/* ============================================================
   Digital Employees - marketing site stylesheet
   Plain CSS. No build step, no imports, no remote assets.
   Colour palette is a PLACEHOLDER brand palette (see CONTENT-TODO.md).
   ============================================================ */

/* ---------- Design tokens: light (default) ---------- */
:root {
  --bg:            #ffffff;
  --bg-alt:        #f4f6fa;
  --bg-sunken:     #eaeef5;
  --surface:       #ffffff;
  --border:        #d3dae6;
  --border-strong: #727f93;   /* >=3:1 vs all light backgrounds (WCAG 1.4.11) */

  --text:          #14181f;   /* 15.9:1 on --bg */
  --text-muted:    #4a5566;   /* 8.0:1  on --bg */
  --text-onaccent: #ffffff;

  --accent:        #17527d;   /* 8.0:1 on --bg  */
  --accent-hover:  #0f3a5a;
  --accent-soft:   #e3edf6;
  --accent-text:   #12456a;   /* accent tuned for text on --bg */

  --l0:            #1b6b4a;   /* level 0 */
  --l1:            #7a4b12;   /* level 1 */
  --l2:            #5a3a86;   /* level 2 */
  --l0-soft:       #e2f2ea;
  --l1-soft:       #f8eedd;
  --l2-soft:       #ece5f6;

  --ph-bg:         #fff3d6;
  --ph-border:     #b4841a;
  --ph-text:       #63480a;

  --focus:         #b3401f;

  --radius:        10px;
  --radius-lg:     16px;
  --shadow:        0 1px 2px rgba(20, 24, 31, .06), 0 8px 24px rgba(20, 24, 31, .07);
  --maxw:          72rem;

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

/* ---------- Design tokens: dark ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg:            #0e1218;
    --bg-alt:        #151b24;
    --bg-sunken:     #1b222d;
    --surface:       #171e27;
    --border:        #2c3644;
    --border-strong: #75849b;   /* >=3:1 vs all dark backgrounds (WCAG 1.4.11) */

    --text:          #eef2f7;   /* 15.4:1 on --bg */
    --text-muted:    #aab6c6;   /* 8.7:1  on --bg */
    --text-onaccent: #0e1218;

    --accent:        #6fb2e8;
    --accent-hover:  #9ccbf3;
    --accent-soft:   #17293a;
    --accent-text:   #8cc4f0;

    --l0:            #63c79c;
    --l1:            #e0ac5c;
    --l2:            #b699e6;
    --l0-soft:       #122b21;
    --l1-soft:       #2c2415;
    --l2-soft:       #221c33;

    --ph-bg:         #33290e;
    --ph-border:     #d8ac48;
    --ph-text:       #f2d79a;

    --focus:         #ff9b7a;

    --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 8px 24px rgba(0, 0, 0, .45);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  margin: 0 0 .5em;
  font-weight: 650;
  letter-spacing: -.01em;
}
h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.3vw, 2.1rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.02rem; }

p, ul, ol, dl, table { margin: 0 0 1rem; }
ul, ol { padding-left: 1.25rem; }
li { margin-bottom: .35rem; }

a { color: var(--accent-text); text-decoration-thickness: .07em; text-underline-offset: .16em; }
a:hover { color: var(--accent-hover); }

/* Focus indicator.
   The 2px gap between the element and the ring is filled with --bg by the
   box-shadow, so the ring is always adjacent to --bg on its inside edge and to
   the page background on its outside edge. Without that spacer the ring would
   sit directly against a primary button (--focus vs --accent is only 1.45:1 in
   light and 1.11:1 in dark) and fail WCAG 1.4.11. See CONTENT-TODO.md. */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--bg);
  border-radius: 3px;
}

code, kbd, .mono { font-family: var(--mono); font-size: .9em; }

hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

img { max-width: 100%; height: auto; }

/* ---------- Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section { padding-block: clamp(2.5rem, 1.5rem + 3vw, 4.5rem); }
.section--alt { background: var(--bg-alt); }
.section__intro { max-width: 46rem; }
.section__intro p { color: var(--text-muted); font-size: 1.05rem; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: var(--text-onaccent);
  padding: .7rem 1.1rem;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.5rem;
  padding-block: .75rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -.01em;
}
.brand:hover { color: var(--text); }
.brand__text { display: block; line-height: 1.15; }
.brand__sub {
  display: block;
  margin-top: .2rem;
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: 0;
}
.brand__mark {
  width: 1.9rem; height: 1.9rem;
  flex: none;
  border-radius: 7px;
  background: var(--accent);
  color: var(--text-onaccent);
  display: grid; place-items: center;
  font-size: .82rem; font-weight: 700; letter-spacing: .02em;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .15rem .35rem;
  margin: 0; padding: 0;
}
.site-nav li { margin: 0; }
.site-nav a {
  display: block;
  padding: .4rem .6rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
}
.site-nav a:hover { background: var(--bg-alt); color: var(--text); }
.site-nav a[aria-current="page"] {
  color: var(--accent-text);
  background: var(--accent-soft);
  font-weight: 650;
}
.site-header__spacer { flex: 1 1 auto; }

