/* 1. THIẾT LẬP NỀN VÀ CĂN GIỮA */
body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* 2. NỀN MATRIX */
#matrixCanvas {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
}

/* 3. CARD TRẮNG (GIỐNG ẢNH MẪU CỦA BẠN) */
.card {
    background: #ffffff;
    padding: 30px;
    border-radius: 40px; /* Bo góc cực tròn như ảnh */
    text-align: center;
    max-width: 330px;
    width: 90%;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

/* 4. CHI TIẾT BÊN TRONG CARD */
.avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid #fff;
    background: #e2e8f0;
    margin-bottom: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    font-size: 1.6rem;
    margin: 10px 0 5px 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.verified-tick {
    color: #1d9bf0;
    font-size: 1.2rem;
    margin-left: 8px;
}

.subtitle {
    color: #666;
    font-size: 1rem;
    margin-bottom: 20px;
}

/* 5. Ô LIÊN HỆ & NÚT BẤM */
.contact-box {
    background: #fff;
    border: 1px dashed #1d9bf0;
    padding: 12px;
    border-radius: 15px;
    margin-bottom: 20px;
}

.contact-box a {
    color: #1d9bf0;
    text-decoration: none;
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    font-size: 1rem;
    transition: 0.3s;
}

.github { background: #444b52; }
.facebook { background: #1877f2; }
.tiktok { background: linear-gradient(to right, #000, #25f4ee, #fe2c55); }

.social-links a:hover { transform: scale(1.03); }

/* 6. PHẦN NHẠC */
.youtube-music {
    background: #f8fafc;
    padding: 15px;
    border-radius: 25px;
    margin-top: 25px;
}

.youtube-music p {
    font-size: 0.8rem;
    color: #ff0000;
    font-weight: bold;
    margin-bottom: 10px;
}

#playBtn, #pauseBtn {
    background: #ff0000;
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 20px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

#playBtn:hover { transform: scale(1.05); background: #e60000; }

/* NỀN VÀ CĂN GIỮA */
body {
    margin: 0; padding: 0; overflow: hidden;
    background-color: #000;
    display: flex; justify-content: center; align-items: center;
    min-height: 100vh; font-family: 'Segoe UI', sans-serif;
}

#matrixCanvas { position: fixed; top: 0; left: 0; z-index: -1; }

/* CARD TRẮNG CHÍNH */
.card {
    background: #ffffff;
    padding: 35px; border-radius: 40px;
    text-align: center; max-width: 320px; width: 90%;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

/* HIỆU ỨNG AVATAR XOAY LẤP LÁNH */
.avatar-container {
    position: relative;
    width: 150px; height: 150px;
    margin: 0 auto 15px;
}

.avatar {
    width: 100%; height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #fff;
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.3);
    transition: 0.8s;
}

.avatar-container:hover .avatar {
    transform: rotateY(360deg); /* Xoay vòng tròn 3D */
    border-color: #00ff00;
    box-shadow: 0 0 25px #00ff00;
}

/* TEXT */
h1 { color: #333; font-size: 1.6rem; margin: 10px 0; display: flex; align-items: center; justify-content: center; }
.verified-tick { color: #1d9bf0; margin-left: 8px; }
.subtitle { color: #666; font-size: 0.95rem; margin-bottom: 20px; }

/* Ô LIÊN HỆ */
.contact-box { border: 1px dashed #1d9bf0; padding: 10px; border-radius: 15px; margin-bottom: 20px; }
.contact-box a { color: #1d9bf0; text-decoration: none; font-size: 0.85rem; font-weight: bold; }

/* NÚT MẠNG XÃ HỘI */
.social-links { display: flex; flex-direction: column; gap: 10px; }
.social-links a {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    padding: 12px; color: white; text-decoration: none;
    border-radius: 25px; font-weight: bold; transition: 0.3s;
}
.github { background: #333; }
.facebook { background: #1877f2; }
.tiktok { background: linear-gradient(to right, #000, #25f4ee, #fe2c55); }
.social-links a:hover { transform: scale(1.05); filter: brightness(1.2); }

/* HIỆU ỨNG VIỀN NHẠC GLOOM/FLASH */
.youtube-music {
    background: #f1f5f9;
    padding: 15px; border-radius: 25px; margin-top: 25px;
    border: 2px solid transparent;
    animation: borderGlow 3s infinite; /* Viền đổi màu liên tục */
}

@keyframes borderGlow {
    0% { border-color: #ff0000; box-shadow: 0 0 5px rgba(255, 0, 0, 0.2); }
    50% { border-color: #00ff00; box-shadow: 0 0 15px rgba(0, 255, 0, 0.4); }
    100% { border-color: #ff0000; box-shadow: 0 0 5px rgba(255, 0, 0, 0.2); }
}

.music-title { color: #ff0000; font-weight: bold; font-size: 0.75rem; margin-bottom: 10px; }

.glow-button {
    background: #ff0000; color: white; border: none;
    padding: 10px 25px; border-radius: 20px;
    font-weight: bold; cursor: pointer;
    transition: 0.3s;
}

.glow-button:hover { background: #e60000; box-shadow: 0 0 20px rgba(255, 0, 0, 0.6); }