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

body {
  font-family: Arial, Helvetica, sans-serif;
  color: #fff;

  /* 🔥 NỀN KIỂU MU */
  background:
    radial-gradient(circle at top, rgba(255, 200, 0, 0.08), transparent 40%),
    radial-gradient(circle at bottom, rgba(255, 0, 0, 0.08), transparent 40%),
    url("../assets/images/mu-bg.jpg");
  
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

/* ===== CONTAINER ===== */
.container {
  max-width: 900px;
  margin: auto;
  padding: 40px 20px;
  text-align: center;
}

/* ===== TITLE ===== */
h1 {
  font-size: 42px;
  margin-bottom: 30px;
  color: #ffd700;
  text-transform: uppercase;

  text-shadow:
    0 0 10px #ffcc00,
    0 0 20px #ff6600,
    2px 2px 5px #000;
}

/* ===== BOX ===== */
.box {
  background: rgba(0, 0, 0, 0.75);
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: 12px;

  margin-bottom: 25px;
  padding: 20px;

  box-shadow:
    0 0 15px rgba(255, 215, 0, 0.1),
    inset 0 0 20px rgba(0, 0, 0, 0.6);
  
  transition: 0.3s;
}

.box:hover {
  transform: translateY(-5px);
  box-shadow:
    0 0 25px rgba(255, 215, 0, 0.4),
    0 0 40px rgba(255, 100, 0, 0.2);
}

/* ===== TITLE BOX ===== */
.box h2 {
  font-size: 24px;
  margin-bottom: 15px;
  color: #ffcc00;

  text-shadow: 0 0 10px #ff9900;
}

/* ===== LIST ===== */
ul {
  list-style: none;
}

li {
  padding: 10px;
  margin: 6px 0;

  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid #ffcc00;
  border-radius: 6px;

  transition: 0.3s;
}

li:hover {
  background: rgba(255, 204, 0, 0.1);
  transform: translateX(5px);
}

/* ===== TOP 1 2 3 STYLE ===== */
li:nth-child(1) {
  border-left: 4px solid gold;
  color: #ffd700;
  font-weight: bold;
}

li:nth-child(2) {
  border-left: 4px solid silver;
  color: #c0c0c0;
}

li:nth-child(3) {
  border-left: 4px solid #cd7f32;
  color: #cd7f32;
}

/* =========================
   🌫️ SƯƠNG MÙ MU ONLINE
========================= */

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    pointer-events: none;
    z-index: 1;

    background: url("../assets/images/fog.png");
    background-size: cover;
    opacity: 0.15;

    animation: fogMove 60s linear infinite;
}

@keyframes fogMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(-25%, -25%);
    }
}


/* =========================
   🔥 ÁNH SÁNG PORTAL MU
========================= */

body::after {
    content: "";
    position: fixed;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 800px;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 2;

    background: radial-gradient(
        circle,
        rgba(255, 215, 0, 0.12) 0%,
        rgba(255, 100, 0, 0.08) 30%,
        transparent 70%
    );

    animation: pulseLight 6s ease-in-out infinite;
}

@keyframes pulseLight {
    0% {
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0.4;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.7;
    }
    100% {
        transform: translate(-50%, -50%) scale(0.9);
        opacity: 0.4;
    }
}