/* ============================================================
   Lorenzo Longiave — Portfolio site styles
   Built on colors_and_type.css design tokens.

   Conventions
   - All sizes/spacing/colors come from --ll-* tokens unless a
     comment explicitly notes a deliberate off-token value.
   - Off-token sizes are rare and called out: the only one is the
     11px "tag label" size (one notch below --ll-text-mono) used
     for tight uppercase labels in the marquee, role pill, and
     panel meta dt's.
   ============================================================ */

/* ----------------------------------------------------------------
   Reset
---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; }

/* ----------------------------------------------------------------
   Accessibility utilities
---------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: var(--ll-s-2) var(--ll-s-4);
  background: var(--ll-ink);
  color: var(--ll-paper);
  font-family: var(--ll-font-mono);
  font-size: var(--ll-text-mono);
  z-index: 100;
}
.skip-link:focus { left: var(--ll-s-4); top: var(--ll-s-4); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

:focus-visible {
  outline: 2px solid var(--ll-signal);
  outline-offset: 2px;
}
.ll-btn:focus-visible { outline-offset: 3px; }

/* ----------------------------------------------------------------
   Header
---------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--ll-s-5);
  padding: var(--ll-s-4) var(--ll-margin);
  background: color-mix(in srgb, var(--ll-paper) 92%, transparent);
  border-bottom: 1px solid var(--ll-hairline);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--ll-s-3);
  font-family: var(--ll-font-display);
  font-size: var(--ll-text-lg);
  font-weight: var(--ll-w-medium);
  letter-spacing: var(--ll-track-snug);
  text-decoration: none;
  color: var(--ll-ink);
  line-height: 1;
}
.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--ll-s-6);
  height: var(--ll-s-6);
  background: var(--ll-ink);
  color: var(--ll-paper);
  font-family: var(--ll-font-display);
  font-weight: var(--ll-w-medium);
  font-size: var(--ll-text-sm);
  letter-spacing: -0.04em; /* slightly tighter than --ll-track-tight to fit "L·L" in 32px */
  line-height: 1;
  flex-shrink: 0;
}
.brand__name { line-height: 1; }

.primary-nav {
  display: flex;
  align-items: baseline;
  gap: var(--ll-s-6);
}
.nav-link {
  font-size: var(--ll-text-sm);
  color: var(--ll-smoke);
}
.nav-link:hover,
.nav-link:focus-visible { color: var(--ll-ink); }

.nav-link--ext {
  font-family: var(--ll-font-mono);
  font-size: var(--ll-text-mono);
  letter-spacing: var(--ll-track-caps);
  text-transform: uppercase;
}

/* Hamburger */
.nav-toggle {
  display: none;
  appearance: none;
  border: 0;
  background: transparent;
  width: var(--ll-s-7);
  height: var(--ll-s-7);
  padding: 0;
  cursor: pointer;
  position: relative;
}
.nav-toggle__line {
  position: absolute;
  left: var(--ll-s-2);
  right: var(--ll-s-2);
  height: 1px;
  background: var(--ll-ink);
  transition: transform var(--ll-dur) var(--ll-ease),
              top var(--ll-dur) var(--ll-ease),
              opacity var(--ll-dur) var(--ll-ease);
}
.nav-toggle__line:nth-child(1) { top: 18px; }
.nav-toggle__line:nth-child(2) { top: 28px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  top: 23px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(2) {
  top: 23px;
  transform: rotate(-45deg);
}

/* ----------------------------------------------------------------
   Generic section
---------------------------------------------------------------- */
.section { padding: var(--ll-section) var(--ll-margin); }

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--ll-s-5);
  margin-bottom: var(--ll-s-8);
  flex-wrap: wrap;
}

/* ----------------------------------------------------------------
   Hero
---------------------------------------------------------------- */
.hero { padding: var(--ll-section) var(--ll-margin) var(--ll-s-9); }

.hero__eyebrow { margin: 0 0 var(--ll-s-5); }

.hero__title { margin: 0 0 var(--ll-s-6); }
.hero__title .serif {
  font-family: var(--ll-font-serif);
  font-style: italic;
  font-weight: var(--ll-w-regular);
}

.hero__lead {
  max-width: 56ch;
  color: var(--ll-smoke);
  margin: 0 0 var(--ll-s-7);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ll-s-4);
}

