/* Modern Advanced Button Styles */
:root {
    --btn-primary: #1e40af;
    --btn-secondary: #3b82f6;
    --btn-accent: #E94560;
    --btn-text: #ffffff;
}

.btn-advanced {
    position: relative;
    padding: 12px 35px;
    background: linear-gradient(135deg, var(--btn-primary), var(--btn-secondary));
    color: var(--btn-text);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.4s ease;
    box-shadow: 0 10px 20px rgba(30, 64, 175, 0.3);
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-advanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--btn-accent), #ff6b6b);
    z-index: -1;
    transition: opacity 0.4s ease;
    opacity: 0;
    border-radius: 50px;
}

.btn-advanced:hover::before {
    opacity: 1;
}

.btn-advanced:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(233, 69, 96, 0.4);
    color: white;
}

.btn-advanced::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 60%);
    transform: scale(0);
    opacity: 0;
    transition: transform 0.6s ease, opacity 0.6s ease;
}

.btn-advanced:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(233, 69, 96, 0.3);
}

.btn-advanced:active::after {
    transform: scale(1);
    opacity: 1;
    transition: 0s;
}

/* Shine Effect */
.btn-shine-effect {
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.4) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: skewX(-25deg);
    animation: shine 3s infinite;
    pointer-events: none;
}

@keyframes shine {
    0% {
        left: -100%;
        opacity: 0;
    }
    20% {
        left: 200%;
        opacity: 1;
    }
    100% {
        left: 200%;
        opacity: 0;
    }
}