:root {
    --miku-primary: #39c5bb;
    --miku-light: #b2ece7;
    --miku-dark: #005f58;
    --miku-bg: #e0f7f5;
}

body {
    font-family: 'Quicksand', 'Noto Sans JP', sans-serif;
    background-color: var(--miku-bg);
    background-image: radial-gradient(var(--miku-light) 1.5px, transparent 1.5px);
    background-size: 20px 20px;
    color: var(--miku-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
}

.card {
    background: #ffffff;
    padding: 30px;
    border-radius: 25px;
    box-shadow: 0 8px 20px rgba(57, 197, 187, 0.2);
    width: 100%;
    max-width: 380px;
    text-align: center;
    border: 3px solid var(--miku-light);
    position: relative;
}

.miku-avatar {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--miku-primary);
    margin-top: -65px;
    background: white;
    box-shadow: 0 5px 15px rgba(57, 197, 187, 0.3);
    transition: transform 0.3s ease;
}

.miku-avatar:hover {
    transform: scale(1.05) rotate(5deg);
}

h2 { 
    color: var(--miku-primary); 
    margin: 15px 0 5px 0; 
    font-weight: 900;
    font-size: 26px; /* Tăng size xíu cho chữ Donate me nổi bật */
    text-transform: uppercase;
}

.jp-sub {
    display: block;
    font-size: 14px;
    font-weight: normal;
    opacity: 0.8;
    margin-top: 2px;
}

p { 
    color: #666; 
    font-size: 14px; 
    line-height: 1.6; 
    margin-bottom: 25px;
}

.jp-text {
    display: block;
    font-size: 12px;
    color: #888;
    margin-top: 4px;
}

/* BUTTONS */
.btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 10px;
}

.btn {
    border: 2px solid var(--miku-primary);
    padding: 12px 5px;
    border-radius: 12px;
    cursor: pointer;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    font-size: 15px;
    flex: 1;
    background: white;
    color: var(--miku-primary);
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 0 var(--miku-light);
}

.btn small {
    font-size: 11px;
    opacity: 0.8;
    font-weight: normal;
    display: block;
    margin-top: 2px;
}

.btn:hover { 
    transform: translateY(-2px); 
    background: var(--miku-primary);
    color: white;
    box-shadow: 0 6px 0 var(--miku-dark);
}

.btn:active { 
    transform: translateY(2px); 
    box-shadow: 0 0 0 transparent;
}

/* QR AREA */
.qr-area {
    margin-top: 20px;
    display: none;
    animation: popUp 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    background: var(--miku-bg);
    padding: 15px;
    border-radius: 15px;
    border: 2px dashed var(--miku-primary);
}

.qr-img {
    width: 100%;
    max-width: 200px;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
}

.note { 
    font-size: 13px; 
    color: var(--miku-dark); 
    margin-top: 10px; 
    font-weight: bold;
}

@keyframes popUp {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}