.hero__rule { margin: 0 var(--ll-margin); }

/* ----------------------------------------------------------------
   Marquee
---------------------------------------------------------------- */
.marquee {
  border-left: 0;
  border-right: 0;
  padding: var(--ll-s-4) 0;
}
.marquee__track {
  font-family: var(--ll-font-mono);
  font-size: 11px; /* tight tag label, one step below --ll-text-mono */
  font-weight: var(--ll-w-regular);
  line-height: 1;
  letter-spacing: var(--ll-track-caps);
  text-transform: uppercase;
  color: var(--ll-smoke);
  animation-duration: 120s;
}
.marquee__item {
  display: inline-block;
  vertical-align: middle;
}
.marquee__dot {
  display: inline-block;
  vertical-align: middle;
  width: 5px;
  height: 5px;
  border-radius: var(--ll-r-pill);
  background: var(--ll-signal);
  margin: 0 var(--ll-s-3);
}
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
}

/* ----------------------------------------------------------------
   Work section — list of project rows
---------------------------------------------------------------- */
.work {
  padding-top: var(--ll-s-9);
  padding-bottom: var(--ll-s-9);
}

.projects {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--ll-hairline);
}
.projects > li { display: block; }

.project {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) 200px 110px;
  gap: var(--ll-s-5);
  align-items: baseline;
  padding: var(--ll-s-6) 0;
  border-top: 1px solid var(--ll-hairline);
  text-decoration: none;
  color: var(--ll-fg-2);
  transition: color var(--ll-dur) var(--ll-ease),
              background var(--ll-dur) var(--ll-ease),
              padding var(--ll-dur) var(--ll-ease);
}
.project:hover,
.project:focus-visible {
  color: var(--ll-fg-1);
  background: var(--ll-bone);
  padding-left: var(--ll-s-4);
  padding-right: var(--ll-s-4);
  outline: none;
}
.project:focus-visible { box-shadow: inset 0 0 0 1px var(--ll-ink); }

.project__main {
  display: flex;
  flex-direction: column;
  gap: var(--ll-s-3);
  min-width: 0;
}

/* Override design system's .ll-row__title (44px) with a responsive title */
.project .ll-row__title {
  font-size: clamp(28px, 4vw, 48px);
  line-height: var(--ll-lead-display);
  display: block;
}

.project__role {
  display: inline-block;
  font-family: var(--ll-font-mono);
  font-style: normal;
  font-weight: var(--ll-w-regular);
  font-size: 11px; /* tight tag label, one step below --ll-text-mono */
  line-height: 1;
  letter-spacing: var(--ll-track-caps);
  text-transform: uppercase;
  color: var(--ll-smoke);
  vertical-align: 0.4em;
  white-space: normal;
  margin-left: var(--ll-s-3);
}
.project:hover .project__role { color: var(--ll-ink); }

.project__blurb {
  font-family: var(--ll-font-sans);
  font-style: normal;
  font-weight: var(--ll-w-regular);
  font-size: var(--ll-text-base);
  line-height: var(--ll-lead-body);
  letter-spacing: var(--ll-track-normal);
  color: var(--ll-smoke);
  max-width: 64ch;
}
.project:hover .project__blurb { color: var(--ll-ink); }

.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ll-s-2);
  margin-top: var(--ll-s-1);
}

.project__meta { white-space: nowrap; }
.project__year { white-space: nowrap; text-align: right; }

.work__more {
  margin-top: var(--ll-s-7);
  font-family: var(--ll-font-mono);
  font-size: var(--ll-text-sm);
  letter-spacing: var(--ll-track-mono);
}

/* ----------------------------------------------------------------
   Indicator (used on both linked OSS rows and expandable details)
---------------------------------------------------------------- */
.project__indicator {
  display: inline-block;
  margin-left: var(--ll-s-3);
  font-family: var(--ll-font-mono);
  font-size: var(--ll-text-sm);
  line-height: 1;
  color: var(--ll-smoke);
  transition: transform var(--ll-dur) var(--ll-ease),
              color var(--ll-dur) var(--ll-ease);
}
/* Hover slide → ink */
.oss-row:hover .project__indicator,
.project-details:not([open]) > summary:hover .project__indicator {
  transform: translateX(4px);
  color: var(--ll-ink);
}
/* Open state: rotate 90° + signal */
.project-details[open] .project__indicator {
  transform: rotate(90deg);
  color: var(--ll-signal);
}

/* ----------------------------------------------------------------
   OSS row (anchor variant of project row)
---------------------------------------------------------------- */
.oss-row { cursor: pointer; text-decoration: none; }

/* ----------------------------------------------------------------
   Expandable role rows (employment list)
---------------------------------------------------------------- */
.project-details {
  display: block;
  border-top: 1px solid var(--ll-hairline);
  transition: background var(--ll-dur) var(--ll-ease);
}
.projects > li:last-child .project-details {
  border-bottom: 1px solid var(--ll-hairline);
}
.project-details > summary {
  list-style: none;
  cursor: pointer;
  outline: none;
}
.project-details > summary::-webkit-details-marker { display: none; }
.project-details > summary::marker { display: none; }
.project-details > summary > .project { border-top: 0; }
.project-details > summary:focus-visible > .project {
  box-shadow: inset 0 0 0 1px var(--ll-ink);
}

