/* ==========================================================================
   DateAndUnits design system
   Tokens, typography, components, motion. Contrast verified to WCAG AA+.
   ========================================================================== */

:root {
  /* Ink */
  --dau-ink: #0F172A;
  --dau-body: #334155;
  --dau-muted: #5B6B7F;

  /* Brand */
  --dau-accent: #4F46E5;
  --dau-accent-dk: #3730A3;
  --dau-accent-sf: #EEF0FE;
  --dau-success: #047857;

  /* Surfaces */
  --dau-bg: #FFFFFF;
  --dau-surface: #F8FAFC;
  --dau-line: #E2E8F0;
  --dau-line-strong: #CBD5E1;

  /* Elevation */
  --dau-sh-sm: 0 1px 2px rgba(15,23,42,.06);
  --dau-sh-md: 0 4px 14px rgba(15,23,42,.07);
  --dau-sh-lg: 0 14px 38px rgba(15,23,42,.10);
  --dau-ring: 0 0 0 3px rgba(79,70,229,.18);

  /* Geometry */
  --dau-r-sm: 8px;
  --dau-r-md: 12px;
  --dau-r-lg: 18px;
  --dau-r-pill: 999px;

  /* Motion */
  --dau-ease: cubic-bezier(.22,.61,.36,1);
  --dau-fast: 140ms;
  --dau-base: 240ms;
}


/* --------------------------------------------------------------------------
   Page surfaces — set explicitly so the design system does not depend on
   whatever background the theme happens to apply.
   -------------------------------------------------------------------------- */

body { background: var(--dau-surface); color: var(--dau-body); }
.entry-content, .site-content { color: var(--dau-body); }

/* --------------------------------------------------------------------------
   Typography — fluid scale. Overrides the template's oversized headings.
   -------------------------------------------------------------------------- */

.entry-content h1, .entry-content h2, .entry-content h3, .entry-content h4 {
  color: var(--dau-ink);
  letter-spacing: -0.018em;
  text-wrap: balance;
}

.entry-content h1 {
  font-size: clamp(2rem, 1.35rem + 2.6vw, 3.05rem) !important;
  line-height: 1.12 !important;
  font-weight: 700 !important;
  margin: 0 0 .7rem !important;
}

.entry-content h2 {
  font-size: clamp(1.4rem, 1.15rem + 1vw, 1.85rem) !important;
  line-height: 1.25 !important;
  font-weight: 650 !important;
  margin: 2.8rem 0 .9rem !important;
}

.entry-content h3 {
  font-size: clamp(1.08rem, 1rem + .35vw, 1.22rem) !important;
  line-height: 1.35 !important;
  font-weight: 640 !important;
  margin: 1.9rem 0 .5rem !important;
}

.entry-content p {
  color: var(--dau-body);
  line-height: 1.72;
  margin: 0 0 1.1rem;
  max-width: 68ch;
}

.entry-content a { color: var(--dau-accent); text-underline-offset: .2em; }
.entry-content a:hover { color: var(--dau-accent-dk); }

/* Lede: the AI-extractable direct answer. Deliberately prominent. */
.dau-lede {
  font-size: clamp(1.05rem, 1rem + .35vw, 1.2rem) !important;
  line-height: 1.6 !important;
  color: var(--dau-ink) !important;
  font-weight: 500;
  border-left: 3px solid var(--dau-accent);
  padding: .1rem 0 .1rem 1.05rem;
  margin: 0 0 1.4rem !important;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.dau-hero { max-width: 40rem; margin: 0 0 3.2rem; }

.dau-hero__sub {
  font-size: clamp(1.02rem, .97rem + .3vw, 1.16rem) !important;
  line-height: 1.68 !important;
  color: var(--dau-muted) !important;
  margin: 0 0 1.6rem !important;
}

