/* ===============================
   RESET
================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  background: #000;
  color: #fff;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ===============================
   BACKGROUND GRID
================================ */
.grid {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ===============================
   BULBS
================================ */
.bulbs {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-evenly;
  z-index: 1;
}

.bulb {
  position: relative;
  width: 30px;
}

/* ===============================
   WIRE
================================ */
.bulb::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  background: rgba(255,255,255,0.7);
  transform: translateX(-50%);
}

.bulb:nth-child(1)::before { height: 90px; }
.bulb:nth-child(2)::before { height: 150px; }
.bulb:nth-child(3)::before { height: 110px; }
.bulb:nth-child(4)::before { height: 170px; }
.bulb:nth-child(5)::before { height: 130px; }


/* ===============================
   BULB (OFF STATE)
================================ */
.bulb::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  border-bottom: 22px solid #fff;
  opacity: 0.85;
  z-index: 3;
}

/* Attach bulb */
.bulb:nth-child(1)::after { top: 80px; }
.bulb:nth-child(2)::after { top: 150px; }
.bulb:nth-child(3)::after { top: 100px; }
.bulb:nth-child(4)::after { top: 170px; }
.bulb:nth-child(5)::after { top: 120px; }

/* ===============================
   LIGHT BEAM (OFF)
================================ */
.bulb::before {
  pointer-events: none;
}

.bulb::after {
  pointer-events: none;
}

/* Beam */
.bulb::selection,
.bulb::marker {
  display: none;
}

.bulb::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 320px;
  background: radial-gradient(
    ellipse at top,
    rgba(255, 210, 80, 0.55) 0%,
    rgba(255, 200, 60, 0.35) 35%,
    rgba(255, 180, 40, 0.15) 60%,
    rgba(255, 180, 40, 0) 100%
  );
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  filter: blur(1.5px);
  opacity: 0;
  z-index: 1;
}

/* Attach beam */
.bulb:nth-child(1)::before { top: 102px; }
.bulb:nth-child(2)::before { top: 172px; }
.bulb:nth-child(3)::before { top: 122px; }
.bulb:nth-child(4)::before { top: 192px; }
.bulb:nth-child(5)::before { top: 142px; }

/* ===============================
   FLICKER ANIMATIONS
================================ */
@keyframes bulbFlicker {
  0%, 82%, 100% {
    border-bottom-color: #fff;
    filter: none;
    opacity: 0.85;
  }
  86%, 90% {
    border-bottom-color: #ffd65a;
    filter: drop-shadow(0 0 12px rgba(255,214,90,0.9))
            drop-shadow(0 0 22px rgba(255,214,90,0.6));
    opacity: 1;
  }
}

@keyframes beamFlicker {
  0%, 82%, 100% {
    opacity: 0;
  }
  86%, 90% {
    opacity: 1;
  }
}

/* ===============================
   APPLY RANDOM FLICKER
================================ */
.bulb:nth-child(1)::after,
.bulb:nth-child(1)::before {
  animation: bulbFlicker 3.6s infinite;
}

.bulb:nth-child(1)::before {
  animation-name: beamFlicker;
}

.bulb:nth-child(2)::after,
.bulb:nth-child(2)::before {
  animation: bulbFlicker 2.4s infinite;
}

.bulb:nth-child(2)::before {
  animation-name: beamFlicker;
}

.bulb:nth-child(3)::after,
.bulb:nth-child(3)::before {
  animation: bulbFlicker 2.1s infinite;
}

.bulb:nth-child(3)::before {
  animation-name: beamFlicker;
}

.bulb:nth-child(4)::after,
.bulb:nth-child(4)::before {
  animation: bulbFlicker 3.2s infinite;
}

.bulb:nth-child(4)::before {
  animation-name: beamFlicker;
}

.bulb:nth-child(5)::after,
.bulb:nth-child(5)::before {
  animation: bulbFlicker 2.9s infinite;
}

.bulb:nth-child(5)::before {
  animation-name: beamFlicker;
}

/* ===============================
   CONTENT
================================ */
.wrapper {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 420px;
}

.error-code {
  font-size: 140px;
  font-weight: 900;
  letter-spacing: -2px;
  margin-bottom: 12px;
  opacity: 0.85;
}

h1 {
  font-size: 26px;
  margin-bottom: 10px;
  font-weight: 600;
}

p {
  font-size: 15px;
  opacity: 0.75;
  line-height: 1.6;
  margin-bottom: 30px;
}

/* ===============================
   BUTTON
================================ */
.home-btn {
  display: inline-block;
  padding: 14px 36px;
  background: #fff;
  color: #000;
  text-decoration: none;
  font-weight: 700;
  border: 2px solid #fff;
  transition: background 0.25s ease, color 0.25s ease;
}

.home-btn:hover {
  background: #000;
  color: #fff;
}