/* ==========================================================================
   SHIVA SHARUK KUMAR — ENGINEERING PORTFOLIO
   Design language: "Schematic" — blueprint grid, copper/solder accent,
   cyan signal-trace accent, datasheet-style numbered sections & mono labels.
   ========================================================================== */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ---------- Tokens ---------- */
:root {
  /* Dark (default) */
  --bg: #0a0d13;
  --bg-raised: #0f131b;
  --panel: rgba(233, 238, 246, 0.035);
  --panel-strong: rgba(233, 238, 246, 0.06);
  --border: rgba(233, 238, 246, 0.10);
  --border-strong: rgba(233, 238, 246, 0.18);
  --text: #e9eef6;
  --text-dim: #9aa5b8;
  --text-faint: #616c80;

  --copper: #c8793e;
  --copper-bright: #e8a565;
  --cyan: #5eead4;
  --cyan-dim: #3ba597;
  --danger: #e8636b;

  --grid-line: rgba(233, 238, 246, 0.04);
  --grid-line-strong: rgba(233, 238, 246, 0.07);
  --wash-a: rgba(200, 121, 62, 0.07);
  --wash-b: rgba(94, 234, 212, 0.05);
  --decor-opacity: 0.22;
  --noise-opacity: 0.025;
  --noise-blend: overlay;

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

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-soft: 0 20px 60px -20px rgba(0,0,0,0.55);
  --ease: cubic-bezier(.16,.84,.44,1);

  --nav-h: 76px;
}

html[data-theme="light"] {
  --bg: #f3efe7;
  --bg-raised: #fffdf9;
  --panel: rgba(35, 28, 18, 0.03);
  --panel-strong: rgba(35, 28, 18, 0.055);
  --border: rgba(35, 28, 18, 0.11);
  --border-strong: rgba(35, 28, 18, 0.22);
  --text: #211c15;
  --text-dim: #5b5346;
  --text-faint: #8c8375;

  --copper: #a85c26;
  --copper-bright: #b8681f;
  --cyan: #147d72;
  --cyan-dim: #0f6259;
  --danger: #c53c46;

  --grid-line: rgba(35, 28, 18, 0.055);
  --grid-line-strong: rgba(35, 28, 18, 0.09);
  --wash-a: rgba(184, 104, 31, 0.055);
  --wash-b: rgba(20, 125, 114, 0.045);
  --decor-opacity: 0.14;
  --noise-opacity: 0.018;
  --noise-blend: multiply;

  --shadow-soft: 0 20px 50px -25px rgba(60, 45, 25, 0.28);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .3s var(--ease), color .3s var(--ease);
  overflow-x: hidden;
}

/* Layer 1: blueprint grid, fixed behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(var(--grid-line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-strong) 1px, transparent 1px);
  background-size: 42px 42px, 42px 42px, 210px 210px, 210px 210px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
  transition: background .3s var(--ease);
  pointer-events: none;
}

/* Layer 2: soft color wash mesh — distinct per theme via --wash-a/--wash-b */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(ellipse 900px 560px at 12% -8%, var(--wash-a), transparent 62%),
    radial-gradient(ellipse 760px 560px at 104% 12%, var(--wash-b), transparent 60%),
    radial-gradient(ellipse 700px 500px at 50% 118%, var(--wash-a), transparent 65%);
  transition: background .3s var(--ease);
  pointer-events: none;
}

/* Layer 3: large fixed schematic compass/rings — the site's signature backdrop motif */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  opacity: var(--decor-opacity);
  transition: opacity .3s var(--ease);
}
.bg-decor svg {
  position: absolute;
  top: 50%;
  right: -12vw;
  transform: translateY(-50%);
  width: min(80vw, 900px);
  height: min(80vw, 900px);
}
.bg-decor .ring { fill: none; stroke: var(--border-strong); stroke-width: 1; }
.bg-decor .ring.accent-copper { stroke: var(--copper); opacity: .55; }
.bg-decor .ring.accent-cyan { stroke: var(--cyan); opacity: .4; }
.bg-decor .tick { stroke: var(--border-strong); stroke-width: 1; }
.bg-decor .crosshair { stroke: var(--border-strong); stroke-width: 1; }

/* Layer 4: subtle grain for a tactile, non-flat surface (kept very low opacity) */
body .grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: var(--noise-opacity);
  mix-blend-mode: var(--noise-blend);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 140px 140px;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4 { font-family: var(--font-display); margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.mono { font-family: var(--font-mono); }

