/* ============================================================
   errors.css — "NEON VOID" error page theme
   Synthwave / outrun rework. Pure CSS, zero JavaScript.
   All existing HTML class names are preserved.
   ============================================================ */

:root {
  /* deep-space palette */
  --bg-0: #050212;
  --bg-1: #0d0626;
  --bg-2: #170a34;
  --panel-a: rgba(37, 17, 71, 0.78);
  --panel-b: rgba(13, 6, 30, 0.88);
  --line: rgba(139, 92, 246, 0.32);
  --line-strong: rgba(0, 229, 255, 0.55);

  /* neon accent set */
  --neon-pink: #ff2d95;
  --neon-cyan: #00e5ff;
  --neon-violet: #a855f7;
  --neon-yellow: #f9f002;

  /* text */
  --text-main: #f4ecff;
  --text-muted: #c8b8ea;
  --text-dim: #8a79b4;

  --font-main: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  color: var(--text-main);
  font-family: var(--font-main);
  background:
    /* faint cyber grid */
    linear-gradient(rgba(168, 85, 247, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 85, 247, 0.055) 1px, transparent 1px),
    /* nebula blobs */
    radial-gradient(38rem 26rem at 12% 6%, rgba(255, 45, 149, 0.16), transparent 62%),
    radial-gradient(34rem 24rem at 88% 10%, rgba(0, 229, 255, 0.13), transparent 62%),
    /* synthwave sun glow rising from the bottom */
    radial-gradient(52rem 34rem at 50% 112%, rgba(168, 85, 247, 0.28), rgba(255, 45, 149, 0.10) 42%, transparent 68%),
    /* deep space falloff */
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 52%, var(--bg-2) 100%);
  background-size: 32px 32px, 32px 32px, auto, auto, auto, auto;
  background-attachment: fixed;
}

/* ---------- starfield (twinkling, drifting) ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 22%, rgba(255, 255, 255, 0.95), transparent 60%),
    radial-gradient(1px 1px at 27% 68%, rgba(0, 229, 255, 0.95), transparent 60%),
    radial-gradient(1.5px 1.5px at 41% 12%, rgba(255, 255, 255, 0.85), transparent 60%),
    radial-gradient(1px 1px at 58% 41%, rgba(255, 45, 149, 0.95), transparent 60%),
    radial-gradient(1.5px 1.5px at 71% 78%, rgba(255, 255, 255, 0.9), transparent 60%),
    radial-gradient(1px 1px at 84% 28%, rgba(0, 229, 255, 0.9), transparent 60%),
    radial-gradient(2px 2px at 93% 61%, rgba(255, 255, 255, 0.95), transparent 60%),
    radial-gradient(1px 1px at 8% 88%, rgba(249, 240, 2, 0.8), transparent 60%);
  background-size: 260px 260px, 340px 340px, 300px 300px, 380px 380px,
                    280px 280px, 360px 360px, 320px 320px, 400px 400px;
  background-repeat: repeat;
  opacity: 0.85;
  animation: starfield 26s linear infinite;
}

@keyframes starfield {
  0%   { background-position: 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, 0 0; opacity: 0.8; }
  50%  { opacity: 1; }
  100% { background-position: 40px -40px, -60px 30px, 80px -20px, -30px 60px,
                            50px 20px, -80px -50px, 20px 40px, -40px -30px; opacity: 0.8; }
}

/* ---------- CRT scanlines + animated scan beam + vignette ---------- */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    /* moving scan beam */
    linear-gradient(180deg, transparent 0%, transparent 48%, rgba(0, 229, 255, 0.045) 50%, transparent 52%),
    /* scanlines */
    repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.18) 0px, rgba(0, 0, 0, 0.18) 1px, transparent 1px, transparent 3px),
    /* vignette */
    radial-gradient(ellipse at center, transparent 52%, rgba(3, 0, 12, 0.6) 100%);
  background-size: 100% 140px, auto, auto;
  opacity: 0.5;
  animation: scanbeam 8s linear infinite;
}

@keyframes scanbeam {
  from { background-position: 0 -140px, 0 0, 0 0; }
  to   { background-position: 0 100vh, 0 0, 0 0; }
}

/* ---------- ambient particle orbs ---------- */
.particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--neon-cyan);
  box-shadow: 0 0 12px 3px rgba(0, 229, 255, 0.55);
  animation: drift 9s ease-in-out infinite alternate;
}

