/* Backhouse UI. Style chapter: minimal (warm monochrome, color only for status). Every value is a token from tokens.css. */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/IBMPlexSans-Variable.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/IBMPlexMono-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

:root {
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 160ms;
  --dur: 240ms;
  --lh-tight: 1.2;
  --lh-body: 1.6;
  --measure-text: 65ch;
  color-scheme: light;
}

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

html {
  background: var(--semantic-color-canvas);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-family: var(--semantic-font-body);
  font-size: var(--semantic-type-md);
  line-height: var(--lh-body);
  color: var(--semantic-color-text);
  background: var(--semantic-color-canvas);
  font-feature-settings: "tnum" 1;
  touch-action: manipulation;
}

h1, h2, h3 {
  font-family: var(--semantic-font-heading);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  margin: 0;
  font-weight: 600;
}
h1 { font-size: var(--semantic-type-2xl); }
h2 { font-size: var(--semantic-type-lg); }
h3 { font-size: var(--semantic-type-md); }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; }
img { display: block; max-width: 100%; }
svg.icon { width: var(--semantic-size-icon); height: var(--semantic-size-icon); flex: none; }

.mono { font-family: var(--semantic-font-code); font-size: var(--semantic-type-sm); }
.muted { color: var(--semantic-color-text-muted); }
.lead { color: var(--semantic-color-text-muted); max-width: var(--measure-text); }
.eyebrow { color: var(--semantic-color-text-muted); font-size: var(--semantic-type-xs); letter-spacing: 0.06em; text-transform: uppercase; }
.with-icon { display: inline-flex; align-items: center; gap: var(--semantic-space-hairline); }

/* Focus: one ring for everything, visible on every background. */
:focus-visible {
  outline: var(--semantic-size-outline) solid var(--semantic-color-focus);
  outline-offset: var(--semantic-size-outline);
}
.skip {
  position: absolute;
  left: var(--semantic-space-md);
  top: var(--semantic-space-md);
  padding: var(--semantic-space-xs) var(--semantic-space-sm);
  background: var(--semantic-color-text);
  color: var(--semantic-color-surface);
  border-radius: var(--semantic-radius-control);
  transform: translateY(-200%);
  z-index: 100;
}
.skip:focus-visible { transform: none; }

/* ---------- shell ---------- */
.top {
  border-bottom: 1px solid var(--semantic-color-line);
  background: var(--semantic-color-canvas);
  padding-top: env(safe-area-inset-top);
}
.top-inner, .wrap, .foot {
  width: 100%;
  max-width: var(--semantic-size-wide);
  margin-inline: auto;
  padding-inline: max(var(--semantic-space-md), env(safe-area-inset-left));
}
.top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--semantic-space-md);
  min-height: calc(var(--semantic-size-touch) + var(--semantic-space-sm));
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--semantic-space-xs);
  font-weight: 600;
  text-decoration: none;
  min-height: var(--semantic-size-touch);
}
.top-right { display: flex; align-items: center; gap: var(--semantic-space-sm); }
.role {
  font-size: var(--semantic-type-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--semantic-color-text-muted);
}
.wrap {
  flex: 1;
  padding-block: var(--semantic-space-lg) var(--semantic-space-2xl);
}
.wrap:focus { outline: none; }
.foot {
  padding-block: var(--semantic-space-lg) max(var(--semantic-space-lg), env(safe-area-inset-bottom));
  font-size: var(--semantic-type-xs);
  color: var(--semantic-color-text-muted);
  border-top: 1px solid var(--semantic-color-line);
}
.flash {
  display: flex;
  align-items: center;
  gap: var(--semantic-space-xs);
  padding: var(--semantic-space-sm) var(--semantic-space-md);
  margin-bottom: var(--semantic-space-lg);
  border-radius: var(--semantic-radius-block);
  background: var(--semantic-color-status-done-bg);
  color: var(--semantic-color-status-done-fg);
  font-weight: 500;
}

