/* ============================================================
   Project page styles — academic density, figure-first.
   Extends styles.css. Body sets data-project to one of:
     bioinspired | lpbf | digital-twin | sustainable
   ============================================================ */

:root {
  --proj-accent: var(--accent);
  --proj-accent-soft: color-mix(in srgb, var(--accent) 18%, transparent);
  --proj-accent-ring: color-mix(in srgb, var(--accent) 36%, transparent);
}

body[data-project="bioinspired"]  { --proj-accent: #3fc6b3; --proj-accent-soft: color-mix(in srgb, #3fc6b3 18%, transparent); --proj-accent-ring: color-mix(in srgb, #3fc6b3 36%, transparent); }
body[data-project="lpbf"]         { --proj-accent: #f3b35a; --proj-accent-soft: color-mix(in srgb, #f3b35a 18%, transparent); --proj-accent-ring: color-mix(in srgb, #f3b35a 36%, transparent); }
body[data-project="digital-twin"] { --proj-accent: #9b8cff; --proj-accent-soft: color-mix(in srgb, #9b8cff 18%, transparent); --proj-accent-ring: color-mix(in srgb, #9b8cff 36%, transparent); }
body[data-project="sustainable"]  { --proj-accent: #ef6f6c; --proj-accent-soft: color-mix(in srgb, #ef6f6c 18%, transparent); --proj-accent-ring: color-mix(in srgb, #ef6f6c 36%, transparent); }

/* Tighter container for project pages — more reading-focused */
.proj-container {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

/* ───────── Reading progress ───────── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 20;
  background: transparent;
}
.reading-progress__bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--proj-accent), var(--accent-2));
  transition: width 80ms linear;
}

/* ───────── Compact breadcrumb nav ───────── */
.proj-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  border-bottom: 1px solid var(--line);
}
.proj-nav__inner {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.proj-nav__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  transition: color 160ms ease, border-color 160ms ease;
}
.proj-nav__back:hover { color: var(--text); border-color: var(--proj-accent-ring); }
.proj-nav__crumb { display: inline-flex; align-items: center; gap: 10px; min-width: 0; }
.proj-nav__chip {
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--proj-accent-soft);
  color: var(--proj-accent);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  white-space: nowrap;
}
.proj-nav__sep { color: var(--dim); font-family: var(--mono); font-size: 0.8rem; }
.proj-nav__title {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 44vw;
}

/* ───────── HERO / Above the fold ─────────
   2-column on desktop: copy (left) + graphic (right).
   Stacks on mobile. */
.proj-hero {
  padding: clamp(32px, 5vw, 56px) 0 clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.proj-hero__copy { min-width: 0; }

.proj-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 11px;
  border: 1px solid var(--proj-accent-ring);
  border-radius: 999px;
  background: var(--proj-accent-soft);
  color: var(--proj-accent);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}
.proj-hero__tag::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--proj-accent);
}

.proj-hero__title {
  margin: 14px 0 10px;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.005em;
  font-weight: 600;
  max-width: 22ch;
}
.proj-hero__title em {
  font-style: normal;
  color: var(--proj-accent);
}

.proj-hero__pitch {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
  font-size: clamp(0.96rem, 1.4vw, 1.04rem);
  line-height: 1.55;
}
.proj-hero__pitch strong { color: var(--text); font-weight: 600; }

/* Tools / methods inline strip */
.proj-hero__stack {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.proj-hero__stack li {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.74rem;
}

/* Inline metrics row (horizontal compact) */
.proj-hero__metrics {
  list-style: none;
  margin: 20px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.proj-hero__metrics div { min-width: 0; }
.proj-hero__metrics dt {
  margin: 0 0 4px;
  color: var(--dim);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.proj-hero__metrics dd {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  line-height: 1.1;
  color: var(--text);
  font-weight: 600;
}
.proj-hero__metrics dd small {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.7em;
  color: var(--muted);
  letter-spacing: 0;
  margin-left: 2px;
}
.proj-hero__metrics dd sup {
  font-size: 0.6em;
  color: var(--proj-accent);
}

