:root {
      --bg-color: #fff;
      --text-color: #111;
      --card-color: #f9f9f9;
    }
    body.dark {
      --bg-color: #111;
      --text-color: #fff;
      --card-color: #1c1c1c;
    }
    body {
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
      background: linear-gradient(-45deg, #1c92d2, #f2fcfe, #1c92d2, #f2fcfe);
      background-size: 400% 400%;
      animation: gradientBG 15s ease infinite;
      color: var(--text-color);
      display: flex;
      justify-content: center;
      align-items: center;
      height: 85vh;
      transition: all 0.4s ease;
    }
    @keyframes gradientBG {
      0% {background-position: 0% 50%;}
      50% {background-position: 100% 50%;}
      100% {background-position: 0% 50%;}
    }
    /* Cơ bản */
.music-btn-float {
  position: absolute;
  bottom: 12px;
  left: 12px;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f5a0, #00d9f5, #008cff, #7c00ff);
  background-size: 300% 300%;
  animation: gradientMove 6s ease infinite;
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.5), 0 0 20px rgba(0, 128, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  z-index: 10;
  transition: all 0.3s ease;
}

.music-btn-float:hover {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.8), 0 0 35px rgba(0, 128, 255, 0.6);
}

.music-btn-float .shine {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(120deg, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0.05) 100%);
  transform: rotate(25deg);
  pointer-events: none;
  animation: shineMove 3s infinite;
}

/* Dark mode – chỉnh màu nhẹ hơn, không quá sáng chói */
body[data-theme="dark"] .music-btn-float,
.dark-mode .music-btn-float {
  background: linear-gradient(135deg, #444, #666, #888);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}
/* Animations */
@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes shineMove {
  0% { transform: translateX(-100%) rotate(25deg); }
  100% { transform: translateX(100%) rotate(25deg); }
}

body[data-theme="dark"] .music-btn-float:hover,
.dark-mode .music-btn-float:hover {
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.3);
}

/* Nút thu nhỏ, góc trên phải */
.visit-button {
position: fixed;
top: 10px;
right: 10px;
display: flex;
align-items: center;
gap: 6px;
padding: 6px 12px;
background: linear-gradient(45deg, #4c89ff, #7aa8ff);
border: none;
border-radius: 20px;
color: white;
font-weight: 600;
font-size: 0.9rem;
cursor: pointer;
box-shadow: 0 3px 10px rgba(76, 137, 255, 0.6);
transition: background 0.3s ease, box-shadow 0.3s ease;
user-select: none;
z-index: 9999;
}

.visit-button:hover {
background: linear-gradient(45deg, #7aa8ff, #4c89ff);
box-shadow: 0 5px 15px rgba(76, 137, 255, 0.9);
}

.visit-button svg {
width: 18px;
height: 18px;
fill: white;
flex-shrink: 0;
}

.visit-count {
background: rgba(255 255 255 / 0.3);
border-radius: 12px;
padding: 1px 7px;
font-weight: 700;
user-select: text;
min-width: 20px;
text-align: center;
}

.music-btn-float:hover {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.8), 0 0 35px rgba(0, 128, 255, 0.6);
}

.music-btn-float .shine {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(120deg, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0.05) 100%);
  transform: rotate(25deg);
  pointer-events: none;
  animation: shineMove 3s infinite;
}

    .dark-toggle {
      position: absolute;
      bottom: 20px;
      right: 20px;
      cursor: pointer;
      transition: all 0.3s ease;
    }
    .dark-toggle img {
      width: 28px;
      height: 28px;
      transition: transform 0.3s;
    }
    .dark-toggle:hover img {
      transform: rotate(20deg) scale(1.1);
    }

    .profile-card {
      position: relative;
      padding: 25px;
      border-radius: 20px;
      background: var(--card-color);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
      width: 90%;
      max-width: 400px;
      text-align: center;
      transition: transform 0.4s;
    }
    @keyframes fadeInUp {
      0% {
        opacity: 0;
        transform: translateY(30px);
      }
      100% {
        opacity: 1;
        transform: translateY(0);
      }
    }
    .profile-card:hover {
      transform: perspective(1000px) rotateX(3deg) rotateY(3deg);
    }
    .avatar {
      width: 150px;
      height: 150px;
      border-radius: 50%;
      object-fit: cover;
      border: 5px solid white;
      box-shadow: 0 0 15px #fca00f;
      transition: 0.3s ease;
    }
    .avatar:hover {
      box-shadow: 0 0 30px #fca00f;
      transform: scale(1.03);
    }
    h2 {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 8px;
    }
    .meta-verified-icon {
      width: 20px;
      height: 20px;
    }
    .description {
      font-size: 14px;
      margin-bottom: 15px;
    }
    .socials {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      margin-top: 20px;
    }
    .socials a {
      padding: 10px 18px;
      border-radius: 30px;
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: all 0.3s ease;
      color: white; 
    }
    .socials a:nth-child(1) { background: #0068FF; }
    .socials a:nth-child(2) {
      background: linear-gradient(45deg, #feda75, #fa7e1e, #d62976, #962fbf, #4f5bd5);
    }
    .socials a:nth-child(3) { background: #010101; }
    .socials a:nth-child(4) { background: #1877F2; }

    .socials a:hover {
      transform: translateY(-3px) scale(1.05);
      opacity: 0.9;
    }
    .socials a img {
      width: 22px;
      height: 22px;
    }