.dau-hero__chips { display: flex; flex-wrap: wrap; gap: .5rem; }

.dau-hero__chips a {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .5rem 1rem;
  border: 1px solid var(--dau-line);
  border-radius: var(--dau-r-pill);
  background: var(--dau-bg);
  font-size: .9rem; font-weight: 520;
  color: var(--dau-body); text-decoration: none;
  transition: border-color var(--dau-fast) var(--dau-ease),
              color var(--dau-fast) var(--dau-ease),
              background var(--dau-fast) var(--dau-ease),
              transform var(--dau-fast) var(--dau-ease);
}
.dau-hero__chips a::before {
  content: ""; width: 5px; height: 5px; border-radius: 50%;
  background: var(--dau-accent); opacity: .55;
  transition: opacity var(--dau-fast) var(--dau-ease);
}
.dau-hero__chips a:hover {
  border-color: var(--dau-accent);
  color: var(--dau-accent-dk);
  background: var(--dau-accent-sf);
  transform: translateY(-1px);
}
.dau-hero__chips a:hover::before { opacity: 1; }

/* --------------------------------------------------------------------------
   Sections and tool grid
   -------------------------------------------------------------------------- */

.dau-section { margin: 0 0 3.4rem; }

.dau-section__head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; margin: 0 0 .25rem;
}
.dau-section__head h2 { margin: 0 !important; }

.dau-section__count {
  font-size: .78rem; font-weight: 600; letter-spacing: .03em;
  text-transform: uppercase; color: var(--dau-accent-dk);
  background: var(--dau-accent-sf);
  padding: .28rem .7rem; border-radius: var(--dau-r-pill);
  white-space: nowrap;
}

.dau-section__intro {
  color: var(--dau-muted) !important;
  line-height: 1.68 !important;
  margin: .5rem 0 1.5rem !important;
  max-width: 66ch;
}

.dau-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: .85rem; list-style: none; padding: 0; margin: 0;
}
.dau-grid li { margin: 0; }

.dau-card {
  position: relative; display: block; height: 100%;
  padding: 1.15rem 1.25rem 1.2rem;
  background: var(--dau-bg);
  border: 1px solid var(--dau-line);
  border-radius: var(--dau-r-md);
  text-decoration: none; color: inherit;
  box-shadow: var(--dau-sh-sm);
  transition: border-color var(--dau-base) var(--dau-ease),
              box-shadow var(--dau-base) var(--dau-ease),
              transform var(--dau-base) var(--dau-ease);
}
/* Accent rail that wipes in on hover. */
.dau-card::before {
  content: ""; position: absolute; left: 0; top: .9rem; bottom: .9rem;
  width: 3px; border-radius: 0 3px 3px 0;
  background: var(--dau-accent);
  transform: scaleY(0); transform-origin: center;
  transition: transform var(--dau-base) var(--dau-ease);
}
.dau-card:hover {
  border-color: var(--dau-line-strong);
  box-shadow: var(--dau-sh-md);
  transform: translateY(-2px);
}
.dau-card:hover::before { transform: scaleY(1); }
.dau-card:focus-visible { outline: none; box-shadow: var(--dau-ring); border-color: var(--dau-accent); }

.dau-card__icon {
  display: flex; align-items: center; justify-content: center;
  width: 2.1rem; height: 2.1rem; margin-bottom: .75rem;
  border-radius: var(--dau-r-sm);
  background: var(--dau-accent-sf); color: var(--dau-accent-dk);
}
.dau-card__icon svg { width: 1.15rem; height: 1.15rem; display: block; }

.dau-card__name {
  display: block; font-weight: 640; font-size: 1rem;
  line-height: 1.32; margin-bottom: .3rem; color: var(--dau-ink);
}
.dau-card__desc {
  display: block; font-size: .875rem; line-height: 1.55; color: var(--dau-muted);
}

/* --------------------------------------------------------------------------
   Calculator
   -------------------------------------------------------------------------- */

.dau-calc {
  background: var(--dau-bg);
  border: 1px solid var(--dau-line);
  border-radius: var(--dau-r-lg);
  box-shadow: var(--dau-sh-md);
  padding: 1.6rem;
  max-width: 44rem;
  margin: 0 0 2.4rem;
}