/* ---------- Section scaffolding (datasheet style) ---------- */
.section {
  position: relative;
  padding: 130px 0 100px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 93%, transparent);
}
.section:first-of-type { border-top: none; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 56px;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--copper-bright);
  letter-spacing: 0.08em;
  white-space: nowrap;
  padding-top: 6px;
}
.section-titles h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
}
.section-titles .section-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 10px;
}
.section-lede {
  max-width: 640px;
  color: var(--text-dim);
  font-size: 16px;
  margin-top: 14px;
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Glass panel / card ---------- */
.glass {
  background: linear-gradient(160deg, var(--panel-strong), var(--panel));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--copper-bright), var(--copper));
  color: #14100a;
  box-shadow: 0 8px 24px -8px rgba(200,121,62,0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -8px rgba(200,121,62,0.65); }

.btn-ghost {
  background: var(--panel);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }

.btn-sm { padding: 9px 14px; font-size: 13px; border-radius: 8px; }
.btn-block { width: 100%; justify-content: center; }
.btn[disabled], .btn.is-disabled { opacity: .45; pointer-events: none; }

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s var(--ease);
}
.navbar.is-scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav-inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--copper-bright), var(--copper));
  color: #14100a;
  font-size: 13px;
  font-weight: 700;
}
.brand-name-full { color: var(--text); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  position: relative;
  padding: 6px 0;
  transition: color .2s var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--cyan);
  transition: width .25s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  display: grid; place-items: center;
  color: var(--text);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.theme-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.theme-toggle svg { width: 18px; height: 18px; }
html[data-theme="light"] .icon-moon { display: none; }
html:not([data-theme="light"]) .icon-sun { display: none; }

.hamburger {
  display: none;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  position: relative;
}
.hamburger span, .hamburger span::before, .hamburger span::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px;
  height: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease), top .3s var(--ease);
}
.hamburger span { top: 19px; }
.hamburger span::before { top: -7px; }
.hamburger span::after { top: 7px; }
.hamburger.is-open span { background: transparent; }
.hamburger.is-open span::before { top: 0; transform: rotate(45deg); background: var(--text); }
.hamburger.is-open span::after { top: 0; transform: rotate(-45deg); background: var(--text); }

.mobile-menu {
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  z-index: 499;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  padding: 10px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: transform .28s var(--ease), opacity .28s var(--ease);
}
.mobile-menu.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu a {
  padding: 13px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  color: var(--text-dim);
  font-weight: 500;
}
.mobile-menu a:last-child { border-bottom: none; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}
.hero-inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 22px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
}

.hero-name {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
}
.hero-name .accent { color: var(--copper-bright); }

.hero-role {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.5vw, 15px);
  color: var(--text-dim);
  line-height: 1.9;
}
.hero-role .sep { color: var(--copper-bright); margin: 0 8px; }

.hero-desc {
  margin-top: 24px;
  max-width: 540px;
  font-size: 17px;
  color: var(--text-dim);
}

.hero-actions {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-social {
  margin-top: 40px;
  display: flex;
  gap: 14px;
}
.social-btn {
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  display: grid; place-items: center;
  transition: border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
  color: var(--text-dim);
}
.social-btn svg { width: 19px; height: 19px; }
.social-btn:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-3px); }

/* Hero visual: schematic portrait frame + animated circuit traces */
.hero-visual {
  position: relative;
  aspect-ratio: 1/1;
  max-width: 420px;
  margin: 0 auto;
}
.hero-visual svg.traces {
  position: absolute;
  inset: -18%;
  width: 136%;
  height: 136%;
  z-index: 0;
  opacity: 0.9;
}
.trace-path {
  fill: none;
  stroke: var(--cyan-dim);
  stroke-width: 1.4;
  stroke-dasharray: 6 6;
  opacity: 0.55;
}
.trace-path.copper { stroke: var(--copper); opacity: .5; }
.trace-node {
  fill: var(--bg);
  stroke: var(--cyan);
  stroke-width: 1.6;
  animation: node-glow 3s ease-in-out infinite;
}
@keyframes node-glow { 0%,100%{ opacity:.55 } 50%{ opacity:1 } }

