/* ============================================
   CSS CUSTOM PROPERTIES
   Single source of truth for design tokens.
   ============================================ */
:root {
  --color-bg: #1a1a1a;
  --color-bg-transparent: #1a1a1a00;
  --color-text: #e6e6e6;
  --color-text-ghost: #e6e6e610;
  --color-accent: #e50000;
  --color-border: #e6e6e650;
  --font-display: "Instrument Serif", serif;
  --font-body: "Barlow", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
}

/* ============================================
   GLOBAL BASE
   ============================================ */
* {
  box-sizing: border-box;
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 140%;
  color: var(--color-text);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-bg);
}

main {
  display: flex;
  padding: 0 var(--space-md) var(--space-md) var(--space-md);
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  align-self: stretch;
}

h1 {
  font-family: var(--font-display);
  font-size: 6em;
  line-height: 90%;
  letter-spacing: -2px;
  text-align: center;
  margin: 0;
}

a:hover {
  color: var(--color-accent);
}

/* ============================================
   NAVIGATION
   ============================================ */
.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 700;
  z-index: 100;
  transition: top 0.1s;
}

.skip-link:focus {
  top: var(--space-sm);
}

.nav {
  display: flex;
  width: 100vw;
  padding: var(--space-sm);
  justify-content: space-between;
  align-items: center;
  position: fixed;
  z-index: 10;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-transparent) 100%);
  backdrop-filter: blur(2.5px);
}

.nav-ul {
  display: flex;
  justify-content: flex-end;
  align-items: flex-start;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--color-text);
}

.nav-li {
  background-color: var(--color-bg);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
}

.nav-li a {
  text-decoration: none;
}

.nav-li a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.logo {
  width: 4rem;
  flex-shrink: 0;
  aspect-ratio: 1/1;
  mix-blend-mode: difference;
}

/* ============================================
   LAYOUT
   ============================================ */
header {
  display: flex;
  flex-direction: column;
  align-items: center;
  align-self: stretch;
}

.cover {
  display: flex;
  padding: var(--space-md);
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  align-self: stretch;
  height: 80vh;
}

.cover img {
  max-width: 30rem;
}

.pj-deets {
  display: flex;
  max-width: 30rem;
  padding: var(--space-md);
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
}

.pj-title {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-self: stretch;
}

section {
  display: flex;
  padding: var(--space-md);
  gap: var(--space-sm);
  flex-direction: column;
  align-items: center;
  align-self: stretch;
}

section img {
  max-width: 100%;
  align-self: stretch;
}

/* ============================================
   TABLES
   ============================================ */
th,
td {
  border-top: var(--color-border) solid 1px;
  text-align: left;
  padding-top: var(--space-xs);
  padding-bottom: var(--space-sm);
  padding-right: var(--space-md);
}

/* ============================================
   PROJECT COMPONENTS
   ============================================ */
.pj-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  align-self: stretch;
  gap: var(--space-sm);
}

.pj-row {
  display: grid;
  gap: var(--space-sm);
  /* Activates masonry-style layout */
  grid-template-rows: min-content;
  /* Responsive column behavior */
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.pj-reel {
  display: grid;
  gap: var(--space-sm);
  grid-auto-flow: column;
  grid-auto-columns: 20%;
  overflow-x: scroll;
  scroll-snap-type: x mandatory;
  padding: var(--space-sm);
}

.pj-reel > * {
  scroll-snap-align: start;
  justify-self: stretch;
  gap: var(--space-sm);
}

/* ============================================
   UTILITY
   ============================================ */
.grid_layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1em;
}

/* ============================================
   EDITORIAL LABELS
   Small uppercase category tag above headings.
   Usage: <span class="label">Editorial Design</span>
          <span class="label label--muted">2024</span>
   ============================================ */
.label {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-xs);
}

.label--muted {
  color: var(--color-text);
  opacity: 0.4;
}

/* ============================================
   PULL QUOTES
   Large Instrument Serif italic quote.
   Usage: <blockquote class="pull-quote">
            Text here
            <cite>— Source</cite>
          </blockquote>
   ============================================ */
.pull-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-style: italic;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: var(--space-md) 0;
  padding-left: var(--space-md);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text);
  max-width: 36ch;
}

.pull-quote cite {
  display: block;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: var(--space-xs);
  color: var(--color-text);
  opacity: 0.5;
}

/* ============================================
   EXPANDABLE SECTIONS (details/summary)
   Native HTML, zero JavaScript required.
   Usage:
   <details class="expandable">
     <summary class="expandable__trigger">Process</summary>
     <div class="expandable__body"> ... </div>
   </details>
   ============================================ */
.expandable {
  border-top: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

.expandable:last-child {
  border-bottom: 1px solid var(--color-border);
}

.expandable__trigger {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) 0;
  color: var(--color-text);
}

.expandable__trigger::-webkit-details-marker {
  display: none;
}

.expandable__trigger::after {
  content: "+";
  font-weight: 300;
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}

details[open] .expandable__trigger::after {
  content: "−";
}

.expandable__body {
  padding: var(--space-md) 0;
}

/* ============================================
   ARTICLE BODY TYPOGRAPHY
   For long-form prose in case studies.
   Usage: <div class="article-body"> ... </div>
   ============================================ */
.article-body {
  max-width: 65ch;
  margin: 0 auto;
}

.article-body p {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  margin-bottom: 1.25em;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.article-body h3 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
  opacity: 0.6;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 768px) {
  h1 {
    font-size: 3.5em;
    letter-spacing: -1px;
  }

  .pj-reel {
    grid-auto-columns: 80%;
  }

  .pull-quote {
    padding-left: var(--space-sm);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2.5em;
  }
}