/* ==========================================================================
   The Index — Guillem Mirabent Rubinat
   Static site stylesheet. Plain CSS, no framework.
   ========================================================================== */

:root {
  /* Paper + ink (light mode / default) */
  --paper:        #EDE6D3;
  --paper-deep:   #E0D7BE;
  --paper-dot:    rgba(0, 0, 0, 0.025);
  --ink:          #1A1713;
  --ink-soft:     #4A4238;
  --ink-faint:    #8A8275;
  --rule:         #B9AF95;

  /* Accents */
  --oxblood:      #7A2E2A;
  --oxblood-hover:#63211E;
  --olive:        #5F6E2E;
  --navy:         #263749;

  /* Type */
  --serif: "EB Garamond", Georgia, serif;
  --serif-2: "EB Garamond", Georgia, serif;
  --sans:  "Söhne", "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Layout */
  --page-max: 1180px;
  --gutter: 40px;
  --gutter-mobile: 22px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* Dark mode */
:root[data-theme="dark"] {
  --paper:        #1B1814;
  --paper-deep:   #242019;
  --paper-dot:    rgba(255, 255, 255, 0.03);
  --ink:          #EDE6D3;
  --ink-soft:     #C5BDA8;
  --ink-faint:    #857D6C;
  --rule:         #3D382E;
  --oxblood:      #D0645A;
  --oxblood-hover:#E07A71;
  --olive:        #A5B26A;
}

/* ---- Reset / base ---- */
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image: radial-gradient(circle at 0 0, var(--paper-dot) 1px, transparent 1px);
  background-size: 4px 4px;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

/* Page-enter fade (subtle) */
main {
  animation: enter 0.55s var(--ease) both;
}
@keyframes enter {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

::selection { background: var(--oxblood); color: var(--paper); }

/* ==========================================================================
   Masthead
   ========================================================================== */

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 24px var(--gutter) 16px;
  border-bottom: 2px solid var(--ink);
  max-width: var(--page-max);
  margin: 0 auto;
}
.wordmark {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.1;
}
.wordmark em { font-style: italic; color: var(--oxblood); font-weight: 500; }
.wordmark .smallcaps {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  font-weight: 400;
  margin-right: 6px;
}
.running-head {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

/* ==========================================================================
   Primary nav
   ========================================================================== */

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  padding: 10px var(--gutter);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  max-width: var(--page-max);
  margin: 0 auto;
}
.nav-links { display: flex; gap: 26px; flex-wrap: wrap; }
.nav-links a {
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-links a:hover {
  color: var(--oxblood);
  border-bottom-color: var(--oxblood);
}
.nav-links a[aria-current="page"] {
  color: var(--oxblood);
  border-bottom-color: var(--oxblood);
}

/* Theme toggle */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--rule);
  white-space: nowrap;
  flex-shrink: 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  padding: 5px 10px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.theme-toggle:hover { color: var(--oxblood); border-color: var(--oxblood); }

/* ==========================================================================
   Page container
   ========================================================================== */

main {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 44px var(--gutter) 80px;
}

.colophon {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 14px var(--gutter) 22px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

/* ==========================================================================
   HOME
   ========================================================================== */

.home-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 56px;
}

.entry-badge {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--oxblood);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 14px;
}

.hero {
  font-family: var(--serif);
  font-size: clamp(48px, 7vw, 84px);
  line-height: 0.95;
  margin: 0;
  font-weight: 400;
  letter-spacing: -0.035em;
  color: var(--ink);
}
.hero em { font-style: italic; color: var(--oxblood); font-weight: 400; }

.lede {
  margin-top: 28px;
  max-width: 520px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.cta-row {
  margin-top: 32px;
  display: inline-flex;
  font-family: var(--mono);
  font-size: 12px;
}
.btn {
  padding: 11px 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--ink);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
  cursor: pointer;
}
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--oxblood); border-color: var(--oxblood); transform: translateY(-1px); }
.btn.ghost { color: var(--ink); border-left: 0; }
.btn.ghost:hover { background: var(--paper-deep); color: var(--oxblood); }

.portrait {
  width: 100%;
  aspect-ratio: 4 / 5;
  background-size: cover;
  background-position: center;
  border: 1px solid var(--ink);
  filter: sepia(0.12) contrast(1.04);
  transition: filter 0.4s var(--ease);
}
.portrait:hover { filter: sepia(0) contrast(1); }

.caption {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin-top: 8px;
  text-align: right;
  text-transform: uppercase;
}

