/* ============================================
   Tiernan O'Kane — Engineering Portfolio
   Technical / drafting-paper theme
   ============================================ */

:root {
  --bg: #f2efe6;           /* off-white, aged paper */
  --bg-soft: #ece7d9;
  --ink: #171614;           /* near-black ink */
  --ink-soft: #5c584e;
  --line: #cfc9b8;          /* hairline / border tone */
  --line-strong: #171614;
  --stamp: #8a2e1f;         /* muted blueprint/redline stamp accent */
  --radius: 3px;
  --max-width: 880px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "IBM Plex Mono", "Courier New", monospace;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle, rgba(23,22,20,0.07) 1px, transparent 1px);
  background-size: 22px 22px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;

  opacity: 0;
  transform: translateY(10px);
}

body.page-ready {
  transition: opacity 0.32s ease, transform 0.32s ease;
  opacity: 1;
  transform: translateY(0);
}

body.page-leaving {
  transition: opacity 0.18s ease, transform 0.18s ease;
  opacity: 0;
  transform: translateY(-8px);
}

h1, h2, h3 {
  font-family: "Space Mono", "IBM Plex Mono", monospace;
  font-weight: 700;
  letter-spacing: -0.01em;
}

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
}

a:hover {
  color: var(--stamp);
  border-color: var(--stamp);
}

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

/* ---------- Layout containers ---------- */

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-header {
  padding: 22px 0;
  border-bottom: 1px solid var(--line-strong);
}

.page-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: "Space Mono", monospace;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ink);
  letter-spacing: 0.02em;
  border-bottom: none;
}

.brand:hover {
  color: var(--stamp);
}

.back-link {
  font-size: 0.82rem;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  text-transform: lowercase;
  letter-spacing: 0.04em;
}

.back-link:hover {
  color: var(--stamp);
  border-color: var(--stamp);
}

main {
  padding: 64px 0 96px;
}

footer {
  padding: 32px 0;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.78rem;
  border-top: 1px solid var(--line);
  letter-spacing: 0.03em;
}

/* ---------- Corner marks (technical drawing motif) ---------- */

.crossed {
  position: relative;
}

.crossed::before,
.crossed::after {
  content: "+";
  position: absolute;
  font-family: "Space Mono", monospace;
  font-size: 14px;
  color: var(--line);
  line-height: 1;
}

.crossed::before { top: -7px; left: -7px; }
.crossed::after { bottom: -7px; right: -7px; }

/* ---------- Home page (hub) ---------- */

.hero {
  min-height: 82vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-inner {
  max-width: 560px;
  padding: 0 24px;
  position: relative;
}

.hero-eyebrow {
  display: block;
  font-size: 0.72rem;
  text-transform: lowercase;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

.hero-eyebrow::before {
  content: "// ";
  color: var(--stamp);
}

.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 6px;
}

.hero .subtitle {
  color: var(--ink-soft);
  font-size: 1rem;
  margin: 0 0 40px;
  letter-spacing: 0.02em;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
}

.pill-link {
  font-size: 0.82rem;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  background: var(--bg);
  cursor: pointer;
}

.pill-link:hover {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.pill-link.copied {
  background: var(--stamp);
  color: var(--bg);
  border-color: var(--stamp);
}

.nav-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}

.nav-button {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  font-family: "Space Mono", monospace;
  transition: background 0.15s ease, color 0.15s ease, transform 0.12s ease;
}

.nav-button .idx {
  color: var(--stamp);
  font-size: 0.85rem;
}

.nav-button .nav-sub {
  display: block;
  font-weight: 400;
  font-size: 0.78rem;
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink-soft);
  margin-top: 4px;
  letter-spacing: 0;
}

.nav-button:hover {
  background: var(--ink);
  color: var(--bg);
  transform: translateX(2px);
}

.nav-button:hover .idx,
.nav-button:hover .nav-sub {
  color: var(--bg-soft);
}

/* ---------- Category pages ---------- */

.category-header {
  text-align: center;
  margin-bottom: 56px;
}

.category-header .hero-eyebrow {
  text-align: center;
}

.category-header h1 {
  font-size: 1.9rem;
  margin: 0 0 10px;
}

.category-header p {
  color: var(--ink-soft);
  max-width: 520px;
  margin: 0 auto;
  font-size: 0.9rem;
}

.project-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.project-card {
  display: flex;
  gap: 20px;
  align-items: stretch;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.project-card:hover {
  transform: translateX(3px);
  box-shadow: -3px 3px 0 var(--ink);
}

.project-card .thumb {
  flex: 0 0 220px;
  height: 160px;
  overflow: hidden;
  background: var(--bg-soft);
  filter: grayscale(15%);
}

.project-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card .card-body {
  padding: 18px 22px 18px 4px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.project-card h2 {
  font-size: 1.05rem;
  margin: 0 0 6px;
  font-weight: 700;
}

.project-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.tag {
  display: inline-block;
  font-family: "Space Mono", monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--stamp);
  margin-bottom: 8px;
  font-weight: 700;
}

.tag::before {
  content: "[ ";
}
.tag::after {
  content: " ]";
}

/* ---------- Project detail pages ---------- */

.project-hero {
  margin-bottom: 40px;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 32px;
}

.project-hero h1 {
  font-size: 1.7rem;
  margin: 0 0 14px;
  line-height: 1.3;
}

.project-hero .meta {
  color: var(--ink-soft);
  font-size: 0.78rem;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.project-hero .description {
  font-size: 0.92rem;
  color: var(--ink);
  max-width: 720px;
}

.project-hero .description p {
  margin: 0 0 14px;
}

.media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px 20px;
  margin: 32px 0;
}

.media-item.full {
  grid-column: 1 / -1;
}

.media-item img,
.media-item video {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: var(--bg-soft);
}

.caption {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin: 8px 8px 12px;
  text-align: center;
}

@media (min-width: 641px) {
  .media-item {
    height: auto;
  }

  .media-item img,
  .media-item video {
    height: 300px;
    object-fit: cover;
  }

  .media-item.full img,
  .media-item.full video {
    height: 420px;
  }

  .media-item video {
    object-fit: contain;
    background: var(--ink);
  }
}

@media (max-width: 640px) {
  .media-grid {
    grid-template-columns: 1fr;
  }

  .media-item {
    height: auto;
  }

  .media-item img,
  .media-item video {
    height: auto;
  }
}

.caption::before {
  content: "fig. — ";
  color: var(--stamp);
}

.doc-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.doc-links h3 {
  font-size: 0.82rem;
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.doc-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.doc-links a {
  font-size: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.doc-links a::before {
  content: "↓ ";
  color: var(--stamp);
}

.project-nav {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line-strong);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ---------- Resume page ---------- */

.resume-header {
  text-align: center;
  margin-bottom: 28px;
}

.resume-header h1 {
  font-size: 1.9rem;
  margin: 0;
}

.resume-viewer {
  width: 100%;
  height: min(82vh, 1100px);
  min-height: 600px;
  border: 1px solid var(--line-strong);
  background: var(--bg-soft);
}

.resume-viewer iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.resume-source {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.9rem;
  }

  .project-card {
    flex-direction: column;
  }

  .project-card .thumb {
    flex: none;
    width: 100%;
    height: 180px;
  }

  .project-card .card-body {
    padding: 16px 18px 20px;
  }
}

@media (max-width: 640px) {
  .resume-viewer {
    height: 75vh;
    min-height: 520px;
  }
}