/* ============================================================
   Bob Labs — landing page
   Dark, elegant, with a 3D perspective grid that tilts on scroll.
   ============================================================ */

:root {
  --bg: #07090d;
  --bg-2: #0b0f16;
  --ink: #e7ecf3;
  --ink-dim: #93a0b3;
  --ink-mute: #5b6678;
  --line: rgba(255,255,255,0.08);
  --line-strong: rgba(255,255,255,0.14);
  --max: 1200px;
  --radius: 14px;
  --t: cubic-bezier(.22,.61,.36,1);

  /* Theme tokens — overridden per [data-theme] below */
  --accent:    #5eead4;
  --accent-2:  #60a5fa;
  --accent-3:  #a78bfa;
  --grid:        rgba(120, 200, 255, 0.18);
  --grid-strong: rgba(120, 200, 255, 0.32);
  --bg-tint-a: rgba(96,165,250,0.12);
  --bg-tint-b: rgba(167,139,250,0.08);

  /* Static palette tokens (used by per-card accents) */
  --cyan: #5eead4;
  --blue: #60a5fa;
  --violet: #a78bfa;
  --emerald: #34d399;
  --amber: #fbbf24;
}

/* === THEMES ============================================== */
html[data-theme="tech"] {
  --accent:    #5eead4;
  --accent-2:  #60a5fa;
  --accent-3:  #a78bfa;
  --grid:        rgba(120, 200, 255, 0.18);
  --grid-strong: rgba(120, 200, 255, 0.32);
  --bg-tint-a: rgba(96,165,250,0.12);
  --bg-tint-b: rgba(167,139,250,0.08);
}
html[data-theme="finance"] {
  --accent:    #fbbf24;     /* amber */
  --accent-2:  #f97316;     /* orange */
  --accent-3:  #f472b6;
  --grid:        rgba(251, 191, 36, 0.16);
  --grid-strong: rgba(249, 115, 22, 0.28);
  --bg-tint-a: rgba(251,191,36,0.10);
  --bg-tint-b: rgba(249,115,22,0.08);
}
html[data-theme="agri"] {
  --accent:    #34d399;     /* emerald */
  --accent-2:  #84cc16;     /* lime */
  --accent-3:  #fbbf24;
  --grid:        rgba(52, 211, 153, 0.18);
  --grid-strong: rgba(132, 204, 22, 0.30);
  --bg-tint-a: rgba(52,211,153,0.12);
  --bg-tint-b: rgba(132,204,22,0.08);
}
html { transition: background 600ms var(--t); }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  line-height: 1.5;
  min-height: 100vh;
  background:
    radial-gradient(1200px 700px at 80% -10%, var(--bg-tint-a), transparent 60%),
    radial-gradient(900px 600px at 10% 30%, var(--bg-tint-b), transparent 60%),
    linear-gradient(180deg, #06080c 0%, #07090d 100%);
  transition: background 600ms var(--t);
}

a { color: inherit; text-decoration: none; }

/* ----------------------------------------------------------------
   3D GRID BACKGROUND
   ---------------------------------------------------------------- */
.grid-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  perspective: 900px;
  perspective-origin: 50% 50%;
  overflow: hidden;
}

.grid-scene {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  /* Driven by JS through CSS variables */
  --tilt: 0deg;     /* 0deg = flat front, ~65deg = strong perspective */
  --shift: 0px;     /* vertical translation */
  transform: translateY(var(--shift)) rotateX(var(--tilt));
  transition: transform 60ms linear;
  will-change: transform;
}

.flock {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: .9;
}

.grid-plane {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 320vmax;
  height: 320vmax;
  margin-left: -160vmax;
  margin-top: -160vmax;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(var(--grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-strong) 1px, transparent 1px);
  background-size:
    40px 40px,
    40px 40px,
    200px 200px,
    200px 200px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
  /* Soft fade towards the horizon */
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, #000 0%, #000 35%, transparent 75%);
          mask-image: radial-gradient(ellipse at 50% 50%, #000 0%, #000 35%, transparent 75%);
  opacity: 0.9;
}

.grid-floor {
  transform: translateZ(0) translateY(8vh);
}

.grid-ceiling {
  transform: translateZ(0) translateY(-8vh);
  opacity: 0.55;
}

.vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 60%, transparent 0%, transparent 35%, rgba(6,8,12,0.7) 80%, #06080c 100%),
    linear-gradient(180deg, rgba(6,8,12,0.4) 0%, transparent 25%, transparent 75%, rgba(6,8,12,0.85) 100%);
}

.noise {
  position: absolute; inset: 0;
  opacity: .035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ----------------------------------------------------------------
   LAYOUT WRAPPERS
   ---------------------------------------------------------------- */
.nav, .hero, .projects, .manifesto, .contact, .foot {
  position: relative;
  z-index: 2;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