.pullbox {
  margin-top: 22px;
  padding: 16px;
  background: var(--paper-deep);
  border-left: 3px solid var(--oxblood);
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.pullbox .label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  margin-bottom: 6px;
  text-transform: uppercase;
}

/* ==========================================================================
   INDEX TABLES (projects, publications, slides)
   ========================================================================== */

.index-head {
  display: grid;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.index-row {
  display: grid;
  gap: 18px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
  transition: background 0.2s var(--ease), padding 0.3s var(--ease);
}
.index-row:hover {
  background: var(--paper-deep);
  padding-left: 10px;
  padding-right: 10px;
}
.index-row .arrow {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--oxblood);
  justify-self: end;
  transition: transform 0.3s var(--ease);
}
.index-row:hover .arrow { transform: translateX(6px); }

.index-row .num, .index-row .year {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
}
.index-row .title-line {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.index-row .subtitle {
  font-size: 12.5px;
  color: var(--ink-soft);
  max-width: 560px;
}
.index-row .tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--olive);
  text-transform: uppercase;
}

/* Column layouts per page */
.grid-projects, .grid-projects .index-head, .grid-projects .index-row {
  grid-template-columns: 54px 64px 1fr 140px 40px;
}
.grid-pubs, .grid-pubs .index-head, .grid-pubs .index-row {
  grid-template-columns: 54px 64px 1fr 160px 40px;
}
.grid-slides, .grid-slides .index-head, .grid-slides .index-row {
  grid-template-columns: 54px 110px 1fr 140px 40px;
}

/* ==========================================================================
   SINGLE PROJECT
   ========================================================================== */

.project-page {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 48px;
}

.project-page h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(32px, 4.5vw, 48px);
  line-height: 1.05;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.project-page h1 em { font-style: italic; color: var(--oxblood); font-weight: 400; }

.hero-image {
  width: 100%;
  aspect-ratio: 16 / 7;
  background-size: cover;
  background-position: center;
  border: 1px solid var(--ink);
  margin: 22px 0 28px;
  filter: sepia(0.06);
}
.hero-image.is-square { aspect-ratio: 1 / 1; }
.hero-image.is-tall   { aspect-ratio: 4 / 3; }

/* Inline figure — diagrams / graphs that shouldn't be sepia-tinted. */
.prose figure {
  margin: 28px 0;
}
.prose figure img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--paper);
  border: 1px solid var(--rule);
}
.prose figure figcaption {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: 10px;
  text-align: center;
}
:root[data-theme="dark"] .prose figure img {
  /* Most research graphs are white-bg — soften in dark mode. */
  filter: invert(0.92) hue-rotate(180deg);
  background: #fff;
}

.meta-grid {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 14px 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.meta-grid dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  padding-top: 4px;
  text-transform: uppercase;
}
.meta-grid dd { margin: 0; }

.prose p { font-size: 15px; line-height: 1.75; color: var(--ink-soft); }
.prose p + p { margin-top: 1em; }
.prose h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 26px;
  letter-spacing: -0.01em;
  margin: 2em 0 0.5em;
}
.prose code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--paper-deep);
  padding: 1px 5px;
}
.prose pre {
  background: var(--paper-deep);
  padding: 16px;
  border-left: 3px solid var(--olive);
  font-size: 12.5px;
  overflow-x: auto;
}
.prose pre code { background: transparent; padding: 0; }

/* Project sidebar */
.aside-card {
  background: var(--paper-deep);
  padding: 18px;
  border-top: 3px solid var(--oxblood);
}
.aside-card .label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.metric-k {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.metric-v {
  font-family: var(--serif);
  font-size: 28px;
  color: var(--ink);
  line-height: 1;
  margin-top: 2px;
}

.link-list {
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.95;
  color: var(--ink-soft);
}
.link-list .label {
  color: var(--ink-faint);
  letter-spacing: 0.12em;
  font-size: 9.5px;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.link-list a {
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.link-list a:hover { color: var(--oxblood); border-bottom-color: var(--oxblood); }

.pager {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 14px var(--gutter);
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.pager a { transition: color 0.2s var(--ease); }
.pager a:hover { color: var(--oxblood); }

/* ==========================================================================
   ABOUT
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
}

