/* -------------------------------------------------------
   CSS Custom Properties
------------------------------------------------------- */
:root {
  --gutter: 56px;
  --grid-gap: var(--gutter);
  --color-text: #111;
  --color-muted: #999;
  --color-border: #e0e0e0;
  --color-bg: #faf8f4;
  --font: system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
}

/* -------------------------------------------------------
   Reset
------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
}

a {
  color: inherit;
  text-decoration: underline;
}

a:visited {
  color: inherit;
}

/* -------------------------------------------------------
   Base
------------------------------------------------------- */
body {
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* -------------------------------------------------------
   Shared container
------------------------------------------------------- */
.global-header,
.main,
.site-footer {
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* -------------------------------------------------------
   Global Header
------------------------------------------------------- */
.global-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: var(--gutter);
  padding-bottom: var(--gutter);
}

.global-header-name {
  text-decoration: none;
}

.global-header-nav {
  display: flex;
  gap: 24px;
}

.global-header-nav a {
  text-decoration: none;
}

.global-header-nav a:hover,
.global-header-nav a[aria-current="page"] {
  text-decoration: underline;
}

/* -------------------------------------------------------
   Main Content
------------------------------------------------------- */
.main {
  padding-top: var(--gutter);
  padding-bottom: var(--gutter);
  container-type: inline-size;
}


/* -------------------------------------------------------
   Project Header
------------------------------------------------------- */
.project-header {
  margin-bottom: 32px;
}

.project-header h1,
.project-header h2 {
  font-weight: 500;
  display: inline;
}

.project-header .year {
  color: var(--color-muted);
  margin-left: 12px;
}

/* -------------------------------------------------------
   Project Description
------------------------------------------------------- */
.project-description {
  color: #444;
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 40px;
}

/* -------------------------------------------------------
   Filter Bar
------------------------------------------------------- */
.filter-bar {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}

.filter-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--color-muted);
  cursor: pointer;
  text-decoration: none;
}

.filter-btn:hover {
  color: var(--color-text);
}

.filter-btn.active {
  color: var(--color-text);
  text-decoration: underline;
}

/* -------------------------------------------------------
   Project Images
------------------------------------------------------- */
.main > figure {
  margin-bottom: var(--grid-gap);
}

.main figure img,
.main > img {
  width: 100%;
  display: block;
  height: auto;
}

/* Two-column custom element */
two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--grid-gap);
  margin-bottom: var(--grid-gap);
  margin-top: var(--grid-gap);
}

figcaption {
  margin-top: 6px;
  color: var(--color-muted);
}

two-col img {
  width: 100%;
  display: block;
  height: auto;
  margin-bottom: 0;
}

@container (max-width: 700px) {
  two-col {
    grid-template-columns: 1fr;
  }
}

/* -------------------------------------------------------
   Project Links
------------------------------------------------------- */
.project-links {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-links a {
  color: var(--color-muted);
  text-underline-offset: 3px;
}

.project-links a:hover {
  color: var(--color-text);
}

/* -------------------------------------------------------
   Home Grid
------------------------------------------------------- */
.home-grid-item {
  text-decoration: none;
  color: var(--color-text);
  display: block;
  transition: opacity 0.15s ease;
}

.home-grid-item:hover {
  opacity: 0.7;
}

.home-grid-item img {
  width: 100%;
  display: block;
  height: auto;
}

.home-grid-item .item-title {
  display: block;
  margin-top: 8px;
  color: var(--color-text);
}

/* -------------------------------------------------------
   Project Pagination
------------------------------------------------------- */
.project-pagination {
  display: flex;
  flex-direction: column;
  margin-top: var(--gutter);
  padding-top: var(--gutter);
  gap: 0.5em;
}

.pagination-nav-row {
  display: flex;
}

.pagination-prev,
.pagination-home,
.pagination-next {
  text-decoration: none;
  color: var(--color-muted);
}

.pagination-prev,
.pagination-next {
  flex: 1;
}

.pagination-next {
  text-align: right;
}

.pagination-home {
  text-align: center;
  margin-top: 1em;
}

.pagination-prev:hover,
.pagination-home:hover,
.pagination-next:hover {
  color: var(--color-text);
}

/* -------------------------------------------------------
   Footer
------------------------------------------------------- */
.site-footer {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: var(--gutter);
  padding-bottom: var(--gutter);
  color: var(--color-text);
}

.back-to-top {
  position: absolute;
  right: var(--gutter);
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  font: inherit;
  text-decoration: underline;
  padding: 0;
}

/* -------------------------------------------------------
   Lightbox
------------------------------------------------------- */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

#lightbox.active {
  display: flex;
}

.lb-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  display: block;
}

.lb-close,
.lb-prev,
.lb-next {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  padding: 24px;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.15s ease;
}

.lb-close:hover,
.lb-prev:hover,
.lb-next:hover {
  opacity: 1;
}

.lb-close {
  top: 0;
  right: 0;
}

.lb-prev {
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}

.lb-next {
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}

/* -------------------------------------------------------
   Mobile (< 700px)
------------------------------------------------------- */
@media (max-width: 700px) {
  body {
    font-size: 16px;
  }

  .global-header,
  .main,
  .site-footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .global-header {
    padding-bottom: 24px;
  }

  .main {
    padding-top: 24px;
  }


  .back-to-top {
    display: block;
  }
}