/* ==========================================================================
   HPURINI // PERSONAL LAB — temporary landing page
   ========================================================================== */

:root {
  --bg: #060b14;
  --bg-deep: #03060c;
  --surface: #0c1422;
  --text: #e6eef7;
  --muted: #8da3b8;
  --energy: #3de0ff;
  --energy-bright: #7ef9ff;
  --energy-dim: rgba(61, 224, 255, 0.18);
  --gold: #d4b36a;
  --crimson: #c44545;
  --border: rgba(141, 163, 184, 0.22);
  --glow: 0 0 28px rgba(61, 224, 255, 0.35);
  --font: "Segoe UI", "Helvetica Neue", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "Cascadia Code", "Segoe UI Mono", "SF Mono", Consolas, monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --max: 72rem;
  --core-size: min(42vw, 28rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* --------------------------------------------------------------------------
   Atmosphere
   -------------------------------------------------------------------------- */

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  mix-blend-mode: overlay;
}

.grid-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(61, 224, 255, 0.06), transparent 62%),
    radial-gradient(circle at 50% 45%, transparent 18%, rgba(3, 6, 12, 0.55) 72%),
    linear-gradient(rgba(141, 163, 184, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 163, 184, 0.035) 1px, transparent 1px);
  background-size:
    100% 100%,
    100% 100%,
    48px 48px,
    48px 48px;
  background-position: center;
}

.scanline {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 40;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(61, 224, 255, 0.03) 50%,
    transparent 100%
  );
  background-size: 100% 220%;
  animation: scan-drift 14s linear infinite;
  opacity: 0.55;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  transition: transform 0.6s var(--ease);
  will-change: transform;
}

.ambient__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
}

.ambient__orb--a {
  width: 28rem;
  height: 28rem;
  top: 8%;
  left: 12%;
  background: radial-gradient(circle, rgba(61, 224, 255, 0.22), transparent 70%);
}

.ambient__orb--b {
  width: 22rem;
  height: 22rem;
  bottom: 10%;
  right: 8%;
  background: radial-gradient(circle, rgba(196, 69, 69, 0.12), transparent 70%);
}

/* --------------------------------------------------------------------------
   Layout shell
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.55rem 0.9rem;
  background: var(--surface);
  color: var(--energy-bright);
  border: 1px solid var(--border);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--energy);
  outline-offset: 2px;
}

.shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem clamp(1rem, 3vw, 2rem) 1.5rem;
}

/* --------------------------------------------------------------------------
   Top bar
   -------------------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.mark {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 1.5vw, 0.8rem);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.mark__brand {
  color: var(--text);
  font-weight: 600;
}

.mark__sep {
  color: var(--energy);
  opacity: 0.7;
}

.mark__lab {
  color: var(--muted);
  font-weight: 400;
}

.status-pill {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.status-pill__dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--energy);
  box-shadow: var(--glow);
  animation: status-blink 2.8s ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   Stage / hero
   -------------------------------------------------------------------------- */

.stage {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  padding: clamp(1rem, 3vh, 2.5rem) 0;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: clamp(1.25rem, 3vh, 2rem);
}

.core-wrap {
  width: var(--core-size);
  aspect-ratio: 1;
  position: relative;
  transition: transform 0.45s var(--ease);
  will-change: transform;
  filter: drop-shadow(0 0 32px rgba(61, 224, 255, 0.18));
}

.core {
  width: 100%;
  height: 100%;
  color: var(--muted);
  overflow: visible;
}

.core__ring--outer,
.core__ring--mid,
.core__ring--inner,
.core__scanner,
.core__glow,
.core__breath,
.core__pulse-dot,
.core__circuit {
  transform-box: view-box;
  transform-origin: center;
}

.core__ring--outer {
  animation: spin-cw 48s linear infinite;
}

.core__ring--mid {
  animation: spin-ccw 32s linear infinite;
}

.core__ring--inner {
  animation: spin-cw 22s linear infinite;
}

.core__scanner {
  animation: spin-cw 9s linear infinite;
  opacity: 0.85;
}

.core__glow {
  animation: glow-breathe 4.5s ease-in-out infinite;
}

.core__breath {
  animation: ring-breathe 3.6s ease-in-out infinite;
}

.core__pulse-dot {
  animation: nucleus-pulse 2.4s ease-in-out infinite;
}

.core__circuit {
  animation: spin-ccw 60s linear infinite;
}

.ind--a { animation: ind-pulse 2.2s ease-in-out infinite; }
.ind--b { animation: ind-pulse 2.8s ease-in-out 0.4s infinite; }
.ind--c { animation: ind-pulse 3.1s ease-in-out 0.9s infinite; }

