/* ====================================
   7. BUTTONS
   ==================================== */
.btn {
    display: inline-block;
    padding: 1.3rem 3.5rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 1.1rem;
    text-align: center;
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: white;
    color: var(--primary);
    border-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.btn-primary:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35), 0 0 0 3px rgba(0, 102, 255, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    color: white;
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-6px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.btn-solid {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-solid:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 102, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}