/* ---------- buttons ---------- */
.btn, .btn-secondary, .btn-text, .btn-icon {
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--semantic-space-xs);
  min-height: var(--semantic-size-touch);
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn {
  padding: var(--component-button-padding-y) var(--component-button-padding-x);
  background: var(--component-button-bg);
  color: var(--component-button-fg);
  border: 1px solid var(--component-button-bg);
  border-radius: var(--component-button-radius);
  font-weight: 500;
}
.btn:hover { background: var(--component-button-bg-hover); border-color: var(--component-button-bg-hover); }
.btn:active { transform: scale(0.98); }
.btn-secondary {
  background: var(--semantic-color-surface);
  color: var(--semantic-color-text);
  border-color: var(--semantic-color-line-strong);
}
.btn-secondary:hover { background: var(--semantic-color-surface-alt); border-color: var(--semantic-color-text); }
.btn-text {
  padding: var(--semantic-space-xs) var(--semantic-space-sm);
  background: none;
  border: 0;
  color: var(--semantic-color-text-muted);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.btn-text:hover { color: var(--semantic-color-text); }
.btn-icon {
  width: var(--semantic-size-touch);
  padding: 0;
  background: none;
  border: 0;
  color: var(--semantic-color-icon-muted);
  border-radius: var(--semantic-radius-control);
}
.btn-icon:hover, .btn-icon[aria-pressed="true"] { color: var(--semantic-color-text); }
.btn[disabled], .btn-secondary[disabled] { opacity: 0.5; cursor: progress; }
.is-busy .btn, .is-busy .btn-secondary { pointer-events: none; }

/* ---------- forms ---------- */
.form { display: grid; gap: var(--semantic-space-lg); margin-top: var(--semantic-space-lg); max-width: var(--semantic-size-measure); }
.form-compact { margin-top: var(--semantic-space-xl); }
.field { display: grid; gap: var(--semantic-space-xs); border: 0; padding: 0; margin: 0; min-width: 0; }
.field > label, .field > legend { font-weight: 500; }
legend { padding: 0; margin-bottom: var(--semantic-space-xs); }
.req { font-weight: 400; color: var(--semantic-color-text-muted); font-size: var(--semantic-type-sm); }
.hint { color: var(--semantic-color-text-muted); font-size: var(--semantic-type-sm); }
.error {
  display: flex;
  align-items: flex-start;
  gap: var(--semantic-space-hairline);
  color: var(--semantic-color-danger);
  font-size: var(--semantic-type-sm);
  font-weight: 500;
}
.error.summary { font-size: var(--semantic-type-md); }
input[type="text"], input[type="password"], input[type="number"], select, textarea {
  font: inherit;
  width: 100%;
  min-height: var(--semantic-size-touch);
  padding: var(--component-input-padding-y) var(--component-input-padding-x);
  color: var(--semantic-color-text);
  background: var(--component-input-bg);
  border: 1px solid var(--component-input-border);
  border-radius: var(--component-input-radius);
  transition: border-color var(--dur-fast) var(--ease);
}
input::placeholder, textarea::placeholder { color: var(--semantic-color-text-muted); opacity: 1; }
input:hover, select:hover, textarea:hover { border-color: var(--semantic-color-text); }
.field-error input, .field-error select, .field-error textarea, .field-error .photo-trigger { border-color: var(--semantic-color-danger); }
textarea { resize: vertical; min-height: calc(var(--semantic-size-touch) * 2); }
select {
  appearance: none;
  padding-right: var(--semantic-space-xl);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23111111' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9l6 6 6-6'/></svg>");
  background-repeat: no-repeat;
  background-position: right var(--semantic-space-sm) center;
  background-size: var(--semantic-size-icon);
}
.input-row { display: flex; gap: var(--semantic-space-xs); align-items: center; }
.input-row input { flex: 1; }
.choices { display: grid; gap: var(--semantic-space-xs); }
.choice {
  display: flex;
  gap: var(--semantic-space-sm);
  align-items: flex-start;
  padding: var(--semantic-space-sm) var(--semantic-space-md);
  border: 1px solid var(--semantic-color-line-strong);
  border-radius: var(--semantic-radius-control);
  background: var(--semantic-color-surface);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}
.choice:hover { border-color: var(--semantic-color-text); }
.choice:has(input:checked) { border-color: var(--semantic-color-text); background: var(--semantic-color-surface-alt); box-shadow: inset 0 0 0 1px var(--semantic-color-text); }
.choice input { margin: 0; margin-top: var(--semantic-space-hairline); accent-color: var(--semantic-color-text); width: var(--semantic-size-icon); height: var(--semantic-size-icon); flex: none; }
.choice-body { display: grid; }
.choice-title { font-weight: 500; }
.choice-help { color: var(--semantic-color-text-muted); font-size: var(--semantic-type-sm); }
.actions { display: flex; flex-wrap: wrap; gap: var(--semantic-space-sm); align-items: center; }
.inline-form { display: inline-block; margin-bottom: var(--semantic-space-lg); }