.particle:nth-child(1) { background: var(--neon-pink);  box-shadow: 0 0 12px 3px rgba(255, 45, 149, 0.55); }
.particle:nth-child(2) { background: var(--neon-violet); box-shadow: 0 0 12px 3px rgba(168, 85, 247, 0.55); animation-delay: -3s; }
.particle:nth-child(3) { background: var(--neon-yellow); box-shadow: 0 0 12px 3px rgba(249, 240, 2, 0.5);   animation-delay: -5s; }
.particle:nth-child(4) { background: var(--neon-cyan);   box-shadow: 0 0 12px 3px rgba(0, 229, 255, 0.55);   animation-delay: -1.5s; }
.particle:nth-child(5) { background: var(--neon-pink);   box-shadow: 0 0 12px 3px rgba(255, 45, 149, 0.5);   animation-delay: -7s; }

@keyframes drift {
  0%   { transform: translate3d(0, 0, 0) scale(0.8);  opacity: 0.45; }
  100% { transform: translate3d(14px, -34px, 0) scale(1.25); opacity: 1; }
}

/* ============================================================
   THE CARD
   ============================================================ */

.error-shell {
  position: relative;
  z-index: 1;
  width: min(92vw, 780px);
  padding: 34px 36px 30px;
  border-radius: 22px;
  background:
    linear-gradient(165deg, rgba(255, 255, 255, 0.05), transparent 38%),
    linear-gradient(160deg, var(--panel-a), var(--panel-b));
  -webkit-backdrop-filter: blur(16px) saturate(1.35);
  backdrop-filter: blur(16px) saturate(1.35);
  box-shadow:
    0 0 0 1px rgba(168, 85, 247, 0.22),
    0 34px 90px rgba(0, 0, 0, 0.65),
    0 0 70px rgba(255, 45, 149, 0.14),
    0 0 130px rgba(0, 229, 255, 0.10);
  animation: float 7s ease-in-out infinite;
}

/* gradient neon border */
.error-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  pointer-events: none;
  background: linear-gradient(135deg,
    rgba(255, 45, 149, 0.85),
    rgba(168, 85, 247, 0.35) 32%,
    rgba(0, 229, 255, 0.35) 68%,
    rgba(249, 240, 2, 0.75));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask-composite: exclude;
}

/* glowing top accent strip */
.error-shell::after {
  content: "";
  position: absolute;
  top: 0;
  left: 16%;
  right: 16%;
  height: 2px;
  border-radius: 0 0 2px 2px;
  pointer-events: none;
  background: linear-gradient(90deg,
    transparent,
    var(--neon-pink) 28%,
    var(--neon-violet) 50%,
    var(--neon-cyan) 72%,
    transparent);
  box-shadow:
    0 0 16px rgba(255, 45, 149, 0.85),
    0 0 34px rgba(0, 229, 255, 0.5);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-7px); }
}

/* ============================================================
   HEADER / ERROR CODE
   ============================================================ */

.error-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 20px;
  margin-bottom: 26px;
  border-bottom: 1px solid rgba(139, 92, 246, 0.25);
}

.error-code {
  position: relative;
  display: inline-block;
  margin-bottom: 8px;
  color: transparent;
  font-family: var(--font-mono);
  font-size: clamp(4.2rem, 11vw, 7.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: 0.02em;
  background: linear-gradient(115deg, var(--neon-pink) 8%, var(--neon-violet) 46%, var(--neon-cyan) 92%);
  -webkit-background-clip: text;
          background-clip: text;
  filter: drop-shadow(0 0 14px rgba(255, 45, 149, 0.35))
          drop-shadow(0 0 44px rgba(0, 229, 255, 0.28));
  animation: neon-flicker 6s infinite;
}

/* chromatic glitch slices (copies of the code via data-text) */
.error-code::before,
.error-code::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: screen;
  animation-timing-function: steps(1, end);
}

.error-code::before {
  color: var(--neon-cyan);
  opacity: 0.8;
  clip-path: inset(0 0 58% 0);
  animation-name: glitch-slice-a;
  animation-duration: 3.4s;
  animation-iteration-count: infinite;
}

.error-code::after {
  color: var(--neon-pink);
  opacity: 0.85;
  clip-path: inset(60% 0 0 0);
  animation-name: glitch-slice-b;
  animation-duration: 2.6s;
  animation-iteration-count: infinite;
}

