/* ============================================================
   EVANA THOMSON — design tokens
   ------------------------------------------------------------
   EDIT THESE VARIABLES TO RESKIN THE WHOLE SITE.
   ============================================================ */

:root {
  /* Backgrounds */
  --bg:            #FFFFFF;

  /* Text */
  --text:          #6D788E;   /* body / sidebar text */
  --text-heading:  #6D1F42;   /* name + "Hello!" (Seasons) */
  --text-muted:    #9AA3B2;   /* small / supporting text */
  --rule:          #E8EAEE;   /* hairline rules + borders */

  /* Section / nav accent colors (Lazydog) */
  --c-about:       #DB7A73;   /* About Me  — coral */
  --c-coursework:  #B9DB97;   /* Coursework — green */
  --c-projects:    #B89DC7;   /* Projects   — lavender (placeholder; you gave #FFF8EE which is invisible on white) */
  --c-research:    #EFD365;   /* Research   — yellow */
  --c-resume:      #98C9B5;   /* Resume     — sage (you didn't specify, easy to change) */

  /* Fonts */
  --font-display:  'Seasons',  'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-sans:     'Sauce',    'DM Sans',          'Inter',              system-ui, sans-serif;
  --font-display-chunky: 'Lazydog', 'Lilita One', 'Fredoka', 'Patrick Hand SC', cursive;

  /* Spacing scale */
  --s-1:  4px;
  --s-2:  8px;
  --s-3:  12px;
  --s-4:  16px;
  --s-5:  24px;
  --s-6:  32px;
  --s-7:  48px;
  --s-8:  64px;
  --s-9:  96px;

  /* Layout */
  --page-max:      1180px;
  --gutter:        clamp(20px, 4vw, 56px);
  --sidebar-w:     300px;
}

/* ============================================================
   RESET-ISH
   ============================================================ */
*, *::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-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, p { margin: 0; }

/* ============================================================
   TOP NAV (shared across all pages — injected by /js/nav.js)
   Nav scrolls away with the page (not sticky) so it disappears
   as the user scrolls down.
   ============================================================ */
.site-nav {
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}
.nav-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 22px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  color: var(--text-heading);
  line-height: 0;
  transition: opacity .15s ease;
}
.nav-brand:hover { opacity: 0.7; }
.nav-brand svg { width: 28px; height: 28px; display: block; }
.nav-brand img  { width: 54px; height: 54px; display: block; object-fit: cover; border-radius: 50%; }
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 38px);
}
.nav-link {
  font-family: var(--font-display-chunky);
  font-size: 19px;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  padding: 8px 18px;
  border-radius: 999px;
  white-space: nowrap;
  transition: background-color .18s ease, color .18s ease;
  background: transparent;
}
.nav-link:hover,
.nav-link.is-active {
  background: var(--link-c);
  color: #fff;
}
.nav-about      { --link-c: var(--c-about);      color: var(--c-about); }
.nav-coursework { --link-c: var(--c-coursework); color: var(--c-coursework); }
.nav-projects   { --link-c: var(--c-projects);   color: var(--c-projects); }
.nav-research   { --link-c: var(--c-research);   color: var(--c-research); }
.nav-resume     { --link-c: var(--c-resume);     color: var(--c-resume); }

/* ============================================================
   PAGE SHELL
   ============================================================ */
.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 48px) var(--gutter) var(--s-9);
}

/* About page = fits in one viewport, vertically centered between nav & footer */
body[data-page="about"] {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}
body[data-page="about"] main.page {
  display: flex;
  align-items: center;
  padding-top: var(--s-5);
  padding-bottom: var(--s-5);
}
body[data-page="about"] .about-grid {
  width: 100%;
}
.page-title {
  font-family: var(--font-display-chunky);
  font-size: clamp(48px, 7vw, 84px);
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  margin-bottom: var(--s-7);
}
.page-title.is-about      { color: var(--c-about); }
.page-title.is-coursework { color: var(--c-coursework); }
.page-title.is-projects   { color: var(--c-projects); }
.page-title.is-research   { color: var(--c-research); }
.page-title.is-resume     { color: var(--c-resume); }

/* ============================================================
   ABOUT ME / HOME — sidebar + content layout
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}

/* ---- Sidebar (Jason-style) ---- */
.sidebar {
  position: sticky;
  top: 110px;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.sidebar .photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  background: #F3F4F6;
}
.sidebar .photo img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.sidebar .name {
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1.1;
  color: var(--text-heading);
  margin-top: var(--s-2);
}
.sidebar .role {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text);
  line-height: 1.5;
}
.sidebar .role-item + .role-item {
  margin-top: 2px;
}

/* social icon links */
.sidebar .socials {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  margin-top: 0;
}
.sidebar .socials a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text);
  padding: 4px 0;
  transition: color .15s ease;
}
.sidebar .socials a:hover { color: var(--text-heading); }
.sidebar .socials .icon {
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--text);
  flex-shrink: 0;
}
.sidebar .socials .icon svg { width: 18px; height: 18px; }

