/* ==========================================================================
   Yiklam Studio — Case Study stylesheet
   Shared layout for project case-study pages (the "PROVE" layer).

   Usage: copy this file into each project folder as `style.css`, then link
   both css/global.css (design system) and this file from the case's index.html:

       <link rel="stylesheet" href="../../css/global.css">
       <link rel="stylesheet" href="style.css">

   Structure of a case page:
       <header class="site-nav">…</header>
       <main class="case">
         <a class="case-back">← Back to Projects</a>
         <section class="case-hero">…</section>
         <section class="case-section">…</section>   (Purpose / Process / Outcome / Deliverables)
       </main>
       <footer class="site-footer">…</footer>

   All colours & type come from global.css custom properties.
   ========================================================================== */

/* ---------- Case body ---------- */
.case {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 32px 80px;
}

.case-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  margin: 24px 0 8px;
  transition: opacity 0.2s;
}
.case-back:hover {
  opacity: 0.7;
}

/* ---------- Hero ---------- */
.case-hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.case-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.case-number {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 1px;
}

.case-category {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.case-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 16px;
}

.case-tagline {
  font-size: 19px;
  line-height: 1.5;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 24px;
}

.case-hero-img {
  margin: 24px 0 8px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.case-hero-img img {
  width: 100%;
  display: block;
}

.case-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* ---------- Sections ---------- */
.case-section {
  padding: 44px 0 8px;
}

.case-section + .case-section {
  border-top: 1px solid var(--border);
  margin-top: 12px;
}

.case-section-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.case-section h2 {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--text);
  margin-bottom: 12px;
}

.case-section-lead {
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 20px;
}

.case-section p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 720px;
}

/* ---------- Two-column grid / cards ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
}

.case-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.case-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- Numbered steps (Process / Development / Implementation) ---------- */
.case-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 20px 0;
}

.case-step {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.case-step:last-child {
  border-bottom: none;
}

.case-step-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  padding-top: 2px;
}

.case-step h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.case-step p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- Role cards (multi-role product value) ---------- */
.case-roles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}

.case-role {
  background: var(--surface-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}

.case-role-name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.case-role p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.case-concept {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--accent2);
  margin-bottom: 14px;
}

/* ---------- Tags / deliverables ---------- */
.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.case-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--tag-bg);
  color: var(--text);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.case-deliverables {
  list-style: none;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.case-deliverables li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
}

.case-deliverables li::before {
  content: '→';
  font-family: var(--font-mono);
  color: var(--accent);
  flex-shrink: 0;
}

.case-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted2);
  background: var(--surface-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 16px 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .case {
    padding: 16px 20px 64px;
  }
  .case-grid {
    grid-template-columns: 1fr;
  }
  .case-roles {
    grid-template-columns: 1fr;
  }
  .case-step {
    grid-template-columns: 34px 1fr;
    gap: 12px;
  }
}

/* ---------- Community Commerce — photo wall (real archive 2016–2018) ---------- */
.case-photo-wall {
  margin: 20px 0 8px;
}
.case-photo-wall-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted2);
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.case-photo-scroll {
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  gap: 10px;
  padding-bottom: 8px;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}
.case-photo-scroll img {
  height: 160px;
  width: auto;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.case-photo-hint {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted2);
  margin-top: 8px;
  letter-spacing: 1px;
}
.case-photo-scroll::-webkit-scrollbar {
  height: 6px;
}
.case-photo-scroll::-webkit-scrollbar-thumb {
  background: var(--accent2);
  border-radius: 10px;
}
@media (max-width: 720px) {
  .case-photo-scroll img { height: 120px; }
}

/* ---------- Reflection (full-width, centred) ---------- */
.case-reflection {
  text-align: center;
  padding: 40px 0;
}
.case-reflection .reflection-lines {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 500;
  line-height: 1.3;
  color: var(--text);
  margin: 20px 0;
}