@keyframes neon-flicker {
  0%, 89%, 93%, 100% { opacity: 1; }
  90% { opacity: 0.82; }
  91% { opacity: 0.96; }
  92% { opacity: 0.78; }
}

@keyframes glitch-slice-a {
  0%   { clip-path: inset(0 0 58% 0); transform: translate(-3px, -1px); }
  12%  { clip-path: inset(12% 0 62% 0); transform: translate(3px, 1px); }
  24%  { clip-path: inset(42% 0 22% 0); transform: translate(-2px, 0); }
  36%  { clip-path: inset(0 0 78% 0); transform: translate(2px, -2px); }
  48%  { clip-path: inset(24% 0 44% 0); transform: translate(-4px, 1px); }
  60%  { clip-path: inset(4% 0 70% 0); transform: translate(3px, 2px); }
  72%  { clip-path: inset(50% 0 20% 0); transform: translate(-2px, -1px); }
  84%  { clip-path: inset(18% 0 56% 0); transform: translate(2px, 0); }
  100% { clip-path: inset(0 0 58% 0); transform: translate(-3px, -1px); }
}

@keyframes glitch-slice-b {
  0%   { clip-path: inset(60% 0 0 0); transform: translate(3px, 1px); }
  15%  { clip-path: inset(70% 0 0 0); transform: translate(-3px, -1px); }
  30%  { clip-path: inset(45% 0 0 0); transform: translate(4px, 2px); }
  45%  { clip-path: inset(80% 0 0 0); transform: translate(-2px, 1px); }
  60%  { clip-path: inset(55% 0 0 0); transform: translate(3px, -1px); }
  75%  { clip-path: inset(66% 0 0 0); transform: translate(-4px, 2px); }
  90%  { clip-path: inset(48% 0 0 0); transform: translate(2px, 1px); }
  100% { clip-path: inset(60% 0 0 0); transform: translate(3px, 1px); }
}

.error-label {
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.55);
}

.error-label::before {
  content: "// ";
  color: var(--neon-pink);
  text-shadow: 0 0 10px rgba(255, 45, 149, 0.6);
}

/* ---------- status chip ---------- */
.status-chip {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 9px;
  max-width: 100%;
  padding: 8px 13px;
  border: 1px solid rgba(255, 45, 149, 0.45);
  border-radius: 999px;
  background: rgba(255, 45, 149, 0.09);
  color: #ffd3e8;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.35;
  box-shadow: 0 0 18px rgba(255, 45, 149, 0.18), inset 0 0 10px rgba(255, 45, 149, 0.08);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
}

.status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-pink);
  animation: status-pulse 1.6s ease-out infinite;
}

@keyframes status-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(255, 45, 149, 0.55), 0 0 10px var(--neon-pink); }
  70%  { box-shadow: 0 0 0 8px rgba(255, 45, 149, 0), 0 0 16px var(--neon-pink); }
  100% { box-shadow: 0 0 0 0 rgba(255, 45, 149, 0), 0 0 10px var(--neon-pink); }
}

/* ============================================================
   TITLE / BODY COPY
   ============================================================ */

.error-title {
  margin: 0 0 14px;
  max-width: 46rem;
  color: var(--text-main);
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  font-weight: 750;
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-shadow: 0 0 34px rgba(168, 85, 247, 0.35);
}

/* gradient underline accent */
.error-title::after {
  content: "";
  display: block;
  width: 74px;
  height: 3px;
  margin-top: 12px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--neon-pink), var(--neon-violet), var(--neon-cyan));
  box-shadow: 0 0 14px rgba(255, 45, 149, 0.65), 0 0 24px rgba(0, 229, 255, 0.4);
}

.error-message {
  max-width: 62ch;
  margin: 0 0 22px;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
}

/* ---------- terminal-style hint box ---------- */
.error-meta {
  position: relative;
  margin: 0 0 26px;
  padding: 13px 16px 13px 40px;
  border: 1px solid rgba(0, 229, 255, 0.28);
  border-radius: 10px;
  background:
    linear-gradient(90deg, rgba(0, 229, 255, 0.07), transparent 46%),
    rgba(4, 2, 16, 0.6);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.55;
  box-shadow: inset 0 0 22px rgba(0, 229, 255, 0.05);
}