.project-details[open] {
  background: var(--ll-bone);
  padding: 0 var(--ll-s-4);
  margin: 0 calc(var(--ll-s-4) * -1);
}
.project-details[open] > summary > .project { color: var(--ll-fg-1); }
.project-details[open] > summary > .project .project__blurb { color: var(--ll-ink); }
/* When open, neutralise the row's hover transform (panel handles emphasis) */
.project-details[open] > summary > .project:hover {
  background: transparent;
  padding-left: 0;
  padding-right: 0;
}

.project__panel {
  display: grid;
  grid-template-columns: 56px minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--ll-s-5);
  padding: 0 0 var(--ll-s-8);
  align-items: start;
}
.project__panel-main { grid-column: 2; }

.project__role-statement {
  font-family: var(--ll-font-serif);
  font-style: italic;
  font-size: var(--ll-text-lg);
  line-height: var(--ll-lead-snug);
  color: var(--ll-ink);
  max-width: 60ch;
  margin: 0 0 var(--ll-s-5);
}

.project__bullets {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--ll-font-sans);
  font-size: var(--ll-text-sm);
  line-height: var(--ll-lead-body);
  color: var(--ll-fg-1);
}
.project__bullets > li {
  position: relative;
  padding-left: var(--ll-s-5);
  margin-bottom: var(--ll-s-3);
  max-width: 64ch;
}
.project__bullets > li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ll-mist);
}
.project__bullets strong {
  font-weight: var(--ll-w-medium);
  color: var(--ll-ink);
}

.project__panel-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ll-s-2);
  margin-top: var(--ll-s-5);
}

.project__panel-meta {
  grid-column: 3;
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--ll-s-3) var(--ll-s-4);
  font-family: var(--ll-font-sans);
  font-size: var(--ll-text-sm);
  line-height: var(--ll-lead-snug);
  color: var(--ll-fg-1);
  align-self: start;
  padding-top: var(--ll-s-1);
}
.project__panel-meta dt {
  font-family: var(--ll-font-mono);
  font-size: 11px; /* tight tag label, one step below --ll-text-mono */
  letter-spacing: var(--ll-track-caps);
  text-transform: uppercase;
  color: var(--ll-smoke);
  padding-top: 3px;
}
.project__panel-meta dd { margin: 0; }

/* ----------------------------------------------------------------
   Quote section (inverted)
---------------------------------------------------------------- */
.quote-section {
  padding: var(--ll-s-9) var(--ll-margin);
  background: var(--ll-ink);
  color: var(--ll-paper);
}
.quote-section__quote {
  max-width: 18ch;
  color: var(--ll-paper);
}
.quote-section__attr {
  margin-top: var(--ll-s-5);
  color: var(--ll-mist);
}

/* ----------------------------------------------------------------
   About
---------------------------------------------------------------- */
.about__eyebrow { margin: 0 0 var(--ll-s-6); }

.about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--ll-s-9);
  align-items: start;
}

.about__copy { max-width: 60ch; }
.about__sub  { color: var(--ll-smoke); }
.about__rule { margin: var(--ll-s-8) 0 var(--ll-s-6); }

.meta-list {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--ll-s-3) var(--ll-s-5);
  margin: 0;
  max-width: 60ch;
}
.meta-list dt { align-self: baseline; }
.meta-list dd { margin: 0; }

.about__skills-title { margin: 0 0 var(--ll-s-6); }

.skills {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ll-s-5);
  margin: 0;
}
.skills dt { margin-bottom: var(--ll-s-3); }
.skills dd { margin: 0 0 var(--ll-s-5); }

.tag-row {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--ll-s-2);
}

/* ----------------------------------------------------------------
   Contact (inverted)
---------------------------------------------------------------- */
.contact {
  background: var(--ll-ink);
  color: var(--ll-paper);
}
.contact__eyebrow {
  margin: 0 0 var(--ll-s-6);
  color: var(--ll-mist);
}

/* Bespoke responsive clamp — between --ll-text-3xl (72) and --ll-text-display */
.contact__title {
  font-size: clamp(56px, 10vw, 140px);
  margin: 0 0 var(--ll-s-9);
  color: var(--ll-paper);
}
.contact__title .serif {
  font-family: var(--ll-font-serif);
  font-style: italic;
  font-weight: var(--ll-w-regular);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--ll-s-9);
  align-items: start;
}

.contact__lead { color: var(--ll-paper); margin: 0 0 var(--ll-s-5); max-width: 48ch; }
.contact__body { color: var(--ll-mist); max-width: 48ch; }
.contact__email { color: var(--ll-paper); }

