/* ==========================================================================
   Engineering SDLC Playbook: custom theme on top of MkDocs Material.
   Goal: minimalist, clean, everything cleanly visible. One desaturated accent,
   one neutral gray family, a frosted neutral header (no heavy colored bar),
   refined typography, and quiet motion. No pure black, no AI indigo gradient.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Palette tokens
   -------------------------------------------------------------------------- */

[data-md-color-scheme="default"] {
  --md-default-bg-color: #fcfcfb;
  --md-default-fg-color: #1b1b1a;
  --md-default-fg-color--light: #585855;
  --md-default-fg-color--lighter: rgba(27, 27, 26, 0.32);
  --md-default-fg-color--lightest: rgba(27, 27, 26, 0.06);

  --md-primary-fg-color: #0f7a66;
  --md-primary-fg-color--light: #0f7a66;
  --md-primary-fg-color--dark: #0b5e4f;
  --md-primary-bg-color: #ffffff;
  --md-primary-bg-color--light: rgba(255, 255, 255, 0.7);

  --md-accent-fg-color: #0b5e4f;
  --md-accent-fg-color--transparent: rgba(15, 122, 102, 0.1);

  --md-typeset-a-color: #0f7a66;
  --md-code-bg-color: #f3f3f0;
  --md-code-fg-color: #2a2a28;

  --md-footer-bg-color: #f7f7f4;
  --md-footer-bg-color--dark: #f7f7f4;
  --md-footer-fg-color: #1b1b1a;
  --md-footer-fg-color--light: #585855;
  --md-footer-fg-color--lighter: rgba(27, 27, 26, 0.4);

  /* local helpers */
  --pb-hairline: rgba(27, 27, 26, 0.1);
  --pb-surface: #ffffff;
  --pb-surface-2: #f6f6f3;
  --pb-muted: #6e6e6b;
  --pb-ink: #1b1b1a;
  --pb-shadow: 27, 27, 26;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: #0d0d0e;
  --md-default-fg-color: #ececeb;
  --md-default-fg-color--light: #a6a6a3;
  --md-default-fg-color--lighter: rgba(236, 236, 235, 0.3);
  --md-default-fg-color--lightest: rgba(236, 236, 235, 0.08);

  --md-primary-fg-color: #3fb793;
  --md-primary-fg-color--light: #3fb793;
  --md-primary-fg-color--dark: #2c8a6f;
  --md-primary-bg-color: #0d0d0e;
  --md-primary-bg-color--light: rgba(13, 13, 14, 0.7);

  --md-accent-fg-color: #5fd0ad;
  --md-accent-fg-color--transparent: rgba(63, 183, 147, 0.12);

  --md-typeset-a-color: #46c7a0;
  --md-code-bg-color: #18181b;
  --md-code-fg-color: #d8d8d5;

  --md-footer-bg-color: #131315;
  --md-footer-bg-color--dark: #131315;
  --md-footer-fg-color: #ececeb;
  --md-footer-fg-color--light: #a6a6a3;
  --md-footer-fg-color--lighter: rgba(236, 236, 235, 0.4);

  --pb-hairline: rgba(255, 255, 255, 0.09);
  --pb-surface: #161618;
  --pb-surface-2: #131315;
  --pb-muted: #9a9a98;
  --pb-ink: #ececeb;
  --pb-shadow: 0, 0, 0;
}

/* --------------------------------------------------------------------------
   2. Base typography
   -------------------------------------------------------------------------- */

html {
  scroll-behavior: smooth;
}

.md-typeset {
  font-size: 0.82rem;
  line-height: 1.7;
  letter-spacing: -0.003em;
}

.md-typeset h1 {
  font-weight: 700;
  font-size: 1.95rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.7em;
  color: var(--pb-ink);
  text-wrap: balance;
}

.md-typeset h2 {
  font-weight: 600;
  font-size: 1.38rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-top: 2.6em;
  text-wrap: balance;
}

.md-typeset h3 {
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: -0.012em;
  margin-top: 1.9em;
}

.md-typeset h4 {
  font-weight: 600;
  letter-spacing: -0.008em;
}

.md-typeset p,
.md-typeset li {
  text-wrap: pretty;
}

::selection {
  background: color-mix(in srgb, var(--md-primary-fg-color) 24%, transparent);
}

/* --------------------------------------------------------------------------
   3. Header and tabs: frosted neutral bar, not a heavy colored band
   -------------------------------------------------------------------------- */

.md-header {
  background-color: var(--pb-surface);
  background-color: color-mix(in srgb, var(--md-default-bg-color) 80%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  color: var(--md-default-fg-color);
  box-shadow: none;
  border-bottom: 1px solid var(--pb-hairline);
}

.md-header--shadow {
  box-shadow: none;
}

.md-header__title {
  font-weight: 600;
  letter-spacing: -0.015em;
}

.md-header__button.md-logo :is(img, svg) {
  color: var(--md-primary-fg-color);
}

