:root {
    --tet-crimson: #d32f2f;
    --tet-red-deep: #990000;
    --tet-gold-light: #fff3b0;
    --tet-gold-deep: #bf953f;
}

.nav-link-title {
    color: #fff !important;
}


/* Buttons - Nút màu đỏ */
.btn-tet,
.btn-cat-action.btn-tet,
.btn-premium-action.btn-tet {
    background: linear-gradient(135deg, var(--tet-crimson) 0%, #7a0000 100%) !important;
    border: 1px solid var(--tet-gold-deep) !important;
    font-weight: 700 !important;
    padding: 8px 20px !important;
    border-radius: 10px !important;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15) !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none !important;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-tet:hover,
.btn-cat-action.btn-tet:hover,
.btn-premium-action.btn-tet:hover {
    background: linear-gradient(135deg, #a50000 0%, #5a0000 100%) !important;
    border-color: var(--tet-gold-light) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(153, 0, 0, 0.25) !important;
}

.btn-tet::after {
    content: '🧧';
    position: absolute;
    bottom: -30px;
    right: 15px;
    font-size: 18px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
}

.btn-tet:hover {
    padding-right: 40px !important;
}

.btn-tet:hover::after {
    bottom: 8px;
    opacity: 1;
    transform: rotate(-10deg);
}

/* Tet Couplets - Bảng câu đối hai bên */
.tet-couplet {
    position: fixed;
    top: 110px;
    z-index: 1000;
    pointer-events: none;
    background: #a91b0d;
    color: #ffeb3b;
    padding: 20px 5px 30px 5px;
    font-size: 20px;
    font-weight: 800;
    text-align: center;
    border: 3px solid #f8c946;
    border-radius: 4px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    width: 65px;
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.2;
    background-image: url('data:image/svg+xml,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><circle cx="2" cy="2" r="1" fill="%23f8c946" fill-opacity="0.3"/></svg>');
}

.tet-couplet::before {
    content: '';
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 40px;
    background: #d4af37;
}

.tet-couplet::after {
    content: '◈';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    color: #d4af37;
    font-size: 20px;
    background: #8b0000;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #d4af37;
    z-index: 1;
}

.tet-couplet-left {
    left: 20px;
    animation: gentle-sway 4s infinite ease-in-out;
    transform-origin: top center;
}

.tet-couplet-right {
    right: 20px;
    animation: gentle-sway 3s infinite ease-in-out;
    animation-delay: -2s;
    transform-origin: top center;
}

@keyframes gentle-sway {
    0%, 100% {
        transform: rotate(-3deg);
    }
    50% {
        transform: rotate(3deg);
    }
}

.tet-couplet .couplet-content div {
    display: block;
    margin-bottom: 5px;

}