.about-aside .portrait { width: 220px; }

.lined-section { display: flex; flex-direction: column; gap: 28px; }
.lined-section > * {
  position: relative;
  padding-left: 56px;
  margin: 0;
}
.lined-section > *::before {
  content: attr(data-line);
  position: absolute;
  left: 0;
  top: 0.6em;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  user-select: none;
  width: 40px;
  text-align: right;
}
.lined-section .lead {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink);
}
.lined-section p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.lined-section p.quote {
  font-family: var(--serif);
  font-size: 17px;
  font-style: italic;
  line-height: 1.55;
  color: var(--ink-soft);
  border-left: 2px solid var(--olive);
  padding-left: 14px;
  margin-left: 56px;
}
.lined-section p.quote::before { left: -56px; }

.edu-table { width: 100%; border-collapse: collapse; margin-top: 6px; }
.edu-table tr { border-top: 1px solid var(--rule); }
.edu-table tr:last-child { border-bottom: 1px solid var(--rule); }
.edu-table td { padding: 12px 0; font-size: 13px; color: var(--ink-soft); vertical-align: top; }
.edu-table td.date { font-family: var(--mono); color: var(--ink-faint); width: 90px; }
.edu-table td .degree { font-family: var(--serif); font-size: 17px; color: var(--ink); }

.about-section-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  margin-bottom: 10px;
  text-transform: uppercase;
}

/* ==========================================================================
   CONTACT
   ========================================================================== */

.contact-wrap { max-width: 720px; }

.contact-hero {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(42px, 6vw, 64px);
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
}
.contact-hero em { font-style: italic; color: var(--oxblood); font-weight: 400; }

.contact-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--ink);
}
.contact-split > div { padding: 22px; }
.contact-split > div:first-child { border-right: 1px solid var(--ink); }
.contact-split .label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.contact-split pre {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink);
  white-space: pre-wrap;
}

.socials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 28px;
}
.social-card {
  padding: 16px;
  background: var(--paper-deep);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
  display: block;
}
.social-card:hover { transform: translateY(-2px); background: var(--paper); }
.social-card.navy    { border-top: 3px solid var(--navy); }
.social-card.olive   { border-top: 3px solid var(--olive); }
.social-card.oxblood { border-top: 3px solid var(--oxblood); }
.social-card .k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.social-card .v {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  margin-top: 6px;
}

/* ==========================================================================
   404
   ========================================================================== */
.errpage { text-align: center; padding: 80px 20px; }
.errpage .code {
  font-family: var(--serif);
  font-size: 200px;
  line-height: 1;
  font-style: italic;
  color: var(--oxblood);
  letter-spacing: -0.04em;
  margin: 0;
}
.errpage .msg {
  font-family: var(--serif);
  font-size: 28px;
  margin: 10px 0 0;
}
.errpage .mono {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.14em;
  margin-top: 18px;
  text-transform: uppercase;
}

/* ==========================================================================
   Serif picker (landing-only)
   ========================================================================== */
.serif-picker {
  max-width: 920px;
  margin: 40px auto 0;
  padding: 0 var(--gutter);
}
.serif-picker h2 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin: 0 0 18px;
}
.serif-row {
  display: grid;
  grid-template-columns: 140px 1fr 42px;
  gap: 20px;
  align-items: baseline;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
  cursor: pointer;
  transition: background 0.2s var(--ease), padding 0.3s var(--ease);
}
.serif-row:hover { background: var(--paper-deep); padding-left: 10px; padding-right: 10px; }
.serif-row:last-child { border-bottom: 1px solid var(--rule); }
.serif-row .font-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
.serif-row .font-preview {
  font-size: 44px;
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.serif-row .font-preview em { font-style: italic; color: var(--oxblood); }
.serif-row.is-active { background: var(--paper-deep); }
.serif-row.is-active .font-label { color: var(--oxblood); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 860px) {
  :root { --gutter: var(--gutter-mobile); }
  .masthead { flex-direction: column; align-items: flex-start; gap: 6px; }
  .nav { flex-direction: column; align-items: flex-start; gap: 10px; }
  .home-grid { grid-template-columns: 1fr; gap: 32px; }
  .project-page { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-aside .portrait { width: 180px; }
  .grid-projects, .grid-projects .index-head, .grid-projects .index-row,
  .grid-pubs, .grid-pubs .index-head, .grid-pubs .index-row,
  .grid-slides, .grid-slides .index-head, .grid-slides .index-row {
    grid-template-columns: 42px 1fr 30px;
  }
  .index-row .year, .index-head .year-col,
  .index-row .tag, .index-head .tag-col { display: none; }
  .contact-split { grid-template-columns: 1fr; }
  .contact-split > div:first-child { border-right: 0; border-bottom: 1px solid var(--ink); }
  .socials { grid-template-columns: 1fr; }
  .serif-row { grid-template-columns: 1fr; gap: 6px; }
}