.dau-calc__answer {
  font-size: clamp(1.02rem, .97rem + .3vw, 1.14rem);
  font-weight: 560; line-height: 1.55; color: var(--dau-ink);
  padding: 0 0 1.15rem; margin: 0 0 1.35rem;
  border-bottom: 1px solid var(--dau-line);
}
.dau-calc__answer:empty { display: none; }

.dau-calc__form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: .9rem;
}

.dau-field { display: flex; flex-direction: column; gap: .38rem; }
.dau-field label {
  font-size: .76rem; font-weight: 620; letter-spacing: .035em;
  text-transform: uppercase; color: var(--dau-muted);
}
.dau-field input, .dau-field select {
  padding: .62rem .72rem;
  border: 1px solid var(--dau-line-strong);
  border-radius: var(--dau-r-sm);
  font-size: 1rem; font-family: inherit;
  background: var(--dau-bg); color: var(--dau-ink);
  transition: border-color var(--dau-fast) var(--dau-ease),
              box-shadow var(--dau-fast) var(--dau-ease);
}
.dau-field input:hover, .dau-field select:hover { border-color: var(--dau-accent); }
.dau-field input:focus, .dau-field select:focus {
  outline: none; border-color: var(--dau-accent); box-shadow: var(--dau-ring);
}

/* Result panel — the payoff, so it gets the accent treatment. */
.dau-calc__result {
  margin-top: 1.35rem; padding: 1.15rem 1.25rem;
  background: var(--dau-accent-sf);
  border: 1px solid transparent;
  border-radius: var(--dau-r-md);
  line-height: 1.55;
}
.dau-calc__result strong {
  display: block; font-size: clamp(1.32rem, 1.15rem + .7vw, 1.6rem);
  font-weight: 680; letter-spacing: -.02em; color: var(--dau-ink);
  margin-bottom: .2rem;
}
.dau-calc__result .dau-meta { color: var(--dau-muted); font-size: .88rem; }

/* Value swap animation, triggered from JS. */
@keyframes dauPop {
  0%   { opacity: 0; transform: translateY(4px); }
  100% { opacity: 1; transform: translateY(0); }
}
.dau-calc__result strong.is-updating { animation: dauPop var(--dau-base) var(--dau-ease); }

.dau-calc__quick {
  margin-top: 1.2rem; display: flex; flex-wrap: wrap;
  gap: .42rem; align-items: center;
}
.dau-calc__quick span {
  font-size: .76rem; font-weight: 620; letter-spacing: .035em;
  text-transform: uppercase; color: var(--dau-muted); margin-right: .25rem;
}
.dau-calc__quick button {
  padding: .38rem .78rem;
  border: 1px solid var(--dau-line);
  border-radius: var(--dau-r-pill);
  background: var(--dau-bg); color: var(--dau-body);
  font-size: .85rem; font-family: inherit; font-weight: 520;
  cursor: pointer;
  transition: border-color var(--dau-fast) var(--dau-ease),
              color var(--dau-fast) var(--dau-ease),
              background var(--dau-fast) var(--dau-ease),
              transform var(--dau-fast) var(--dau-ease);
}
.dau-calc__quick button:hover {
  border-color: var(--dau-accent); color: var(--dau-accent-dk);
  background: var(--dau-accent-sf); transform: translateY(-1px);
}
.dau-calc__quick button:active { transform: translateY(0); }
.dau-calc__quick button:focus-visible { outline: none; box-shadow: var(--dau-ring); }

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */

.dau-tablewrap {
  overflow-x: auto; margin: 0 0 2.2rem;
  border: 1px solid var(--dau-line); border-radius: var(--dau-r-md);
}
.dau-table { border-collapse: collapse; width: 100%; font-size: .94rem; min-width: 21rem; }
.dau-table th, .dau-table td { text-align: left; padding: .72rem .95rem; }
.dau-table thead th {
  font-weight: 620; font-size: .78rem; letter-spacing: .035em;
  text-transform: uppercase; color: var(--dau-muted);
  background: var(--dau-surface); white-space: nowrap;
  border-bottom: 1px solid var(--dau-line);
}
.dau-table tbody td { border-bottom: 1px solid var(--dau-line); color: var(--dau-body); }
.dau-table tbody tr:last-child td { border-bottom: 0; }
.dau-table tbody td:first-child { font-weight: 580; color: var(--dau-ink); }
.dau-table tbody tr { transition: background var(--dau-fast) var(--dau-ease); }
.dau-table tbody tr:hover { background: var(--dau-accent-sf); }

