/* ============================================================
   MERIDIAN — PHASE 2: intro, services, workflow, audience, credibility
   ============================================================ */

section[id] { position: relative; z-index: 2; }

/* ---- Intro ---- */
.intro {
  padding-block: clamp(5rem, 14vw, 9rem);
  border-top: 1px solid var(--line);
}
.intro-statement {
  font-size: var(--fs-xl);
  color: var(--ink);
  max-width: 16ch;
}
.intro-body {
  margin-top: 2rem;
  max-width: 56ch;
  font-size: var(--fs-md);
  color: var(--concrete);
  line-height: 1.6;
}
@media (min-width: 1000px) {
  .intro .wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 3rem; align-items: end; }
}

/* ---- Services ---- */
.services {
  padding-block: clamp(3rem, 10vw, 6rem);
  border-top: 1px solid var(--line);
}
.services-head { max-width: 44ch; margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.services-head h2 { font-size: var(--fs-lg); color: var(--ink); }

.services-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 950px) {
  .services-layout { grid-template-columns: 1.15fr 0.85fr; gap: clamp(2rem, 5vw, 5rem); }
}

.service-row {
  border-top: 1px solid var(--line);
}
.service-row:last-child { border-bottom: 1px solid var(--line); }

.service-row-head {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: clamp(1rem, 3vw, 2.5rem);
  padding-block: 1.4rem;
  text-align: left;
}
.service-num {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.04em;
  width: 3.2rem;
  flex-shrink: 0;
}
.service-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  font-weight: 480;
  color: var(--ink);
  flex-grow: 1;
  transition: transform var(--dur-fast) var(--ease-architectural);
}
.service-row-head:hover .service-title,
.service-row-head:focus-visible .service-title { transform: translateX(10px); }
.service-caption {
  display: none;
  font-size: var(--fs-sm);
  color: var(--concrete);
}
@media (min-width: 700px) { .service-caption { display: block; } }

.service-chevron {
  width: 16px; height: 16px;
  flex-shrink: 0;
  color: var(--concrete);
  transition: transform var(--dur-fast) var(--ease-architectural);
}
.service-row[data-open="true"] .service-chevron { transform: rotate(45deg); color: var(--accent); }

.service-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-mid) var(--ease-architectural);
}
.service-row[data-open="true"] .service-body { grid-template-rows: 1fr; }
.service-body-inner { overflow: hidden; }
.service-body p {
  max-width: 48ch;
  padding-bottom: 1.5rem;
  color: var(--concrete);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

/* Preview panel — desktop only */
.services-preview {
  display: none;
  position: sticky;
  top: calc(var(--header-h) + 2rem);
  align-self: start;
  aspect-ratio: 4 / 5;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 2rem;
  flex-direction: column;
  justify-content: space-between;
}
@media (min-width: 950px) { .services-preview { display: flex; } }

.services-preview .preview-icon {
  width: 64px; height: 64px;
  color: var(--charcoal);
  transition: opacity var(--dur-fast) var(--ease-architectural);
}
.services-preview .preview-icon path,
.services-preview .preview-icon line,
.services-preview .preview-icon circle,
.services-preview .preview-icon rect { transition: d var(--dur-fast); }

.preview-label {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  color: var(--concrete);
}
.preview-title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  color: var(--ink);
  margin-top: 0.4rem;
}

/* ---- Workflow ---- */
.workflow {
  height: 420vh;
  border-top: 1px solid var(--line);
}
.workflow-sticky {
  position: sticky;
  top: 0;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}
.workflow-head { padding-inline: var(--gutter); margin-bottom: clamp(2rem, 6vw, 4rem); }
.workflow-head h2 { font-size: var(--fs-lg); color: var(--ink); max-width: 30ch; }

.workflow-progress {
  height: 1px;
  background: var(--line);
  margin-inline: var(--gutter);
  margin-bottom: clamp(2.5rem, 8vw, 5rem);
  position: relative;
}
.workflow-progress-fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  width: 0%;
  background: var(--accent);
  transition: width var(--dur-fast) linear;
}

.workflow-track {
  display: flex;
  gap: clamp(3rem, 8vw, 7rem);
  padding-inline: var(--gutter);
  will-change: transform;
}
.workflow-stage {
  flex: 0 0 clamp(220px, 26vw, 320px);
  opacity: 0.35;
  transition: opacity var(--dur-mid) var(--ease-architectural);
}
.workflow-stage[data-active="true"] { opacity: 1; }

.stage-num {
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.05em;
}
.stage-icon { width: 46px; height: 46px; color: var(--charcoal); margin-block: 1.25rem; }
.stage-title { font-family: var(--font-display); font-size: var(--fs-lg); color: var(--ink); }
.stage-desc { margin-top: 0.6rem; font-size: var(--fs-sm); color: var(--concrete); max-width: 26ch; }

/* ---- Audience panels ---- */
.audience {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .audience { grid-template-columns: 1fr 1fr; }
}
.audience-panel {
  padding: clamp(3rem, 7vw, 5.5rem) var(--gutter);
  position: relative;
}
.audience-panel:first-child {
  background: var(--charcoal);
  color: var(--ivory);
}
.audience-panel:last-child {
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--line);
}
@media (min-width: 900px) {
  .audience-panel:last-child { border-top: none; border-left: 1px solid var(--line); }
}
.audience-panel::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-on-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-on-dark) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.4;
}
.audience-panel:last-child::before {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
}
.audience-kicker { font-size: var(--fs-xs); letter-spacing: 0.05em; opacity: 0.7; position: relative; }
.audience-panel h3 {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  margin-top: 0.75rem;
  max-width: 12ch;
  position: relative;
}
.audience-list {
  margin-top: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  position: relative;
}
.audience-list li {
  font-size: var(--fs-md);
  font-family: var(--font-display);
  font-weight: 400;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line-on-dark);
}
.audience-panel:last-child .audience-list li { border-bottom-color: var(--line); }
.audience-link {
  margin-top: 2.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--fs-sm);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  position: relative;
}

/* ---- Technical credibility sheet ---- */
.credibility {
  border-top: 1px solid var(--line);
  padding-block: clamp(4rem, 10vw, 7rem);
}
.credibility-head { max-width: 46ch; margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.credibility-head h2 { font-size: var(--fs-lg); color: var(--ink); }

.sheet {
  border: 1px solid var(--line-strong);
  background: var(--paper);
}
.sheet-body {
  padding: clamp(1.75rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
}
@media (min-width: 700px) { .sheet-body { grid-template-columns: repeat(4, 1fr); } }

.sheet-tag {
  background: var(--paper);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.sheet-tag .tag-mark { width: 26px; height: 26px; color: var(--accent); }
.sheet-tag span { font-size: var(--fs-sm); color: var(--ink); }

.sheet-footer {
  border-top: 1px solid var(--line-strong);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  font-size: var(--fs-xs);
  color: var(--concrete);
  letter-spacing: 0.03em;
}
@media (min-width: 700px) { .sheet-footer { grid-template-columns: repeat(4, 1fr); } }
.sheet-footer div {
  padding: 0.9rem 1.25rem;
  border-right: 1px solid var(--line);
}
.sheet-footer div:last-child { border-right: none; }
.sheet-footer strong { display: block; color: var(--charcoal); font-weight: 500; margin-bottom: 0.15rem; }