/* Photo picker: the native input stays for no-JS; the label is the visible control. */
.photos { display: grid; gap: var(--semantic-space-sm); }
.photos input[type="file"] { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; clip: rect(0 0 0 0); }
.photos input[type="file"]:focus-visible + .photo-trigger { outline: var(--semantic-size-outline) solid var(--semantic-color-focus); outline-offset: var(--semantic-size-outline); }
.photo-trigger { width: fit-content; }
.photos.no-js input[type="file"] { position: static; width: auto; height: auto; opacity: 1; clip: auto; }
.photos.no-js .photo-trigger { display: none; }
input[type="file"]:not(.photos *) { font: inherit; width: 100%; padding: var(--semantic-space-xs) 0; }
.photo-previews { display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--semantic-size-thumb), 1fr)); gap: var(--semantic-space-xs); }
.photo-previews:empty { display: none; }
.photo-previews li { position: relative; }
.photo-previews img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--semantic-radius-block); background: var(--semantic-color-skeleton); }
.preview-remove {
  position: absolute;
  top: var(--semantic-space-hairline);
  right: var(--semantic-space-hairline);
  width: var(--semantic-size-touch);
  height: var(--semantic-size-touch);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--semantic-color-surface);
  color: var(--semantic-color-text);
  border: 0;
  border-radius: var(--semantic-radius-pill);
  cursor: pointer;
}
.preview-size { font-size: var(--semantic-type-xs); color: var(--semantic-color-text-muted); margin-top: var(--semantic-space-hairline); }

/* ---------- login ---------- */
.page-login .wrap { display: grid; place-content: start center; }
.login { width: min(100%, var(--semantic-size-field)); padding-top: var(--semantic-space-2xl); }
.login .lead { margin-top: var(--semantic-space-xs); }

/* ---------- list ---------- */
.page-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--semantic-space-md); margin-bottom: var(--semantic-space-lg); }
.filters { display: flex; gap: var(--semantic-space-hairline); overflow-x: auto; margin-bottom: var(--semantic-space-xs); scrollbar-width: none; font-size: var(--semantic-type-sm); }
.filters::-webkit-scrollbar { display: none; }
.filters a {
  display: inline-flex;
  align-items: center;
  gap: var(--semantic-space-hairline);
  min-height: var(--semantic-size-touch);
  padding: 0 var(--semantic-space-xs);
  white-space: nowrap;
  text-decoration: none;
  color: var(--semantic-color-text-muted);
  border-bottom: var(--semantic-size-outline) solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.filters a:hover { color: var(--semantic-color-text); }
.filters a[aria-current="page"] { color: var(--semantic-color-text); border-bottom-color: var(--semantic-color-text); font-weight: 500; }
.count { font-family: var(--semantic-font-code); font-size: var(--semantic-type-xs); color: var(--semantic-color-text-muted); }
.tickets li { border-bottom: 1px solid var(--semantic-color-line); }
.ticket-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--semantic-space-md);
  padding: var(--semantic-space-md) 0;
  text-decoration: none;
  transition: background-color var(--dur-fast) var(--ease);
}
.ticket-row:hover { background: var(--semantic-color-surface-alt); box-shadow: 0 0 0 var(--semantic-space-xs) var(--semantic-color-surface-alt); }
.ticket-main { min-width: 0; display: grid; gap: var(--semantic-space-hairline); }
.ticket-title { font-weight: 500; overflow-wrap: anywhere; }
.ticket-meta { display: flex; flex-wrap: wrap; gap: var(--semantic-space-xs) var(--semantic-space-sm); color: var(--semantic-color-text-muted); font-size: var(--semantic-type-sm); }
.ticket-meta .mono { font-size: var(--semantic-type-xs); }
.urgent {
  display: inline-flex;
  align-items: center;
  gap: var(--semantic-space-hairline);
  margin-right: var(--semantic-space-xs);
  padding: 0 var(--component-tag-padding-x);
  border-radius: var(--component-tag-radius);
  background: var(--semantic-color-urgent-bg);
  color: var(--semantic-color-urgent-fg);
  font-size: var(--semantic-type-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: middle;
}
.urgent .icon { width: var(--semantic-space-sm); height: var(--semantic-space-sm); }
.tag {
  flex: none;
  display: inline-flex;
  align-items: center;
  padding: var(--component-tag-padding-y) var(--component-tag-padding-x);
  border-radius: var(--component-tag-radius);
  font-size: var(--semantic-type-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.tag-open { background: var(--semantic-color-status-open-bg); color: var(--semantic-color-status-open-fg); }
.tag-in_progress { background: var(--semantic-color-status-progress-bg); color: var(--semantic-color-status-progress-fg); }
.tag-done { background: var(--semantic-color-status-done-bg); color: var(--semantic-color-status-done-fg); }
.empty { padding: var(--semantic-space-2xl) 0; max-width: var(--measure-text); display: grid; gap: var(--semantic-space-xs); }
.empty-title { font-weight: 600; font-size: var(--semantic-type-lg); }
.empty .btn-secondary { width: fit-content; margin-top: var(--semantic-space-sm); }

