/* ══════════════════════════════════════════════════════════════
   TerraFlow — custom theme
   Brand palette: forest-green inspired by the site icon
   ══════════════════════════════════════════════════════════════ */

/* ── Brand colour tokens ─────────────────────────────────────── */
:root,
[data-md-color-scheme="default"] {
  --tf-green-950:  #0d2818;
  --tf-green-800:  #1e5c3a;
  --tf-green-700:  #2d6a4f;
  --tf-green-500:  #2d8a55;
  --tf-green-400:  #40a86e;
  --tf-green-300:  #60c48a;
  --tf-green-200:  #86d6a8;

  /* Material primary/accent overrides */
  --md-primary-fg-color:              #1e5c3a;
  --md-primary-fg-color--light:       #2d8a55;
  --md-primary-fg-color--dark:        #0d2818;
  --md-accent-fg-color:               #40a86e;
  --md-accent-fg-color--transparent:  rgba(64, 168, 110, 0.15);

  /* Softer link colour in body text */
  --md-typeset-a-color:               #2d6a4f;
}

[data-md-color-scheme="slate"] {
  --md-primary-fg-color:              #60c48a;
  --md-primary-fg-color--light:       #86d6a8;
  --md-primary-fg-color--dark:        #2d6a4f;
  --md-accent-fg-color:               #86d6a8;
  --md-accent-fg-color--transparent:  rgba(134, 214, 168, 0.15);

  --md-typeset-a-color:               #60c48a;
}

/* ── Site header — branded gradient ──────────────────────────── */
.md-header {
  background: linear-gradient(135deg, #1e5c3a 0%, #0d2818 100%);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

/* Keep header legible in both modes */
.md-header__title,
.md-header__topic,
.md-header__button,
.md-search__icon {
  color: rgba(255, 255, 255, 0.92) !important;
}

/* ── Navigation tabs — slightly elevated feel ────────────────── */
.md-tabs {
  background: #163d29;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.md-tabs__link {
  opacity: 0.75;
  font-weight: 500;
  letter-spacing: 0.02em;
}

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

/* ── Tables — rounded, subtle shadow ─────────────────────────── */
.md-typeset table:not([class]) {
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08);
  border: none;
}

.md-typeset table:not([class]) th {
  background-color: var(--tf-green-800);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.03em;
  border: none;
  padding: 0.65rem 1rem;
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background-color: var(--tf-green-700);
}

.md-typeset table:not([class]) td {
  border-top: 1px solid var(--md-default-fg-color--lightest);
  padding: 0.55rem 1rem;
}

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

/* ── Code blocks — softer radius, cleaner look ───────────────── */
.md-typeset pre {
  border-radius: 0.5rem;
}

.md-typeset code {
  border-radius: 0.25rem;
}

/* Language label badge on code blocks */
.md-typeset .highlight .filename,
.md-typeset .highlight span.filename {
  border-radius: 0.5rem 0.5rem 0 0;
  background: var(--tf-green-800);
  color: rgba(255,255,255,0.85);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ── Admonitions — softer corners ────────────────────────────── */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 0.5rem;
  border-width: 0 0 0 4px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.md-typeset .admonition-title,
.md-typeset summary {
  border-radius: 0.45rem 0.45rem 0 0;
  font-weight: 600;
}

/* ── Navigation sidebar — tighter, cleaner ───────────────────── */
.md-nav__title {
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--md-primary-fg-color);
}

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

/* ── Footer — subtle branding ────────────────────────────────── */
.md-footer {
  background: var(--tf-green-950);
}

.md-footer-meta {
  background: rgba(0, 0, 0, 0.25);
}

/* ── Search bar — slight rounding ────────────────────────────── */
.md-search__form {
  border-radius: 0.5rem;
}

/* ── Buttons (attr_list: { .md-button } ) ────────────────────── */
.md-typeset .md-button {
  border-radius: 0.4rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: background 0.18s, box-shadow 0.18s, transform 0.12s;
}

.md-typeset .md-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(30, 92, 58, 0.3);
}

.md-typeset .md-button--primary {
  background: var(--tf-green-800);
  border-color: var(--tf-green-800);
  color: #fff;
}

.md-typeset .md-button--primary:hover {
  background: var(--tf-green-700);
  border-color: var(--tf-green-700);
}

/* ── Grid cards (Material built-in) — TerraFlow style ───────── */
.md-typeset .grid.cards > ul > li,
.md-typeset .grid.cards > ol > li {
  border-radius: 0.5rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
}

.md-typeset .grid.cards > ul > li:hover,
.md-typeset .grid.cards > ol > li:hover {
  border-color: var(--md-primary-fg-color);
  box-shadow: 0 4px 16px rgba(30, 92, 58, 0.15);
  transform: translateY(-2px);
}

/* ── Tag chips ───────────────────────────────────────────────── */
.md-tag {
  border-radius: 1rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--md-accent-fg-color--transparent);
  color: var(--md-primary-fg-color);
  border: 1px solid var(--md-accent-fg-color);
}