.contact__links {
  list-style: none;
  margin: var(--ll-s-7) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--ll-s-5);
  font-family: var(--ll-font-mono);
  font-size: var(--ll-text-sm);
  letter-spacing: var(--ll-track-mono);
  text-transform: lowercase;
  color: var(--ll-mist);
}
.contact__links a:hover,
.contact__links a:focus-visible { color: var(--ll-paper); }

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--ll-s-5);
}

.contact__field {
  border-bottom-color: var(--ll-hairline-paper);
  color: var(--ll-paper);
}
.contact__field::placeholder { color: var(--ll-mist); }
.contact__field:focus { border-bottom-color: var(--ll-paper); }

.contact__submit {
  align-self: flex-start;
  background: var(--ll-paper);
  color: var(--ll-ink);
  margin-top: var(--ll-s-3);
}
.contact__submit:hover {
  background: var(--ll-signal);
  color: var(--ll-paper);
}
.contact__submit[disabled] { opacity: 0.6; cursor: default; }

.contact__status {
  margin: 0;
  min-height: 1em;
  color: var(--ll-mist);
}

/* ----------------------------------------------------------------
   Footer
---------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--ll-hairline);
  padding: var(--ll-s-3) var(--ll-margin);
  display: flex;
  flex-wrap: wrap;
  gap: var(--ll-s-4);
  justify-content: space-between;
  align-items: center;
  background: var(--ll-paper);
  color: var(--ll-smoke);
}
.footer__dot {
  display: inline-block;
  width: var(--ll-s-2);
  height: var(--ll-s-2);
  margin-right: var(--ll-s-2);
  border-radius: var(--ll-r-pill);
  background: var(--ll-signal);
  vertical-align: 0.06em;
}

/* ----------------------------------------------------------------
   Reveal-on-scroll
---------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--ll-dur-slow) var(--ll-ease),
              transform var(--ll-dur-slow) var(--ll-ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ================================================================
   Responsive
================================================================ */
@media (max-width: 960px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--ll-s-8);
  }
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--ll-s-8);
  }
  .project {
    grid-template-columns: 40px minmax(0, 1fr) 80px;
    gap: var(--ll-s-4);
  }
  .project__meta {
    grid-column: 2 / 3;
    margin-top: var(--ll-s-2);
  }
  .project__panel {
    grid-template-columns: 1fr;
    padding-left: var(--ll-s-4);
    padding-right: var(--ll-s-4);
  }
  .project__panel-main,
  .project__panel-meta { grid-column: 1; }
  .project__panel-meta { margin-top: var(--ll-s-6); }
}

@media (max-width: 640px) {
  .site-header {
    padding: var(--ll-s-4) var(--ll-margin);
    flex-wrap: wrap;
    align-items: center;
    row-gap: 0;
  }

  .nav-toggle { display: block; order: 2; }

  .primary-nav {
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--ll-s-4);
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    max-height: 0;
    transition: max-height var(--ll-dur) var(--ll-ease),
                padding-top var(--ll-dur) var(--ll-ease),
                padding-bottom var(--ll-dur) var(--ll-ease);
  }
  .primary-nav .nav-link { font-size: var(--ll-text-base); }
  .primary-nav.is-open {
    max-height: 320px;
    margin-top: var(--ll-s-3);
    padding-top: var(--ll-s-5);
    padding-bottom: var(--ll-s-4);
  }

  .hero { padding-top: var(--ll-s-9); }

  .meta-list {
    grid-template-columns: 1fr;
    gap: var(--ll-s-2);
  }
  .meta-list dt { margin-top: var(--ll-s-3); }

  .project__role {
    display: block;
    margin-left: 0;
    margin-top: var(--ll-s-2);
    vertical-align: baseline;
  }

  .project {
    grid-template-columns: 32px 1fr;
    grid-template-areas:
      "num title"
      ".   blurb"
      ".   tags"
      ".   meta"
      ".   year";
    padding: var(--ll-s-5) 0;
  }
  .project .ll-row__num   { grid-area: num; }
  .project .project__main { grid-area: title; }
  .project__meta { grid-area: meta; margin-top: var(--ll-s-2); }
  .project__year { grid-area: year; text-align: left; margin-top: var(--ll-s-2); }
  .project:hover { padding-left: var(--ll-s-2); padding-right: var(--ll-s-2); }

  .project__panel {
    padding-left: var(--ll-s-3);
    padding-right: var(--ll-s-3);
  }
  .project-details[open] {
    padding-left: var(--ll-s-3);
    padding-right: var(--ll-s-3);
    margin-left: calc(var(--ll-s-3) * -1);
    margin-right: calc(var(--ll-s-3) * -1);
  }

  .quote-section__quote { max-width: none; }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--ll-s-2);
  }
}