/* --------------------------------------------------------------------------
   Related links
   -------------------------------------------------------------------------- */

.dau-related { border-top: 1px solid var(--dau-line); margin-top: 3rem; padding-top: 1.6rem; }
.dau-related h2 { font-size: 1.02rem !important; margin: 0 0 .9rem !important; }
.dau-related ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.dau-related li { margin: 0; }
.dau-related a {
  display: inline-block; padding: .44rem .85rem;
  border: 1px solid var(--dau-line); border-radius: var(--dau-r-pill);
  font-size: .875rem; color: var(--dau-body); text-decoration: none;
  transition: border-color var(--dau-fast) var(--dau-ease),
              color var(--dau-fast) var(--dau-ease),
              background var(--dau-fast) var(--dau-ease);
}
.dau-related a:hover {
  border-color: var(--dau-accent); color: var(--dau-accent-dk); background: var(--dau-accent-sf);
}

/* --------------------------------------------------------------------------
   Contact form
   -------------------------------------------------------------------------- */

.dau-form {
  max-width: 34rem; margin: 0 0 2rem;
  border: 1px solid var(--dau-line); border-radius: var(--dau-r-lg);
  box-shadow: var(--dau-sh-sm);
  padding: 1.6rem; display: flex; flex-direction: column; gap: 1rem;
  background: var(--dau-bg);
}
.dau-form .dau-field input, .dau-form .dau-field textarea {
  padding: .62rem .72rem; border: 1px solid var(--dau-line-strong);
  border-radius: var(--dau-r-sm); font-size: 1rem; font-family: inherit;
  width: 100%; box-sizing: border-box;
  background: var(--dau-bg); color: var(--dau-ink);
  transition: border-color var(--dau-fast) var(--dau-ease), box-shadow var(--dau-fast) var(--dau-ease);
}
.dau-form .dau-field textarea { resize: vertical; line-height: 1.6; }
.dau-form .dau-field input:focus, .dau-form .dau-field textarea:focus {
  outline: none; border-color: var(--dau-accent); box-shadow: var(--dau-ring);
}
.dau-form__hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }
.dau-form__submit {
  align-self: flex-start; padding: .68rem 1.5rem; border: 0;
  border-radius: var(--dau-r-sm);
  background: var(--dau-accent); color: #fff;
  font-size: 1rem; font-family: inherit; font-weight: 600; cursor: pointer;
  transition: background var(--dau-fast) var(--dau-ease), transform var(--dau-fast) var(--dau-ease);
}
.dau-form__submit:hover { background: var(--dau-accent-dk); transform: translateY(-1px); }
.dau-form__submit:active { transform: translateY(0); }
.dau-form__submit:focus-visible { outline: none; box-shadow: var(--dau-ring); }

.dau-notice {
  padding: .9rem 1.1rem; border-radius: var(--dau-r-md);
  margin: 0 0 1.5rem; line-height: 1.55; font-size: .95rem;
}
.dau-notice--ok  { background: #ECFDF5; border: 1px solid #A7F3D0; color: #065F46; }
.dau-notice--err { background: #FEF2F2; border: 1px solid #FECACA; color: #991B1B; }

/* --------------------------------------------------------------------------
   Entrance motion — opt-out respected
   -------------------------------------------------------------------------- */

@keyframes dauRise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.dau-reveal { opacity: 0; }
.dau-reveal.is-visible { animation: dauRise 520ms var(--dau-ease) forwards; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .dau-reveal { opacity: 1 !important; }
  .dau-card:hover { transform: none; }
}