/* ==========================================================================
   Enzo Peres Afonso: site styles
   A plain, text-first academic layout over the starfield.
   ========================================================================== */

:root {
  --bg: #05060a;
  --text: #d8dce3;
  --text-strong: #f2f4f7;
  --muted: #9199a8;
  --link: #8cc4ff;
  --link-hover: #bfdcff;
  --line: rgba(255, 255, 255, 0.12);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.65;
}

img { max-width: 100%; height: auto; }

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 2px; }

:focus-visible { outline: 2px solid var(--link); outline-offset: 2px; }

h1, h2 {
  color: var(--text-strong);
  font-weight: 600;
  line-height: 1.3;
}
h1 { font-size: 1.15rem; margin: 0 0 1rem; }
h2 {
  font-size: 1rem;
  margin: 2.5rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

p { margin: 0 0 1rem; }
strong { color: var(--text-strong); font-weight: 600; }
.muted { color: var(--muted); }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  padding: 0.4rem 0.8rem;
  background: var(--link);
  color: var(--bg);
}
.skip-link:focus { top: 1rem; }

#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* ---------- Layout ---------- */

.page {
  display: grid;
  grid-template-columns: 200px minmax(0, 720px);
  gap: 4rem;
  max-width: 1040px;
  margin: 0 auto;
  padding: 3.5rem 2rem 2rem;
}

/* ---------- Sidebar ---------- */

.sidebar {
  position: sticky;
  top: 3.5rem;
  align-self: start;
}

.sb-name {
  margin: 0 0 0.35rem;
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.3;
}
.sb-name a { color: var(--text-strong); }
.sb-name a:hover { text-decoration: none; color: var(--text-strong); }
.sb-position {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

.sb-photo {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 30% 30%;      /* keep the face in frame when cropped */
  margin: 1.25rem 0 1.5rem;
  border: 1px solid var(--line);
}

.sb-nav {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}
.sb-nav li { margin: 0.2rem 0; }
.sb-nav a[aria-current="page"] {
  color: var(--text-strong);
  font-weight: 600;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.social-links a { color: var(--muted); display: block; }
.social-links a:hover { color: var(--text-strong); }
.icon { display: block; width: 17px; height: 17px; }

/* ---------- Content ---------- */

.content { min-width: 0; }

.prose p, .prose ul { margin: 0 0 1rem; }

.bullets {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}
.bullets li { margin: 0.25rem 0; }

.news {
  list-style: none;
  margin: 0;
  padding: 0;
}
.news li { margin: 0 0 0.85rem; }
.news-date {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  margin-right: 0.5rem;
}
.news-date::after { content: ":"; }

.toc { color: var(--muted); }

.refs {
  margin: 0;
  padding-left: 1.25rem;
}
.refs li { margin: 0 0 0.85rem; padding-left: 0.25rem; }

/* A project, model or outreach item with an optional thumbnail on the right. */
.entry {
  display: flow-root;
  margin: 0 0 1.75rem;
  scroll-margin-top: 1.5rem;
}
.entry > :last-child { margin-bottom: 0; }
.entry p { margin-bottom: 0.5rem; }
.entry-title { margin-bottom: 0.25rem; }
.entry-meta { font-size: 0.9rem; }
.entry:target .entry-title strong { color: var(--link-hover); }

.entry-thumb {
  float: right;
  width: 150px;
  margin: 0.3rem 0 0.75rem 1.5rem;
}
.entry-thumb--wide { width: 220px; }
.entry-thumb.entry-thumb--logo img { border: 0; background: none; }
.entry-thumb img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
}

/* Project write-up pages (projects/*.html). */
.crumb { color: var(--muted); font-size: 0.85rem; margin-bottom: 0.75rem; }

.figure { margin: 1.5rem 0 2rem; }
.figure img, .figure video {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
  border: 1px solid var(--line);
}
.figure figcaption, .views figcaption {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

.table-wrap { overflow-x: auto; margin: 0 0 1.25rem; }
.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.data th, .data td {
  padding: 0.4rem 1rem 0.4rem 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.data th { color: var(--muted); font-weight: 600; }
.data td:first-child { white-space: nowrap; color: var(--muted); }

.views {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem 0.75rem;
  margin: 1rem 0 1.5rem;
}
.views figure { margin: 0; }
.views img { display: block; width: 100%; height: auto; border: 1px solid var(--line); }

@media (max-width: 560px) {
  .views { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.code {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  font: 0.82rem/1.55 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color: var(--text);
}

/* Inline 3D model on project pages, with an optional switch between versions. */
.model-frame {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  max-height: 75vh;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 50% 40%, #1a1d27, #07080d 75%);
  --poster-color: transparent;
}
.model-switch { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.6rem; }
.model-switch button {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
}
.model-switch button:hover { color: var(--text-strong); border-color: rgba(255, 255, 255, 0.3); }
.model-switch button[aria-pressed="true"] { color: var(--text-strong); border-color: var(--link); }

/* Interactive 3D model viewer (models.html). */
.viewer { margin-top: 0.5rem; }
.viewer[open] { clear: both; }
.viewer summary {
  display: inline-block;
  color: var(--link);
  font-size: 0.9rem;
  cursor: pointer;
  list-style: none;
}
.viewer summary::-webkit-details-marker { display: none; }
.viewer summary::before { content: "▸ "; }
.viewer[open] summary::before { content: "▾ "; }
.viewer summary:hover { color: var(--link-hover); text-decoration: underline; text-underline-offset: 2px; }
.viewer model-viewer {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  max-height: 70vh;
  margin-top: 0.75rem;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 50% 40%, #1a1d27, #07080d 75%);
  --poster-color: transparent;
}
.viewer-hint { color: var(--muted); font-size: 0.8rem; margin: 0.4rem 0 0; }

.thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.5rem;
}
.thumbs img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--line);
  transition: opacity 0.2s;
}
.thumbs a:hover img { opacity: 0.8; }

/* ---------- Footer ---------- */

.site-footer {
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}
.site-footer p { margin: 0; }
.site-footer span { text-decoration: underline dotted; text-underline-offset: 3px; }

/* ---------- Starfield telescope speech bubble ---------- */

.telescope-bubble {
  position: fixed;
  z-index: 100;
  max-width: 220px;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(20, 22, 30, 0.95);
  color: var(--text);
  font-size: 0.72rem;
  line-height: 1.45;
  text-align: center;
  white-space: pre-wrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}
.telescope-bubble.visible { opacity: 1; }
.telescope-bubble::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-top-color: rgba(20, 22, 30, 0.95);
}

/* ---------- Small screens ---------- */

@media (max-width: 760px) {
  .page {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 1.75rem 1.25rem 1.5rem;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 88px;
    gap: 0 1rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--line);
  }
  .sb-id { grid-column: 1; grid-row: 1; }
  .sb-photo { grid-column: 2; grid-row: 1 / span 2; margin: 0; aspect-ratio: 1; }
  .sidebar nav { grid-column: 1; }
  .sb-nav { display: flex; flex-wrap: wrap; gap: 0.1rem 0.9rem; margin: 0.9rem 0 0.8rem; }
  .sb-nav li { margin: 0; }
  .social-links { grid-column: 1 / -1; }

  .entry-thumb, .entry-thumb--wide { width: 110px; margin-left: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .thumbs img, .telescope-bubble { transition: none; }
}

sub, sup { font-size: 0.7em; line-height: 0; }