/* =========================================================
   Case study pages — layout on top of style.css tokens
   ========================================================= */

.case-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 16px clamp(16px, 4vw, 44px);
  padding-top: max(16px, env(safe-area-inset-top));
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.case-nav__back {
  display: inline-flex; align-items: center; gap: 8px; color: var(--text-muted);
  font-size: 0.92rem; transition: color 0.25s, gap 0.3s var(--ease); min-width: 0;
}
.case-nav__back:hover { color: var(--text); gap: 12px; }
.case-nav__back span, .case-nav__back {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.case-nav__actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.case {
  max-width: 860px; margin: 0 auto; width: 100%;
  padding: clamp(100px, 14vw, 150px) clamp(16px, 4vw, 24px) 40px;
  padding-bottom: max(40px, env(safe-area-inset-bottom));
}

.case__eyebrow { font-family: var(--font-mono); font-size: 0.82rem; color: var(--accent); }
.case__title {
  font-size: clamp(1.85rem, 0.5rem + 6vw, 4rem); font-weight: 600; letter-spacing: -0.03em;
  line-height: 1.08; margin: 14px 0 18px; overflow-wrap: break-word;
}
.case__summary { font-size: clamp(1.02rem, 2.6vw, 1.4rem); color: var(--text-muted); max-width: 60ch; }

.case__meta {
  display: flex; flex-wrap: wrap; gap: 14px 40px; margin: 34px 0 8px;
  padding: 24px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.case__meta-item { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.case__meta-label { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); }
.case__meta-value { font-size: 0.95rem; color: var(--text); overflow-wrap: break-word; }

.case__links { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 10px; }
.case__links .btn { max-width: 100%; }

.case__section { margin-top: clamp(44px, 7vw, 72px); min-width: 0; }
.case__section > h2 {
  font-family: var(--font-mono); font-size: 0.9rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.case__section > h2::before { content: ""; width: 22px; height: 1px; background: var(--accent); flex-shrink: 0; }
.case__section h3 { font-size: clamp(1.05rem, 2.5vw, 1.15rem); font-weight: 600; margin: 26px 0 10px; overflow-wrap: break-word; }
.case__section p { color: var(--text-muted); margin-bottom: 16px; overflow-wrap: break-word; }
.case__section p strong, .case__section li strong { color: var(--text); font-weight: 600; }
.case__section ul { list-style: none; display: flex; flex-direction: column; gap: 12px; margin: 4px 0 18px; }
.case__section ul li { position: relative; padding-left: 24px; color: var(--text-muted); overflow-wrap: break-word; }
.case__section ul li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }

.case__lead { font-size: clamp(1.05rem, 2.5vw, 1.2rem); color: var(--text); font-weight: 500; letter-spacing: -0.01em; }

/* architecture diagram */
.case__diagram {
  margin: 8px 0 6px; padding: clamp(16px, 4vw, 36px); border: 1px solid var(--border);
  border-radius: var(--radius); background: linear-gradient(160deg, var(--bg-card), var(--bg-soft));
  overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.case__diagram svg {
  display: block; margin: 0 auto; width: 100%; height: auto; max-width: 760px;
  min-width: min(100%, 520px);
}
.case__diagram-cap { text-align: center; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); margin-top: 14px; }

/* screenshots / figures */
.case__shot {
  margin: 22px 0 28px; padding: 0; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-card); overflow: hidden;
}
.case__shot img {
  display: block; width: 100%; height: auto;
  border-bottom: 1px solid var(--border);
}
.case__shot figcaption {
  padding: 14px 16px 16px; font-size: 0.88rem; line-height: 1.55;
  color: var(--text-muted); overflow-wrap: break-word;
}
.case__shot figcaption strong {
  display: block; font-family: var(--font-mono); font-size: 0.78rem;
  font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 6px;
}

/* diagram primitives */
.dg-box { fill: var(--surface); stroke: var(--border-strong); stroke-width: 1.2; rx: 10; }
.dg-box--accent { fill: var(--accent-soft); stroke: var(--accent); }
.dg-label { fill: var(--text); font-family: var(--font-mono); font-size: 13px; font-weight: 500; }
.dg-sub { fill: var(--text-dim); font-family: var(--font-mono); font-size: 10.5px; }
.dg-flow { stroke: var(--accent); stroke-width: 1.6; fill: none; marker-end: url(#arrow); }
.dg-flow--dim { stroke: var(--text-dim); stroke-dasharray: 5 5; marker-end: url(#arrowdim); }
.dg-flow-label { fill: var(--text-muted); font-family: var(--font-mono); font-size: 10px; }

/* results */
.case__results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 6px; }
.case__result { padding: clamp(18px, 3vw, 24px); border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-card); min-width: 0; }
.case__result-num {
  display: block; font-family: var(--font-mono); font-size: clamp(1.3rem, 4vw, 2.1rem);
  font-weight: 700; color: var(--accent); letter-spacing: -0.02em; overflow-wrap: anywhere;
}
.case__result-label { font-size: 0.85rem; color: var(--text-dim); margin-top: 8px; display: block; }

.case__stack { display: flex; flex-wrap: wrap; gap: 9px; }
.case__stack span { font-family: var(--font-mono); font-size: 0.78rem; padding: 6px 13px; border: 1px solid var(--border-strong); border-radius: 100px; color: var(--text-muted); }

.case__cta {
  margin-top: clamp(44px, 7vw, 72px); padding-top: 40px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
}
.case__cta p { color: var(--text-muted); margin: 0; flex: 1 1 100%; }
.case__cta .btn { max-width: 100%; }

@media (max-width: 720px) {
  .case__results { grid-template-columns: 1fr; }
  .case-nav__actions .nav__resume { display: none; }
  .case__links .btn { flex: 1 1 auto; min-width: min(100%, 12rem); }
}

@media (max-width: 420px) {
  .case__cta .btn { width: 100%; }
  .case__diagram svg { min-width: 480px; }
}

@media (max-height: 560px) and (orientation: landscape) {
  .case { padding-top: 88px; }
}