/* ---------------------------------------------------------------------------
   Shared design system for every page and tool in this project.
   Tools should reuse these tokens and classes instead of shipping their own CSS
   framework. See docs/ADDING-A-TOOL.md.
   --------------------------------------------------------------------------- */

:root {
  color-scheme: light dark;

  --bg: #f7f7f5;
  --bg-elevated: #ffffff;
  --bg-sunken: #eeeeea;
  --border: #dcdcd4;
  --border-strong: #c3c3b8;
  --text: #1c1c1a;
  --text-muted: #6b6b63;
  --accent: #b8501f;
  --accent-soft: #f6ece6;
  --warn-bg: #fdf4e3;
  --warn-border: #e2c185;
  --warn-text: #7a5410;
  --ok: #2f6b3c;
  --err: #a32020;

  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgb(0 0 0 / 6%), 0 8px 24px -16px rgb(0 0 0 / 24%);

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --measure: 68ch;
  --page: 1100px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --bg-elevated: #1e1e23;
    --bg-sunken: #111114;
    --border: #32323a;
    --border-strong: #45454f;
    --text: #ececeb;
    --text-muted: #9a9aa3;
    --accent: #e8834d;
    --accent-soft: #2a2019;
    --warn-bg: #2a2216;
    --warn-border: #5c4a26;
    --warn-text: #e5c489;
    --ok: #6bbf7f;
    --err: #f08383;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px -16px rgb(0 0 0 / 70%);
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

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

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.015em; margin: 0 0 0.4em; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); }
h2 { font-size: 1.25rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 1em; }

code, pre, textarea.code { font-family: var(--font-mono); font-size: 0.9em; }

/* ----- layout ------------------------------------------------------------ */

.wrap {
  width: 100%;
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: 20px;
}

.stack > * + * { margin-top: var(--gap, 16px); }

/* ----- site header / footer ---------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 56px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

.site-header nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  font-size: 0.9rem;
}

.site-header nav a { color: var(--text-muted); text-decoration: none; }
.site-header nav a:hover { color: var(--text); text-decoration: underline; }

.site-footer {
  margin-top: 64px;
  border-top: 1px solid var(--border);
  padding-block: 24px 40px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.site-footer a { color: var(--text-muted); }

/* ----- hero -------------------------------------------------------------- */

.hero { padding-block: 56px 32px; }
.hero p.lede {
  max-width: var(--measure);
  font-size: 1.075rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ----- privacy notice ---------------------------------------------------- */

.notice {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px solid var(--warn-border);
  border-radius: var(--radius);
  background: var(--warn-bg);
  color: var(--warn-text);
  font-size: 0.9rem;
  line-height: 1.5;
}

.notice__icon { flex: none; font-size: 1rem; line-height: 1.5; }
.notice strong { font-weight: 650; }
.notice p { margin: 0; }
.notice p + p { margin-top: 6px; }
.notice a { color: inherit; }

/* ----- search + grid ----------------------------------------------------- */

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-block: 32px 18px;
}

.toolbar__count { color: var(--text-muted); font-size: 0.85rem; }

input[type="search"],
input[type="text"],
input[type="number"],
select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 11px;
}

input[type="search"] { min-width: 260px; flex: 1 1 260px; max-width: 380px; }

textarea {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  line-height: 1.5;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}

.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card__icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
}

.card__title { margin: 0; font-size: 1.05rem; }

.card__title a {
  color: var(--text);
  text-decoration: none;
}

.card__title a::after { content: ""; position: absolute; inset: 0; }
.card:hover .card__title a { color: var(--accent); }

.card__desc { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 6px;
  list-style: none;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
}

.card--add {
  border-style: dashed;
  background: transparent;
}

.empty {
  padding: 32px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}

/* ----- prose ------------------------------------------------------------- */

.prose { max-width: var(--measure); padding-block: 40px; }
.prose h2 { margin-top: 1.8em; }
.prose ul, .prose ol { padding-left: 1.25em; }
.prose li { margin-bottom: 0.4em; }
.prose code {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}
.prose pre {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  overflow-x: auto;
}
.prose pre code { background: none; border: 0; padding: 0; }

/* ----- tool pages -------------------------------------------------------- */

.tool-header { padding-block: 32px 8px; }
.tool-header .back {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 10px;
}
.tool-header .back:hover { color: var(--text); }
.tool-header p { color: var(--text-muted); margin-bottom: 0; }

.tool-body { padding-block: 24px 8px; }

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.panel + .panel { margin-top: 16px; }

.field { display: block; margin-bottom: 14px; }
.field > span {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

button, .button {
  font: inherit;
  font-weight: 550;
  cursor: pointer;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  color: var(--text);
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease;
}

button:hover, .button:hover { border-color: var(--accent); color: var(--accent); }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover { filter: brightness(1.08); color: #fff; }

.status { font-size: 0.85rem; min-height: 1.4em; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.stats li {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.stats .value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-variant-numeric: tabular-nums;
}

.stats .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.inline-field {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.inline-field > span {
  font-size: 0.85rem;
  color: var(--text-muted);
}