.md-tabs {
  background-color: var(--pb-surface);
  background-color: color-mix(in srgb, var(--md-default-bg-color) 80%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  color: var(--md-default-fg-color);
  border-bottom: 1px solid var(--pb-hairline);
}

.md-tabs__link {
  opacity: 0.62;
  font-weight: 500;
  transition: opacity 0.25s ease, color 0.25s ease;
}

.md-tabs__link:hover {
  opacity: 1;
}

.md-tabs__item--active .md-tabs__link {
  opacity: 1;
  font-weight: 600;
  color: var(--md-primary-fg-color);
}

/* Search field as a quiet pill */
.md-search__form {
  background-color: var(--pb-surface-2);
  border: 1px solid var(--pb-hairline);
  border-radius: 10px;
  box-shadow: none;
}

.md-search__form:hover {
  background-color: var(--pb-surface-2);
}

[data-md-toggle="search"]:checked ~ .md-header .md-search__form {
  border-color: color-mix(in srgb, var(--md-primary-fg-color) 45%, var(--pb-hairline));
}

.md-search__input {
  color: var(--md-default-fg-color);
}

.md-search__input::placeholder,
.md-search__icon {
  color: var(--pb-muted);
}

/* --------------------------------------------------------------------------
   4. Navigation (left) and table of contents (right)
   -------------------------------------------------------------------------- */

.md-nav__title {
  color: var(--pb-muted);
  font-weight: 600;
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.md-nav__link {
  transition: color 0.2s ease;
}

.md-nav__link:hover {
  color: var(--md-primary-fg-color);
}

.md-nav__item .md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  color: var(--md-primary-fg-color);
  font-weight: 600;
}

.md-sidebar--secondary .md-nav__link--active {
  color: var(--md-primary-fg-color);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   5. Links
   -------------------------------------------------------------------------- */

.md-typeset a {
  color: var(--md-typeset-a-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

.md-typeset a:hover {
  color: var(--md-accent-fg-color);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

/* --------------------------------------------------------------------------
   6. Summary card: compact strip (label over value, side by side)
   This hides the empty markdown header row that previously caused a tall gap.
   -------------------------------------------------------------------------- */

.md-typeset .summary-card {
  margin: 1.2rem 0 2.4rem;
  border: 1px solid var(--pb-hairline);
  border-radius: 14px;
  background: var(--pb-surface-2);
  overflow: hidden;
}

.md-typeset .summary-card table {
  display: block;
  width: 100%;
  margin: 0;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  font-size: inherit;
}

.md-typeset .summary-card thead {
  display: none;
}

.md-typeset .summary-card tbody {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.md-typeset .summary-card tr {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 0.85rem 1.15rem;
  border: 0;
  border-left: 1px solid var(--pb-hairline);
  background: none;
}

.md-typeset .summary-card tr:first-child {
  border-left: 0;
}

.md-typeset .summary-card :is(td, th) {
  border: 0;
  padding: 0;
  text-align: left;
  white-space: normal;
  width: auto;
  background: none;
  min-width: 0;
}

.md-typeset .summary-card td:first-child {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--pb-muted);
}

.md-typeset .summary-card td:first-child strong {
  font-weight: inherit;
}

.md-typeset .summary-card td:nth-child(2) {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--pb-ink);
}

@media screen and (max-width: 44.9em) {
  .md-typeset .summary-card tbody {
    grid-template-columns: 1fr;
  }
  .md-typeset .summary-card tr {
    border-left: 0;
    border-top: 1px solid var(--pb-hairline);
  }
  .md-typeset .summary-card tr:first-child {
    border-top: 0;
  }
}

/* --------------------------------------------------------------------------
   7. Grid cards (landing page hubs and phase grid)
   -------------------------------------------------------------------------- */

.md-typeset .grid.cards > :is(ul, ol) > li {
  border: 1px solid var(--pb-hairline);
  border-radius: 16px;
  background: var(--pb-surface);
  padding: 1.05rem 1.2rem;
  box-shadow: 0 1px 2px rgba(var(--pb-shadow), 0.04);
  transition:
    transform 0.45s cubic-bezier(0.32, 0.72, 0, 1),
    box-shadow 0.45s cubic-bezier(0.32, 0.72, 0, 1),
    border-color 0.45s cubic-bezier(0.32, 0.72, 0, 1);
}

.md-typeset .grid.cards > :is(ul, ol) > li:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--md-primary-fg-color) 35%, var(--pb-hairline));
  box-shadow: 0 14px 34px -16px rgba(var(--pb-shadow), 0.22);
}

.md-typeset .grid.cards hr {
  margin: 0.6rem 0;
  border: 0;
  border-top: 1px solid var(--pb-hairline);
}

/* Bold card titles stay ink; only action links carry the accent */
.md-typeset .grid.cards strong a {
  color: var(--pb-ink);
}

.md-typeset .grid.cards strong a:hover {
  color: var(--md-primary-fg-color);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   8. Tables
   -------------------------------------------------------------------------- */

.md-typeset table:not([class]) {
  border: 1px solid var(--pb-hairline);
  border-radius: 12px;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  font-size: 0.76rem;
  box-shadow: none;
}