/* ---- Right content ---- */
.about-content {
  max-width: 640px;
  padding-top: 90px;
}
.about-content .hello {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1;
  color: var(--text-heading);
  margin-bottom: var(--s-5);
}
.about-content p {
  font-family: var(--font-sans);
  font-size: 16.5px;
  color: var(--text);
  line-height: 1.75;
}
.about-content p + p { margin-top: var(--s-4); }
.about-content strong {
  font-weight: 600;
  color: var(--text);
}
.about-content a.inline-link {
  color: var(--c-about);
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}
.about-content a.inline-link:hover { opacity: 0.75; }

.about-content .closer {
  margin-top: var(--s-6);
  color: var(--text-muted);
}

/* ============================================================
   COURSEWORK PAGE
   ------------------------------------------------------------
   Reuses .about-grid + .sidebar so the left column matches the
   about page exactly. Right column gets a Seasons heading
   (matches "Hello,") and semester-grouped bullet lists.
   ============================================================ */
body[data-page="coursework"] main.page {
  padding-top: var(--s-5);
}
body[data-page="coursework"] .about-content {
  padding-top: clamp(16px, 2.5vw, 40px);
}
.coursework-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1.05;
  color: var(--text-heading);
  margin-bottom: var(--s-6);
  font-weight: 600;
}
.coursework-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
}
.coursework-semester {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.coursework-semester .term {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: 0.005em;
}
.coursework-semester ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 0;
}
.coursework-semester li {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: #2e323b;
  padding-left: 22px;
  position: relative;
}
.coursework-semester li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0.7em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-heading);
}
.coursework-semester li .code {
  font-weight: 600;
  color: var(--text-heading);
}

/* ============================================================
   PROJECTS PAGE
   ------------------------------------------------------------
   Full-width 3×3 grid of square tiles. Hover darkens the
   image and fades in the project name + date in white.
   Click → dedicated project page.
   ============================================================ */
body[data-page="projects"] main.page {
  max-width: 1400px;
  padding-top: clamp(40px, 5vw, 64px);
}
.projects-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-5);
  margin-bottom: clamp(28px, 4vw, 48px);
  flex-wrap: wrap;
}
.projects-head .intro {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 40px);
  color: var(--text-heading);
  line-height: 1.1;
  font-weight: 600;
}
.projects-filters {
  display: flex;
  gap: clamp(18px, 2.4vw, 32px);
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--text);
}
.projects-filters button {
  appearance: none;
  border: none;
  background: transparent;
  padding: 4px 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  letter-spacing: 0.01em;
  position: relative;
  transition: color .15s ease;
}
.projects-filters button:hover { color: var(--text-heading); }
.projects-filters button.is-active {
  color: var(--text-heading);
}
.projects-filters button.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 1.6vw, 22px);
}
.project-tile {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: #d9dde4;
  display: block;
  color: #fff;
  text-decoration: none;
  isolation: isolate;
}
.project-tile .ph,
.project-tile img.cover {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
  transition: filter .35s ease, transform .6s ease;
}
.project-tile .ph {
  /* clean white placeholder while images load */
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  color: transparent;
}
.project-tile .overlay {
  position: absolute;
  inset: 0;
  background: rgba(20, 22, 28, 0.0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--s-5);
  opacity: 0;
  transition: opacity .3s ease, background-color .3s ease;
  z-index: 1;
}
.project-tile:hover .overlay,
.project-tile:focus-visible .overlay {
  opacity: 1;
  background: rgba(20, 22, 28, 0.55);
}
.project-tile:hover .ph,
.project-tile:hover img.cover {
  filter: brightness(0.55);
  transform: scale(1.03);
}
.project-tile .pt-name {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.2vw, 30px);
  line-height: 1.1;
  color: #fff;
  font-weight: 600;
  margin-bottom: 10px;
}
.project-tile .pt-date {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.92);
}

/* category color hint for the placeholder bg */
.project-tile[data-cat="compe"] { --tile-bg: #b9c4d3; }
.project-tile[data-cat="ee"]    { --tile-bg: #c9b7c4; }
.project-tile[data-cat="cs"]    { --tile-bg: #b9c9be; }

/* filter state */
.projects-grid.f-compe .project-tile:not([data-cat="compe"]),
.projects-grid.f-ee    .project-tile:not([data-cat="ee"]),
.projects-grid.f-cs    .project-tile:not([data-cat="cs"]) {
  display: none;
}

@media (max-width: 820px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .projects-grid { grid-template-columns: 1fr; }
}

/* tighter rhythm on the research page so it doesn't feel sparse */
body[data-page="research"] .proj-section {
  margin-top: clamp(28px, 3.5vw, 48px);
}
body[data-page="research"] .proj-section + .proj-section {
  padding-top: clamp(24px, 3vw, 40px);
}
body[data-page="research"] .proj-section.proj-hero {
  margin-top: clamp(8px, 1vw, 16px);
}
body[data-page="research"] .pd-head {
  margin-bottom: clamp(8px, 1.4vw, 16px);
}

