
html.js .no-js-note { display: none; }

/* ─── calm down if asked ─────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  body, .logo, .dial { transition-duration: 0.01ms; }
  html.ready [data-reveal] { animation-duration: 0.01ms; animation-delay: 0s; }
  .card a, .card::after, .card a::before { transition-duration: 0.01ms; }
}