.error-meta::before {
  content: ">";
  position: absolute;
  left: 17px;
  top: 13px;
  color: var(--neon-pink);
  font-weight: 700;
  text-shadow: 0 0 9px rgba(255, 45, 149, 0.8);
}

/* blinking cursor block at the end of the "terminal" */
.error-meta::after {
  content: "";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 15px;
  background: var(--neon-cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.9);
  opacity: 0.8;
  animation: cursor-blink 1.1s steps(2, start) infinite;
}

@keyframes cursor-blink {
  0% { opacity: 0.85; }
  50% { opacity: 0; }
  100% { opacity: 0.85; }
}

/* ============================================================
   ACTIONS / BUTTONS
   ============================================================ */

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  gap: 9px;
  padding: 0 20px;
  appearance: none;
  border: 1px solid rgba(0, 229, 255, 0.55);
  border-radius: 0;
  background: linear-gradient(135deg, rgba(255, 45, 149, 0.18), rgba(0, 229, 255, 0.12));
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  /* cyberpunk notched corner */
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  box-shadow:
    0 0 16px rgba(0, 229, 255, 0.22),
    inset 0 0 14px rgba(255, 45, 149, 0.12);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
              background 0.18s ease, color 0.18s ease;
}

.error-btn span {
  color: var(--neon-cyan);
  font-size: 1.05rem;
  line-height: 1;
  text-shadow: 0 0 10px rgba(0, 229, 255, 0.8);
  transition: color 0.18s ease, transform 0.18s ease;
}

.error-btn:hover,
.error-btn:focus-visible {
  transform: translateY(-3px);
  background: linear-gradient(135deg, rgba(255, 45, 149, 0.32), rgba(0, 229, 255, 0.24));
  box-shadow:
    0 8px 26px rgba(0, 0, 0, 0.45),
    0 0 26px rgba(255, 45, 149, 0.5),
    0 0 40px rgba(0, 229, 255, 0.35),
    inset 0 0 18px rgba(255, 45, 149, 0.2);
  outline: none;
}

.error-btn:hover span,
.error-btn:focus-visible span {
  color: var(--neon-pink);
  text-shadow: 0 0 10px rgba(255, 45, 149, 0.9);
  transform: translateX(1px);
}

.error-btn.secondary {
  background: transparent;
  border-color: rgba(168, 85, 247, 0.55);
  color: var(--text-muted);
  box-shadow: inset 0 0 12px rgba(168, 85, 247, 0.1);
}

.error-btn.secondary span {
  color: var(--neon-violet);
  text-shadow: 0 0 10px rgba(168, 85, 247, 0.8);
}

.error-btn.secondary:hover,
.error-btn.secondary:focus-visible {
  background: rgba(168, 85, 247, 0.16);
  border-color: var(--neon-pink);
  color: #ffffff;
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.4),
    0 0 26px rgba(168, 85, 247, 0.45);
}

/* ============================================================
   FOOTER
   ============================================================ */

.error-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(139, 92, 246, 0.22);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.76rem;
}

.badge-pill {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid rgba(249, 240, 2, 0.42);
  border-radius: 6px;
  background: rgba(249, 240, 2, 0.08);
  color: #ffe86a;
  text-shadow: 0 0 10px rgba(249, 240, 2, 0.45);
  box-shadow: 0 0 14px rgba(249, 240, 2, 0.12);
}

code {
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  text-shadow: 0 0 10px rgba(0, 229, 255, 0.45);
}

/* ---------- extras ---------- */
::selection {
  background: rgba(255, 45, 149, 0.55);
  color: #ffffff;
}

::-webkit-scrollbar {
  width: 12px;
}
::-webkit-scrollbar-track {
  background: var(--bg-0);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--neon-pink), var(--neon-violet), var(--neon-cyan));
  border-radius: 8px;
  border: 3px solid var(--bg-0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 600px) {
  body {
    padding: 18px;
    align-items: flex-start;
  }

  .error-shell {
    width: 100%;
    padding: 26px 20px 24px;
    border-radius: 16px;
  }

  .error-header {
    flex-direction: column;
    gap: 14px;
  }

  .error-actions {
    flex-direction: column;
  }

  .error-btn {
    width: 100%;
  }

  .error-code {
    font-size: clamp(3.4rem, 16vw, 5rem);
  }
}

/* ---------- reduced motion: keep it calm ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
  }

  .error-shell {
    animation: none;
  }
}