/* Dhiphos — page components (panels, form, FAQ, mobile nav, diagrams) */
/* Tokens --surface, --border, --field-bg live in styles.css :root */

/* ---------- Trust strip ---------- */

.trust-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 0 0 clamp(2rem, 5vw, 3rem);
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--rule);
  list-style: none;
}

@media (min-width: 640px) {
  .trust-strip {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.trust-strip li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.01em;
  padding: 0;
  border: 0;
}

.trust-strip strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 0.2rem;
  letter-spacing: 0;
}

/* ---------- Path / engage panels (editorial, not SaaS cards) ---------- */

.engage-grid,
.path-grid {
  display: grid;
  gap: 0;
  margin: 0 0 0.5rem;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

@media (min-width: 860px) {
  .engage-grid,
  .path-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 0;
  }

  .engage-card,
  .path-card {
    border-top: 1px solid var(--rule);
    padding-right: 1.25rem;
  }

  .engage-card + .engage-card,
  .path-card + .path-card {
    padding-left: 1.25rem;
    border-left: 1px solid var(--rule);
  }
}

.engage-card,
.path-card {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--rule);
  border-radius: 0;
  padding: 1.35rem 0 1.5rem;
}

.path-card h3,
.engage-card h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.path-card p,
.engage-card p {
  margin: 0 0 0.65rem;
  color: var(--fg);
  font-size: 0.95rem;
  line-height: 1.55;
}

.path-card p:last-child,
.engage-card p:last-child { margin-bottom: 0; }

.path-fit,
.engage-step {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 0.55rem;
}

.engage-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0.85rem 0 0;
}

/* ---------- Case / work cards ---------- */

.case-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .case-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 1.5rem;
  }
}

.case-card {
  background: transparent;
  border: 0;
  border-top: 1px solid var(--rule);
  border-radius: 0;
  padding: 1.25rem 0 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.case-industry {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0;
}

.case-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  color: var(--fg);
  line-height: 1.35;
}

.case-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--fg);
  line-height: 1.55;
  flex: 1;
}

.case-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 1.25rem 0 0;
  max-width: 60ch;
}

/* ---------- Diagram ---------- */

.diagram {
  margin: 1.5rem 0 2rem;
  padding: 1.1rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Size only — never force display here (that stacked light+dark imgs). */
.diagram img,
.diagram svg {
  width: 100%;
  height: auto;
  max-width: 640px;
  margin: 0 auto;
}

.diagram img.diagram-light { display: block; }
.diagram img.diagram-dark  { display: none; }

@media (prefers-color-scheme: dark) {
  .diagram img.diagram-light { display: none; }
  .diagram img.diagram-dark  { display: block; }
}

.diagram-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  margin: 0.85rem 0 0;
}

/* ---------- FAQ ---------- */

.faq-list {
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}

.faq-item {
  border-bottom: 1px solid var(--rule);
  padding: 0;
}

.faq-item summary {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.02rem;
  cursor: pointer;
  list-style: none;
  color: var(--fg);
  padding: 1rem 1.75rem 1rem 0;
  position: relative;
  transition: color 180ms ease;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "";
  position: absolute;
  right: 0.15rem;
  top: 50%;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 1.5px solid var(--accent);
  border-bottom: 1.5px solid var(--accent);
  transform: translateY(-65%) rotate(45deg);
  transition: transform 220ms ease;
}

.faq-item[open] summary::after,
.faq-item.is-open summary::after {
  transform: translateY(-20%) rotate(225deg);
}

.faq-item summary:hover { color: var(--accent); }

.faq-item summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Animated expand/collapse via grid rows */
.faq-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 280ms ease;
}

.faq-item.is-open > .faq-body,
.faq-item[open] > .faq-body {
  grid-template-rows: 1fr;
}

.faq-body-inner {
  overflow: hidden;
  min-height: 0;
}

.faq-body-inner p {
  margin: 0 0 1rem;
  color: var(--fg);
  max-width: 62ch;
  line-height: 1.65;
  font-size: 0.98rem;
  opacity: 0;
  transform: translateY(-0.35rem);
  transition: opacity 220ms ease 40ms, transform 220ms ease 40ms;
}

.faq-item.is-open .faq-body-inner p,
.faq-item[open] .faq-body-inner p {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .faq-body,
  .faq-body-inner p,
  .faq-item summary::after {
    transition: none;
  }
}

/* ---------- Inquiry form (mailto) + custom select ---------- */

.inquiry {
  display: grid;
  gap: 1rem;
  max-width: 36rem;
  margin: 0 0 1.25rem;
}

.inquiry-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.inquiry-field label {
  font-size: 0.9rem;
  color: var(--muted);
}

.inquiry-field .req {
  color: var(--accent);
}

.inquiry input,
.inquiry textarea,
.inquiry .select-trigger {
  font: inherit;
  color: var(--fg);
  background-color: var(--field-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  width: 100%;
  transition: border-color 120ms ease, background-color 120ms ease;
}

.inquiry input:focus,
.inquiry textarea:focus,
.inquiry .select-trigger:focus {
  outline: none;
  border-color: var(--accent);
}

