/*
 * work.css
 * ─────────────────────────────────────────────────────────────
 * "My Product Work" section — case study card with collapsible
 * body and a sticky "Collapse" bar at the bottom of the screen.
 *
 * Collapsible behaviour is handled by work.js:
 *   - toggleCase()       opens/closes the case body
 *   - updateStickyBar()  shows/hides the sticky bar on scroll
 *
 * When the case is open and the user has scrolled past the
 * card header, the sticky bar slides up from the bottom so
 * the user can always collapse without scrolling back up.
 * ─────────────────────────────────────────────────────────────
 */

#work {
  background: var(--white);
  border-top: 1px solid var(--silver);
}

/* ── Case study card ── */
.case-study {
  background: var(--off-white);
  margin-top: 3rem;
  border: 1px solid var(--silver);
  border-radius: 6px;
  overflow: hidden;
}

/* ── Card header (always visible) ── */
.case-head {
  padding: 2.5rem 2.5rem 2rem;
  border-bottom: 1px solid var(--silver);
}

.case-eyebrow {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 0.6rem;
}
.case-num {
  font-family: 'DM Mono', monospace;
  font-size: 0.63rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
}
.case-co {
  font-family: 'DM Mono', monospace;
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate);
}

.case-head-main { margin-bottom: 0.25rem; }

.case-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 900;
  color: var(--ink);
  line-height: 1.15;
}
.case-title em { font-style: italic; color: var(--blue); }

.case-tagline {
  font-size: 0.95rem;
  color: var(--slate);
  font-weight: 300;
  line-height: 1.65;
  max-width: 600px;
  margin-top: 0.6rem;
}

/* ── At-a-Glance strip ── */
.glance-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 1.75rem;
  border-top: 1px solid var(--silver);
  padding-top: 1.5rem;
}
.glance-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding-right: 1.25rem;
}
.glance-icon { flex-shrink: 0; color: var(--blue); margin-top: 0.1rem; }
.glance-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.3rem;
}
.glance-value {
  font-size: 0.8rem;
  color: var(--ink);
  line-height: 1.5;
  font-weight: 400;
}
.glance-divider {
  width: 1px;
  background: var(--silver);
  margin: 0 0.25rem;
  align-self: stretch;
}

/* ── Expand CTA (centred at bottom of card header) ── */
.case-expand-cta {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--silver);
}

/* The toggle makes the whole header clickable */
.case-toggle { cursor: pointer; user-select: none; transition: background 0.2s; }
.case-toggle:hover { background: var(--white); }

/* Pill-shaped expand/collapse button */
.case-chevron {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--blue);
  transition: all 0.3s;
  background: var(--off-white);
  border: 1px solid var(--silver);
  border-radius: 2rem;
  padding: 0.5rem 1.25rem;
}
.case-toggle:hover .case-chevron {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.chevron-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}
.case-chevron svg { transition: transform 0.4s ease; }
.case-chevron.open svg { transform: rotate(180deg); }

/* ── Collapsible body ── */
.case-body { padding: 0 2.5rem 2.5rem; }

.case-collapsible {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.5s ease;
}
.case-collapsible.open {
  max-height: 3000px;
  opacity: 1;
  padding-bottom: 2.5rem;
}

/* Section labels within the case body */
.case-slabel {
  font-family: 'DM Mono', monospace;
  font-size: 0.63rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin: 2rem 0 1rem;
}

/* Background context card */
.case-context {
  background: var(--white);
  border-left: 3px solid var(--blue);
  border-radius: 0 4px 4px 0;
  padding: 1.25rem 1.4rem;
}
.case-context p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--slate);
  font-weight: 300;
}
.case-context p strong { color: var(--ink); font-weight: 600; }

.case-persona-note {
  font-size: 0.78rem;
  color: var(--slate-light);
  font-style: italic;
  margin-bottom: 0.75rem;
  display: block;
  font-weight: 300;
}

/* Reflection card */
.case-reflection {
  background: var(--off-white);
  border: 1px solid var(--silver);
  border-radius: 4px;
  padding: 1.4rem;
  margin-top: 0.5rem;
}
.case-reflection p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--slate);
  font-weight: 300;
}

/* Personas */
.persona-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--silver);
}
.persona { background: var(--white); padding: 1.4rem; }
.persona-role {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.65rem;
}
.persona p {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--slate);
  font-style: italic;
  font-weight: 300;
}

/* Approach grid (5 steps, 2-col, last step spans full width) */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--silver);
}
.approach-item {
  background: var(--white);
  padding: 1.4rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.approach-n {
  font-family: 'Playfair Display', serif;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--blue);
  line-height: 1;
  flex-shrink: 0;
  width: 1.8rem;
  text-align: center;
}
.approach-body {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--slate);
  font-weight: 300;
}
.approach-body strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: 0.25rem;
}

/* Solution columns */
.sol-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.sol-col {
  background: var(--white);
  padding: 1.4rem;
  border-left: 3px solid var(--blue);
  border-radius: 0 4px 4px 0;
}
.sol-col-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.85rem;
}
.sol-list { list-style: none; }
.sol-list li {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--slate);
  font-weight: 300;
  padding: 0.45rem 0 0.45rem 1.2rem;
  border-bottom: 1px solid var(--silver);
  position: relative;
}
.sol-list li::before { content: '→'; position: absolute; left: 0; color: var(--blue); }

/* Outcomes grid */
.outcomes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--silver-dark);
  margin-top: 2rem;
  border-radius: 4px;
  overflow: hidden;
}
.outcome {
  background: var(--ink);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
}
.outcome-text {
  font-size: 0.8rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 300;
}
.outcome-svg {
  color: var(--blue-light);
  flex-shrink: 0;
  margin-bottom: 0.75rem;
  display: block;
}

/* ── Sticky collapse bar ──
   Slides up from bottom when the case is open and the header
   has scrolled out of view. Controlled by work.js. */
.sticky-collapse {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 200;
  background: var(--ink);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.sticky-collapse.visible {
  transform: translateY(0);
  pointer-events: all;
}
.sticky-collapse-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}
.sticky-collapse-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--white);
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem 1.1rem;
  border-radius: 2rem;
  cursor: pointer;
  transition: background 0.2s;
}
.sticky-collapse-btn:hover { background: rgba(255, 255, 255, 0.15); }
.sticky-collapse-btn svg { transition: transform 0.3s ease; transform: rotate(180deg); }