@media (max-width: 46rem) {
  .site-header { position: static; }
  .site-header__spacer { display: none; }
  .site-nav { width: 100%; }
  .site-nav ul { justify-content: flex-start; }
  .site-nav a { padding-inline: .45rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: .7rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn--primary { background: var(--accent); color: var(--text-onaccent); }
.btn--primary:hover { background: var(--accent-hover); color: var(--text-onaccent); }
.btn--ghost { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn--ghost:hover { background: var(--bg-alt); color: var(--text); }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }

/* ---------- Placeholder marker (see CONTENT-TODO.md) ---------- */
.ph {
  background: var(--ph-bg);
  color: var(--ph-text);
  border: 1px dashed var(--ph-border);
  border-radius: 5px;
  padding: 0 .35em;
  font-family: var(--mono);
  font-size: .86em;
  font-weight: 600;
  font-style: normal;
  white-space: normal;
}
.ph-block {
  display: block;
  background: var(--ph-bg);
  color: var(--ph-text);
  border: 1px dashed var(--ph-border);
  border-left-width: 5px;
  border-left-style: solid;
  border-radius: var(--radius);
  padding: .9rem 1.1rem;
  margin-bottom: 1.25rem;
  font-size: .93rem;
}
.ph-block > :last-child { margin-bottom: 0; }
.ph-block__label {
  display: block;
  font-family: var(--mono);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
  margin-bottom: .3rem;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding-block: clamp(2.75rem, 1.5rem + 5vw, 5.5rem);
}
.hero__grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 62rem) {
  .hero__grid { grid-template-columns: 1.15fr .85fr; }
}
.hero p.lead {
  font-size: clamp(1.05rem, 1rem + .35vw, 1.25rem);
  color: var(--text-muted);
  max-width: 40rem;
}
.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent-text);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: .3rem .8rem;
  margin-bottom: 1rem;
}

/* ---------- Cards ---------- */
.grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 40rem) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 52rem) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.card > :last-child { margin-bottom: 0; }
.card h3 { margin-bottom: .4rem; }
.card p { color: var(--text-muted); }
.card__more { margin-top: auto; padding-top: 1rem; font-weight: 600; }

/* ---------- Level blocks ---------- */
.level {
  border: 1px solid var(--border);
  border-top: 5px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.level > :last-child { margin-bottom: 0; }
.level--0 { border-top-color: var(--l0); }
.level--1 { border-top-color: var(--l1); }
.level--2 { border-top-color: var(--l2); }

.level__tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: .25rem .7rem;
  margin-bottom: .75rem;
}
.level--0 .level__tag { background: var(--l0-soft); color: var(--l0); }
.level--1 .level__tag { background: var(--l1-soft); color: var(--l1); }
.level--2 .level__tag { background: var(--l2-soft); color: var(--l2); }

.level__where {
  font-size: .88rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 1rem;
  padding-top: .75rem;
}

/* ---------- Data boundary diagram (pure CSS, no images) ---------- */
.boundary {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-block: 1.5rem;
}
@media (min-width: 46rem) { .boundary { grid-template-columns: 1fr 1fr; } }
.boundary__zone {
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  border: 2px solid var(--border-strong);
}
.boundary__zone--local { border-style: solid; background: var(--l0-soft); border-color: var(--l0); }
.boundary__zone--cloud { border-style: dashed; background: var(--bg-alt); }
.boundary__zone h3 { margin-bottom: .25rem; }
.boundary__zone p.small { color: var(--text-muted); font-size: .9rem; }
.boundary__zone ul { margin-bottom: 0; }

.yesno { list-style: none; padding-left: 0; }
.yesno li { padding-left: 1.7rem; position: relative; }
.yesno li::before {
  position: absolute; left: 0; top: 0;
  font-weight: 700;
  font-family: var(--mono);
}
.yesno--in li::before { content: "\002B"; color: var(--l0); }   /* plus sign */
.yesno--out li::before { content: "\00D7"; color: var(--focus); } /* multiplication sign */