/* Status line (venue, year, pill) */
.proj-hero__status {
  margin: 14px 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.74rem;
}
.proj-hero__status em { color: var(--text); font-style: italic; }
.proj-hero__status .pill {
  padding: 2px 8px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.proj-hero__status .pill--published { background: color-mix(in srgb, #3fc6b3 16%, transparent); color: #3fc6b3; }
.proj-hero__status .pill--review    { background: color-mix(in srgb, #f3b35a 16%, transparent); color: #f3b35a; }
.proj-hero__status .pill--prep      { background: color-mix(in srgb, #9b8cff 16%, transparent); color: #9b8cff; }

/* Hero graphic */
.proj-hero__graphic {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
}
.proj-hero__graphic img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: contain;
  background: #fff;
}
.proj-hero__graphic figcaption {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  padding: 8px 14px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.65));
  color: rgba(255,255,255,0.92);
  font-size: 0.74rem;
  line-height: 1.35;
}

/* ───────── Sections ───────── */
.proj-section {
  padding: clamp(28px, 4vw, 44px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 72px;
}
.proj-section:first-of-type { border-top: 0; padding-top: clamp(14px, 2vw, 22px); }

.proj-section h2 {
  margin: 0 0 16px;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--sans);
  font-size: clamp(0.78rem, 1vw, 0.86rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.proj-section h2::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--proj-accent);
  display: inline-block;
  flex: 0 0 24px;
}

.proj-section p {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.65;
  max-width: 70ch;
}
.proj-section p:last-child { margin-bottom: 0; }
.proj-section strong { color: var(--text); font-weight: 700; }
.proj-section em { color: var(--proj-accent); font-style: normal; font-weight: 600; }

/* Highlight word/term */
.proj-section .kw {
  display: inline-block;
  padding: 0 5px;
  border-radius: 3px;
  background: var(--proj-accent-soft);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.88em;
  font-weight: 600;
}

/* Two-column "method" layout: bullets + figure side by side */
.proj-method {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

.proj-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.proj-list li {
  position: relative;
  padding: 10px 12px 10px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--proj-accent);
  border-radius: 4px;
  background: var(--panel);
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}
.proj-list li strong { color: var(--text); font-weight: 700; }
.proj-list li code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--bg-soft) 70%, transparent);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.86em;
  color: var(--text);
}

/* Equation / formula block */
.proj-eq {
  margin: 14px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: color-mix(in srgb, var(--bg-soft) 85%, transparent);
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--text);
  overflow-x: auto;
}
.proj-eq__label {
  display: block;
  margin-bottom: 4px;
  color: var(--proj-accent);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}

/* Inline figure (used within method/results sections) */
.proj-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  cursor: zoom-in;
  transition: border-color 160ms ease, transform 160ms ease;
}
.proj-figure:hover { border-color: var(--proj-accent-ring); transform: translateY(-1px); }
.proj-figure__media {
  display: block;
  width: 100%;
  max-height: 360px;
  object-fit: contain;
  background: #fff;
  padding: 8px;
}
.proj-figure figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  background: var(--panel-strong);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.45;
}
.proj-figure figcaption b {
  color: var(--proj-accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-right: 5px;
}

/* Results grid — compact stat cards */
.proj-results-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 18px;
}
.proj-stat {
  padding: 14px 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  border-bottom: 2px solid var(--proj-accent);
}
.proj-stat strong {
  display: block;
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.05;
  font-weight: 600;
  color: var(--text);
}
.proj-stat strong sup { font-size: 0.55em; color: var(--proj-accent); }
.proj-stat strong small { font-family: var(--mono); font-size: 0.6em; font-weight: 500; color: var(--muted); margin-left: 2px; }
.proj-stat span {
  display: block;
  margin: 4px 0 6px;
  color: var(--dim);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.proj-stat em {
  display: block;
  color: var(--muted);
  font-style: normal;
  font-size: 0.82rem;
  line-height: 1.45;
  font-weight: 400;
}

/* Results figure gallery */
.proj-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 14px 0 12px;
}
.proj-gallery .proj-figure { cursor: zoom-in; }
.proj-gallery .proj-figure__media { max-height: 220px; }
.proj-gallery .proj-figure--wide { grid-column: span 2; }
.proj-gallery .proj-figure--wide .proj-figure__media { max-height: 280px; }
.proj-gallery .proj-figure--full { grid-column: 1 / -1; }
.proj-gallery .proj-figure--full .proj-figure__media { max-height: 360px; }

/* Methodology figure column can have multiple stacked figures */
.proj-method__figs { display: grid; gap: 10px; min-width: 0; }
.proj-method__figs .proj-figure__media { max-height: 280px; }

