/* ============================================================
   TOKENS
   Palette:  --blueprint   #0B2545  (deep drawing-board blue, bg)
             --blueprint-2 #123B6B  (grid lines / card fill)
             --ink          #EAF2FF (primary text, "chalk" white)
             --ink-dim      #9FB6D9 (secondary text)
             --line         #4FD1FF (cyan drafting line)
             --amber        #FFB454 (highlighter accent / CTA)
   Type:     Display -> 'Space Grotesk'   (technical, geometric)
             Body    -> 'IBM Plex Sans'   (clean, engineering-doc body)
             Mono    -> 'JetBrains Mono'  (labels, dimensions, data)
   ============================================================ */

:root {
  --blueprint: #0B2545;
  --blueprint-2: #123B6B;
  --blueprint-3: #163F73;
  --ink: #EAF2FF;
  --ink-dim: #93ABCE;
  --line: #57D6FF;
  --amber: #FFB454;
  --paper: #F3F0E6;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-w: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--blueprint);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--line); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* ============ NAV ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 37, 69, 0.88);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(87, 214, 255, 0.25);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-mark {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.nav-links { display: flex; gap: 28px; }

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--ink-dim);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.15s ease;
}

.nav-links a:hover { color: var(--line); }

/* ============ HERO ============ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 24px 40px;
  border-bottom: 1px solid rgba(87, 214, 255, 0.2);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(87, 214, 255, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(87, 214, 255, 0.09) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at top, black 40%, transparent 85%);
}

.hero-inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-inner--split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-text { flex: 1 1 420px; }

.hero-photo-wrap {
  position: relative;
  flex: 0 0 auto;
}

.hero-photo {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
  box-shadow: 0 0 0 8px rgba(87, 214, 255, 0.06);
  display: block;
}

.hero-photo-tag {
  position: absolute;
  bottom: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blueprint);
  border: 1px solid rgba(87, 214, 255, 0.4);
  border-radius: 999px;
  padding: 5px 14px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--amber);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .hero-inner--split { flex-direction: column; align-items: flex-start; }
  .hero-photo { width: 160px; height: 160px; }
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--line);
  margin: 0 0 18px;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.2rem, 10vw, 7rem);
  line-height: 0.92;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  color: var(--ink-dim);
  max-width: 34ch;
  margin: 0;
}

.hero-diagram {
  position: relative;
  display: block;
  width: 100%;
  max-width: var(--max-w);
  margin: 56px auto 0;
  height: auto;
}

.dim-line, .dim-tick, .dim-guide { stroke: var(--ink-dim); stroke-width: 1.5; }
.dim-guide { stroke-dasharray: 4 4; opacity: 0.6; }
.dim-arc { stroke: var(--amber); stroke-width: 1.5; }
.dim-label { font-family: var(--font-mono); font-size: 13px; fill: var(--ink-dim); }
.dim-label.small { font-size: 16px; fill: var(--amber); }

.cart { fill: var(--blueprint-3); stroke: var(--line); stroke-width: 2; }
.wheel { fill: var(--blueprint); stroke: var(--line); stroke-width: 2; }
.pendulum-rod { stroke: var(--line); stroke-width: 3; stroke-linecap: round; }
.pendulum-bob { fill: var(--amber); }

/* ============ SECTIONS ============ */
.section { padding: 88px 24px; border-bottom: 1px solid rgba(87, 214, 255, 0.15); }
.section-inner { max-width: var(--max-w); margin: 0 auto; }

.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--amber);
  margin: 0 0 14px;
}

.section-lede {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  font-weight: 500;
  color: var(--ink);
  max-width: 46ch;
  margin: 0 0 40px;
}

/* ============ ABOUT ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text {
  font-size: 1.1rem;
  color: var(--ink-dim);
  max-width: 52ch;
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 10px; }

.tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  padding: 8px 14px;
  border: 1px solid rgba(87, 214, 255, 0.4);
  border-radius: 999px;
  color: var(--line);
  white-space: nowrap;
}

/* ============ WORK ============ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.work-card {
  background: var(--blueprint-2);
  border: 1px solid rgba(87, 214, 255, 0.25);
  border-radius: 4px;
  padding: 32px;
  position: relative;
}