/* ── TOC sidebar — active item highlight bar ─────────────────── */
.md-nav--secondary .md-nav__link--active {
  color: var(--md-primary-fg-color);
  border-left: 2px solid var(--md-primary-fg-color);
  padding-left: calc(0.6rem - 2px);
}

/* ── Mermaid diagrams — subtle card treatment ────────────────── */
.mermaid {
  background: var(--md-code-bg-color);
  border-radius: 0.5rem;
  padding: 1rem;
}

/* ── Typographic tweaks ──────────────────────────────────────── */
.md-typeset h1 {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.md-typeset h2 {
  font-weight: 700;
  letter-spacing: -0.01em;
  border-bottom: 2px solid var(--md-default-fg-color--lightest);
  padding-bottom: 0.3rem;
}

.md-typeset h3 {
  font-weight: 600;
}

/* ── Scroll-to-top button ────────────────────────────────────── */
.md-top {
  border-radius: 2rem;
  background: var(--tf-green-800);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

/* ── Enhanced Admonitions ────────────────────────────────────── */
/* Tip admonitions with green accent */
.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-left-color: #00c853;
}

.md-typeset .tip > .admonition-title,
.md-typeset .tip > summary {
  background-color: rgba(0, 200, 83, 0.1);
}

/* Example admonitions with purple accent */
.md-typeset .admonition.example,
.md-typeset details.example {
  border-left-color: #7c4dff;
}

.md-typeset .example > .admonition-title,
.md-typeset .example > summary {
  background-color: rgba(124, 77, 255, 0.1);
}

/* FAQ admonitions with blue accent */
.md-typeset .admonition.question,
.md-typeset details.question,
.md-typeset .admonition.faq,
.md-typeset details.faq {
  border-left-color: #00b0ff;
}

.md-typeset .question > .admonition-title,
.md-typeset .question > summary,
.md-typeset .faq > .admonition-title,
.md-typeset .faq > summary {
  background-color: rgba(0, 176, 255, 0.1);
}

/* ── Status Badges ───────────────────────────────────────────── */
.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.status-completed {
  background: rgba(0, 200, 83, 0.15);
  color: #00c853;
  border: 1px solid #00c853;
}

.status-in-progress {
  background: rgba(255, 171, 0, 0.15);
  color: #ffab00;
  border: 1px solid #ffab00;
}

.status-planned {
  background: rgba(0, 176, 255, 0.15);
  color: #00b0ff;
  border: 1px solid #00b0ff;
}

.status-experimental {
  background: rgba(124, 77, 255, 0.15);
  color: #7c4dff;
  border: 1px solid #7c4dff;
}

/* Dark mode adjustments */
[data-md-color-scheme="slate"] .status-completed {
  background: rgba(0, 200, 83, 0.2);
  color: #69f0ae;
}

[data-md-color-scheme="slate"] .status-in-progress {
  background: rgba(255, 171, 0, 0.2);
  color: #ffd740;
}

[data-md-color-scheme="slate"] .status-planned {
  background: rgba(0, 176, 255, 0.2);
  color: #40c4ff;
}

[data-md-color-scheme="slate"] .status-experimental {
  background: rgba(124, 77, 255, 0.2);
  color: #b388ff;
}

/* ── Enhanced Grid Cards ─────────────────────────────────────── */
.md-typeset .grid.cards > ul > li.card-green,
.md-typeset .grid.cards > ol > li.card-green {
  border-left: 3px solid var(--tf-green-500);
}

.md-typeset .grid.cards > ul > li.card-blue,
.md-typeset .grid.cards > ol > li.card-blue {
  border-left: 3px solid #00b0ff;
}

.md-typeset .grid.cards > ul > li.card-purple,
.md-typeset .grid.cards > ol > li.card-purple {
  border-left: 3px solid #7c4dff;
}

.md-typeset .grid.cards > ul > li.card-orange,
.md-typeset .grid.cards > ol > li.card-orange {
  border-left: 3px solid #ffab00;
}

/* ── Responsive Mermaid Diagrams ─────────────────────────────── */
.mermaid {
  background: var(--md-code-bg-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin: 1.5rem 0;
  border: 1px solid var(--md-default-fg-color--lightest);
  overflow-x: auto;
}

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

/* ── Keyboard Keys ───────────────────────────────────────────── */
.md-typeset .keys kbd {
  background: var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--light);
  border-radius: 0.25rem;
  box-shadow: 0 2px 0 var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color);
  font-family: var(--md-code-font-family);
  font-size: 0.85em;
  padding: 0.15em 0.4em;
}

/* ── Highlighted Text (mark) ─────────────────────────────────── */
.md-typeset mark {
  background-color: rgba(64, 168, 110, 0.3);
  color: inherit;
  border-radius: 0.2rem;
  padding: 0.1em 0.2em;
}

[data-md-color-scheme="slate"] .md-typeset mark {
  background-color: rgba(96, 196, 138, 0.25);
}

/* ── Breadcrumbs Enhancement ─────────────────────────────────── */
.md-path {
  font-size: 0.7rem;
  opacity: 0.7;
}

.md-path li:hover {
  opacity: 1;
}