/* ==========================================================================
   Portfolio page — unique page-specific components.
   ========================================================================== */
.crumb { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); padding-top: 1.5rem; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--white); text-decoration: none; }
.crumb span[aria-current] { color: var(--orange); }
.mt-lg { margin-top: 2rem; }

/* ---- Hero ---- */
.pf-hero { padding-block: clamp(2.5rem, 6vw, 4rem) clamp(2rem, 5vw, 3rem); text-align: center; }
.pf-hero h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); max-width: 20ch; margin-inline: auto; }
.pf-hero__lede { margin-top: 1.25rem; font-size: 1.1rem; color: var(--muted); max-width: 52ch; margin-inline: auto; }

/* ---- Filter bar with sliding pill ---- */
.pf-filters { position: relative; display: inline-flex; gap: 0.25rem; padding: 0.3rem; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); margin-inline: auto; }
.pf-filters__pill { position: absolute; top: 0.3rem; bottom: 0.3rem; left: 0.3rem; border-radius: 999px; background: var(--orange); transition: transform 0.35s cubic-bezier(.16,.84,.44,1), width 0.35s cubic-bezier(.16,.84,.44,1); z-index: 0; }
.pf-filters button { all: unset; position: relative; z-index: 1; cursor: pointer; padding: 0.55rem 1.15rem; font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); border-radius: 999px; transition: color 0.25s ease; white-space: nowrap; }
.pf-filters button.is-active { color: #1A0900; }
.pf-filters-wrap { display: flex; justify-content: center; margin-top: 1.75rem; overflow-x: auto; }

/* ---- Flip-card grid ---- */
.flip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.flip-card { perspective: 1400px; aspect-ratio: 4/3; }
.flip-card__inner { position: relative; width: 100%; height: 100%; transition: transform 0.6s cubic-bezier(.16,.84,.44,1); transform-style: preserve-3d; }
.flip-card:hover .flip-card__inner, .flip-card:focus-within .flip-card__inner { transform: rotateY(180deg); }
.flip-card__face { position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.flip-card__front { background: var(--bg-alt); display: flex; align-items: center; justify-content: center; }
.flip-card__front img { width: 100%; height: 100%; object-fit: cover; }
.flip-card__front--empty { display: flex; align-items: center; justify-content: center; color: var(--muted); font-family: var(--font-mono); font-size: 0.78rem; text-align: center; padding: 1rem; }
.flip-card__back { background: var(--surface-solid); transform: rotateY(180deg); padding: 1.5rem; display: flex; flex-direction: column; justify-content: space-between; }
.flip-card__back-tag { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--orange); }
.flip-card__back h3 { font-size: 1.05rem; margin-top: 0.5rem; }
.flip-card__back p { font-size: 0.85rem; color: var(--muted); margin-top: 0.5rem; }
.flip-card__back-link { font-family: var(--font-mono); font-size: 0.78rem; color: var(--white); }
@media (hover: none) {
  .flip-card__inner { transition: none; }
  .flip-card:hover .flip-card__inner { transform: none; }
  .flip-card__back { position: relative; transform: none; margin-top: 0.75rem; }
  .flip-card { aspect-ratio: auto; }
  .flip-card__front { position: relative; aspect-ratio: 4/3; }
}
@media (max-width: 900px) { .flip-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .flip-grid { grid-template-columns: 1fr; } }
.pf-item[hidden] { display: none; }

/* ---- Case study — sticky image, scrolling narrative ---- */
.case-study { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 5vw, 4rem); }
.case-study--reverse { direction: rtl; }
.case-study--reverse > * { direction: ltr; }
.case-study__sticky { position: sticky; top: 90px; align-self: start; }
.case-study__frame { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border-strong); box-shadow: 0 30px 60px -30px rgba(0,0,0,0.5); }
.case-study__frame img { width: 100%; display: block; }
.case-study__meta { display: flex; gap: 1.5rem; margin-top: 1.25rem; flex-wrap: wrap; }
.case-study__meta div { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.case-study__meta strong { display: block; font-family: var(--font-sans); font-size: 0.95rem; color: var(--white); text-transform: none; letter-spacing: normal; margin-top: 0.3rem; }
.case-study__block { padding-block: 2rem; border-bottom: 1px solid var(--border); }
.case-study__block:first-child { padding-top: 0; }
.case-study__block:last-child { border-bottom: none; padding-bottom: 0; }
.case-study__block span { font-family: var(--font-mono); font-size: 0.75rem; color: var(--orange); text-transform: uppercase; letter-spacing: 0.06em; }
.case-study__block h3 { font-size: 1.3rem; margin-top: 0.5rem; margin-bottom: 0.75rem; }
.case-study__block p { color: var(--muted); font-size: 1rem; line-height: 1.7; }
@media (max-width: 860px) { .case-study, .case-study--reverse { grid-template-columns: 1fr; direction: ltr; } .case-study__sticky { position: relative; top: 0; } }

.other-svc { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.other-svc a { display: block; padding: 1.25rem 1.4rem; border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text); transition: border-color 0.2s ease, transform 0.2s ease; }
.other-svc a:hover { border-color: var(--border-strong); transform: translateY(-3px); text-decoration: none; }
.other-svc strong { display: block; color: var(--white); font-size: 0.98rem; margin-bottom: 0.25rem; }
.other-svc span { font-size: 0.85rem; color: var(--muted); }
@media (max-width: 780px) { .other-svc { grid-template-columns: 1fr; } }