.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 22px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 700;
    font-size: 0.95rem;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
    cursor: pointer;
    overflow: hidden;
}

.btn::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.32), rgba(255, 255, 255, 0));
    transform: translateX(-120%);
    transition: transform 520ms ease;
}

.btn:hover::before {
    transform: translateX(120%);
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(1px) scale(0.99);
}

.btn--primary {
    background: var(--teal);
    color: #fff;
    box-shadow: 0 16px 30px rgba(27, 93, 99, 0.18);
}

.btn--primary:hover {
    background: var(--teal-strong);
    box-shadow: 0 20px 36px rgba(27, 93, 99, 0.24);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.72);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.72);
}

.btn--primary.water-drop::after,
.btn--ghost.water-drop::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 8px;
    width: 14px;
    height: 14px;
    transform: translateX(-50%);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.95);
    animation: drop 650ms ease-out forwards;
    box-shadow: 0 0 18px rgba(255, 255, 255, 0.55);
}

@keyframes drop {
    0% {
        transform: translateX(-50%) translateY(-6px) scale(0.7);
        opacity: 0.95;
    }

    60% {
        transform: translateX(-50%) translateY(14px) scale(1);
        opacity: 0.95;
    }

    100% {
        transform: translateX(-50%) translateY(34px) scale(0.2);
        opacity: 0;
    }
}