.portrait-frame {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: 28px;
  border: 1px solid var(--border-strong);
  background: linear-gradient(160deg, var(--panel-strong), var(--panel));
  backdrop-filter: blur(10px);
  display: grid;
  place-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.portrait-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-faint);
  text-align: center;
  padding: 20px;
}
.portrait-placeholder svg { width: 64px; height: 64px; color: var(--text-faint); }
.portrait-placeholder span { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.06em; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }

.corner-tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  z-index: 2;
  background: var(--bg);
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.corner-tag.tl { top: -12px; left: 18px; }
.corner-tag.br { bottom: -12px; right: 18px; }

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  text-transform: uppercase;
}
.scroll-cue .line {
  width: 1px; height: 34px;
  background: linear-gradient(var(--text-faint), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}
@keyframes scroll-line { 0%{ transform: scaleY(0); transform-origin: top } 50%{ transform: scaleY(1); transform-origin: top } 50.01%{ transform-origin: bottom } 100%{ transform: scaleY(0); transform-origin: bottom } }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.about-text p { color: var(--text-dim); font-size: 16px; }
.about-text p + p { margin-top: 16px; }

.interest-tags {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.interest-tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  transition: border-color .2s, color .2s;
}
.interest-tag:hover { border-color: var(--copper-bright); color: var(--copper-bright); }

/* Timeline */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 1px;
  background: linear-gradient(var(--copper), var(--cyan-dim));
  opacity: .5;
}
.timeline-item { position: relative; padding-bottom: 34px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -30px; top: 4px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--copper-bright);
}
.timeline-item.type-experience::before { border-color: var(--cyan); }
.timeline-period {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.timeline-title { font-family: var(--font-display); font-size: 18px; font-weight: 600; margin-top: 4px; }
.timeline-org { color: var(--copper-bright); font-size: 13.5px; font-weight: 500; margin-top: 2px; }
.timeline-desc { color: var(--text-dim); font-size: 14.5px; margin-top: 8px; }
.timeline-highlights {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.timeline-highlights span {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 9px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* ==========================================================================
   SKILLS
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.skill-card {
  padding: 26px 24px;
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}
.skill-card:hover { border-color: var(--border-strong); transform: translateY(-4px); }
.skill-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.skill-icon {
  width: 38px; height: 38px;
  border-radius: 9px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, rgba(200,121,62,0.18), rgba(94,234,212,0.10));
  border: 1px solid var(--border);
  color: var(--copper-bright);
  flex-shrink: 0;
}
.skill-icon svg { width: 19px; height: 19px; }
.skill-card-head h3 { font-size: 16px; font-weight: 600; }
.skill-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 11px;
  border-radius: 7px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* ==========================================================================
   PROJECTS
   ========================================================================== */
.projects-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-bottom: 34px;
}
.filter-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-chip {
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text-dim);
  transition: all .2s var(--ease);
}
.filter-chip:hover { color: var(--text); border-color: var(--border-strong); }
.filter-chip.active {
  background: linear-gradient(135deg, var(--copper-bright), var(--copper));
  color: #14100a;
  border-color: transparent;
  font-weight: 600;
}

.search-box {
  position: relative;
  min-width: 230px;
}
.search-box input {
  width: 100%;
  padding: 11px 14px 11px 38px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color .2s var(--ease);
}
.search-box input:focus { border-color: var(--cyan); outline: none; }
.search-box input::placeholder { color: var(--text-faint); }
.search-box svg {
  position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--text-faint);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.project-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.project-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-soft); }

.project-thumb {
  aspect-ratio: 16/10;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.project-thumb svg,
.project-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.project-status {
  position: absolute;
  top: 12px; right: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
  border: 1px solid var(--border-strong);
  background: rgba(10,13,19,0.55);
}
.project-status.status-completed { color: var(--cyan); }
.project-status.status-in-progress { color: var(--copper-bright); }
.project-status.status-prototype,
.project-status.status-concept { color: var(--text-dim); }

.project-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.project-category {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.project-title { font-size: 18.5px; font-weight: 600; }
.project-desc { font-size: 14px; color: var(--text-dim); flex: 1; }
.project-tech { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tech span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.project-actions {
  display: flex;
  gap: 8px;
  margin-top: 6px;
  flex-wrap: wrap;
}
.project-actions .btn { flex: 1; justify-content: center; padding: 9px 10px; font-size: 12.5px; }

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 70px 20px;
  color: var(--text-faint);
}
.empty-state svg { width: 46px; height: 46px; margin: 0 auto 16px; opacity: .5; }
.empty-state h3 { font-size: 17px; color: var(--text-dim); margin-bottom: 6px; }
.empty-state p { font-size: 14px; }