.copy {
  max-width: 34rem;
}

.headline {
  margin: 0 0 1rem;
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  font-weight: 650;
  letter-spacing: 0.08em;
  line-height: 1.15;
  color: var(--text);
  text-wrap: balance;
}

.manifesto {
  margin: 0 0 1.15rem;
  font-size: clamp(0.95rem, 1.7vw, 1.08rem);
  color: var(--muted);
  letter-spacing: 0.02em;
  line-height: 1.7;
}

.systems {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.72rem, 1.3vw, 0.8rem);
  letter-spacing: 0.08em;
  color: rgba(141, 163, 184, 0.78);
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   HUD instrumentation
   -------------------------------------------------------------------------- */

.hud {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  align-self: center;
}

.hud--left {
  align-items: flex-start;
}

.hud--right {
  align-items: flex-end;
}

.hud__block {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  padding: 0.35rem 0;
  border-left: 1px solid var(--border);
  padding-left: 0.85rem;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.hud__block--right {
  border-left: none;
  border-right: 1px solid var(--border);
  padding-left: 0;
  padding-right: 0.85rem;
  text-align: right;
}

.hud__block:hover {
  border-color: rgba(61, 224, 255, 0.55);
}

.hud__block:hover .hud__label {
  color: var(--energy);
}

.hud__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: rgba(141, 163, 184, 0.65);
  text-transform: uppercase;
  transition: color 0.25s var(--ease);
}

.hud__value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--text);
  text-transform: uppercase;
}

.hud__value--energy {
  color: var(--energy);
  text-shadow: 0 0 12px rgba(61, 224, 255, 0.35);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.themes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.themes__item {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: rgba(141, 163, 184, 0.55);
  text-transform: uppercase;
  transition: color 0.25s var(--ease);
}

.themes__item:hover {
  color: var(--energy);
}

.themes__item span {
  color: rgba(61, 224, 255, 0.45);
}

.domain {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  color: rgba(141, 163, 184, 0.5);
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */

@keyframes spin-cw {
  to { transform: rotate(360deg); }
}

@keyframes spin-ccw {
  to { transform: rotate(-360deg); }
}

@keyframes glow-breathe {
  0%, 100% { opacity: 0.75; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}

@keyframes ring-breathe {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.75; transform: scale(1.08); }
}

@keyframes nucleus-pulse {
  0%, 100% { opacity: 0.85; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.18); }
}

@keyframes ind-pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

@keyframes status-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

@keyframes scan-drift {
  0% { background-position: 0% 0%; }
  100% { background-position: 0% 100%; }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .scanline,
  .core__ring--outer,
  .core__ring--mid,
  .core__ring--inner,
  .core__scanner,
  .core__glow,
  .core__breath,
  .core__pulse-dot,
  .core__circuit,
  .ind--a,
  .ind--b,
  .ind--c,
  .status-pill__dot {
    animation: none !important;
  }

  .core__glow {
    opacity: 0.9;
  }

  .core__pulse-dot {
    opacity: 1;
  }

  .ambient,
  .core-wrap {
    transition: none !important;
    transform: none !important;
  }

  .scanline {
    opacity: 0.2;
    background-position: 0 40%;
  }
}

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

@media (max-width: 960px) {
  :root {
    --core-size: min(58vw, 22rem);
  }

  .stage {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    justify-items: center;
    gap: 1.5rem;
  }

  .hud {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1.25rem;
    width: 100%;
  }

  .hud--left,
  .hud--right {
    align-items: stretch;
  }

  .hud--left {
    order: 2;
  }

  .hero {
    order: 1;
  }

  .hud--right {
    order: 3;
  }

  .hud__block,
  .hud__block--right {
    border: 1px solid var(--border);
    padding: 0.55rem 0.75rem;
    text-align: left;
    min-width: 8.5rem;
  }

  .hud__block--right {
    text-align: left;
  }
}

@media (max-width: 640px) {
  :root {
    --core-size: min(78vw, 18rem);
  }

  .shell {
    padding: 1rem 1rem 1.25rem;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.65rem;
  }

  .mark {
    letter-spacing: 0.12em;
  }

  .headline {
    letter-spacing: 0.05em;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .themes__item {
    letter-spacing: 0.12em;
  }

  .ambient__orb--a,
  .ambient__orb--b {
    width: 16rem;
    height: 16rem;
    opacity: 0.25;
  }
}

@media (min-width: 1600px) {
  :root {
    --max: 80rem;
    --core-size: min(36vw, 30rem);
  }
}

@media (min-height: 900px) and (min-width: 1100px) {
  .stage {
    padding: 2.5rem 0;
  }
}