/* ================================================================
   Variables & Reset
   ================================================================ */
:root {
  --bg:       #1E1E2E;
  --surface:  #2A2A3E;
  --text:     #EEEEF2;
  --muted:    #8888AA;
  --accent:   #FF5500;
  --border:   #3A3A5A;
  --dark:     #13131F;
  --dark-2:   #0F0F1A;
  --font:     'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --max:      1020px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ================================================================
   Inner Page — Shared Header
   ================================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(30,30,46,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-logo:hover { color: var(--accent); }

.site-nav {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.site-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s;
  letter-spacing: 0.01em;
}

.site-nav a:hover,
.site-nav a.active { color: var(--text); }

.site-nav a.active {
  font-weight: 700;
  color: var(--accent);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: var(--surface);
  border-top: 1px solid transparent;
}
.nav-drawer.open { max-height: 300px; border-top-color: var(--border); }
.nav-drawer ul { padding: 1.25rem 2rem; display: flex; flex-direction: column; gap: 1rem; }
.nav-drawer a { font-size: 1rem; font-weight: 500; color: var(--muted); }
.nav-drawer a:hover, .nav-drawer a.active { color: var(--accent); font-weight: 700; }

/* ================================================================
   Homepage
   ================================================================ */
.home-wrap {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

/* Home top bar */
.home-bar {
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.home-bar-logo {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
}

.home-bar-right {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* Hero */
.home-hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem 2rem 2rem;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-name {
  font-size: clamp(3.8rem, 10vw, 8.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--muted);
  font-weight: 400;
  max-width: 480px;
  line-height: 1.75;
  margin-bottom: 3rem;
}

/* Navigation cards on homepage */
.home-nav {
  border-top: 1px solid var(--border);
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.home-nav-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.4rem 2rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease, padding-left 0.25s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.home-nav-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--dark);
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.home-nav-item:hover::before { transform: translateX(0); }
.home-nav-item > * { position: relative; z-index: 1; }

.home-nav-item:hover .nav-item-num,
.home-nav-item:hover .nav-item-title,
.home-nav-item:hover .nav-item-desc,
.home-nav-item:hover .nav-item-arrow {
  color: #EEEEF2;
}

.home-nav-item:hover .nav-item-num { color: var(--accent); }

.nav-item-num {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.06em;
  width: 28px;
  flex-shrink: 0;
  transition: color 0.25s;
}

.nav-item-title {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color 0.25s;
  flex: 1;
}

.nav-item-desc {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 400;
  text-align: right;
  flex: 1;
  transition: color 0.25s;
}

.nav-item-arrow {
  font-size: 1.2rem;
  color: var(--muted);
  transition: color 0.25s, transform 0.25s;
  flex-shrink: 0;
}

.home-nav-item:hover .nav-item-arrow { transform: translateX(4px); }

/* Home footer */
.home-footer {
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.home-footer-socials {
  display: flex;
  gap: 1.5rem;
}

.home-footer-socials a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.home-footer-socials a:hover { color: var(--text); border-bottom-color: var(--text); }

.home-footer-copy {
  font-size: 0.78rem;
  color: var(--muted);
}

/* ================================================================
   Inner Page Layout
   ================================================================ */
.page-main {
  padding: 4rem 0 6rem;
}

.page-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.page-title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.page-lead {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 580px;
  margin-bottom: 4rem;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 3rem 0;
}

/* ================================================================
   About Page
   ================================================================ */
.about-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 1.25rem;
}

.about-text p:last-child { margin-bottom: 0; }

.about-skills-section { }

.skill-group {
  margin-bottom: 2.5rem;
}

.skill-group-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.9rem;
  display: block;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.skill-list span {
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  transition: border-color 0.2s, color 0.2s;
}

.skill-list span:hover { border-color: var(--accent); color: var(--accent); }

/* ================================================================
   Experience Page
   ================================================================ */
.timeline { display: flex; flex-direction: column; }

.exp-item {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 3rem;
  padding: 2.75rem 0;
  border-top: 1px solid var(--border);
}

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

.exp-meta { padding-top: 0.2rem; }

.exp-date {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.03em;
  margin-bottom: 0.3rem;
}

.exp-place {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.5;
}

.exp-role {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.exp-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.18rem 0.55rem;
  border-radius: 20px;
  background: rgba(255,85,0,0.15);
  color: var(--accent);
  letter-spacing: 0.04em;
}

.exp-company {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 1.1rem;
}

.exp-bullets { display: flex; flex-direction: column; gap: 0.5rem; }

.exp-bullets li {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.75;
  padding-left: 1.2rem;
  position: relative;
}

.exp-bullets li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
}

/* ================================================================
   Projects Page
   ================================================================ */
.projects-list { display: flex; flex-direction: column; gap: 0; }

.project-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 3rem;
  padding: 2.75rem 0;
  border-top: 1px solid var(--border);
  transition: background 0.2s;
  position: relative;
}

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

.project-num {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: block;
}

.project-name {
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
  line-height: 1.2;
  color: var(--text);
}