/* ============================================================
   PROJECT DETAIL PAGE (per-project subpages in /projects/)
   ============================================================ */
.pd-head {
  margin-bottom: clamp(24px, 3vw, 40px);
}
.pd-eyebrow {
  font-family: var(--font-display);
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.15;
  color: var(--text-heading);
  font-weight: 600;
}
.pd-eyebrow .sub {
  color: var(--text-muted);
  font-style: italic;
  font-weight: 400;
  font-size: 0.85em;
}

.pd-media {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(16px, 2vw, 28px);
  margin-bottom: clamp(28px, 4vw, 44px);
  align-items: start;
}
.pd-video {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #000;
  overflow: hidden;
  border-radius: 28px;
  box-shadow:
    0 0 0 1px rgba(162, 181, 237, 0.25),
    0 0 28px rgba(162, 181, 237, 0.45),
    0 14px 38px -6px rgba(162, 181, 237, 0.55);
}
.pd-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}
.pd-images {
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 3vw, 44px);
}
.pd-img {
  width: 100%;
  height: auto;
  display: block;
  background: #f3f4f6;
  border-radius: 18px;
  box-shadow:
    0 0 0 1px rgba(162, 181, 237, 0.22),
    0 0 22px rgba(162, 181, 237, 0.38),
    0 12px 30px -6px rgba(162, 181, 237, 0.5);
}
.pd-img-1 {
  align-self: center;
  width: 88%;
}
.pd-img-2 {
  align-self: center;
  width: 100%;
}

.pd-text {
  max-width: 980px;
  border: 1px solid var(--rule);
  padding: clamp(24px, 3vw, 36px) clamp(24px, 3vw, 40px);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.pd-text p {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: #2e323b;
  margin: 0;
}
.pd-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text);
  margin-top: clamp(28px, 4vw, 44px);
  transition: color .15s ease;
}
.pd-back:hover { color: var(--text-heading); }

@media (max-width: 820px) {
  .pd-media {
    grid-template-columns: 1fr;
  }
  .pd-img-1, .pd-img-2 { width: 100%; }
}

/* ============================================================
   PROJECT SUBPAGE — SHARED SECTION SYSTEM
   Use these on every project page so layout/colors/fonts stay
   uniform. Replaces page-local .qb-* / .cl-* variants.
   ============================================================ */

/* image with the blue aura — no gray padded container */
.proj-img {
  width: 100%;
  height: auto;
  display: block;
  background: transparent;
  border-radius: 18px;
  box-shadow:
    0 0 0 1px rgba(162, 181, 237, 0.22),
    0 0 22px rgba(162, 181, 237, 0.38),
    0 12px 30px -6px rgba(162, 181, 237, 0.5);
}

/* sections + dividers */
.proj-section {
  margin-top: clamp(48px, 6vw, 80px);
}
.proj-section + .proj-section {
  border-top: 1px solid var(--rule);
  padding-top: clamp(40px, 5vw, 64px);
}
.proj-section.proj-hero {
  margin-top: clamp(16px, 2vw, 24px);
}

/* eyebrow + heading + body — same on every page */
.proj-kicker {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--s-3);
}
.proj-section h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.2vw, 40px);
  color: var(--text-heading);
  margin: 0 0 var(--s-2) 0;
  line-height: 1.1;
  font-weight: 600;
}
.proj-section p {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: #2e323b;
  margin: 0;
}
.proj-section p + p { margin-top: var(--s-4); }
.proj-section .gap { height: clamp(20px, 3vw, 32px); }

/* hero figure: image(s) sit directly on the page, no gray box */
.proj-hero-figure {
  margin-bottom: clamp(24px, 3vw, 36px);
  display: flex;
  justify-content: center;
}
.proj-hero-figure .proj-img {
  max-height: 540px;
  width: auto;
  max-width: 100%;
}

/* boxed text blurb (border, no fill) */
.proj-blurb {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: clamp(24px, 3vw, 36px) clamp(24px, 3vw, 40px);
}

/* side-by-side image pair */
.proj-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(20px, 2.4vw, 32px);
  align-items: center;
}
.proj-grid-2 .proj-img { max-height: 420px; width: auto; margin: 0 auto; }

/* image + text two-column */
.proj-split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 32px);
}
.proj-split.reverse { grid-template-columns: 1fr 1.1fr; }
.proj-split.reverse .proj-media { order: 2; }
.proj-media { display: flex; justify-content: center; }
.proj-media .proj-img { max-height: 380px; width: auto; }

@media (max-width: 820px) {
  .proj-split,
  .proj-split.reverse { grid-template-columns: 1fr; }
  .proj-split.reverse .proj-media { order: 0; }
  .proj-grid-2 { grid-template-columns: 1fr; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-foot {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: var(--s-7) var(--gutter) var(--s-6);
  border-top: 1px solid var(--rule);
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  gap: var(--s-4);
  flex-wrap: wrap;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 820px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--s-7);
  }
  .sidebar {
    position: static;
    max-width: 320px;
  }
  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--s-3);
    padding: 18px var(--gutter);
  }
  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }
}