/* Impact closing line */
.proj-impact {
  margin: 8px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--proj-accent-ring);
  border-radius: var(--radius);
  background: var(--proj-accent-soft);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.55;
}
.proj-impact strong { color: var(--proj-accent); font-weight: 700; }

/* ───────── Lightbox ───────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(8, 8, 10, 0.88);
  backdrop-filter: blur(14px);
}
.lightbox.is-open { display: flex; }
.lightbox__inner {
  max-width: min(1200px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lightbox__img {
  max-width: 100%;
  max-height: 82vh;
  border-radius: var(--radius);
  background: #fff;
  padding: 14px;
}
.lightbox__caption {
  color: var(--text);
  font-size: 0.9rem;
  text-align: center;
  max-width: 70ch;
  margin: 0 auto;
}
.lightbox__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

/* ───────── Resources / Citation ───────── */
.proj-resources {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 14px;
}
.proj-resource {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 160ms ease;
}
.proj-resource:hover { border-color: var(--proj-accent-ring); }
.proj-resource > i:first-child {
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: var(--proj-accent-soft);
  color: var(--proj-accent);
  font-size: 0.92rem;
}
.proj-resource span {
  display: block;
  color: var(--dim);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.proj-resource strong {
  display: block;
  margin-top: 2px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.82rem;
  overflow-wrap: anywhere;
  font-weight: 600;
}
.proj-resource__go { color: var(--dim); font-size: 0.78rem; }

.proj-citation {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  overflow: hidden;
}
.proj-citation__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-strong);
}
.proj-citation__head span {
  color: var(--proj-accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.proj-citation__copy {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  cursor: pointer;
}
.proj-citation__copy:hover { color: var(--text); border-color: var(--proj-accent-ring); }
.proj-citation__copy.is-copied { color: var(--proj-accent); border-color: var(--proj-accent-ring); background: var(--proj-accent-soft); }
.proj-citation pre {
  margin: 0;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* Skills — small inline strip at bottom of resources section */
.proj-chips-inline {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.proj-chips-inline li {
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
}
.proj-chips-inline li:hover {
  color: var(--text);
  border-color: var(--proj-accent-ring);
}
.proj-chips-inline__label {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  margin-right: 4px;
  align-self: center;
}

/* ───────── Footer nav ───────── */
.proj-footernav {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: stretch;
  gap: 10px;
  margin: clamp(32px, 5vw, 48px) auto 28px;
}
.proj-footernav__back,
.proj-footernav__prev,
.proj-footernav__next {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 160ms ease, transform 160ms ease;
}
.proj-footernav__back:hover,
.proj-footernav__prev:hover,
.proj-footernav__next:hover {
  border-color: var(--proj-accent-ring);
  transform: translateY(-1px);
}
.proj-footernav__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
}
.proj-footernav__back:hover { color: var(--text); }
.proj-footernav__siblings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.proj-footernav__prev,
.proj-footernav__next {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  padding: 12px 16px;
  min-height: 60px;
}
.proj-footernav__next { text-align: right; }
.proj-footernav__prev span,
.proj-footernav__next span {
  color: var(--proj-accent);
  font-family: var(--mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.proj-footernav__prev strong,
.proj-footernav__next strong {
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
}

/* ───────── Homepage card affordance ───────── */
.project__view {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 12px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  transition: gap 200ms ease;
}
.project__view:hover { gap: 13px; }
.project__view i { font-size: 0.72rem; }
.project--link {
  cursor: pointer;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}
.project--link:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.14);
}

/* ───────── Responsive ───────── */
@media (max-width: 960px) {
  .proj-hero,
  .proj-method {
    grid-template-columns: 1fr;
  }
  .proj-hero__metrics,
  .proj-results-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .proj-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .proj-gallery .proj-figure--wide { grid-column: span 2; }
}

@media (max-width: 600px) {
  .proj-hero__metrics,
  .proj-results-grid,
  .proj-resources {
    grid-template-columns: 1fr;
  }
  .proj-gallery {
    grid-template-columns: 1fr;
  }
  .proj-gallery .proj-figure--wide { grid-column: 1; }
  .proj-footernav { grid-template-columns: 1fr; }
  .proj-footernav__siblings { grid-template-columns: 1fr; }
  .proj-nav__title { display: none; }
}