/* ==========================================================================
   PROJECT DETAIL OVERLAY (client-side route: #/project/:id)
   ========================================================================== */
.detail-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: var(--bg);
  overflow-y: auto;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.detail-overlay.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }

.detail-topbar {
  position: sticky; top: 0; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
}
.back-link:hover { color: var(--cyan); }
.back-link svg { width: 16px; height: 16px; }

.detail-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 50px 24px 120px;
}
.detail-hero-thumb {
  aspect-ratio: 21/9;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 34px;
}
.detail-hero-thumb svg,
.detail-hero-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.gallery-img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.detail-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.detail-title { font-size: clamp(28px, 4vw, 40px); font-weight: 700; margin-bottom: 18px; }
.detail-meta-row {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-bottom: 30px;
}
.detail-meta-row .project-status { position: static; }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 44px; }

.detail-block { margin-bottom: 38px; }
.detail-block h3 {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--copper-bright);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
  display: flex; align-items: center; gap: 10px;
}
.detail-block h3::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.detail-block p { color: var(--text-dim); font-size: 15.5px; line-height: 1.75; }
.detail-block ul { display: flex; flex-direction: column; gap: 10px; }
.detail-block ul li {
  position: relative; padding-left: 20px; color: var(--text-dim); font-size: 15px;
}
.detail-block ul li::before {
  content: "▹"; position: absolute; left: 0; color: var(--cyan);
}
.detail-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.detail-tags span {
  font-family: var(--font-mono); font-size: 12px; padding: 6px 12px;
  border-radius: 7px; background: var(--panel); border: 1px solid var(--border); color: var(--text-dim);
}
.detail-links { display: flex; gap: 12px; flex-wrap: wrap; }

.gallery-placeholder {
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 40px 20px;
  text-align: center;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.video-placeholder {
  aspect-ratio: 16/9;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  display: grid; place-items: center;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 12.5px;
  gap: 10px;
}
.video-placeholder svg { width: 34px; height: 34px; margin: 0 auto 10px; }

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 40px;
}
.contact-info-card { padding: 32px; }
.contact-info-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-icon {
  width: 38px; height: 38px; border-radius: 9px;
  background: var(--panel); border: 1px solid var(--border);
  display: grid; place-items: center; color: var(--copper-bright); flex-shrink: 0;
}
.contact-info-icon svg { width: 17px; height: 17px; }
.contact-info-label { font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-faint); }
.contact-info-value { font-size: 14.5px; font-weight: 500; margin-top: 2px; word-break: break-word; }

.contact-form-card { padding: 32px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint);
}
.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14.5px;
  resize: vertical;
  transition: border-color .2s var(--ease);
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--cyan); }
.form-status {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  display: none;
}
.form-status.is-visible { display: block; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 30px;
  background: color-mix(in srgb, var(--bg) 93%, transparent);
}
.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  padding-bottom: 36px;
}
.footer-brand .brand { margin-bottom: 12px; }
.footer-tagline { color: var(--text-dim); font-size: 14px; max-width: 320px; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-links {
  display: flex;
  gap: 60px;
  flex-wrap: wrap;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
  margin-bottom: 16px;
}
.footer-col a, .footer-col span {
  display: block;
  font-size: 14px;
  color: var(--text-dim);
  padding: 6px 0;
}
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  padding-top: 26px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}

/* ==========================================================================
   404 PAGE
   ========================================================================== */
.page-404 {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
}
.page-404 .code-404 {
  font-family: var(--font-mono);
  font-size: clamp(70px, 16vw, 140px);
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--copper-bright), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.page-404 h2 { margin-top: 8px; font-size: 22px; }
.page-404 p { margin-top: 12px; color: var(--text-dim); }
.page-404 .btn { margin-top: 28px; }

/* ==========================================================================
   SKIP LINK / A11Y
   ========================================================================== */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--copper-bright);
  color: #14100a;
  padding: 12px 18px;
  z-index: 9999;
  border-radius: 0 0 8px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; text-align: left; }
  .hero-visual { order: -1; max-width: 260px; margin: 0 0 20px; }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .section { padding: 90px 0 70px; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; gap: 6px; }
  .footer-top { flex-direction: column; }
  .bg-decor { opacity: calc(var(--decor-opacity) * 0.6); }
  .bg-decor svg { right: -30vw; width: 110vw; height: 110vw; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}