.work-check { font-size: 1.3rem; }

.work-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 14px 0 10px;
}

.work-card p { color: var(--ink-dim); margin: 0; font-size: 0.98rem; }

/* ============ PORTFOLIO ============ */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--blueprint-2);
  border: 1px solid rgba(87, 214, 255, 0.25);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-image {
  aspect-ratio: 4 / 3;
  background: var(--blueprint-3);
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-body { padding: 22px; display: flex; flex-direction: column; gap: 8px; flex: 1; }

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.project-body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0;
}

.project-body p {
  color: var(--ink-dim);
  font-size: 0.92rem;
  flex: 1;
  margin: 0;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--line);
  margin-top: 4px;
}

.project-link:hover { color: var(--amber); }

/* ============ CONTACT ============ */
.contact-table {
  border-collapse: collapse;
  width: 100%;
  max-width: 520px;
}

.contact-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(87, 214, 255, 0.18);
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.contact-table .icon { width: 40px; font-size: 1.1rem; }

.contact-table a { text-decoration: none; }
.contact-table a:hover { color: var(--amber); }

/* ============ TITLE BLOCK / FOOTER ============ */
.titleblock {
  background: var(--paper);
  color: var(--blueprint);
  padding: 0 24px;
}

.titleblock-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.tb-cell {
  padding: 20px 22px;
  border-left: 1px solid rgba(11, 37, 69, 0.2);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tb-cell:first-child { border-left: none; }

.tb-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: rgba(11, 37, 69, 0.6);
}

.tb-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}

/* ============ PROJECT DETAIL PAGE ============ */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink-dim);
  margin-bottom: 28px;
  transition: color 0.15s ease;
}

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

.project-hero {
  position: relative;
  overflow: hidden;
  padding: 64px 24px 56px;
  border-bottom: 1px solid rgba(87, 214, 255, 0.2);
}

.project-hero-inner {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
}

.project-hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.02;
  margin: 8px 0 18px;
  letter-spacing: -0.01em;
}

.project-hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--ink-dim);
  max-width: 56ch;
  margin: 0;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(87, 214, 255, 0.18);
}

.meta-item { display: flex; flex-direction: column; gap: 4px; }

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.meta-value {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--ink);
}

.project-figure {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 24px 0;
}

.project-figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(87, 214, 255, 0.25);
  border-radius: 4px;
}

/* Results GIF and caption styling */
.results-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin: 18px auto 0;
  gap: 8px;
}

.results-figure img {
  max-width: 720px;
  width: 80%;
  height: auto;
  display: block;
  border: 1px solid rgba(87, 214, 255, 0.25);
  border-radius: 4px;
}

.results-figure figcaption {
  color: rgba(234, 242, 255, 0.72);
  font-size: 0.95rem;
  font-style: italic;
  max-width: 66ch;
  margin: 0;
}

.project-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 24px 96px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
}

.project-toc {
  position: sticky;
  top: 90px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-toc a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink-dim);
}

.project-toc a:hover { color: var(--line); }

.content-section { margin-bottom: 48px; }
.content-section:last-child { margin-bottom: 0; }

.content-section h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(87, 214, 255, 0.18);
}

.content-section p {
  color: var(--ink-dim);
  font-size: 1.02rem;
  max-width: 66ch;
  margin: 0 0 14px;
}

.content-section ul {
  color: var(--ink-dim);
  font-size: 1.02rem;
  max-width: 66ch;
  padding-left: 20px;
  margin: 0;
}

.content-section li { margin-bottom: 8px; }

.project-nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 96px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.project-nav a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--line);
  border: 1px solid rgba(87, 214, 255, 0.3);
  border-radius: 4px;
  padding: 12px 20px;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.project-nav a:hover { border-color: var(--amber); color: var(--amber); }

@media (max-width: 760px) {
  .project-content { grid-template-columns: 1fr; }
  .project-toc { position: static; flex-direction: row; flex-wrap: wrap; }
}

/* ============ RESPONSIVE ============ */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .titleblock-inner { grid-template-columns: repeat(2, 1fr); }
  .tb-cell:nth-child(3) { border-left: none; }
}

@media (max-width: 560px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 0.72rem; }
  .titleblock-inner { grid-template-columns: 1fr; }
  .tb-cell { border-left: none; border-top: 1px solid rgba(11, 37, 69, 0.2); }
  .tb-cell:first-child { border-top: none; }
}

/* ============ EXPERIENCE PAGE ACCENT ============ */
.experience-hero .eyebrow { color: var(--amber); }
.experience-page .project-figure img { border-color: rgba(255, 180, 84, 0.25); }