/* Buttons (Sticker Style) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.8rem 1.8rem;
    border: 3px solid var(--border-strong);
    border-radius: 12px;
    font-family: var(--font-heading);
    font-weight: bold;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--primary);
    color: var(--text-primary);
}

.btn-primary:hover {
    background: var(--primary-strong);
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
}

.btn-primary:active {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--border-strong);
}

.btn-secondary {
    background: #fff;
    color: var(--text-primary);
    border: 3px solid var(--border-strong);
    border-radius: 12px;
}

.btn-secondary:hover {
    background: var(--secondary);
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--border-strong);
}

/* Button Loader */
.btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--border-strong);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.btn.loading .btn-content {
    display: none;
}

.btn.loading .btn-loader {
    display: block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}