.project-desc {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 580px;
  margin-bottom: 1.25rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-tags span {
  font-size: 0.73rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  background: rgba(255,85,0,0.15);
  color: var(--accent);
  letter-spacing: 0.03em;
}

.project-link-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 1rem;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.project-item:hover .project-link-icon {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ================================================================
   Contact Page
   ================================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-text p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 1.25rem;
}

.contact-links-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s, background 0.2s;
}

.contact-link-item:hover {
  border-color: var(--accent);
  background: #FFF9F6;
}

.contact-link-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.contact-link-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

/* ================================================================
   Shared Footer (inner pages)
   ================================================================ */
.site-footer {
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-footer p { font-size: 0.8rem; color: var(--muted); }

.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  font-size: 0.8rem;
  color: var(--muted);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text); }

/* ================================================================
   Buttons
   ================================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: 7px;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font);
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-dark {
  background: var(--dark);
  color: var(--bg);
}
.btn-dark:hover { background: var(--accent); transform: translateY(-2px); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { border-color: var(--text); transform: translateY(-2px); }

/* ================================================================
   Reveal Animation
   ================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ================================================================
   Responsive
   ================================================================ */
@media (max-width: 768px) {
  .site-nav { display: none; }
  .nav-toggle { display: flex; }

  .nav-item-desc { display: none; }

  .about-body,
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }

  .exp-item { grid-template-columns: 1fr; gap: 0.75rem; }

  .project-item,
  .project-item--arch { grid-template-columns: 1fr; }
  .project-link-icon { position: absolute; top: 2.75rem; right: 0; }

  /* Collapse arch diagram card on mobile */
  .project-item--arch .arch-card { display: none; }

  /* Currently working: tighter padding */
  .currently-working { padding: 1.75rem 1.5rem; }

  /* Extras row: stack vertically */
  .projects-extras { flex-direction: column; }

  .site-footer .container { flex-direction: column; gap: 0.75rem; text-align: center; }

  .home-nav-item { padding: 1.25rem 1.5rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .home-bar, .home-hero, .home-nav-item { padding-left: 1.25rem; padding-right: 1.25rem; }
  .home-footer { padding-left: 1.25rem; padding-right: 1.25rem; }

  .page-title { font-size: 2rem; }
  .page-lead { font-size: 0.95rem; }

  .exp-item { padding: 2rem 0; }
  .exp-role { font-size: 1rem; }

  .project-item { padding: 2rem 0; }
  .project-name { font-size: 1.2rem; }

  .currently-working { padding: 1.5rem 1.25rem; }
  .cw-heading { font-size: 1.4rem; }
}

/* ── CURRENTLY WORKING ON (projects page) ──────────── */
.currently-working {
  margin-top: 4rem;
  padding: 2.5rem 3rem;
  background: #FFFDE0;
  border-radius: 6px;
  border-left: 4px solid #F5D000;
  max-width: 700px;
  min-height: 180px;
  position: relative;
}

.currently-working::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 2.5rem;
  width: 56px;
  height: 18px;
  background: rgba(255,255,200,0.75);
  border-radius: 3px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.cw-heading {
  font-family: 'Caveat', cursive;
  font-size: 1.6rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 1rem;
}

.cw-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.cw-list li {
  font-size: 0.9rem;
  font-weight: 500;
  color: #444;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.5;
}

.cw-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: #999;
  font-size: 0.85rem;
}

/* ── PROJECTS EXTRAS ROW ────────────────────────── */
.projects-extras {
  margin-top: 4rem;
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

/* Architecture card */
.arch-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
  min-width: 160px;
}

.arch-title {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.8rem;
}
.arch-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.arch-node {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.35rem 0.65rem;
  text-align: center;
}
.arch-arrow {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
}
.arch-badge {
  margin-top: 0.7rem;
  font-size: 0.6rem;
  color: var(--accent);
  font-weight: 600;
  text-align: center;
  letter-spacing: 0.06em;
}

/* Engineering notebook */
.eng-notebook {
  background: #FFFEF5;
  border-radius: 4px 8px 8px 4px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.07), inset 3px 0 0 #E8C4C4;
  min-width: 200px;
}
.eng-notebook .nb-header {
  background: #F5E6E6;
  padding: 0.4rem 0.8rem 0.4rem 1rem;
  font-size: 0.65rem;
  font-weight: 700;
  color: #A55;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.eng-notebook .nb-body {
  padding: 0.6rem 0.8rem 0.7rem 1rem;
  background-image: repeating-linear-gradient(
    transparent, transparent 20px,
    rgba(0,0,180,0.05) 20px, rgba(0,0,180,0.05) 21px
  );
}
.nb-line {
  font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.75rem;
  color: #444;
  line-height: 20px;
}
.nb-comment { color: #999; }
.nb-key     { color: #A55; }
.nb-val     { color: #2A6; }
.nb-str     { color: #D08; }

/* ── VISUALDATA PROJECT — arch card inline ──────── */
.project-item--arch {
  grid-template-columns: 1fr auto auto;
  align-items: start;
  gap: 2rem;
}

.project-item--arch .arch-card {
  align-self: center;
  min-width: 155px;
}