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; margin-bottom: 1rem; }
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 34rem;
  font-size: .95rem;
}
caption {
  text-align: left;
  color: var(--text-muted);
  font-size: .9rem;
  padding-bottom: .6rem;
}
th, td {
  border: 1px solid var(--border);
  padding: .65rem .8rem;
  text-align: left;
  vertical-align: top;
}
thead th { background: var(--bg-sunken); font-weight: 650; }
tbody th { background: var(--bg-alt); font-weight: 650; }

/* Access-matrix diagonal: the one level each tier is named for and fully
   unlocks. Never colour-only — the cell text also says "this tier's own
   level". */
.cell-anchor { font-weight: 650; }
.cell-anchor--l0 { background: var(--l0-soft); border: 2px solid var(--l0); }
.cell-anchor--l1 { background: var(--l1-soft); border: 2px solid var(--l1); }
.cell-anchor--l2 { background: var(--l2-soft); border: 2px solid var(--l2); }

/* ---------- Pricing ----------
   Each tier is anchored 1:1 to exactly one level (Free=L0, Trial=L1,
   Enterprise=L2): same top-border + tag treatment as the .level blocks, so a
   tier card visually IS its level. Do not list multiple levels as co-equal
   features inside one tier card — lower levels appear only as
   "includes everything in …" and the next level only as a marked taste. */
.tier {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 5px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.tier--l0 { border-top-color: var(--l0); }
.tier--l1 { border-top-color: var(--l1); }
.tier--l2 { border-top-color: var(--l2); }
.tier--l0 .level__tag { background: var(--l0-soft); color: var(--l0); }
.tier--l1 .level__tag { background: var(--l1-soft); color: var(--l1); }
.tier--l2 .level__tag { background: var(--l2-soft); color: var(--l2); }
.tier__name { margin-bottom: .25rem; }
.tier__price { margin: .5rem 0 1rem; font-size: 1rem; }
.tier__list { list-style: none; padding-left: 0; margin-bottom: 1.25rem; }
.tier__list li { padding-left: 1.5rem; position: relative; font-size: .95rem; }
.tier__list li::before {
  content: "\2022";
  position: absolute; left: .35rem; top: 0;
  color: var(--accent-text); font-weight: 700;
}
.tier__cta { margin-top: auto; }
.badge {
  display: inline-block;
  font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  background: var(--accent-soft); color: var(--accent-text);
  border-radius: 999px; padding: .2rem .6rem; margin-bottom: .6rem;
}

/* ---------- Steps ---------- */
.steps { list-style: none; padding-left: 0; counter-reset: step; }
.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 2.75rem;
  margin-bottom: 1.1rem;
}
.steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: .05rem;
  width: 1.9rem; height: 1.9rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-text);
  display: grid; place-items: center;
  font-weight: 700; font-size: .9rem;
  font-family: var(--mono);
}

/* ---------- Misc ---------- */
.lede { font-size: 1.1rem; color: var(--text-muted); max-width: 46rem; }
.small { font-size: .9rem; }
.muted { color: var(--text-muted); }
.stack > * + * { margin-top: 1.25rem; }
.center { text-align: center; }
.narrow { max-width: 48rem; }

.callout {
  border: 1px solid var(--border);
  border-left: 5px solid var(--accent);
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1.25rem;
}
.callout > :last-child { margin-bottom: 0; }

.breadcrumb { font-size: .9rem; color: var(--text-muted); margin-bottom: .75rem; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; padding: 0; margin: 0; }
.breadcrumb li::after { content: "\203A"; margin-left: .4rem; color: var(--border-strong); }
.breadcrumb li:last-child::after { content: ""; }

.cta-band {
  background: var(--accent-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding-block: 2.5rem;
  font-size: .93rem;
}
.site-footer__grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: 1fr;
}
@media (min-width: 46rem) {
  .site-footer__grid { grid-template-columns: 1.4fr 1fr 1fr; }
}
.site-footer h2 {
  font-size: .8rem; text-transform: uppercase; letter-spacing: .09em;
  color: var(--text-muted); margin-bottom: .6rem;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: .35rem; }
.site-footer__legal {
  margin-top: 2rem; padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}
.site-footer__legal p { margin-bottom: .5rem; }

/* ---------- Print / reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}