.md-typeset table:not([class]) th {
  background: var(--pb-surface-2);
  color: var(--pb-ink);
  font-weight: 600;
  border: 0;
  border-bottom: 1px solid var(--pb-hairline);
}

.md-typeset table:not([class]) td {
  border: 0;
  border-top: 1px solid var(--pb-hairline);
}

.md-typeset table:not([class]) tbody tr:first-child td {
  border-top: 0;
}

.md-typeset table:not([class]) tbody tr {
  transition: background-color 0.2s ease;
}

.md-typeset table:not([class]) tbody tr:hover {
  background: var(--md-accent-fg-color--transparent);
}

/* --------------------------------------------------------------------------
   9. Code
   -------------------------------------------------------------------------- */

.md-typeset code {
  border: 1px solid var(--pb-hairline);
  border-radius: 6px;
  padding: 0.1em 0.36em;
  font-size: 0.82em;
}

.md-typeset pre > code {
  border: 0;
  border-radius: 0;
  padding: 0.8em 1em;
}

.md-typeset :is(.highlight, .highlighttable, pre) {
  border-radius: 12px;
}

.md-typeset .highlight {
  border: 1px solid var(--pb-hairline);
  border-radius: 12px;
  overflow: hidden;
}

.md-typeset .highlight code {
  border: 0;
}

/* --------------------------------------------------------------------------
   10. Admonitions and details
   -------------------------------------------------------------------------- */

.md-typeset :is(.admonition, details) {
  border: 1px solid var(--pb-hairline);
  border-radius: 12px;
  box-shadow: none;
  font-size: 0.78rem;
}

.md-typeset :is(.admonition-title, summary) {
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   11. Buttons
   -------------------------------------------------------------------------- */

.md-typeset .md-button {
  border-radius: 999px;
  border: 1px solid var(--pb-hairline);
  padding: 0.5rem 1.15rem;
  font-weight: 600;
  transition:
    transform 0.3s cubic-bezier(0.32, 0.72, 0, 1),
    background-color 0.3s ease,
    border-color 0.3s ease,
    color 0.3s ease;
}

.md-typeset .md-button:hover {
  transform: translateY(-1px);
  background: var(--pb-surface-2);
  border-color: var(--md-primary-fg-color);
  color: var(--md-primary-fg-color);
}

.md-typeset .md-button:active {
  transform: translateY(0) scale(0.98);
}

.md-typeset .md-button--primary {
  background: var(--md-primary-fg-color);
  border-color: transparent;
  color: #ffffff;
}

.md-typeset .md-button--primary:hover {
  background: var(--md-accent-fg-color);
  border-color: transparent;
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   12. Mermaid, footer, focus, scrollbars
   -------------------------------------------------------------------------- */

.md-typeset .mermaid {
  margin: 1.8rem auto;
  padding: 1.1rem;
  text-align: center;
  border: 1px solid var(--pb-hairline);
  border-radius: 14px;
  background: var(--pb-surface-2);
  overflow-x: auto;
  cursor: zoom-in;
}

.md-typeset .mermaid svg {
  max-width: 100%;
  height: auto;
}

/* Full-screen diagram viewer (see assets/javascripts/diagram-zoom.js) */
body.pb-zoom-lock {
  overflow: hidden;
}

.pb-zoom {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  background: color-mix(in srgb, var(--md-default-bg-color) 78%, transparent);
  -webkit-backdrop-filter: blur(10px) saturate(150%);
  backdrop-filter: blur(10px) saturate(150%);
}

.pb-zoom.is-open {
  display: block;
}

.pb-zoom__stage {
  position: absolute;
  inset: 0;
  overflow: auto;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}

.pb-zoom__stage.is-grabbing {
  cursor: grabbing;
}

.pb-zoom__content {
  padding: 3rem 2rem 6rem;
  box-sizing: border-box;
}

.pb-zoom__content svg {
  display: block;
  margin: 0 auto;
}

.pb-zoom__toolbar {
  position: fixed;
  bottom: 1.4rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.15rem;
  padding: 0.3rem;
  background: var(--pb-surface);
  border: 1px solid var(--pb-hairline);
  border-radius: 999px;
  box-shadow: 0 12px 34px -14px rgba(var(--pb-shadow), 0.4);
}

.pb-zoom__toolbar button {
  border: 0;
  background: transparent;
  color: var(--pb-ink);
  font: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  min-width: 2rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.pb-zoom__toolbar button:hover {
  background: var(--pb-surface-2);
  color: var(--md-primary-fg-color);
}

.md-footer-meta {
  border-top: 1px solid var(--pb-hairline);
}

:focus-visible {
  outline: 2px solid var(--md-primary-fg-color);
  outline-offset: 2px;
  border-radius: 4px;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--md-default-fg-color--lighter) transparent;
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}

::-webkit-scrollbar-thumb {
  background: var(--md-default-fg-color--lighter);
  border: 3px solid var(--md-default-bg-color);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--pb-muted);
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}