.inquiry textarea { resize: vertical; min-height: 5.5rem; }

.inquiry input:-webkit-autofill,
.inquiry input:-webkit-autofill:hover,
.inquiry input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--fg);
  -webkit-box-shadow: 0 0 0 1000px var(--field-bg) inset;
  caret-color: var(--fg);
}

/* Hide native select visually; keep in DOM for form + a11y fallback */
.inquiry select.select-native {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.select {
  position: relative;
}

.select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  text-align: left;
  cursor: pointer;
  min-height: 2.85rem;
}

.select-trigger-label {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.select-trigger-label.is-placeholder {
  color: var(--muted);
}

.select-chevron {
  flex: 0 0 auto;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  margin-top: -0.2rem;
  transition: transform 120ms ease;
}

.select.is-open .select-chevron {
  transform: rotate(225deg);
  margin-top: 0.15rem;
}

.select-list {
  position: absolute;
  z-index: 40;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  margin: 0;
  padding: 0.35rem;
  list-style: none;
  background: var(--field-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-height: 16rem;
  overflow: auto;
  box-shadow: 0 10px 28px -16px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  visibility: hidden;
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.select-list[hidden] {
  display: none;
}

.select.is-open .select-list {
  display: block;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  visibility: visible;
}

@media (prefers-reduced-motion: reduce) {
  .select-list,
  .select-chevron { transition: none; }
}

.select-option {
  display: block;
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 0;
  border-radius: calc(var(--radius) - 1px);
  background: transparent;
  color: var(--fg);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.select-option:hover,
.select-option:focus {
  outline: none;
  background: color-mix(in srgb, var(--accent) 12%, var(--field-bg));
  color: var(--fg);
}

.select-option.is-selected {
  background: color-mix(in srgb, var(--accent) 16%, var(--field-bg));
}

.select-option.is-placeholder {
  color: var(--muted);
}

@supports not (color: color-mix(in srgb, red, blue)) {
  .select-option:hover,
  .select-option:focus,
  .select-option.is-selected {
    background: var(--surface);
  }
}

.inquiry-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.inquiry-status {
  min-height: 1.25em;
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}
.inquiry-status.ok  { color: var(--fg); }
.inquiry-status.err { color: var(--accent); }

.inquiry-hint {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0;
  max-width: 40ch;
}

/* ---------- Problem callout ---------- */

.problem-callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.15rem 1.25rem;
  margin: 0 0 1.5rem;
}

.problem-callout p {
  margin: 0 0 0.75rem;
  color: var(--fg);
  max-width: 60ch;
}

.problem-callout p:last-child { margin-bottom: 0; }

/* ---------- Roadmap note ---------- */

.roadmap-note {
  font-size: 0.92rem;
  color: var(--muted);
  margin: 1.25rem 0 0;
  max-width: 58ch;
}

.roadmap-note strong {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.85em;
  color: var(--fg);
}

/* ---------- Page hero (inner pages) ---------- */

.page-hero {
  margin: 0 0 clamp(2rem, 5vw, 3rem);
  padding-top: clamp(1rem, 3vw, 1.75rem);
  padding-bottom: clamp(1.75rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--rule);
}

.page-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin: 0 0 0.65rem;
}

/* ---------- Entry titles: sentence case (less startup) ---------- */

.entry-title-plain {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.entry-title-plain.is-spaced {
  margin-top: 2rem;
}

/* ---------- Mobile navigation ---------- */

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-left: auto;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  flex: 0 0 auto;
  z-index: 2;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav-toggle-bars {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: currentColor;
  position: relative;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}

.topnav.is-open .nav-toggle-bars {
  background: transparent;
  box-shadow: none;
}

.topnav.is-open .nav-toggle-bars::before,
.topnav.is-open .nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 1.1rem;
  height: 2px;
  background: var(--fg);
}

.topnav.is-open .nav-toggle-bars::before { transform: rotate(45deg); }
.topnav.is-open .nav-toggle-bars::after  { transform: rotate(-45deg); }

@media (min-width: 720px) {
  .nav-toggle { display: none; }
}

/* Show nav as overlay panel on small screens when open */
@media (max-width: 719px) {
  .topnav {
    flex-wrap: wrap;
    height: auto;
    min-height: var(--nav-h);
    padding-top: 0.55rem;
    padding-bottom: 0.55rem;
  }

  .topnav-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0;
    padding: 0.5rem 0 0.75rem;
    border-top: 1px solid var(--rule);
    margin-top: 0.55rem;
  }

  .topnav.is-open .topnav-nav {
    display: flex;
  }

  .topnav-nav a {
    padding: 0.7rem 0;
  }

  .topnav-nav a.is-active::after { display: none; }
}

@media (min-width: 720px) {
  .topnav-nav { display: inline-flex; }
}

/* Timeline (migration page) */
.timeline {
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
  border-left: 2px solid var(--border);
}

.timeline li {
  position: relative;
  padding: 0 0 1.35rem 1.25rem;
}

.timeline li:last-child { padding-bottom: 0; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -0.4rem;
  top: 0.35rem;
  width: 0.55rem;
  height: 0.55rem;
  background: var(--accent);
  transform: rotate(45deg);
}

.timeline strong {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.timeline p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}