/* ----------------------------------------------------------------
   NAV
   ---------------------------------------------------------------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 18px;
  padding-bottom: 18px;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: .2px;
}
.diamond {
  color: var(--accent);
  text-shadow: 0 0 14px color-mix(in srgb, var(--accent) 55%, transparent);
  font-size: 18px;
  transition: color 400ms var(--t), text-shadow 400ms var(--t);
}

.nav-tools {
  display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap;
}

/* Segmented control (theme + lang switchers) */
.seg {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 3px;
  background: rgba(255,255,255,0.025);
  backdrop-filter: blur(8px);
}
.seg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-dim);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 11px;
  min-width: 34px;
  border-radius: 999px;
  cursor: pointer;
  line-height: 1;
  transition: color 200ms var(--t), background 200ms var(--t), box-shadow 200ms var(--t);
}
.seg-btn:hover { color: var(--ink); }
.seg-btn[aria-pressed="true"] {
  color: #06121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 16px -8px color-mix(in srgb, var(--accent-2) 70%, transparent);
}
.seg-btn[data-theme-btn] { font-size: 15px; }
.brand-name { font-size: 16px; }

.nav-links {
  display: flex; gap: 28px;
  font-size: 14px; color: var(--ink-dim);
}
.nav-links a:hover { color: var(--ink); }

.btn-ghost, .btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 500;
  padding: 10px 16px;
  border-radius: 999px;
  transition: all .25s var(--t);
  white-space: nowrap;
}
.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06121a;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,.15);
  box-shadow: 0 10px 30px -10px color-mix(in srgb, var(--accent-2) 60%, transparent);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px -12px color-mix(in srgb, var(--accent-2) 75%, transparent);
}

/* ----------------------------------------------------------------
   HERO
   ---------------------------------------------------------------- */
.hero {
  padding-top: 90px;
  padding-bottom: 140px;
  text-align: center;
}
.badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.02);
  border-radius: 999px;
  font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-dim);
  backdrop-filter: blur(8px);
}
.badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--emerald);
  box-shadow: 0 0 10px var(--emerald);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }

.hero h1 {
  font-size: clamp(40px, 6vw, 78px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 28px auto 22px;
  font-weight: 600;
  max-width: 16ch;
}
.grad   { background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-2 { background: linear-gradient(120deg, var(--accent-2), var(--accent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-3 { background: linear-gradient(120deg, var(--accent-3), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }

.lede {
  max-width: 640px; margin: 0 auto 38px;
  color: var(--ink-dim);
  font-size: 17px;
}

.cta-row {
  display: flex; gap: 12px; flex-wrap: wrap; justify-content: center;
}

.scroll-hint {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  margin: 90px auto 0;
  width: max-content;
  font-size: 11px; letter-spacing: .3em; text-transform: uppercase; color: var(--ink-mute);
}
.scroll-line {
  width: 1px; height: 60px;
  background: linear-gradient(180deg, var(--ink-mute), transparent);
  position: relative; overflow: hidden;
}
.scroll-line::after {
  content: ''; position: absolute; top: -20px; left: 0; width: 100%; height: 20px;
  background: linear-gradient(180deg, transparent, var(--accent));
  animation: scrollDot 2.2s ease-in-out infinite;
}
@keyframes scrollDot {
  0% { top: -20px; opacity: 0; }
  20% { opacity: 1; }
  100% { top: 60px; opacity: 0; }
}

/* ----------------------------------------------------------------
   SECTION HEAD
   ---------------------------------------------------------------- */
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.kicker {
  display: inline-block;
  font-size: 11px; letter-spacing: .35em; text-transform: uppercase;
  color: var(--accent);
  padding: 4px 0;
  margin-bottom: 14px;
  position: relative;
}
.kicker::before, .kicker::after {
  content: ''; display: inline-block; width: 24px; height: 1px;
  background: var(--accent); opacity: .5;
  vertical-align: middle; margin: 0 12px;
}
.section-head h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 14px;
}
.section-head p { color: var(--ink-dim); margin: 0; font-size: 16px; }

/* ----------------------------------------------------------------
   PROJECT CARDS
   ---------------------------------------------------------------- */
.projects { padding-top: 80px; padding-bottom: 80px; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  position: relative;
  display: flex; flex-direction: column;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.025), rgba(255,255,255,0.01)),
    rgba(11, 15, 22, 0.55);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  transition: transform .35s var(--t), border-color .35s var(--t), box-shadow .35s var(--t);
  overflow: hidden;
  min-height: 380px;
}

.card[data-accent="cyan"]    { --acc: #5eead4; --acc2: #60a5fa; }
.card[data-accent="violet"]  { --acc: #a78bfa; --acc2: #f472b6; }
.card[data-accent="emerald"] { --acc: #34d399; --acc2: #fbbf24; }