/* ---------- detail ---------- */
.back { display: inline-flex; align-items: center; min-height: var(--semantic-size-touch); color: var(--semantic-color-text-muted); font-size: var(--semantic-type-sm); }
.back::before { content: "\2190"; margin-right: var(--semantic-space-hairline); }
.back:hover { color: var(--semantic-color-text); }
.ticket-head { display: grid; gap: var(--semantic-space-xs); margin: var(--semantic-space-xs) 0 var(--semantic-space-lg); max-width: var(--semantic-size-measure); }
.ticket-head h1 { overflow-wrap: anywhere; }
.ticket-head .urgent { margin-right: var(--semantic-space-sm); font-size: var(--semantic-type-sm); vertical-align: middle; }
.ticket-head .tag { width: fit-content; }
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--semantic-space-md) var(--semantic-space-lg); margin: 0; max-width: var(--semantic-size-measure); }
.facts div { display: grid; gap: 0; }
.facts dt { font-size: var(--semantic-type-xs); color: var(--semantic-color-text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.block { padding: var(--semantic-space-lg) 0; border-top: 1px solid var(--semantic-color-line); margin-top: var(--semantic-space-lg); display: grid; gap: var(--semantic-space-md); max-width: var(--semantic-size-measure); }
.block > h2 + p { margin-top: calc(var(--semantic-space-xs) * -1); }
.prose { white-space: pre-line; max-width: var(--measure-text); overflow-wrap: anywhere; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--semantic-size-thumb-lg), 1fr)); gap: var(--semantic-space-xs); }
.gallery a { display: block; border-radius: var(--semantic-radius-block); overflow: hidden; }
.gallery img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; background: var(--semantic-color-skeleton); transition: transform var(--dur) var(--ease); }
.gallery a:hover img { transform: scale(1.02); }
.resolution { background: var(--semantic-color-surface); border: 1px solid var(--semantic-color-line); border-radius: var(--semantic-radius-block); padding: var(--semantic-space-lg); margin-top: var(--semantic-space-lg); }
.support .form { margin-top: 0; }
.timeline { display: grid; gap: var(--semantic-space-md); }
.event { display: grid; gap: var(--semantic-space-hairline); padding-left: var(--semantic-space-md); border-left: var(--semantic-size-outline) solid var(--semantic-color-line); }
.event-comment { border-left-color: var(--semantic-color-text); }
.event-closed { border-left-color: var(--semantic-color-status-done-fg); }
.event-head time { font-size: var(--semantic-type-sm); }
.event-body { white-space: pre-line; overflow-wrap: anywhere; }

/* ---------- responsive ---------- */
@media (max-width: 37.4375em) {
  .page-head .btn { width: 100%; }
  .filters { margin-inline: calc(var(--semantic-space-md) * -1); padding-inline: var(--semantic-space-md); }
  .ticket-row { align-items: flex-start; flex-direction: column; gap: var(--semantic-space-xs); }
  .facts { grid-template-columns: 1fr 1fr; }
  .actions .btn { width: 100%; }
}
@media (min-width: 48em) {
  .choices { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .facts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .wrap { padding-block: var(--semantic-space-xl) var(--semantic-space-3xl); }
}

/* ---------- motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 1ms !important; animation: none !important; }
  .btn:active { transform: none; }
  .gallery a:hover img { transform: none; }
}