/* ==========================================================================
   PI page. Loaded only by pages/pi.html (via `extra_css` in its front matter),
   so nothing here can affect another page.

   Shares the team page's vocabulary - warm neutrals, a system serif for names,
   small uppercase labels for section headings - so the two read as one site
   without either importing the other's stylesheet.
   ========================================================================== */

.pi {
  --ink:    #22201d;
  --body:   #403b35;
  --muted:  #7d746a;
  --rule:   #e4ded5;
  --accent: #8a3b2f;
  --serif:  Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;

  --measure: 66ch;   /* ~66 characters: comfortable for continuous prose */

  color: var(--body);
  font-size: 16px;
  line-height: 1.68;
}

/* This page supplies its own heading block. */
.page-header { display: none; }

/* Wide enough for a portrait beside text, narrow enough that the prose below
   does not run past a readable measure. */
.container-wide { max-width: min(880px, 88vw); }

.pi *, .pi *::before, .pi *::after { box-sizing: border-box; }
.pi img { display: block; max-width: 100%; height: auto; }
.pi p { max-width: var(--measure); }

.pi a { color: #08c; }
.pi a:focus-visible,
.pi .pi-links a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* --- name and title ------------------------------------------------------- */
.pi-head { margin: clamp(6px, 2vw, 18px) 0 clamp(26px, 4vw, 40px); }

.pi-head h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 4.6vw, 42px);
  font-weight: normal;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 12px;
}

.pi-title {
  font-size: 15px;
  line-height: 1.55;
  color: var(--body);
  margin: 0;
  max-width: 58ch;
}
.pi-title .role { color: var(--ink); }
.pi-title .affil { color: var(--muted); }
.pi-title a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--rule); }
.pi-title a:hover { color: var(--accent); border-bottom-color: currentColor; }

/* --- link row ------------------------------------------------------------- */
.pi-links {
  margin: 16px 0 0;
  font-size: 13.5px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 10px;
}
.pi-links a { color: var(--body); text-decoration: none; border-bottom: 1px solid var(--rule); }
.pi-links a:hover { color: var(--accent); border-bottom-color: currentColor; }
.pi-links .sep { color: #c9c1b6; }

/* --- portrait beside the opening prose ------------------------------------ */
.pi-intro {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--rule);
}

.pi-portrait { margin: 0; }
.pi-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 2px;
}

.pi-intro p { margin: 0 0 1.05em; max-width: none; }
.pi-intro p:last-child { margin-bottom: 0; }

/* --- sections ------------------------------------------------------------- */
.pi-section { margin-top: clamp(38px, 6vw, 66px); }

.pi-section h2 {
  font-family: inherit;
  font-size: 12px;
  font-weight: bold;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.pi-section p { margin: 0 0 1.05em; }
.pi-section p:last-child { margin-bottom: 0; }

/* Reserved. The "How I think about research" and "Current interests" sections
   are held back pending a rewrite; these rules stay so restoring the markup is
   all that is needed. Recover the prose with:
       git show 5d4c12d:pages/pi.html
   A thin rule and some air, rather than quotation marks or display type. */
.pi-questions {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0;
  padding: 0 0 0 clamp(16px, 2.4vw, 24px);
  border-left: 2px solid var(--rule);
  max-width: var(--measure);
}
.pi-questions li {
  font-family: var(--serif);
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.45;
  color: var(--ink);
}
.pi-questions li + li { margin-top: clamp(12px, 1.6vw, 16px); }

.pi-note { font-size: 14.5px; color: var(--muted); }
.pi-note a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.pi-note a:hover { color: var(--accent); }

/* ==========================================================================
   Responsive
   ========================================================================== */

/* Two columns only while the text column stays a readable width. Below this
   the portrait would squeeze it to about forty characters, so stack instead. */
@media (max-width: 900px) {
  .pi-intro {
    grid-template-columns: 1fr;
    gap: clamp(20px, 4vw, 28px);
    justify-items: center;
    text-align: left;
  }
  .pi-portrait { width: min(46%, 300px); }
  .pi-intro-text { width: 100%; }
  /* Stacked, the opening prose needs the same measure as the rest. */
  .pi-intro p { max-width: var(--measure); }
}

@media (max-width: 600px) {
  .pi { font-size: 15.5px; }
  .pi-head h1 { font-size: clamp(27px, 8vw, 34px); }
  /* The container is 88vw, so 68% of it is ~60% of the screen - large enough
     to be a portrait, small enough that the first screen is not mostly image. */
  .pi-portrait { width: 68%; }
}

@media (max-width: 380px) {
  .pi-portrait { width: 72%; }
  .pi-links { font-size: 13px; gap: 2px 8px; }
}