.card-glow {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity .4s var(--t);
  background: radial-gradient(380px 220px at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--acc) 22%, transparent), transparent 70%);
}
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--acc) 50%, var(--line-strong));
  box-shadow:
    0 24px 60px -20px rgba(0,0,0,.6),
    0 0 0 1px color-mix(in srgb, var(--acc) 25%, transparent);
}
.card:hover .card-glow { opacity: 1; }

.card-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 18px;
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-mute);
}
.card-tag {
  color: var(--acc);
  border: 1px solid color-mix(in srgb, var(--acc) 35%, transparent);
  padding: 4px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--acc) 8%, transparent);
}
.card-status { display: inline-flex; align-items: center; gap: 8px; }
.pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--acc);
  box-shadow: 0 0 8px var(--acc);
  animation: pulse 1.6s ease-in-out infinite;
}

.card-logo {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 36px;
  color: var(--acc);
  margin: 6px 0 18px;
  text-shadow: 0 0 18px color-mix(in srgb, var(--acc) 40%, transparent);
  line-height: 1;
}

.card h3 {
  font-size: 24px;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.card-desc {
  color: var(--ink-dim);
  font-size: 14.5px;
  margin: 0 0 18px;
  line-height: 1.55;
}

.card-feats {
  list-style: none;
  padding: 0; margin: 0 0 22px;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--ink-dim);
  display: flex; flex-direction: column; gap: 6px;
}
.card-feats li {
  position: relative;
  padding-left: 18px;
}
.card-feats li::before {
  content: '›';
  position: absolute; left: 0;
  color: var(--acc);
}

.card-foot {
  margin-top: auto;
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--ink-mute);
}
.card-domain { color: var(--ink-dim); }
.card-arrow {
  font-size: 18px;
  transition: transform .3s var(--t);
  color: var(--acc);
}
.card:hover .card-arrow { transform: translateX(4px); }

/* ----------------------------------------------------------------
   MANIFESTO
   ---------------------------------------------------------------- */
.manifesto {
  padding-top: 80px; padding-bottom: 80px;
}
.m-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(8px);
}
.m-item {
  background: rgba(11, 15, 22, 0.55);
  padding: 28px 24px;
  transition: background .3s var(--t);
}
.m-item:hover { background: rgba(20, 28, 40, 0.6); }
.m-num {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  font-size: 13px;
  margin-bottom: 14px;
  letter-spacing: .15em;
}
.m-item h4 { margin: 0 0 8px; font-size: 16px; font-weight: 600; }
.m-item p { color: var(--ink-dim); font-size: 14px; margin: 0; }

/* ----------------------------------------------------------------
   CONTACT
   ---------------------------------------------------------------- */
.contact { padding: 100px 32px; }
.contact-card {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 40px;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(94,234,212,0.04), rgba(96,165,250,0.02)),
    rgba(11, 15, 22, 0.65);
  backdrop-filter: blur(16px);
  position: relative; overflow: hidden;
}
.contact-card::before {
  content: ''; position: absolute; inset: -1px;
  border-radius: inherit;
  background: radial-gradient(600px 200px at 50% -20%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%);
  pointer-events: none;
}
.contact-card h2 {
  font-size: clamp(28px, 4vw, 44px);
  margin: 14px 0 14px;
  letter-spacing: -0.02em;
  font-weight: 600;
}
.contact-card p {
  color: var(--ink-dim);
  margin: 0 auto 28px;
  max-width: 520px;
  font-size: 16px;
}

/* ----------------------------------------------------------------
   FOOTER
   ---------------------------------------------------------------- */
.foot {
  padding-top: 50px; padding-bottom: 40px;
  border-top: 1px solid var(--line);
  margin-top: 40px;
}
.foot-row {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 20px;
  padding-bottom: 24px;
}
.foot-brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600;
}
.foot-sub {
  margin-left: 14px;
  color: var(--ink-mute);
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
}
.foot-links { display: flex; gap: 24px; font-size: 14px; color: var(--ink-dim); }
.foot-links a:hover { color: var(--accent); }
.foot-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 12px; color: var(--ink-mute);
  padding-top: 18px; border-top: 1px dashed var(--line);
}

/* ----------------------------------------------------------------
   RESPONSIVE
   ---------------------------------------------------------------- */
@media (max-width: 920px) {
  .cards { grid-template-columns: 1fr; }
  .m-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .hero { padding-top: 60px; padding-bottom: 80px; }
  .cta-mail { display: none; }
}
@media (max-width: 540px) {
  .m-grid { grid-template-columns: 1fr; }
  .nav, .hero, .projects, .manifesto, .contact, .foot {
    padding-left: 18px; padding-right: 18px;
  }
  .contact-card { padding: 36px 22px; }
  .nav-tools .seg-btn { padding: 6px 9px; min-width: 30px; font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .grid-scene { transition: none; }
  .pulse, .badge .dot, .scroll-line::after { animation: none; }
}